USRE23889E - Fuel injection pump - Google Patents

Description

R. G. SEIAVIER FUEL INJECTION ump 5 Shee ts-Shee t 1 Original Filed June 15, 1952 INVENTOR. "ROBERT G. SEAVE'E AT TO PNEX Oct. 26, 1954 SEAVER Re. 23,889

FUEL INJECTION PUMP I 2 41 F4 9. Z.

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INVENTOR.

ROBERT G. SEAVEE Arroplvgx Q Oct. 26, 1954 SEAVER Re. 23,889

I FUEL INJECTION PUMP Original Filed .June 15, 1952 1 g Sheets-Sheet 4 INVENTOR. ROBE-112T G. sEAvEg 5 Sheets-Sheet 5 Original Filed June 13, 1952 INVENTOR.

Reissued Oct. 26, 1954 Robert G. Seaver, Springfield, Mesa, assignor to Anna Corporation, a corpora- American Bosch tion of New York No. 2,683,445, dated July 13, 1954, Serial No. 93,471, June 13, 1952. Application for reissue August 2. 1954, Serial No. 447,451

Matter enclosed in heavy brackets I1 I appears in the original patent but, forms no part of this reissue specification; matter printed in italics indicates the additions made by reissue.

17 Claims.

1 This invention relates to fuel supply apparatus for internal combustion engines or the like and has particular reference to a new and improved apparatus which is relatively simple, compact and economical in construction and efficient in operation. An object of the invention is to provide a new and improved fuel supply unit which includes a fuel supply pump, a fuel injection pump, governor and fuel distributor, and wherein all of said elements are combined intoa relatively simple, compact, inexpensive unit.

Another object is to provide such a device which is of the spill or bypass type and controls the quantity of fuel delivered by controlling the quantity of fuel bypassed or spilled.

Another object is to provide a device of the type set forth wherein the supply pump, injection pump. governor and fuel distributor are all actuated by the pump drive shaft.

Another object is to provide an apparatus of the type set forth'which is relatively simple to assemble and which allows the replacement of parts which may become worn in use. I

Another object is to provide a new and improved arrangement for controlling the timing of injection. 1

Another object is to provide a fuel injection apparatus of the type set forth having torque control means.

Another object is to provide a new and improved combined fuel metering means, fuel injection pump and fuel distributor.

Another object is to provide a new and improved governor arrangement for fuel injection apparatus which is relatively simple and economical in construction, yet eflicient in operation.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that many changes may be made in the details of construction'and arrangement of parts without departing from 'the scope of the invention as set forth in the accompanying claims, as the preferred form of the invention has been shown and described by way of illustration only.

Referring to the drawings: Fig. 1 is a longitudinal sectional view of a fuel supply apparatus embodying theinvention; Fig. 2 is a sectional view taken on line 2-2 of Fig. I, looking in the direction of the arrows; Fig. 3 is a sectional view taken on line 3-3 of Fig. 1, looking in the direction of the arrows;

Fig. 4 is an end view of the apparatus showing the drive end;

Fig. 5 is an end view of the apparatus showing the distributor end;

Fig. 6 is a fragmentary view showing the torque control arrangement;

Fig. 7 is a fragmentary view showing the injection timing means; and

Fig. 8 is a fragmentary view showing the torque control cam and cam plate.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, the apparatus shown embodying the invention comprises a housing Ill having open ends with one end adapted to be closed by the cover or'end plate II, and the opposite end adapted to be closed by the distributing head II.

The drive shaft It! extends into housing it and is aligned with the pumping and distributing member designated generally at It and drive shaft It is operatively connected to member I by the tongue in groove arrangement Iii or by other suitable means.

On drive shaft is is secured gear it of the supply pump which meshes with gear I! to form the fuel supply pump and said supply pump is adapted to receive fuel through one of the ports Ila. or I! and to deliver fuel through the other of said ports, ports Ila and ii are connected to the supply pump by means of ducts Ill: and lBa respectively depending upon the direction of rotation of drive shaft l3. Outlet port Ila or ID, as the case may be, is connected by a pipe line, not shown, to a suitable filter which in turn is connected through another pipe line, not shown, to the pump inlet port l9 through which fuel is supplied into the housing In which is kept filled with fuel under. supply pressure at all times.

Mounted for sliding movement on drive shaft I3 is collar 20 on which is carried the thrust bearing It and sleeve 20 is adapted to be actuated in one direction by the centrifugal arrangement consisting of the balls 22 and cage members 23.

If desired, instead of the balls and cages shown, pivotable centrifugal weights could be employed. On thrust bearing ii is pivotally mounted yoke 2| to which is pivctally connected governor lever Lever 25 and leg 21 thereof both are provided with pivots 25a mounted for vertical sliding movement in vertical slots 21a in bearing 2!.

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The torque control feature is obtained through cam 28 on leg 11 of lever '25 and cam'plate 29 Y .-for pivoting lever 21 about cam plate is when said cam 28 is in engagement wtih cam plate 29 and thespeed of the engine and pump-drops because of increased load whereby said lever 21 will be pivoted to a portion whereby an additional quantity of fuel will be injected, thus giving increased torque or-lu in power. 7 The member [4 comprises the metering portio 3|, injection pump portion II and distributing portion 32, all of which-may be formed integral operatively connected and adapted to be driven The metering portion II has an axial duet ll communicating with the bore. of the fuel iniection pump, and the distributing portion llhas an axial duct I! also communicating with the bore 34 of the injection pump.

' as shown, or may beformed of separate elements The metering portion III is provided with the T helical groove 36 communicating with the axial duct a through port 81. Surrounding metering portion 3|! isthe sleeve ll having the iillvand spill ports 39, one of which is provided for each of the delivery outlets 4| in the distributing member 32. Sleev I8 is connected to shaft 4| by means of the trio 4! whereby upon rotation of shaft 4] throughcontrol rod I5, longitudinal adjustment of sleeve II on distributing portion 30 is obtained to vary the fuel quantity delivered through control of the quantity of fuel spilled back into the sump in the pump housing.

0n the exterior of sleeve II is provided longitudinal groove 43 in which rides pin 44 which is connected to pivoted lever 45' which is adapted to be pivoted about pivots 46 and which has its free end 41 engaging spring seat 48 for governor te ends springs 48 and II, which have their enga ing spring seat II which eng ges retainer 52. The spring seat ii and the abutting surface of retainer 52 are spherically shaped at 83 to allow self-centering of the seat SI and retainer 52 is provided with the opening 54 to provide access .to spring seat ii to aid the changing of the governor springs 49 and ill, as it allows the insertion of an element to force seat 5| against the pressure of the springs and thereby facilitates removal of seats II and springs 49 and SI.

Lever has a portion ilabutting'sleeve ll and adapted to be moved in one direction, thereby upon movement of sleeve 20 and in the opposite direction by means of governor springs 49 and it. This movement of pin in groove 4! effects pivotal movement of metering member 38, thereby changing the relation between ports 39 and helical groove It to correspondingly change the timing of injection by the apparatus.

The distributing portion 32 is provided with the port 56 adapted to be aligned with the various outlets 40 successively upon rotation of distributor members I! and thereby place the particular outlets in communication with the bore 34 of the injection pump successively, and thereby effect injection into the various combustion chambers successively.

' The imection pump portion 3i comprises a pair of opposed plunger elements 51 in here and adapted to be actuated by internal cam 58 through 4 l inwardly on their pumping strokes by means of suitable lobes on the internal cam '58, one pair of opposed lobes being provided for each injection stroke to be made by the plungers.

The manual control lever 62 is connected to shaft 63 for controlling yoke 24 which controls the setting of lever 25 and thereby provides a manual control 'i'or the pump setting.

I In the operation gf 'thg apparatus, fuel is supplied to the supply pump through port "a and duct "D or port It and duct "a, depending. upon the direction of rotation of drive shaft ll,

as previously described, and fuel is delivered from the other of said ducts and ports through a pipe line to a filter from which. it passes through port ll into the'sump or hollow interior of housing it;

Upon the suction stroke of plungers 81, fuel is supplied to bore 84 of the injection pump through ports 3!, helical groove 36, port 31 and axial duct It.

Upon the pumping stroke of plungers l1, fuel is delivered through axial duct It in distributor I2 and port 58 to one of the outlets until helical groove 16 is aligned with one of the fill and spill ports 39 at which time fuel is spilled .back into the sump of the pump through port II.

This cycleis repeated for each of the outlets 4ll successively to thereby supply fuel under injection pressure to each combustion chamber in Proper sequence The fuel quantity delivered is controlled by the centrifugal governing arrangement through control of the longitudinal position of sleeve ll and port as relative to helical groove is and the timingof injectionof the pump is controlled through the centrifugal. governing arrangement effecting rotational or pivotal movementof sleeve It, as previously described.

If desired. instead of themechanical torque control arrangement shown, a hydraulic torque control arrangement can be obtained by placing a delivery valve in bore or duct 35 of distributor I! and incorporating the torque control feature therein. This also allows the use of3a delivery valve! and the delivery valve 9 can have the torque controlfeature or not, as desired.

It will also be noted that by forming internal cam il with staggered or effect lobes with one plunger leading the other that an arrangement could be provided for use for preinjection, that is, a small. injection before or after the main injection.

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

I claim:

1. In a device of the character described, a

- drive shaft, a rotor having a fuel pumping portion, a fuel metering portion and a fuel distributing portion parallel with and operatively connected to said drive shaft, said metering portion and distributing portion being on opposite sides of said pumping portion, a fuel passage in said rotor connecting said pumping portion with said distributing portion, a delivery valve in said fuel passage, a plurality of outlets communicating with said distributing portion, said pumping portion having a transverse bore communicating with said fuel passage, plunger means mounted for reciprocation in said bore and cam means.

surrounding said pumping portion and adapted cases driveshaft, a rotor having a fuel pumping pordistributing portion, a delivery valve in said fuel passage, a plurality of outlets communicating with said distributing portion, said pumping portion having a transverse bore communicating with said fuel e, plunger means mounted for reciprocation in said bore and cam means surrounding said pumping portion and adapted to effect reciprocation of said plunger means upon rotation of said rotor, said metering portion having high pressure metering means communicating with said pumping portion for controlling the quantity of fuel delivered by said pumping portion; 1

3. In a device of the character described. a drive shaft, a rotor having a fuel injection pump portion, a fuel metering portion and a fuel distributing portionoperatively connected to said drive shaft, said metering portion and distributing portion being on opposite sides of said pumping portion, said injection pump portion having a transverse bore, piston means in said bore, cam means surrounding said piston means for effecting reciprocation of said piston means upon ro-' 7 tation of said rotor, said rotor having a bore connecting said injection pump portion with said fuel metering portion and said fuel distributing portion, a plurality of outlets adapted to communicate successively with said fuel distributing portion, said fuel metering portion including a spill or bypass port and adjustable means for controlling the quantity of fuel spilled or bypassed and providing high pressure metering means for controlling the quantity of fuel delivered by the 4. In a device of the character described, a drive shaft, a rotor having a fuel injection pump portion, a fuel metering portion and a fuel distributing portion operatively connected to said drive shaft, said metering portion and distributing portion being on opposite sides of said pumping portion, said injection pump portion having a transverse bore, piston means in said bore, cam means surrounding said piston means for effecting reciprocation of said piston means upon rotation of said rotor,- said rotor having a bore connecting said iniection pump portion with said fuel metering portion and said fuel distributing portion, a plurality of outlets adapted to comn unicate successively with said fuel distributing portion, said fuel metering portion including a spill or bypass port and adjustable means for controlling the quantity of fuel spilled or bypassed and providing high pressure metering means for controlling the quantity of fuel deliv- Gil ered by the pump and a delivery valve in the fuel path between said pumping portion and said distributing portion.

5. In a device of the character described, a drive shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby,

said rotor being parallel with said drive shaft and having a pumping portion, a distributing portion and a metering portion, said metering portion and distributing portion being on opposite sides of said pumping portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said pumping portion having a transverse bore communicating with said fuel passage and piston means in said bore, cam means adjacent the periphery'of said pumping portion andeifecting reciprocation of said piston means upon rotation of said rotor, a plurality 'of outlets adapted to communicate successively with said distributing portion upon rotation of said rotor. said metering portion providing high pressure metering means communicating with said pumping portion for controlling the quantity of fuel delivered by said pumping portion.

6. In a deviceof the character described, a

driv shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby, said rotor being parallel with said drive shaft and having a pumping portion, a distributing portion and a metering portion, said metering portion and distributing portion being on opposite sides of said pumpin portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said pumping portion having a transverse bore communicating with said fuel passage and piston means in said bore, cam

means adJacent the periphery of said pumping portion and effecting reciprocation of said piston means upon rotation of said rotor, a plurality of outlets adapted to communicate successively with said distributing portion upon rotation of said rotor, said metering portion providing high pressure metering means communicating with said pumping portion for controlling the quantity of fuel delivered by said pumping portion and a delivery valve in the fuel path between said pumping portion and said outlets.

7. In a device of the character described, a

drive shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby, said rotor. being parallel with said drive shaft and having a pumping portion, a distributing portion and a metering portion, said metering portion and distributing portion being on opposite sides of said pumping portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said pumping portion having a transverse bore communicating with said fuel passage and piston means in said bore, cam means adjacent the periphery of said pumping portion and efiecting reciprocation of said piston means upon rotation of said rotor, a plurality of outlets adapted to communicate successively with said distributing portion upon rotation of said rotor, said metering portion providing high pressure metering means communicating with said pumping portion for controlling the quantity of fuel delivered by said pumping portion, said high pressure metering means comprising a bypass port in said rotor communicating with said fuel passage and means for controlling the passage of fuel said bypass port. a

8. In a device of the character described, a drive shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby, said rotor being parallel with said drive shaft and having a pumping portion, a distributing.

tation of said rotor, said metering portion providing high pressure metering means communiaasso eating with said pumping portion for controlling the qu'antity of fuel delivered by said pumping portion, said high pressure metering means comprising a bypass port in said rotor communicating with said fuel passage and means for controlling the passage of fuel through said bypass port comprising a sleeve surrounding said rotor adjacent said bypass port and means for adjusting the relative positions of said sleeve and P rt. A

9. In a device of the character described, a drive shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby, said rotor being parallel with said drive shaft and having a pumping portion, a distributing portion and a metering portion, said metering portionand distributing portion being on opposite sides of said pumping portion, a fuel passage connecting said pump'portion, distributing portion and metering portion, said pumping P rtion having a transverse bore communicating with said fuel a passage and piston means in said bore, cam means adjacent the periphery of said pumping portion and eilecting reciprocation of said piston means fuel delivery by said-pumping portion, said high pressure metering means comprising a bypass port in said rotor communicating with said fuel passage and helical groove means for controlling the passage of fuel through said bypass port.

10. In a device of the character described, a drive shaft, a rotor operatively connected to said drive shaft and adapted to be rotated thereby, said rotor being parallel with said drive shaft and having a pumping portion, a-distrlbuting portion and a metering portion, said metering portion and distributing portion being'on opposite sides of said pumping portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said portion having a transverse bore communicating with said fuel passage and piston means in said pump Portion, said high pressure metering means comprising a bypass. port in said rotor communicating with said'fuel passage and means for controlling the passage of fuel through said obypasportsaidmeansforcontrollingthepassage of fuel through said bypass port comprising a sleeve surrounding said rotor, adjacent said bypass port, said sleeve having a helical slot,

and means for adjusting the relative positions of said sleeve and port.

11. In a device of the character described, a drive shaft, a rotor having a fuel injection pump portion, a fuel meteringportion, and a fuel distributing portion operatively connected to said drive shaft, said infection pump portion having a transverse bore, piston means in said bore, cam means surrounding said piston means for effecting reciprocation of said piston means upon rotation of said rotor, said rotor having u bore connecting said infection pump portion with said fuel metering portion and said fuel dis- Win vortiomu plurality of outlets adapted to communicate successively with said fuel dis tributing portion, said fuel metering portion including a spill or ypass port and udfustgble means for controlling the quantity of fuel spilled or by-pussed and providing high pressure metering means for controlling the quantity of fuel delivered by the pump, said udfustuble means for controlling the quantity of fuel bypassed by the pump being rotatable for controlling the timin of infection by e pump- 12. In a device of the character described, a

drive shaft, a rotor operctively connected to said drive shaft and adopted to be rotated thereby, said rotor being parallel with said drive shgft and having a pumping portion, d'dlstributtng portion and a metering portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said pumping portion having d transverse bore communicating with said fuel passage and piston means in said bore, mm means adjacent the periphery of said pumping portion and effecting reciprocation of said piston means upon rotation of said rotor, a plurality of outlets adapted to communicate successively with said distributing portion upon rotation of said rotor,'sdid metering portion providing high pressure metering means communicating with said pumping portion for controlling the quantity of fuel delivered by said pumping portion, said high pressure metering means comprising a bypass port in sdtd rotor communicating with said fuel passage and means for controlling the passage of fuel through said bypass port comprising a sleeve surrounding said rotor adjacent said bypass port and means for adfueling the relative positions of said sleeve and port and means for rotating said sleeve surrounding sald rotor for controlling the timing of infection by the pump- 13. In a device of the character described, a drive shaft, a rotor operutively connected to said drive shaft and adapted to be rotated thereby,

said rotor being parallel with said drive shaft and having a pumping portion, a distributing portion and g metering portion, a fuel passage connecting said pump portion, distributing portion and metering portion, said pumping portion having a transverse bore communicating with said fuel'passuge and piston means in said bore, cam means adjacent the peripheryof said pumping portion and efiecting reciprocation of said piston means upon rotation of said rotor, is plurality of outlets adapted to communicate successively with said distributing portion upon rotation of said rotor, said metering portion providing high pressure metering means communicdting with said pumping portion for controlling the quantity of fuel delivered by said pumping portion, said high pressure metering means comprising a bypass port in said rotor communicating with said fuel passage and means for controlling the pdssuge of fuel through said bypass port comprising a sleeve surrounding said rotor adjacent said bypass port, said sleeve having a helical slot, and means for adjusting the relative positions of said sleeve and port, said sleeve surrounding said rotor being rotatable for adfasting the timing of infection by the pump.

' IL In a device of the character described, a

drive shaf a rotor having a fuel metering portion and a fuel distributing portion operatively connected to said drive shaft, a fuel passage in said rotor communicating with said distributing portion, a plurality of outlets communicating successively with said distributing portion, an infection pump communicating with said fuel passage and adapted to supply fuel thereto, a port in said rotor and communicating with said fuel passage, a member longitudinally and rotatably adjustable relative to said port for controlling the quantity of fuel delivered to said outlets, and for controlling the timing of infection.

15. In a device of the character described, a drive shaft, a rotor having a fuel metering portion and a fuel distributing portion operatively connected to said drive shaft, a fuel passage in said rotor communicating with said distributing portion, a plurality of outlets communicating successively with said distributing portion, an infection pump communicating with said fuel passage and adapted to supply fuel thereto, a port in said rotor and communicating with said fuelfection pump communicating with said fuel passage and adapted to supply fuel thereto, a bypass port in said rotor and communicating with said fuel passage, a longitudinally and rotatably adfustable member in cooperative relation with said bypass port for controlling the quantity of fuel delivered to said outlets and for controlling the timing of infection.

17. In a device of the character described, a drive shaft, a rotor having a fuel metering portion and a fuel distributing portion operatively connected to said drive shaft, a fuel passage in said rotor communicating with said distributing portion, a plurality of outlets communicating successively with said distributing portion, on infection pump communicating with said fuel passage and adapted to supply fuel thereto, a bypass port in said rotor and communicating with said fuel passage, a longitudinally and rotatably adiustable member having port means in cooperative relation with said bypass port for controlling the quantity of fuel delivered to said outlets and for controlling the timing of infection.

References Cited in the file of this patent or the original patent:

UNITED STATES PATENTS Number Name Date 2,391,221 Beeh Dec. 18, 1945 2,518,473 Hogeman et a]. Aug. 15, 1950 2,622,577 Rebel Dec. 23, 1952 FOREIGN PATENTS Number Country Date- 'l,'l59 Great Britain Sept. 26, 1951

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