US2592367A

US2592367A - Fuel injection system

Info

Publication number: US2592367A
Application number: US709603A
Authority: US
Inventors: Jr George B Wood
Original assignee: American Bosch Arma Corp
Current assignee: Ambac International Corp
Priority date: 1946-11-13
Filing date: 1946-11-13
Publication date: 1952-04-08
Anticipated expiration: 1969-04-08

Description

April ,1952 G. B. wooD, JR 2,592,367

FUEL INJECTION SYSTEM Filed NOV. 13, 1946 INVENTOR. Glzolzer. B. WOOD,JE.

ATTOENEX ?etented Apr. 8, 1952 TENT OFFICE FUEDQINJECTION SYSTEM Ge rgeBhWood, Jr., SpringfieIgl Mass assignor o. Amri an..-.B9s@ rpor ion, springfieldl, M ss a comp etio of Y k Application Nove'mber 13, 1946, Serial No. 709,603 6;.Claims, (Cl. 103%1) This invention-relates to fuel injection systems and more particularly to such systems wherein aplurality offuel injection pumps are employed whereby the mechanical load -.on the engine is balanced;

An object of the inventionisto-provide a'fuel injection systemhaving-a-master pump and one or more slave pumps wherein-the quantity'of fuel delivered'and-the timingof all of the pumps is controlled by the controls for the master-pump.

Another object of the invention is to provide a fuel injection systemofthe type setforth'wherein -a plurality of pumps areemployed with all of the controls on one of. thepumps whereby merely a single adjustment of the controls-is necessary for adjusting all ofthe pumps-and-yet a doublepump' construction is provided-for balancing the drive forces or mechanical loads on the engine. a c

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawing. It will be understood that many changes may be made in the details of construction and arrangement of parts without depart-- ing from the spirit of the invention as expressed in the accompanying claims.- I, therefore, do not wish to be limited to the exact details of construction. and arrangement of parts shown and described, as the preferred form has been shown by .way of illustration only- Referring to the drawing;

In the drawing there is shown a diagrammatic view, partly in section, showing one form; of fuel injection system embodying the invention.

Referring more particularly to the drawing, the fuel injection system shown. comprises a. master pump l, a slave pump 2 and a nozzle 3.

The nozzle 3 may be of any suitable conventional nozzle or accumulator nozzle type.

The fuel delivery lines A, 5 and B are provided between the pumps and connecting the pumps to the nozzle 3.

The pumps I and 2 are adapted to receive fuel from the usual type fuel supply tank through the fuel line i which has

branches

8 and 9 connecting said line to the pumps 1 and 2 respectively, and fuel is adapted to pass through said line and branches as shown by the arrows in the draw- The slave pump 2 comprises the housing It having the annular fuel sump H which is connected to the branch 9 of the fuel supply line 7, and the barrel 12 in which is reciprocably mounted the plunger [8a and which barrel is provided with the ports l3 connecting the fuelisump it with the bore. l4.:.of the barrel l2;whioh -forms the pumping chamberof the pumphandi which is. connected. with the fuel delivery line l.

The master .pumpl comprises the housingjgi having the-fuel sump 16 connected to the branch 8 of the fuelsupplyline'l and contains the bar rel ll. in which is mounted the plunger. I 8;Wh'lph plunger is adapted to reciprocatein the bore [9 inthe barrel ll. The barrel. H is providedv with the annula sp roov .29. whic v .connecte by the port 2! to the fuel sump it and the spill ports 22 which-connect the bore IQAvithsaid sumnlfi T e. lun e 181 i;hams r-rump; l s of d ubl hel xi pa t t is, it i I pro ded .w'th h i e fiz onii o osite ide sm n 011W. ch how an a d un e s. also pre iec with; -the bore 23 co: municating with the bor e I-SJof-the barrel ll 'at its upper end and which b recw ec edb t e re 24 xtend ns throu h ihe e lu ed t ntfi of t l n er a its l r. nd :b lo the 1 edge 3 .1 the plun er-1. ,8;-i-

he..f e drain l ne lit-is pr ded with-th branches 2? and -25 and is. adapted to drain off any eak e The baigreLl'l is provided-with a; gear segment in; engagement with; the control .rack- 2 9 whereby said ba e.1.;. ga e-adivs e dirsini o aid. on l a rd us t e. qua t t o fuel delivered by both pumps andthe geartt operates rack teeth on the-barrel for-adj-us ng the barrel vertically for timing the delivery of bothpumps. From this it will be seen'that the qpan t oi vfuel d l v ed b e-b th bu ings-con.- tr 11ed-bvro i ns th rel q h masier urnp l by means of thecontrolrack-Zfi .whichpper tes a gear segment on theibarreliand-the reciprocating or vertical adjustmentof the barrel by means of the gear 30 operating the rack teeth on the barrel adjusts the delivery timing for both pumps.

At the upper end of the pump I is provided the delivery valve member 3! which is in the form of an annular flexible spring disc member which is secured to the member 32 which extends into the upper end of the bore l9 and which has an opening therethrough adapted to be aligned with the fuel delivery line branch 5.

In the operation of the pumps as the plungers move upward on their pumping stroke, the plunger I8a in the pump 2 closes oif the fill port l3 at about the same time the plunger l8 closes off the annular spill groove 29. The plungers continue to move in the bores l4 and I9 respectively and fuel is pumped through the lines 4 and 5 through the bore or hole 23 and port 24 in plunger 18 and out through the metering spill ports 22 until the helix on the plunger [8 closes off the metering ports 22 and as the plungers continue to move in, fuel is delivered to the nozzle through the fuel delivery lines 4, 5 and 6 until the spill edge 33 of the plunger l8 passes the bottom edge of spill groove 20 which then spills in the usual manner.

It will be noted that the start of pumping and the end of pumping of both pumps are controlled by the metering events of the master pump.

While only a single slave pump has been shown in conjunction with the master pump, it will be obvious that additional slave pumps could be employed if desired.

From the foregoing it will be seen that I have provided simple, efiicient and economical means for obtaining all of the objects and advantages of the invention.

Having described my invention, I claim:

1. In a fuel injection system, a pair of fuel injection pumps, one of said pumps being a master pump and the other of said pumps being a slave pump and controlled through control of said master pump, a fuel delivery line common to both of said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, the plunger of said master pump having a spill port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps.

2. In a fuel injection system, a pair of fuel injection pumps adapted to be mounted to balance the mechanical load on the engine, one of said pumps being a master pump, the other of said pumps being a slave pump and controlled through control of said master pump, a fuel delivery line common to said pumps, a fuel supply line common to said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, said master pump having a spill port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps.

3. In a fuel injection system, a pair of fuel injection pumps, one of said pumps being a master pump and the other of said pumps being a slave pump and controlled through control of said master pump, a fuel delivery line common to both of said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, the plunger of said master pump having a spill port therein and extending below the spill edge of said plunger, said port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps.

4. In a fuel injection system, a pair of fuel injection pumps, one of said pumps being a master pump and the other of said pumps being a slave pump and controlled through control of said master pump, a. fuel delivery line common to both of said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, the plunger of said master pump having a spill port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps and means for controlling the quantity of fuel bypassed through said spill port.

5. In a fuel injection system, a pair of fuel injection pumps adapted to be mounted to balance the mechanical load on the engine, one of said pumps being a master pump, the other of said pumps being a slave pump and controlled through control of said master pump, a fuel delivery line common to said pumps, a fuel supply line common to said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, said master pump having a spill port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps and means for controlling the quantity of fuel bypassed through said spill port.

6. In a fuel injection system, a pair of fuel injection pumps, one of said pumps being a master pump and the other of said pumps being a slave pump and controlled through control of said master pump, a fuel delivery line common to both of said pumps, said pumps each including a bore and a plunger adapted to be reciprocated in said bore, the plunger of said master pump having a spill port therein and extending below the spill edge of said plunger, said port communicating with said common delivery line whereby said spill port will bypass fuel pumped by both pumps and means for controlling the quantity of fuel bypassed through said spill port.

GEORGE B. WOOD, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 1 Date 1,628,657 Dorner May 17, 192 1,976,151 Thaheld Oct. 9, 1934 2,265,997 Bremser Dec- 16, 1941 2,282,562 Cole May 12, 1942 2,296,357 Links et al. Sept. 22, 1942 2,297,511 Volt Sept. 29, 1942 2,360,526 Staples Oct. 17, 1944