US2052459A

US2052459A - Combined fuel injection pump and nozzle for internal combustion engines

Info

Publication number: US2052459A
Application number: US12911A
Authority: US
Inventors: Joseph F Gelser
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-03-25
Filing date: 1935-03-25
Publication date: 1936-08-25
Anticipated expiration: 1953-08-25

Description

Aug. 25, 1936. .J. F. GEISER COMBINED FUEL INJECTION PUMP AND NOZZLE'FOR INTERNAL COMBUSTION ENGINES v Filed March 25, 1935 G'ez'aer AT1-dann WITNIII Patented Aug.. 25, 1936 UNITED STATES PATENT OFFICE COMBINED FUEL INJECTION PUMP AND NOZZLE FOR INTERNAL COMBUSTION ENGINES Joseph F. Geiser, Providence, R. I.

Application March 25, 1935, Serial No. 12,911

l Claim.

v fuel and introduces the atomized fuel to the engine under desired pressure against the motivating pressure of the engine.

-With these and othervobjects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

yFor a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure l is a vertical sectional view illustrating an injector adapted to a fragmentary portion of an engine'and constructed in accordance with my invention.

Figure 2 is a fragmentary horizontal sectional view showing means for mechanically opening and closing the injector to the combustion chamber of the engine.

Figure 3 is an exploded fragmentary perspective view of a feed nut and valve carried thereby and a fuel tube.

Figure 4 is a fragmentary vertical sectional view showing the injector closed to the combustion chamber andfree of the compression of the engine.

Referring in detail to the drawing, the numeral I indicates a fragmentary portion of an egme wherein the cylinder is indicated by the character 42, the intake and exhaust valves by the characters 3 and 4, the cylinder being closed by a head 5 and reciprocating in the cylinder is a piston 6. In the cylinder, between the piston and the head 5 is the firing chamber of the engine and the head is constructed to receive an injector 1 forming the subject matter"- of' the present invention.

The injector includes a housing d mounted in a passageway formed in the head E with its inner end terminating in the firing chamber of the engine and closed except for a port 9 placing the interior of the housing in communication with the combustion chamber. A head l0 is removably secured to the head 5 and overlies the outer end of the housing 8: integral with the head iii is astem il which projects into the housing and spaced therefrom. The stem is .equipped with a bore i2 communicative with a chamber I3 in the head l0. A fuel supply pipe il connects to the head I0 and is in communication with the chamber i3. A check valve I4 is located in the chamber for closing the fuel pipe ii against back pressure but which will permit fuel to iiow into the bore i2 of the stem. A check valve I5 similar to the check valve i4 is located lo* at the inner end of the bore l2. An elongated cylindrical piston I6 is journaled in the housing 8 and has a frictional fit with the stem Ii and is capable of rotating and sliding relative to the stem. A coil spring i1 .in the head ill acts 15 against the piston i6 to urge the latter in the direction of the inner end of the housing. A gear i8 is splined to the outer end of the piston and meshes with a rack bar i9. 'Ihe rack bar is connected to a suitable timing mechanism (not 20 shown) of the engine for the purpose of imparting, at timed intervals, oscillatory movement to the piston.

The inner end of the piston carries a nozzle or a jet 2li arranged in alignment with the port 25 9 and this jet is opened and closed by a needle type valve 2i slidably mounted in .a sleeve 22 forming an integral part of a feed nut 23. The feed nut is splined to the inner end of the stem il' and the threads thereof mesh with threads 30 formed on the piston. The sleeve, feed nut and inner end of the stem il' form a fuel chamber 24, the latter being closed to the jet 2li `by the spring pressed needle valve 2|.

The piston i6 is moved endwise in one direc- 35 tion by the compression developed by the piston t of the engine and is moved endwise in an opposite direction by the action of the spring il. The reciprocation of. the piston i develops a partial vacuum which acts to draw fuel into the fuel chamber 2li passing the check valves and lsaid fuel is compressed by the reciprocation of said piston it and delivers said compressed fuel to the combustion chamber of the engine. The

timing mechanism imparts rotation to the pistonl 45 y i6 in one direction when the piston completes its the firing of the fuel in the combustion chamber of the engine, the timing mechanism (not shown) imparts a reverse rotation to the piston, bringing about closing of the nozzle or jet by the needle 2|. The piston IB returns to its initial position against the inner end of the housing when the piston 6 of the 'engine is on its exhaust stroke causing a vacuum in the fuel chamber and suck.

andhaving a frictional fit with the stem and provided with feed threads. a feed nut slidably connected to the stem and meshing with the feed threads of the piston, a sleeve having passages carried by the feed nut and cooperating with the latter and the stem in dening a fuel chamber, a nozzle carried by the piston, a self-seating valve carried by the sleeve for opening and closing the nozzle. a spring engaging the piston carried by the head for eifecting movement of the piston in one direction, a gear on the piston, and a rack bar engaging the gear and movable at timed intervals for effecting oscillation of the piston to engage and disengage the valve with the nozzle.

JOSEPH F. GEISER.