Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1527456 A
Publication typeGrant
Publication dateFeb 24, 1925
Filing dateFeb 29, 1924
Priority dateFeb 29, 1924
Publication numberUS 1527456 A, US 1527456A, US-A-1527456, US1527456 A, US1527456A
InventorsDejoe Csandy, Edward Woydt
Original AssigneeDejoe Csandy, Edward Woydt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Valve-operating means
US 1527456 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Feb.. 24. 19.25. 11321456 E. WOYDT ET AL VALVE OPERATING MEANS Filed Feb. 29, 1924 Patented Feb. 24, 1925.

UNITED STATES PATENT oFFlcE.

vEDFAIRD WOYDT .AND DEJOE CSANDY, F DETRDIT, MICHIGAN.

VALVE-OPERATING MEANS.

'. Application led February 29, 1924. Serial No. 695,981.

To 'whom t may concern ".Be it known that we,`EDWARD Worn'r, a

ing mechanism and has special reference to a cam action that may be advantageously used in connection with high pressure internal combustion engines, especially of that type in which the liquid fuel, asl gasoline, is delivered to the combustion chambers or cylinders of the engines.

The primary object of our invention is to provide a set of cams for operating a single valve member, one of the cams having a constant action and the other a variable action, whereby compreion ratio of an engine may be changed during the operation of the engin Another object of our invention is to provide valve operating means including a cam within a cam and no'vel means for adjusting the inner cam whereb it may have a valve opening action in a Vance or behind the outer cam. i A further object of this invention is to provide a set of cams for operating a valve member with the cams arranged to be actuated in synchronism or one cam in `advance of the other with reeiprocable means for adjusting one of said cams. The above are a few of the objects attained by our invention and others will appear as the nature of our valve o erating be means is better understood, by ai of the accompanying drawing and the. following description. A

vIn the drawing,

Figure 1 is a bottom plan of one form o valve operating mechanism in accordance with our invention;

Fig. 2 is a side elevation of a valve member engaged by two cams adapted to cooperate in actuating the valve member;

Fig. 3 is a similar view showing one of the cams positioned to follow the action of the other cam;

, Fig. 4 is a vertical longitudinal sectional vewillustrating another form of our invention wherein one cam is within the other;

Fi 5 is a cross sectional view taken on the line V--V of Fig. 4 showing the cams arranged to operate together; l

Fig. is a similar view showing theinner cam adjusted relative to the outer cam;

Fig. 7 is a longitudinal sectional view cfa y hollow cam member; Fig. 8 is a cross sectional view of Same;

Fi 9 is. a longitudinal an a justable cam;

sectional view of Fig. 10 is a cross sectional view of the Same;

Fig. 11 is a longitudinal sectional View of another form of hollow cam member;

Fig. 12 is a cross sectional view of the same;

Fig. 13 is a vertical longitudinal sectional View illustrating a further modification of our invention, vand Fig. 14 is a cross sectional View taken on the line XIV-XIV of Fig. 13.

Reference will first be had to Figs. 1 to 3 inclusive showing a bearing 1 for parallel cam shafts 2 and 3 provided with cams 4 and 5 respectively adapted to actuate a puppet valve member 6.

On the cam shaft 2 is a long pitch or spiral gear wheel 7 meshing with a similar gear wheel 8 on a driven shaft 9.

v Telesco ing the end of the cam shaft 3 and slida le thereon vand adapted to rotate with said shaft is a sleeve 10 having .one end provided with a small spiral gear wheel 11 meshing with the gear wheel 7, so that the shaft 9 may drive the cam shafts 2 and 3 and simultaneously operate the cams 4 and 5, which if in the relation shown in Fig. 2, will cooperate in actuating the valve mem- Loosely connected to the sleeve 10 is a yoke 12 carried by an adjustable rod 13 in the support 14 provided with means 15 for holding the rod 13 in adjusted position. During the operation of the cam shafts 2 and 3 the adjustable rod 13 may reciprocate the sleeve 10 to move the spiral gear wheel 11 longitudinally of the spiral gear wheel 7 larit of the cam 5 relative to the cam 4,

for instance as shown in Fig. 3, where the cam 5 lags behind the cam 4 considering the shafts 2 and 3 driven in an equalized direction. This means that the cam 4 initially actuates the valve member and is followed by the cam 5, thus prolonging the actuation of the valve member. If the valve member controls a puppet valve such valve will be held open for a period of time greater than that caused b the cams 4 and 5 operating together, as s own in Fig. 2. 4

In Figs. 4, 5 and 6, we show another form of our invention wherein a bearing 16 supports the hub portion 17- of a gear wheel 18 driven from a gear wheel 19 on a drive shaft 20. Mounted in or integral with the hub portion 17 of the gear Wheel 18 is a tubular hollow cam member 21 having a portion thereof pressed out to form an outer cam 22 which is slotted, as at 23 to provide clearance for an inner cam 24. The inner cam 24 is slidably keyed relative to a shaft 25 which extends axially of the hollow'cam member 21 and is slidably keyed in a spiral member 26 ad'ustable axially of the gear wheel 18, sai spiral member having a threaded engagement with the gear Wheel which permits of the spiral member being driven by the gear Wheel and at any time during the rotation of the gear wheel adj usted therein. The spiral member 26 serves practically the same purpose as the small spiral gear Wheel 11 previously mentioned, and at the outer end of the spiral member 26 is a yoke 27 carried by an adjustable rod 28 in a support 29, the elements 27, 28 and 29 being similar to the elements 12, 13 and 14 previously described.

During rotation of the gear wheel 18 the spiral member 26 may be adjusted to change the angularity of the cam 24 relative to the cam 22, as best brought out in Figs. 5 and 6.

In Figs. 7 and 8 we show the cam member 21 outpressed to form a cam 3() and a somewhat similar cam may be formed, as shown in Figs. 11 and 12 by slitting the cam member 21, as at 31 and pressing the slitted portion outwardly to form a cam 32.

Figs. 9 and 10 show how the cam member 21 may be slotted, as at 33 to provide clearance for a cam 34 on the shaft 25.

Considering Figs. 13 and 14, the cam member 21 has a longitudinal slot 35 providing clearancefor a beveled cam 36 radially disposed on the shaft 25. The shaftl 25 may be adjusted relative to the spiral member 26 by 4an adjusting rod 37 loosely connected to said shaft and held by a support 38 provided With a locking device 39. The beveled cam 36 is adapted to engave the edge of the valve member 6 and it 1s obj vious that the shaft 25 may be shifted longitudinally of the Vcam member 21 to vary the action of the cam 36 relative to the valve member 6. By the sliding of the said cam 36 towards the valve member 6it may be brought into actuating position and thereby lronodify the operation of the said cam mem- It is thought that the operation and utility of our invention will be apparent without further description, and while in the drawing there are illustrated the preferred embodiments of our invention it is to be understood that the structural elements are susceptible to such variations and modifications as, fall within the scope of the appended claims. V

What we claim is 1. In a valve operating mechanism, means for the operation of a single valve comprising a tubular cam sha-ft having a valve operating cam thereon, and a further cam adapted to be reciprocated into operative position modifying the operation of said first mentioned cam.

2. In a valve operating mechanism, a pair of cams adapted to the combined operation of a single valve, one of said ca ms being axially reciprocable but of operative 4relation to the other of said cams, and means effecting the reciprocation of said reciprocable cam.

3. The combination With a valve member, of two cams adapted to engage and operate saidvalve member, cam operating means, and means coaxially of the operating means of one of saidcams for reciprocating the other cam into and out of operative relation to said valve member.

In testimony whereof we aHx our signatures in presence of two Witnesses.

EDWARD WOYDT. DEJOE CSANDY.

Witnesses: I

KARL H. BUTLER, ANNA M. Donn.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2440259 *Mar 9, 1945Apr 27, 1948Gray Thomas CCam actuated valve mechanism for fluid pressure engines
US2785668 *Nov 5, 1954Mar 19, 1957Fur Unternehmungen Der Eisen UConvertible internal combustion engine and compressor
US2940431 *Feb 14, 1958Jun 14, 1960Nordberg Manufacturing CoInternal combustion engine and control system
US3516394 *Jul 16, 1968Jun 23, 1970Roy G NicholsDevice for simultaneously advancing intake cam lobes and retarding exhaust cam lobes of an internal combustion engine while the engine is running
US4293995 *Oct 5, 1979Oct 13, 1981Klockner-Humboldt-Deutz AktiengesellschaftMethod of making camshaft for reciprocable piston engines
US4332222 *May 10, 1979Jun 1, 1982Volkswagenwerk AktiengesellschaftCamshaft for an internal combustion engine
US4382390 *Apr 23, 1981May 10, 1983Klockner-Humboldt-Deutz AktiengesellschaftCamshaft for reciprocable piston engines
US4535733 *Feb 12, 1985Aug 20, 1985Honda Giken Kogyo Kabushiki KaishaVariable valve timing apparatus
US4601266 *Dec 18, 1984Jul 22, 1986Renold PlcPhasing device for machine applications
US4770060 *Feb 19, 1986Sep 13, 1988Clemson UniversityApparatus and method for variable valve timing
US4771742 *Jan 15, 1987Sep 20, 1988Clemson UniversityMethod for continuous camlobe phasing
US4917058 *Apr 18, 1988Apr 17, 1990Clemson UniversityMethod of reducing pumping losses and improving brake specific fuel consumption for an internal combustion engine
US5161429 *Jan 29, 1992Nov 10, 1992Clemson UniversityVariable valve actuating apparatus
US5253546 *Jan 19, 1993Oct 19, 1993Clemson UniversityVariable valve actuating apparatus
US5417186 *Jun 28, 1993May 23, 1995Clemson UniversityDual-acting apparatus for variable valve timing and the like
US5441021 *Oct 31, 1994Aug 15, 1995Moore Variable Cam, Inc.Variable valve actuation camshaft
US6935292 *Mar 8, 2002Aug 30, 2005Thyssenkrupp Presta AgCamshaft with curvature
US7007652Sep 3, 2004Mar 7, 2006Transtar Pacific LimitedVariable duration valve timing camshaft
US7246588 *May 9, 2003Jul 24, 2007Nissan Motor Co., Ltd.Assembled camshaft for engine and production method thereof
US8186319Jun 13, 2008May 29, 2012Borgwarner Inc.Concentric cam with check valves in the spool for a phaser
US8375907Dec 18, 2008Feb 19, 2013Schaeffler Technologies AG & Co. KGCamshaft adjusting system
DE4301647A1 *Jan 22, 1993Jul 28, 1994Bayerische Motoren Werke AgMechanism for angular adjustment of engine cam shaft
DE102011076652A1May 27, 2011Nov 29, 2012Schwäbische Hüttenwerke Automotive GmbHVorrichtung zur Verstellung der relativen Drehwinkelposition geschachtelter Nockenwellen
EP0254058A2 *Jun 24, 1987Jan 27, 1988Süddeutsche Kolbenbolzenfabrik GmbHCamshaft for controlling the gas inlet and exhaust valves of an internal-combustion engine
EP1337743A1 *Oct 23, 2001Aug 27, 2003Transtar Pacific LimitedVariable duration valve timing camshaft
EP2527607A2May 22, 2012Nov 28, 2012Schwäbische Hüttenwerke Automotive GmbHDevice for adjusting a rotation angle position of nested camshafts relative to one another
WO1990013203A1Apr 7, 1990Nov 1, 1990Thomson Brandt GmbhTelevision transmission system with auxiliary signals
WO2003016684A1 *Aug 16, 2002Feb 27, 2003Mechadyne PlcAdjustable valve control system with twin cams and a cam lift summation lever
WO2009089983A1 *Dec 18, 2008Jul 23, 2009Schaeffler KgCamshaft adjusting system
WO2013171321A1 *May 16, 2013Nov 21, 2013Schaeffler Technologies AG & Co. KGCamshaft unit
Classifications
U.S. Classification74/568.00R, 123/90.17, 74/838
International ClassificationF01L13/00
Cooperative ClassificationF01L13/0057
European ClassificationF01L13/00D8