US1691127A - Charge forming and injecting device for internal-combustion engines - Google Patents

Description

Nov. 13, 1928.

A." G. REDMOND CHARGE FORMING AND INJECTING DEVICE FOR INTERNAL COMBUSTION ENGINES 7 Filed Mafch 19, 1920 Patented Nov. 13,1928.

I UNITED STATES PATENTTOFFICE.

' ALBERT GREEN annlvroun, or INDIANAPOLIS, INDIANA, ASSIGNQB 'ro MARVEL cm- BURETOR COMPANY, or rLIN'r, MICHIGAN, ACORPORATION or INDIANA.

CHARGE FORMING AND INJECTING, DEVICE INTERNAL-COMBUSTIONENGINES.

Application filed March 19, 1920. Serial No. 367,246.

This invention relates to a charge forming and injecting device for internal combustion engines, the object being to provide a device by means of which a very rich mixture of fuel and air can be pumped to the cylinders of the internal combustibn engine and. injected on the compression stroke in the form of vapor in order-to prevent condensation of the fuel through the ordinary manifold now employed'in connection with a carbureter.

Another object of the invention is to-providea charge forming and injecting device which is so constructed that the charge of fuel is controlled bya. suction controlled valve whereby the opening of the valve. will allow fuel to pass into the pumps and be injected into the cylinders, thereby overcom-- ing the difli'culties now existing in charge forming devices which depend upon the air to lift the fuel from the jets and carry it to the cylinders. j

Another and further object of the invention is to provide a device by means of which the explosive charge in the form of vapor s sprayed into the cylinder just before the ignition, thereby preventing pre-igmtion.

-A still further object of the invention'ls to provide a device whereby each cylinder in its order of firing will be supplied with an explosive charge formed of air and fuel so that a perfect combustion will beobtained.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the'drawings, g Figure 1 is' a vertical'section through a charge forming and injecting device constructed in accordance with my invention.

Figure 2 is a section taken on line 22 of Figure 1.

In carrying out my invention I employ afloat or fuel chamber 1 which. is provided with fuelinlet 2 controlled by needle valve.

3 through the medium of float 4 of the ordinary construction whereby the fuel will be maintained at a predetermined level within the fuel chamber. Formed integral with the fuel chamber 1 is a casing 5-havingan air inlet 6 and a throttle chamber 7 in which is mounted a throttle valve 8 controlled by a lever 9 in the ordinary manner fromthe-dash of themotor vehicle to which the device isattached. Extending from the throttle chamber is an induction pipe lO corresponding to the inlet manifold and through which air is adapted to be admited to the cylinder through the valves in the ordinary manner.

The casing 5 is provided with a valve seat 11 in which is seated a' suction controlled valve 12 which is adapted to be raised off the seat by the suction of the engine in order to allow air to be drawn through inlet 6 into the chamber 13 and out through the throttle chamber. Said valve is held on the seat by spring 14 mounted in a hollow adjusting screw 15 working in the threaded bore 16 formed on the casing whereby the tension of the spring can be adjusted. The valve is provided with a sleeve 17 in which is arranged a lug 18 adapted to receive a suitable instrument inserted through adjusting screw 15 for the I purpose hereinafter fully described. The adjusting screw 15 carries a plug 19 for closing the upper end which can bereadily removed to allow the instrument to be inserted for rotating the valve. Ar-

gui eway 20 in which the tubular stem 21 of the valve 12 is slidably mounted for guiding the valve in its vertical movement, said tubular portion-communicating with the fuel chamber 1 as clearly shown. The valve stem 21 is provided with a threaded bore 22 in which is adjustably mounted the threaded upper end 23 of needle valve 24 which is adapted to be seated in the valveseat 25 formed in the outlet 26 of the fuel chamber 1 as clearly shown in Figure 1. The valve 24 is provided with a reduced portion 27 preferably rectangular .in shape which is slidably mounted in a guide member 28 for ranged within the inlet passage is a tubular preventing the valve from turning and by re moving the plug 19 and inserting an instrument through the hollow screw 15 and rotating the valve 12, the needle valve 24 'can'be adjusted in respect to seat 25 'for regulating 'ed to be drawn-so as to mix with the fuel.

Extending from the air well or chamber30 is a passage 32 which communicates with a fuel passage 33, The fuel passage 33 is here in shown formed in the integral extension of the fuel chamber l and-has a plurality of versp ng tical fuel passages 34 which communicate .with a pluralityl of cylinders-35 mounted on theextensiomt e fuel'passages 34 being controlled by check valves 36.

-T-he cylinders 35 herein shown six in number, one for each cylinder of the combustion spring 41, said ,plu'nger being herein shown I operated bycams 42 carriedby shaft 43 extending lengthwise throu h the housing and driven through. the me ium of suitable.

driving mechanism from theengine and so timed that the plunger corresponding-to the particular cylinder will be operated on the compression stroke so as to in ect a charge of fuelinto the/cylinder as will be hereinafter fully described. The extension inwhich the pumpcylinders are mounted is provided with a plurality of outlets 44, one for each cylinder, each outlet being controlled by a pressed-check valve 45 and having a coupling member 46 from whichextends'a -1 ipe 47 extending to each "cylinder of the englue and through which the explosive charge ormed of fuel and airis forced by the action of the pump so as to inject on the compression stroke a very rich mixture of fuel and air in the'form of vaporinto the cylinderbefo'rethe cylinder is fired.

In the drawing cylinders, one for each cylinder of a six-cylinder internal combustion engine and it is of the engine is running at high speed. With course understood that where the device is used in connection with a four-cylinder internal combustion engine only four cylinders will be employedand when the device is used eight cylinders 'will be employed, one pump cy inder for each cylinder of the internal combustion: engine in order to inject into the cylinder at the start of the compression stroke of theengine a'rich mixture offuel,

which, istimed throu h suitable gears by the engine so that the c arge will be injected at the proper time. I have also shown'cams for operating the plungers of the pumps but it is of course understood that these plungers can be'operated by an other means desired and I do not wish to limit myself to the details of construction herein shown as my invention consists broadly inprovidinga fuel injector for injecting an explosive charge into the cylinder which iscontrolled by sue tion controlled valve which in turn is. co ntrolled by the position of the throttle when the throttle open the' increased vacuum will allow a greater amount of fuel to pass out of the fuel chamber-into the air chamber and bemixed with air from which it will be I have shown six pump livered thereto.

drawn by the suctions of the pumps and injected into the cylinders of the internal co'm- Q scribed, the air for the char eis drawn in by .the suction of the engine t rough the inlet valves, which air controls theposition of the suction controlled valve so as to regulate the amount of fuel delivered to'the pump cylinders and as the fuel in its passage to the pump cylinder is mixed with air, a very rich mixture in the form of vapor is injected into each cylinder of. the internal combustion engine on the start of the compression stroke of the engine.

What I. claim is: 1.'A charge forming and injecting device for internal combustion engines comprising a fuel chamber having an outlet, an air passa'gecommunicating with the internal co1nbust1oneng1ne,-a suction controlled valve arranged in said air passage, avalve operated by said suction controlled valve for'controlsling the outlet of fuel froxnsaid fuel chamber and a plurality of pump cylinders co'm. municating with said outlet passage having outlets corresponding to the cylinders of-the internal combustion engine, for injecting fuel into the cylinders of said engine.

2. A charge forming and .'n]ecting device for internal combustion engines having a plurality of chambers in communication with the respective cylinders of said engine, means for injecting the, explosive charge from said chambersinto the cylinders of the engine and means controlled by the suction of the engine for governing the charge de- 3. Acharge forming and injecting device plurality of pump cylinders rovided with conduits leadlng to the cylin ers of the engine,- means operated by the engine for o crating said pumps for injecting fuel intot e cylinders on the compression stroke and means controlled by the suction of the engine for regulating theguantityof fuel delivered to sai pump cylin ers.

4. In a charge foflnlng and injecting'device for. internal combustion engines, [the combination with a. reservoir having a valve controlled outlet, an air passage provided with-a suction controlled valve for controlling the first mentioned valve, a plurality of. pump cylinders, passages extending from the outlet of said reservoir to said pump 0 linders and means driven by the engine i or operating said pump cylinders for injecting an explosive charge into the cylinders of the enginevon the compression stroke.

for internal combustion engines having a f in connect on with an eight-cyl nder engine,

5. A charge forming and injecting device for internal combustion en 'nes having means for in ecting an exp os1ve charge formed of fuel and air into thecylinders of the-engi ne on the compression stroke thereof and means controlled by the suction of the engine for regulating thequantity of fuel delivered'to said injecting means.

6. A charge forming and injecting device for internal combustion engines comprising a a.fuel reservoir having an outlet, a needle valve for controlling the fuel from said reservoir having a suction controlled valve and a plurality of pump cylinders in communication with said fuel outlet for injecting an explosive charge formed of fuel and air into the cylinders of said engine on the-compression stroke thereof. I

8; A charge forming and injecting device for internal combustion engines comprising a pluralityof pumps,'means controlled by the suction of the engine for delivering to the cylinders of said pump an explosive charge formed of fuel and air and means, operated by the engine for operating said pumps for delivering the explosive charge into the cylinders of the engine on the compression stroke thereof.

9. A charge forming and injecting device for internal combustion engines comprising a casing having an air passage adapted to be connected to the induction pipe of the-internal combustion engine, said air passage hav- 'ing a throttle valve mounted therein, a suction controlled valve mounted in'said air passage, a fuel chamber having an outlet, a valve mounted to control said outlet, said valve having an adjustable connection with said suction controlled valve, an air chamber in communication with the outlet of said fuel reservoir, a plurality ofpump cylinders in communication with said air chamber and a fuel conduit extending from each of said pumps to a cylinder of the internal combustion engine.

10. The combination with an internal combustion engine provided'with a plurality of cylinders, of a plurality of pumps having fuel conduits communicating with the respective.

v cylinders, means operated by the engine for operating the pumps at a predetermined time and means controlled by the suction of the engine for regulating the supply of fuel to said pumps.

11. A charge forming device for internal combustion engines having means for vaporizing fuel, a plurality of pumps, means for delivering fuel to said pumps, means operated by the engine for driving said pumps for injecting the fuel delivered thereto into the respective cylinders of the engine on the compression stroke of the piston and means controlled by the suction of the engine for controling the amount of fuel delivered to said pumps. 1

12. The combination with' aninternal combustion engine provided with a plurality of cylinders and having an intake manifold, a casing providedwith an air passage connectedto said manifold, said casing being provided with a throttle valve, a suction controlled valve for closing said passage, a fuel chamber having an outlet, a valve mounted in said fuel chamber controlling said outlet,

said valve being adjustably connected to said suction controlled valve, an air chamber havinga calibrated openin in communication with the outlet of saidf u passage in communication with said air chamber,xa plurality of ump cylinders in communication with said el passage, means driven by the} engine for operating said pumpsand fuel conduits leading from said pump to the respective cylinder of the engine for delivering a charge offuel and air to the respective cylinder on the compression stroke of the piston.

13. A charge forming and injecting device for internal combustion engines comprising an injecting device, a device controlled by the suction of the engine for regulating the supply of -explosive charge to said injecting device and means timed with the engine for operating said injecting device for delivering the explosive charge to the cylinder of the engine on the compression stroke thereof.

14. A charge forming and injecting device for internal combustion engines having, a plurality of pump chambers in communication with the respective cylinders of said engine, said chambers being in communication with the source of fuel supply, pistons working in said pump chambers for injecting the explosive charge from said chambers into the cy inders of the engine and means controlled by the suction of the en ine for-governing the supply of fuel to said 0 ambers.

15. A charge forming and injecting device for internal combustion engines comprising a casing having anair passage adapted to be connected to the induction pipe of an internal combustion engine, a suction controlled valve mounted in said air passage,' a fuel chamber having an outlet, a valve mounted to control said outlet having a connection with said suction controlled valve, an air chamber in communication with the outlet of said fuel reservoir, a plurality of pump cylinders in communication with said air chamber and a fuel conduit extending from each of said pumps to a cylinder of the internal combustion enginee1 chamber, a fuel] chamber in communication for internal combustion en ines comprising an in'ecting device, a pre iminary mixing cham r in communicatlon with' said injecting device, a device controlled by the suction of'the engine for regulating the supply of.

fuel to saidpreliminary mixlng chamber and means timed with the engine -f0r.operating said injecting device for delivering the explosive charge to the cylinders of the engine.

In t imOny whereoi'I hereunto-aflixmy 3 signatur v ALBERT GREE REDMOND.

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