WO1992011477A1 - End of fill detector for a hydraulic clutch - Google Patents
End of fill detector for a hydraulic clutch Download PDFInfo
- Publication number
- WO1992011477A1 WO1992011477A1 PCT/US1991/001116 US9101116W WO9211477A1 WO 1992011477 A1 WO1992011477 A1 WO 1992011477A1 US 9101116 W US9101116 W US 9101116W WO 9211477 A1 WO9211477 A1 WO 9211477A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- fill
- current
- armature
- clutch
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/68—Inputs being a function of gearing status
- F16H2059/6807—Status of gear-change operation, e.g. clutch fully engaged
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
- F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/86614—Electric
Definitions
- This invention relates generally to an apparatus and method for detecting an end-of-fill condition for a hydraulic actuator and more particularly, to an apparatus and method for detecting an EMF signal in a solenoid caused by the end-of-fill condition.
- Electronic control systems are particularly well suited for applications in which operating conditions or parameters change.
- Electronic transmission controllers for example, are becoming more prevalent because of their suitability for handling the complex tasks required for the shifting of a transmission between gear ratios.
- the engagement of a hydraulic clutch consists of two stages: the fill mode and the pressure modulation mode.
- the fill mode the clutch volume is filled with hydraulic fluid.
- the pressure modulation mode the pressure within the clutch volume is modulated (increased) to a pressure level to ensure proper and full engagement of the clutch.
- the solenoid is therefore, first energized to begin filling the clutch.
- the current applied to the solenoid is modulated (typically, in an increasing linear ramp function) to continue the flow of hydraulic fluid to the clutch and, thereby, increase the pressure to a level sufficient to properly engage the clutch.
- a timing strategy has been used to determine when the clutch has reached the end of fill condition.
- the solenoid's coil would be energized and the clutch would begin to fill with hydraulic fluid.
- the transmission controller would begin to modulate current, in an effort to fully engage the clutch.
- This procedure has several limitations. For example, operating conditions change the actual time required to fill the clutch. Since pump flow is a function of engine speed, pump flow will vary with engine speed. Other factors (for example, other hydraulic systems being supplied by the pump) may also affect pump flow. As the pump flow varies, the time required to fill the clutch will also vary. Other operating conditions which affect the clutch fill times are present gear ratio, desired gear ratio, transmission load, and inclination of the vehicle.
- clutch fill time If the proper fill time is not known or accurately estimated, the clutch will be in a overfill or underfill condition when the controller attempts to modulate clutch pressure to fully engage the clutch, Operation of the transmission by modulating the clutch pressure in a underfill or overfill condition will cause a "jerky" shift action and increase the rate at which wear and tear occurs.
- the present invention is directed at overcoming one or more of the problems as set forth above. Disclosure of the Invention
- an apparatus for detecting an end-of-fill condition of an actuator having a varying control volume includes a solenoid having a coil and an armature.
- the armature is movable relative to the coil in response to energization of the coil.
- a control valve delivers a flow of fluid to the actuator. The rate of the fluid flow is responsive to the movement of said armature.
- An electrical circuit detects a voltage spike across the coil and responsively produces an end-of-fill signal. The voltage spike is generated by an electromotive force produced by the armature in response to said control volume achieving said predetermined end-of-fill pressure.
- a method for detecting an end-of-fill condition of an actuator is provided.
- the actuator has a varying control volume and the end-of-fill condition corresponds to the varying control volume being pressurized to a predetermined end-of-fill pressure.
- the varying control volume is connected to a source of pressurized fluid by a control valve.
- the control valve is actuatable by a solenoid having a coil and an armature.
- the method includes the steps of energizing the coil with a first current, delivering a flow of fluid from the pressurized fluid to the actuator in response to the energization of the coil with the first current, and detecting a voltage spike in the coil and responsively producing an end-of-fill signal.
- Fig. 1 is a block diagram of a clutch and a control system having an end of fill detector according to the present invention
- Fig. 2A is a diagrammatical view of a single stage solenoid operated clutch cylinder
- Fig. 2B is a diagrammatical view of a solenoid operated clutch cylinder having a dual stage spool valve design
- Fig. 3A is an exemplary graph illustrating coil current and voltage during clutch actuation
- Fig. 3B is an exemplary graph illustrating spool position during clutch actuation
- Fig. 3C is an exemplary graph illustrating fluid flow during clutch actuation
- Fig. 3D is an exemplary graph illustrating clutch position during clutch actuation
- Fig. 4 is a schematic of a portion of the control system and the end-of-fill detector.
- the present invention 100 is adapted to controllably detect an end-of-fill condition of an actuator 102.
- the actuator 102 is a electrically operated solenoid actuated hydraulic clutch.
- a control means 110 produces a signal to engage the clutch 102.
- the control means 110 is a transmission controller adapted to controllably engage and disengage the clutches of a vehicle's transmission.
- the transmission controller 110 receives signals indicative of certain parameters of the vehicle (for example, engine speed, accelerator pedal position, and ground speed) and generates signals to engage/disengage the clutches in accordance with a set of shifting rules.
- controllers include a microcontroller or microcomputer.
- the signal from the transmission controller 110 is a current applied to the coil of an electrical solenoid 106.
- a valve means 104 delivers hydraulic fluid from a source of pressurized fluid to the clutch 102 in response to the current applied to the coil of the electrical solenoid 106.
- a reverse pressure differential is created within the valve means 104.
- the reverse pressure differential creates a voltage spike across the solenoid 106 (see discussion below) .
- a sensing means 108 detects the voltage spike and produces an end-of-fill signal.
- the solenoid 106 includes a coil 202, modeled as two boxes 202A,202B, and an armature 204.
- the valve means 104 includes a spool (control) valve 206.
- the spool valve 206 is connected between the clutch 102 and a source of pressurized fluid S, and includes a spool 208.
- the spool 208 is connected to the armature 204 of the solenoid 106.
- the spool valve 206 is said to be in a no-flow position. That is, there is no fluid flow between S and the clutch volume, C.
- a tank of hydraulic fluid T is also provided to allow the clutch 102 to drain.
- the pressurized hydraulic fluid is created by a pump arrangement (not shown) . Many such arrangements are known in the art, and are therefore not further discussed.
- a clutch volume, C is defined by the walls of the clutch 102 and a piston 210.
- the clutch 102 includes a number of clutch plates (not shown) . When the clutch volume, C, is pressurized to its end-of-fill pressure, the clutch plates are pinned together and the clutch 102 is said to be engaged.
- the clutch plates are modeled by a rod 212 and a spring 214.
- the spring 214 acts to bias the piston 210 to the left, thereby acting to decrease the clutch volume and to disengage the clutch 102.
- Feedback means 224 provides a restricted flow of fluid from the clutch volume, C back to the valve means 104.
- the feedback means 224 includes a restrictive orifice 226.
- Figs. 3A-3D graphical representations of the coil current (and voltage) , the flow of hydraulic fluid to the clutch 102 (Q) , spool position, and clutch position are shown for the purpose of illustrating the operation of the end-of-fill detector 100 during a typical fill operation.
- the controller 110 signals the solenoid 106 to actuate the valve means 104 and to fill (engage) the clutch 102.
- the controller 110 includes a pulse width modulated (PWM) solenoid driver for controlling the current supplied to the coil 202.
- PWM pulse width modulated
- the PWM solenoid driver delivers a first current level to the coil 202, as shown in Fig. 3A.
- the current within the coil 202 creates an electromotive force (EMF) within the solenoid 202.
- EMF electromotive force
- the armature 204 is movable relative to the coil 202 and in response to the EMF.
- the first current level from the PWM driver acts to move the armature 204 and therefore, the spool 208, from the minimum or original position towards a maximum position, see Fig. 3B. In the maximum position, maximum flow between S and C is allowed (see Fig. 3C) .
- a dual stage spool valve design includes a first spool or pilot valve 216 and a second spool or control valve 220.
- the solenoid 204 is connected to the first spool 218 of the first spool valve 216.
- the first spool 218 is movable in response to energization of the coil 202 and allows fluid to flow from S to the first control volume, C..
- the first spool valve 216 controls the flow of fluid to a second control volume, C, (the clutch volume) .
- the control valve 220 has a second spool 222.
- the second spool 222 allows fluid to flow from the first control volume, C. to the second control volume, C_ through a conduit in the second spool 222.
- the second spool 222 is spring biased to close the path between the source, S and the clutch volume.
- the first spool valve 216 creates a pressure differential across the second spool valve 220. When the pressure differential becomes large enough to overcome the biasing force, the spool moves and fluid is allowed to pass directly from S to the clutch through the second spool valve 220.
- valve means 104 There are many variations of such multistage designs with parameters suited to different applications. For example, different feedback schemes and spool designs will give the system different operating characteristics. Since the specific design of the valve means 104 is application specific and has no bearing on the present invention, no further discussion is given.
- the PWM driver 402 controllably connects the solenoid 106 to a source of electrical power, V_,.
- the solenoid 106 represents a load having variable inductance and resistance to the PWM driver 402.
- the coil 202 of the solenoid 106 is modeled by an inductor 406 and a resistor 404.
- the inductor 406 and the resistor 404 have respective magnitudes of L and R.
- a reverse biased flyback diode 408 is connected in parallel with the coil 202.
- the flyback diode 408 is reverse biased by the positive reference of the source V_ (hereafter referred to as +V ⁇ ) and no current flows through the diode 408; however, when the coil 202 is disconnected from +V_, the diode 408 provides a discharge current path to prevent possible damage by large voltage spikes.
- a first switching means 410 respectively connects and disconnects the coil 202 to and from +V D J> in response to receiving a first and second control signal.
- the first switching means 410 includes an npn power transistor 412 connected in a Darlington pair arrangement with a first pnp transistor 414 where the collector and emitter of the npn power transistor 412 are respectively connected to +V fate and the coil 202.
- the base of the first pnp transistor 414 is connected to the collector of a first controlling transistor 416 and to +V_ through a first resistor 418.
- the emitter of the first controlling transistor 416 is connected to the negative reference of the source V ⁇ (ground) through a second resistor 420.
- a first sensing means 422 senses the current flowing only through the flyback diode 408 and produces a signal having a magnitude responsive to the magnitude of the flyback current.
- the first means 422 includes a first current sensing resistor 424 connected between the anode of the flyback diode 408 and ground. The junction of the first current sensing resistor 424 and flyback diode 408 is connected through a third resistor 426 to a negative input of a first summing amplifier 428.
- a feedback resistor 430 is connected between an output and the negative input of the first summing amplifier 428.
- a ground resistor 431 connects the positive terminal of the first summing amplifier 428 to ground.
- the energy stored in the coil 202 is dissipated through the first current sensing resistor 424 and flyback diode 408 in such a manner that the voltage drop across the first current sensing resistor 424 is negative relative to ground.
- the first summing amplifier 428 by virtue of the connection to the negative input, inverts and amplifies the negative signal from the first current sensing resistor 424 to produce a positive signal which has a magnitude responsive to the magnitude of the actual flyback current.
- the location of the first current sensing resistor 424 necessitates that only the flyback current will impact upon the voltage drop of the first current sensing resistor 424.
- the first current sensing resistor 424 is not positioned within the energization current path and will have zero voltage drop during energization of the coil 202.
- a second sensing means 432 senses the current flowing only through the first switching means
- the second sensing means 410 and produces a signal having a magnitude proportional to the magnitude of the current in the first switching means 410.
- the current mirror 436 includes second and third pnp transistors 438,440, wherein the base of both the second and third transistors 438,440 and the collector of the second pnp transistor 438 are connected together.
- the emitter of the second pnp transistor 438 is connected to +V through the second current sensing resistor 434.
- the emitter of the third pnp transistor 440 is connected to +V availabilityi_> through a fourth resistor 442.
- the collector of the third pnp transistor 440 is connected to the non-inverting input of the first summing amplifier 428.
- the current mirror 436 produces an output current signal having a magnitude responsive to the magnitude of the current flowing through the second current sensing resistor 434 to the first summing amplifier. Selection of the ohmic value of the fourth resistor 442 relative to the value of the second current sensing resistor 434 determines the relationship between the input and output current of the mirror circuit 436.
- the output current of the mirror circuit 436 is directly proportional to the current delivered to the coil 202, but has a magnitude of only 1/lOOOth that of the energization current.
- the interconnected bases of the second and third pnp transistors 438,440 are also connected to ground through a second controlling transistor 444 and fifth resistor 446.
- the base of the second controlling transistor 444 is connected to the base of the first controlling transistor 416, such that when the previously discussed first 'high' logic signal is applied to the base of the controlling transistors 416,444, the second controlling transistor 444 is biased 'on', connecting the bases of the controlling transistors 438,440 to ground, and enabling the current mirror 436 to deliver the output signal to the first summing amplifier 428.
- a second 'low' logic signal delivered to the bases of the controlling transistors 416,444 biases both of the controlling transistors 416,444 'off, which disables the current mirror 436 and biases the power transistor 412, 'off.
- An input means 448 receives the flyback and switching current signals and delivers the first and second control signals to the first switching means 410 at a selected frequency and variable duty cycle.
- the duty cycle of the output signal is responsive to the magnitude of the output signal of the first summing amplifier 428.
- the input means 448 includes a comparator 450 which has a non-inverting input connected to the output of a second summing amplifier 452 and an inverting input connected a sawtooth waveform generator 454.
- the second summing amplifier 452 has a non-inverting terminal connected to the output of the first summing amplifier 428 through a sixth resistor 456 and to the output of the second summing amplifier 452 through a seventh resistor 458 and a first capacitor 460.
- the inverting input of the second summing amplifier 452 is connected to the control means 102.
- the control means supplies a controllable input voltage proportional to the desired level in the coil 202.
- the voltage output of the first summing amplifier 428 is proportional to the actual current flowing through the coil 202.
- the second summing amplifier 452 performs a comparison between the actual and desired currents and outputs a voltage (error) signal equivalent to the difference between the desired and actual current signals multiplied by a gain equal to the ratio of the seventh resistor 458 to the sixth resistor 456, plus an offset voltage equal to the controllable input voltage. For example, if the actual and desired current signals were equal then the output signal would be equal to the controllable input voltage.
- a positive error causes the output to decrease below the controllable input voltage and, conversely, a negative error results in an output which is greater than the controllable input voltage.
- the output of the second summing amplifier 452 is compared to the sawtooth waveform by the comparator 450 such that the output of the comparator 450 is a pulse width modulated constant frequency signal.
- the magnitude of the second summing amplifier 452 output determines the duty cycle output of the comparator 450. For example, if the output of the second summing amplifier 452 is 75% of the maximum value of the sawtooth waveform, which is indicative of a large error, then the output of the comparator 450 is 'high' for 75% of the cycle and 'low' for 25% of the cycle.
- the output of the second summing amplifier 452 is 25% of the maximum value of the sawtooth waveform, which is indicative of a small error, then the output of the comparator 450 is 'low' for 75% of the cycle and 'high' for 25% of the cycle.
- Operation of the first and second current sensor means 16,38 are complemental in nature. Each can only deliver current during the period of time when the other is not operating. For example, the presence of flyback current indicates that the power transistor 412 is biased 'off and that no current is flowing through the second current sensing resistor 434. Further, while the output of the first summing amplifier 428 is the sum of the two inputs, since neither input is simultaneously operational with the other, then the output is simply proportional to the individual inputs.
- the comparator 450 continually compares the magnitude of the output of the second summing amplifier 452 to the sawtooth waveform and is biased 'off when the magnitude of the sawtooth waveform falls below the output of the amplifier 452. Similarly, the comparator 450 is biased 'off when the magnitude of the sawtooth waveform rises above the output of the second summing amplifier 452.
- a means 462 detects a short circuit condition of the coil 202 by monitoring the magnitude of the current delivered to the coil 202.
- the means 462 includes a fourth pnp transistor 464 which has an emitter connected to +V- _,_> and to the base of the fourth pnp transistor 464 through an eighth resistor 466.
- a Zener diode 468 is connected between the base of the fourth pnp transistor 464 and the collector of the first controlling transistor 416. The cathode of the Zener diode 468 is connected to the base of the fourth pnp transistor 464.
- Zener diode 468 to decrease and turn the fourth pnp transistor 464 'on'. With transistor 464 biased
- +Vj___ is connected through a protection diode 470 to the base of an npn transistor 471.
- the npn transistor 471 has an emitter connected to ground and a collector connected to the bases of the controlling transistors 416,444. During a short circuit condition, the npn transistor 471 is biased 'on', which ultimately biases the power transistor 412
- the coil 202 cannot be energized.
- the sensing means 108 detects an end of fill condition of the clutch 102.
- a pressure differential across the spool valve creates a sizable transient change in the inductance of the coil 202.
- the coil 202 is modeled by the resistor 404 (R) and the inductor 406 (L) .
- the voltage across the coil 202 is therefore:
- V c (i x R) + (L x di/dt) + (i x dL/dt) + v 1#
- i the coil current
- di/dt the change in coil current with respect to time
- dL/dt the change in the inductance of the coil with respect to time
- v represents the eddy current voltage losses within the coil.
- V c (L x di/dt) + (i x dL/dt) + v ecl .
- L is a function of x and i, pit/ i , is the partial derivative of L with respect to i, and pL/px, is the partial derivative of L with respect to the spool position, x.
- V emf (L + i x pL/p i) x di/dt
- V emf i ( pL/px ) dx/dt.
- the control means 102 includes a highpass filter 472 and a difference amplifier 474.
- the voltage across the coil 202 is monitored through the error signal at the output of the second summing amplifier 452.
- a ninth resistor 476 connects the output of the second summing amplifier 452 to a buffer 478.
- a second capacitor 480 connects the junction of the ninth resistor 476 and the buffer 478 to ground.
- the highpass filter 472 strips the error signal of its AC or high frequency component.
- the output of the buffer 478 is connected to the negative terminal of the difference amplifier 474 through a tenth resistor 482.
- An eleventh resistor 484 connects the junction of the tenth resistor 482 and the negative terminal of the difference amplifier 474 to ground.
- a twelfth resistor 486 connects the positive terminal of the difference amplifier 474 to the output of the second summing amplifier 452.
- a thirteenth resistor 488 connects the output of the difference amplifier 474 to the positive terminal of the difference amplifier 474.
- the tenth and twelfth resistors 482,486 have substantially equal magnitudes of Rl and the eleventh and twelfth resistors have substantially equal magnitudes of R2.
- An analog to digital converter (A/D) 490 connects the output of the difference amplifier to the control means 110.
- the difference amplifier 474 subtracts the error signal (V ) from the filtered error signal (V_) and amplifies the magnitude.
- the magnitude of the resistor and capacitor values is dependent on the magnitude of the coil current, and the desired output level. For example, to amplify signals in the 10 to 200 millivolt (mv) range to 5V, an approximate gain of 50 is needed. Resistor values of 2,000 ohms and 100,000 ohms for Rl and R2 satisfy the gain requirement.
- the present invention is adapted to signal a transmission controller 110 at the occurrence of an end of fill condition of an electrical solenoid operated hydraulic clutch 102.
- the following description is only for the purposes of illustration and is not intended to limit the present invention as such. It will be recognizable, by those skilled in the art, that the present invention is suitable for a plurality of other applications.
- the transmission controller 110 controls the shifting of a transmission on a vehicle (not shown) between a plurality of gear ratios.
- the transmission may include three forward and three reverse gear ratios.
- the transmission controller 110 operates a plurality of electrical solenoids.
- the solenoids are adapted to engage/disengage the transmission's hydraulic clutches, such that the transmission is shifted to the desired gear ratio.
- the transmission controller 110 receives information related to the desired operation of the vehicle and to the vehicle's operating environment and energizes/deenergizes the solenoids.
- the controller 110 may receive information related to a desired or maximum gear ratio, the position of the accelerator pedal (not shown) , and/or the actual speed of the vehicle.
- the controller 110 Based on the received information, the controller 110, operates the hydraulic clutches through actuation of the solenoids in accordance with a set of programmed shift rules. For example, in response to the received information, the controller 110 requires an upshift to the third forward gear ratio. To implement this requirement, one or more clutches need to be disengaged and one or more additional clutches engaged. The exact clutch(es) to be engaged/disengaged are dependent upon the structure of the transmission.
- the controller 110 begins to fill the required clutches 102, as discussed above.
- the respective sensing means 108 signals the controller 110 that the end of fill condition has been reached and the controller 110 can begin to modulate the coil current to engage the clutch 102.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1991609854 DE69109854T2 (en) | 1990-12-24 | 1991-02-25 | REFILL DETECTOR FOR A HYDRAULIC CLUTCH. |
EP19910905467 EP0515563B1 (en) | 1990-12-24 | 1991-02-25 | End of fill detector for a hydraulic clutch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/632,906 US5054599A (en) | 1990-12-24 | 1990-12-24 | End of fill detector for a hydraulic clutch |
US632,906 | 1990-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992011477A1 true WO1992011477A1 (en) | 1992-07-09 |
Family
ID=24537460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/001116 WO1992011477A1 (en) | 1990-12-24 | 1991-02-25 | End of fill detector for a hydraulic clutch |
Country Status (6)
Country | Link |
---|---|
US (1) | US5054599A (en) |
EP (2) | EP0515563B1 (en) |
JP (1) | JPH05504609A (en) |
CA (1) | CA2069924A1 (en) |
DE (1) | DE69109854T2 (en) |
WO (1) | WO1992011477A1 (en) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5836335A (en) | 1991-08-19 | 1998-11-17 | Fluid Power Industries, Inc. | Proportional pressure control valve |
US5481187A (en) * | 1991-11-29 | 1996-01-02 | Caterpillar Inc. | Method and apparatus for determining the position of an armature in an electromagnetic actuator |
US5343994A (en) * | 1993-03-23 | 1994-09-06 | Caterpillar Inc. | End of fill detector for a hydraulic clutch |
NL9400727A (en) * | 1994-05-03 | 1995-12-01 | Gti Ind Automation Bv | Protection system with magnetic logic circuits. |
US5467854A (en) * | 1994-06-07 | 1995-11-21 | Caterpillar Inc. | Method of controlling clutch-to-clutch shifts for a powershift transmission |
US5505100A (en) * | 1994-09-29 | 1996-04-09 | Caterpillar Inc. | Method of controlling interrupted shifts for a powershift transmission |
US5611370A (en) * | 1994-11-10 | 1997-03-18 | Saturn Electronics & Engineering, Inc. | Proportional variable force solenoid control valve and transmission fluid control device |
US5580332A (en) * | 1995-04-13 | 1996-12-03 | Caterpillar Inc. | Method for determining the fill time of a transmission clutch |
US5551930A (en) * | 1995-04-13 | 1996-09-03 | Caterpillar Inc. | Adaptive control method for an automatic transmission |
US5722459A (en) * | 1995-05-31 | 1998-03-03 | Hyundai Motor Company | Pressure control valve of a hydraulic control system of an automatic transmission |
US5562125A (en) * | 1995-09-26 | 1996-10-08 | Caterpillar Inc. | Two stage electrohydraulic pressure control valve |
US5642653A (en) * | 1995-10-23 | 1997-07-01 | Caterpillar Inc. | Method and apparatus for providing detents on an electronic control handle |
JPH09280348A (en) * | 1996-04-10 | 1997-10-28 | Komatsu Ltd | Method and device for detecting wear of clutch of transmission |
US5890562A (en) * | 1996-08-16 | 1999-04-06 | Bt Prime Mover, Inc. | Control console for material handling vehicle |
US5941358A (en) * | 1997-12-16 | 1999-08-24 | Caterpillar Inc. | End-of-fill detector arrangement for a fluid actuated clutch |
US6115661A (en) * | 1998-04-09 | 2000-09-05 | Caterpillar Inc. | End-of-fill detector for a fluid actuated clutch |
US5950789A (en) * | 1998-04-27 | 1999-09-14 | Caterpillar Inc. | End of fill detector for a fluid actuated clutch |
US5992267A (en) * | 1998-10-26 | 1999-11-30 | Eaton Corporation | Robust control for three-position transmission shift actuator assembly |
US6179739B1 (en) | 1998-12-30 | 2001-01-30 | Hamilton Sunstrand Corporation | Continuously variable transmission with control arrangement and method for preventing transmission belt slippage |
US6126138A (en) * | 1998-12-30 | 2000-10-03 | Hamilton Sundstrand Corporation | Pressure reducing valve and continuously variable transmission with control arrangement using same |
US6202014B1 (en) | 1999-04-23 | 2001-03-13 | Clark Equipment Company | Features of main control computer for a power machine |
US6290620B1 (en) | 1999-06-25 | 2001-09-18 | Hamilton Sundstrand Corporation | Continuously variable transmission with control arrangement and method for reducing impact of shock load |
JP3559895B2 (en) * | 1999-10-18 | 2004-09-02 | 日産自動車株式会社 | Hydraulic pressure control device |
US6295497B1 (en) | 1999-10-27 | 2001-09-25 | Caterpillar Inc. | Method and apparatus for adaptively shifting ranges in a continuously variable transmission |
US6260440B1 (en) | 1999-12-17 | 2001-07-17 | Caterpillar Inc. | Method and apparatus for shifting ranges in a continuously variable transmission |
US6644350B1 (en) * | 2000-05-26 | 2003-11-11 | Acutex, Inc. | Variable pressure solenoid control valve |
US6402660B1 (en) | 2000-09-26 | 2002-06-11 | Caterpillar Inc. | Apparatus and method for adaptively shifting between ranges in a continuously variable transmission |
KR100391435B1 (en) * | 2000-12-27 | 2003-07-12 | 현대자동차주식회사 | Method for controlling a filling time to estimate clutch piston stroke |
US6640950B2 (en) * | 2001-12-28 | 2003-11-04 | Caterpillar Inc. | Fluid clutch fill detection system and method |
JP3861840B2 (en) * | 2003-04-09 | 2006-12-27 | トヨタ自動車株式会社 | Fluid pressure control circuit |
US6920971B2 (en) * | 2003-04-17 | 2005-07-26 | Caterpillar Inc | Cushioned hydraulic clutch/brake piston |
JP4269999B2 (en) * | 2003-06-30 | 2009-05-27 | トヨタ自動車株式会社 | Load element status detection device |
US7779853B2 (en) * | 2004-02-24 | 2010-08-24 | Parker-Hannifin Corporation | Proportional pressure control valve |
US20060169563A1 (en) * | 2004-12-24 | 2006-08-03 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method and apparatus for controlling the cooling of a clutch and for switching a safety function of the clutch of a motor vehicle |
DE102006061344A1 (en) * | 2006-12-22 | 2008-06-26 | Robert Bosch Gmbh | Clutch hydraulic circuit |
US9140337B2 (en) * | 2007-10-23 | 2015-09-22 | GM Global Technology Operations LLC | Method for model based clutch control and torque estimation |
US20100087999A1 (en) * | 2008-10-03 | 2010-04-08 | Gm Global Technology Operations, Inc. | Apparatus and Method for Detecting End-of-Fill at Clutch in Automatic Transmission |
DE102017202080A1 (en) | 2017-02-09 | 2018-08-09 | Zf Friedrichshafen Ag | Method for real-time monitoring of an electrofluidically actuated friction clutch and / or friction brake |
KR102602923B1 (en) * | 2018-10-10 | 2023-11-16 | 현대자동차주식회사 | Clutch control method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0308509A1 (en) * | 1987-03-25 | 1989-03-29 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic clutch pressure control apparatus |
US4942787A (en) * | 1988-03-03 | 1990-07-24 | Honda Giken Kogyo Kabushiki Kaisha | Apparatus for and method of controlling hydraulic clutch operation in an automatic transmission |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3295421A (en) * | 1964-03-16 | 1967-01-03 | Loran F Mccormick | Position control circuit |
US4135610A (en) * | 1976-06-07 | 1979-01-23 | International Harvester Company | Brake operated transmission clutches with fully-resetting modulator-load-piston |
JP2521897B2 (en) * | 1984-12-29 | 1996-08-07 | いすゞ自動車株式会社 | Ignition burner device |
DE3688321T2 (en) * | 1985-06-12 | 1993-10-14 | Daikin Ind Ltd | RELAXATION VALVE. |
US4653350A (en) * | 1985-11-29 | 1987-03-31 | General Motors Corporation | Adaptive direct pressure shift control for a motor vehicle transmission |
US4707789A (en) * | 1985-11-29 | 1987-11-17 | General Motors Corporation | Adaptive direct pressure shift control for a motor vehicle transmission |
US4871048A (en) * | 1987-09-21 | 1989-10-03 | Dresser Industries, Inc. | Control system for vehicle transmissions |
US4855911A (en) * | 1987-11-16 | 1989-08-08 | Massachusetts Institute Of Technology | Ultrasonic tissue characterization |
JPH01279148A (en) * | 1988-04-28 | 1989-11-09 | Komatsu Ltd | Device for controlling clutch hydraulic pressure |
US4949264A (en) * | 1988-09-29 | 1990-08-14 | Kubota, Ltd. | Transmission having electromagnetic proportional reduction valve |
US4936167A (en) * | 1989-03-09 | 1990-06-26 | Chrysler Corporation | Method of universally organizing shifts for an automatic transmission system |
-
1990
- 1990-12-24 US US07/632,906 patent/US5054599A/en not_active Expired - Fee Related
-
1991
- 1991-02-25 JP JP3505360A patent/JPH05504609A/en active Pending
- 1991-02-25 EP EP19910905467 patent/EP0515563B1/en not_active Expired - Lifetime
- 1991-02-25 DE DE1991609854 patent/DE69109854T2/en not_active Expired - Fee Related
- 1991-02-25 WO PCT/US1991/001116 patent/WO1992011477A1/en active IP Right Grant
- 1991-02-25 CA CA 2069924 patent/CA2069924A1/en not_active Abandoned
- 1991-02-25 EP EP19940104870 patent/EP0612939A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0308509A1 (en) * | 1987-03-25 | 1989-03-29 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic clutch pressure control apparatus |
US4942787A (en) * | 1988-03-03 | 1990-07-24 | Honda Giken Kogyo Kabushiki Kaisha | Apparatus for and method of controlling hydraulic clutch operation in an automatic transmission |
Also Published As
Publication number | Publication date |
---|---|
EP0612939A3 (en) | 1995-04-12 |
DE69109854D1 (en) | 1995-06-22 |
CA2069924A1 (en) | 1992-06-25 |
EP0515563B1 (en) | 1995-05-17 |
EP0515563A1 (en) | 1992-12-02 |
DE69109854T2 (en) | 1995-12-14 |
JPH05504609A (en) | 1993-07-15 |
US5054599A (en) | 1991-10-08 |
EP0612939A2 (en) | 1994-08-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5054599A (en) | End of fill detector for a hydraulic clutch | |
US5578904A (en) | Method and apparatus for determining the position of an armature of an electromagnetic actuator in response to the magnitude and time derivative of the actuator coil current | |
US5343994A (en) | End of fill detector for a hydraulic clutch | |
US4967385A (en) | Electronic control system for powershift transmission | |
US4855913A (en) | Electronic control system for powershift transmission | |
US5053960A (en) | Electronic control system for powershift transmission with compensation for variation in supply voltage | |
US5043892A (en) | Electronic control system for powershift transmission with compensation for magnetic coupling | |
EP3117131B1 (en) | Dual/variable gain oil pump control valve | |
CN103154756A (en) | Method and device for determining the state of an electrically controlled valve | |
DE102009043389A1 (en) | Device and method for detecting the filling end in a clutch in an automatic transmission | |
US5199313A (en) | Automatic selector device of a change-speed gearbox of a motor vehicle | |
EP1235005A2 (en) | Self-diagnosing pressure regulator apparatus | |
US5773981A (en) | Method of detecting linear solenoid inter-terminal short of electronic control type automatic transmission | |
US20040261551A1 (en) | State detecting device for load element receiving load of working fluid and state detecting device for fluid pressure control circuit | |
US7260462B2 (en) | Method for controlling an electromagnetic valve, in particular for an automatic transmission of a motor vehicle | |
SU1179915A3 (en) | System for controlling vehicle transmission engagement | |
US6891710B2 (en) | Method for control of a proportional magnet with a hold function | |
JPH11241739A (en) | Filling completion detector arrangement for fluid operating clutch | |
CN104884819A (en) | Fail operational modes for an electro-hydraulic system | |
JPH0681938A (en) | Continuously variable transmission control device | |
DE102008042453A1 (en) | Hydraulic control unit | |
JP2000006777A (en) | Control system for fluid-operated retarder and operating method for fluid-operated retarder | |
JP2760824B2 (en) | Control device for electronically controlled automatic transmission | |
EP3465702B1 (en) | A control circuit for inductive loads in vehicles, comprising current sense-, current comparator- and current recirculation circuits. | |
Beversdorf et al. | Current measurement in solenoids for automotive control systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 1991905467 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2069924 Country of ref document: CA |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
WWP | Wipo information: published in national office |
Ref document number: 1991905467 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1991905467 Country of ref document: EP |