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Publication numberUS1386832 A
Publication typeGrant
Publication dateAug 9, 1921
Filing dateFeb 28, 1920
Priority dateFeb 28, 1920
Publication numberUS 1386832 A, US 1386832A, US-A-1386832, US1386832 A, US1386832A
InventorsBailly Louis
Original AssigneeColumbus Oil Engine Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fuel-injector for two-stroke high-compression motors
US 1386832 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)





Patented Aug. 9, 19213,

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UNHTEE) STATES Parent entice.



' assesses.

To all whom it may concern Be it known that I, LOUIS BAILLY, a citizen of the French Republic, and resident of Columbus, State of Ohio, have invented cer tain new and useful F ueI-Inj ectors for Two Stroke High-Compression Motors, of which the following is a specification.

My invention relates to a new fuel injector for two stroke high compression motors in which-the fuel is fired by its con-' The objects oftact with compressed air. my invention are First To inject the fuel into thecylinder of the motor when the compression is almost complete, thus avoiding preignition.

Second: To permit an exact adjustment of the quantity of fuel injected according to the power wanted from the motor.

Third: To permit an :easy dismounting and easy replacement -of-the' injector, if necessary.

Fourth: To permitkan easy adjustment of the velocity of the 'fuel during injection. I

I attain .these objects by means of the ap' paratus shown in the accompanying drawing, which illustrates one of the ways of applying the principle of my discovery.

Figure l shows'a vertical section" of the apparatus as applied to a motor head, showing how the injector may be used on a motor. The motor head is shown in dotted ,or broken lines.

Fig. 2 shows specially the details of the fuel control through a; side view. Similar letters refer to similar parts throughout the two views.

The apparatus is composed as follows The body of the injector (A) is provided with inlet fuel opening at (A which is controlled by the ball valve U secured on its seat by the spring T. Two pistons (B) and (C) work in (A) with a differentiating action. The diameter of (C) is smaller than (B). The spring (S) pushes (B) against (G) on the valve seat (B The nut (D) closes the injector chamber and guides the piston (C) and the part (E). The packing nut (G) locked by the lockin nut (H) secures the packing material (R? in place, thusavoiding leakage along (C). The spring (I) placed in pushes (C) down, and the tension of the spring may be adjusted by means of the nut (F). The cam (N) connected with the guide (K)'by the spindle (0), which is held in place by i The spring (L be refilled. The

Specification of Letters Patent. I Pajbqg mfggqfl Aug, $9) 31921 Application filed February 28, 1920. Serial-No. seams.

the washer (P) and the pin (Q) allows the part (E) to be raised or lowered. The washer (M) equalizes the pressure of the cam (N) over the to surface of (E) at j holds the part (E) upward against the washer (K) 1s screwed into the head of the jacket of the motor.

The apparatus acts as follows First: The injector is filled with fuel. When the piston of the motor (V) is near water the end of its compression stroke it pushes the piston (B), which enters the injector chamber as the piston (C), raised by piston (B), goes out of the injector. The diameter of (C) being smaller than (B) there is compression in the injector (A). .The piston (C) s not compensated, and when the pressure in the injector (A) is higher than the pressure of the spring. (I) the piston (C) is lifted, allowing the fuel to rush into the cylinder of the motor through the opening (B provided at the bottom of the piston (B) as shown in drawing Fig. 1. When the piston of the engine (V) reaches its upper dead center it ceases to push the piston (B) and the piston needle valve (C) pressed downby the spring (I) sits again in the valve seat (B at the bottom of piston (B), which is compelled to travel downward as soon as the piston (V) begins its working stroke. There is then a compression created in (A) and the ball valve (U) 1s lifted, allowing the in'ector chamber to slpring )is used to main tam the piston )against the needle (0) at (B when the injector is not working. To regulate the fuel injection according to the power demanded from the motor, it is necessary to give the piston the right to go down as far as it is necessary. Accordingly the part (E) is actuated by the cam (N) which rmits adjustment of the lower point of tli e' stroke of piston,(C). The spring (L) presses constantly the part- (E) against the washer (M) which equalizes the pressure of the cam (N) on (E).- The cam (N) may be adjusted by hand or by an automatic regulator.

I claim as new the following features 1. The combination in a fuel injector having an inlet and controlling valve, of a pair of axially alined telescoping pump pistons, one of which is formed as a nozzle injector length of stroke by allowing the needle The guide and the other as a needle valve controlling said nozzle, said pistons being movable jointly, and means for normally holding said needle valve to its seat in the nozzle injector. j

2. The combination in a fuel injector having an inlet and controlling valve, of a 1161- low nozzle injector, a piston formed with a needle valve controlling said nozzle injector, resilient means for normally holding the needle valve in its nozzle seat, an adjustable box movable relatively to said injector, and a spring within the box bearing on said piston.

3. The combination in a fuel injector with an axially alined hollow nozzle piston and a needle valve piston of less diameter adapted to be jointly lifted by impact from a motor piston, means for lifting said needle valve piston by fiuid'pressure relative to the nozzle piston to permit'inflow of fuel gas,

and means for normally holding said needle valve to its seat in the nozzle injector.

4. The combination in a fuel injector having an inlet and controlling valve, of a hollow nozzle injector and its spring holding it in normal position, a piston formed with a needle valve located in and controlling said nozzle injector, said injector andvalve adapted to move jointly, and said needle valve being adapted to move relative to the nozzle injector under fluid ressure, a movable box supported above t e piston needle valve and a spring therein bearing on said needle valve, and a cam device for adjusting the position of said box for the purpose described.

Signed at Detroit in the county of Wayne and State of Michigan this 23rd day of v February, A. D.,1920.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2793079 *Aug 11, 1954May 21, 1957Nordberg Manufacturing CoBall injector valve
US2846987 *Mar 13, 1956Aug 12, 1958Frederick NettelReciprocating internal combustion engine
US3224684 *Apr 16, 1963Dec 21, 1965Hartford Machine Screw CoFuel injection nozzle
US3620456 *Jul 15, 1970Nov 16, 1971Kloeckner Humboldt Deutz AgFuel injection nozzle for internal combustion engines
US4539950 *Apr 23, 1984Sep 10, 1985Josef SchaichFour-stroke piston engine
US4640237 *Aug 22, 1985Feb 3, 1987Josef SchaichFour stroke piston engine
US4815422 *Feb 24, 1988Mar 28, 1989Josef SchaichFour stroke piston engine
US6227174Dec 29, 1999May 8, 2001Southwest Research InstitutePlunger-activated unit injector for internal combustion engines
U.S. Classification123/507, 239/533.9, 239/533.6, 239/91
International ClassificationF02M49/04, F02M49/00
Cooperative ClassificationF02M49/04
European ClassificationF02M49/04