GB2195472A - A fuel injection pump for internal combustion engines - Google Patents
A fuel injection pump for internal combustion engines Download PDFInfo
- Publication number
- GB2195472A GB2195472A GB08722515A GB8722515A GB2195472A GB 2195472 A GB2195472 A GB 2195472A GB 08722515 A GB08722515 A GB 08722515A GB 8722515 A GB8722515 A GB 8722515A GB 2195472 A GB2195472 A GB 2195472A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- adjusting
- injection pump
- fuel injection
- governor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
- F02M41/125—Variably-timed valves controlling fuel passages
- F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/04—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors
- F02D1/045—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors characterised by arrangement of springs or weights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
- F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
A fuel injection pump for a motor vehicle internal combustion engine has an adjusting device for a fuel quantity-adjusting member (16), which device has a two-arm adjusting lever (18) and a governor lever (22) which is acted upon by a governor spring (24) and a centrifugal adjuster (30). In order to keep the degree of irregularity small during idling operation of the internal combustion engine, the idling spring (44) acts on the adjusting lever (18) independently of the governor spring (24). The adjusting lever (18), which may be adjusted by a small amount of force, is also acted upon by a stop (46), which is controlled by air pressure, load pressure, temperature or similar parameters, and possibly also a damping device. <IMAGE>
Description
SPECIFICATION
A fuel injection pump for internal combustion engines
The present invention relates to a fuel injection pump for internal combustion engines.
German Offenlegungsschrift No.35 00 341 discloses a fuel injection pump in which an idling spring, one end of which is securely adjustably disposed on the governor housing, acts alternately on a tensioning lever, which is acted upon by the stronger governor spring, or on the starting lever, which is influinced by the centrifugal timer and which is coupled, as an adjusting lever, to the quantity-adjusting member.Since, in idling operation, during which a relatively low rotational speed has to be maintained, the adjusting forces exerted by the governor spring and the centrifugal timer are substantially greater than the adjusting force of the idling spring, the irregularity (P) of the change in delivery quantity with respect to the rotational speed is high, so that the differences in the characteristics determining the idling speed have a relatively strong effect on the level of the idling speed.
According to the present invention there is provided a fuel injection pump for internal combustion engines including a fuel quantityadjusting member for determining the quantities of fuel to be injected, and a speed governor for actuating the quantity-adjusting member, the speed governor having a lever arrangement comprising an adjusting lever coupled to the quantity-adjusting member and a governor lever which has a common fulcrum with and is cooperable with said adjusting lever, whereby the lever arrangement is acted upon by a governor wherein a governor spring arrangement, which serves as the control criterion for the speed of the internal combustion engine, and a centrifugal adjuster act upon the governor lever and an idling spring, one end of which is fastened to the housing, acts upon the adjusting lever which is cooperable with said governor lever.
The fuel injection pump according to the present invention has the advantage that by separating the forces exerted by the idling spring and by the governor spring in the centrifugal timer, onto different levers, with the idling spring acting on the adjusting lever for the quantity-adjusting member, said member
may be adjusted by a relatively small force.
As a result, an idling spring with soft spring characteristics may be provided. Furthermore, the idling spring, one end of which is fastened to the housing, may be relatively simply adjusted, so that the idling speed may be regu
lated in a simple manner. Moreover, more sta
ble full-load curves are obtained, since there is
no change in the force on the adjusting lever
in excess of the rotational speed. Also, there
is no play at the bearing point of the lever.
Since the adjusting lever is biassed only by the relatively soft idling spring, in order to increase the delivery quantity, the injection pump preferably comprises an adjustable stop which projects into the pivot path of the adjusting lever and the position of which is determined by the operating parameters of the internal combustion engine. This produces the advantage that the adjustable stop can be driven by a structurally small adjuster, which requires a small force, to correct the full-load quantity in dependence upon atmospheric air pressure, load pressure, temperature or similar operating parameters.
Furthermore, coupling the adjusting lever to a damping device may advantageously effectively prevent the motor vehicle jolting in the event of rapid changes in load.
The invention is described further hereinafter, by way of example only, with reference to the accompanying drawings in which:
Fig. 1 is a simplified section through a first embodiment of a fuel injection pump in accordance with the present invention having an adjusting device; and
Fig. 2 is a simplified side view of a second embodiment of an adjusting device of a fuel injection pump in accordance with the present invention.
A pump piston 3 operates in a cylinder bore 2 in a housing 1 of a fuel injection pump and is moved in a reciprocating and simultaneously rotating manner by a drive (not shown). The pump working chamber 4 of this pump unit is provided with fuel from a suction chamber 7 in the housing 1 during the suction stroke of the pump piston 3 by way of longitudinal grooves 5 disposed in the outer surface of the pump piston and by way of a passage 6 in the housing 1.During the compression stroke of the pump piston 3, fuel is delivered from the pump working chamber 4 into a longitudinal passage 8 in the pump piston 3, from where it is fed by way of a distributortype longitudinal groove 10 according to the angular position of the pump piston 3 into one of the delivery lines 11, which are disposed about the periphery of the cylinder bore 2 in correspondance with the number of cylinders to be supplied in the internal combustion
engine.
An annular control spool 16 is displaceably
mounted on the pump piston 3 and opens a
radial bore 17, which is connected to the
longitudinal passage 8, during the compression stroke of the pump piston 3, thus producing a
direct connection between the working cham
ber 4 and the suction chamber 7, such that, from the instant of opening, none of the re
mainder of the fuel delivered by the pump
piston 3 is fed to the delivery lines 11. De
pending on the position of the annular spool
16, the connection to the suction chamber 7
is opened at an earlier or later point during the compression stroke of the pump piston, and the delivery of fuel is interrupted. The further the annular spool 16 is moved towards the top of the pump piston 3, the greater the quantity of fuel delivered by the pump piston into the delivery lines 11 and to the injection nozzles (not shown).
The position of the annular spool 16 is adjusted by a two-arm adjusting lever 18, also called a quantity lever, which is pivotable about an axle 19 and which has a head 20 on one of its ends which projects into a recess 21 in the annular spool 16. For adjusting purposes, the axle 19 may be displaced substantially parallel with the axis of the pump piston 3. To allow for this, the axle 19 is disposed on an adjusting rocker 12 which is pivotally mounted in the housing 1 and which is held in a predetermined position by a pressure spring
13 and an adjusting screw 14.
A one-arm gbvernor lever 22, also calied a tensioning lever, is also pivotable about the axle 19. This governor lever 22 is acted upon following a certain idle travel by a governor spring 24, one end of which is attached to a speed-adjusting lever 25, the other end passing through a bore 26 on the outer end of the lever 22 and being provided with a stop disc 27. An adjusting sleeve 29 of a centrifugal adjuster 30 acts on the lever 22 in the opposite direction to the action of the governor spring 24. The centrifugal adjuster 30 is driven by a transmission (not shown) in accordance with the rotational speed of the pump piston drive. It has a plurality of flyweights 33, which are located in a housing 32 and which have lugs 34 which act upon the lower edge of the adjusting sleeve 29, which is displaceable on an axle 35 in the longitudinal direction.A stop 36, which is fixed to the housing, limits the pivoting motion of the lever 22 in the direction of the centrifugal adjuster 30.
The second arm 40 of the adjusting lever 18 extends alongside the governor lever 22.
On its side facing lever 22, it has a stop 41 which, when the fuel injection pump is at a standstill, is at a distance a from the lever 22.
The end of the arm 40 forks into two parts 42,43. An idling spring 44, which is softer than the governor spring 24, is attached to one part 42. The other end of the idling spring 44 is attached to an adjusting lever 45, which is rotatably and fixably mounted in the housing 1 and which can be used to adjust the idling speed.
A stop 46 is connected to a known pneumatic, hydraulic or electric adjusting mechanism or adjusting drive 47, which is controlled in dependence upon various operating parameters of the internal combustion engine such as atmospheric air pressure, load pressure, temperature or the like. In another embodiment shown in Fig. 1, the stop 46 is part of a fork 48, which is disposed on an adjusting rod 49 of the adjusting drive 47, in which fork a pressure spring 59 presses the part 43 of arm 40 against the stop 46 to compensate for any play. Depending on the extent to which correction of delivery quantity is required, the stop 46 is moved by the adjusting drive 47 into a position in which the pivotal travel of the adjusting lever 18 and hence the magnitude of the delivery quantities is limited to a greater or lesser extent.
A damping device 50 may be connected by way of a rod 57 to the second part 43 of the arm 40 of the adjusting lever 18 in addition to, or in replacement of, the adjustable stop 46. The aim of said rod 57 being to prevent rapid adjusting movements of the adjusting lever 18. The damping device 50 includes a piston 52, housed in a cylinder 51, and through which the rod 57 penetrates and which is held between a head 53 on the free end of the rod 57 and a pressure spring 54 resting on the part 43. One end of the piston 52 is subjected to the pressure of the fuel in the suction chamber 7 and the other end is connected to the suction chamber 7 by way of a throttle bore 55 and a non-return valve 56, contained in the piston 52 and which closes the throttle bore 55 in one direction.
As a result of the piston 52, which is held so as to yield in one direction, and the non-return valve 56, the damping device 50 acts in one direction only, such that when the rod 57 is displaced in one direction the piston 52 moves rapidly, and when it is displaced in the other direction, the piston 52 moves slowly.
In addition, it is pointed out that the damping device 50 described above, which acts in one direction only, may be replaced, if required, by a known damping device acting in two directions.
When the injection pump is in certain positions, or in the event of high acceleration forces, it may be necessary to increase the holding force of the adjusting lever 18. To do so, a pressure spring 31, which is supported between a shoulder 37 on the axle 35 and a shoulder 38 on the sleeve, acts on the adjusting sleeve 29 of the centrifugal timer 30. If such a pressure spring 31 is provided, the strength of the idling spring 44 should be increased accordingly.
The adjusting device of the above-described fuel injection pump operates as follows:
On starting, the adjusting device for the control spool 16 takes up the position shown in Fig. 1. The governor lever 22 abuts against the adjusting sleeve 29 of the centrifugal adjuster 30 and is loosely held by the governor spring 24 such that it is at a distance b from the stop disc 27 and at a distance a from the stop 41 of the adjusting lever 18. The adjusting lever 18 is held by the idling spring 44 in a position in which the control spool 16 is in its highest position which corresponds to the maximum quantity of fuel being injected. Following starting, the adjusting sleeve 29 is dis placed, with increasing engine speed, so that the lever 22 comes into abutment with the stop 41 of the adjusting -lever
18.As the speed continues to increase, the idling spring 44 abutting against the adjusting lever 18 begins to control the lever movement. It counter-balances the force generated by the centrifugal adjuster 30, whereby the control spool 16 is held in apposition determining the idling speed. At speeds above the idling range, the lever 22 moves through the distance b to the stop disc 27 such that the lever 22 is in abutment against the stop disc 27 of the governor spring 24.
In order to increase the rotational speed in the part-load or full-load operation of the internal combustion engine, the governor spring 24 is tensioned by way of the speed-adjusting lever 25, so that the lever 22 is pivoted against the force of the centrifugal adjuster 30. The adjusting, lever 18, which has been jointly guided therewith, moves the control spool 16 into a position for greater quantities of injected fuel. The size of the quantities of injected fuel can, as mentioned above, be limited by the adjustable stop 46 of the adjusting drive 47 in dependence upon various operating parameters of the internal combustion engine.
In the event of a rapid change to the position of the speed-adjusting lever 25 by the driver or in the event of a rapid change in load, a so-called abrupt applicaiton of load, which causes the force of the centrifugal adjuster 30 to be altered, the position of the governor lever 22 is rapidly adjusted, but the position of the adjusting lever 18,which is coupled to the damping device 50, is altered after a certain time delay, so that the quantity of fuel to be injected is also adjusted after a delay.As a result of the damping device 50, which acts in one direction only, given a sudden increase in the rptational speed effected by the centrifugal adjuster 30, the adjusting lever 18 is rapidly adjusted by the lever 22, since the head 53 of the rod 57, which is connected to the adjusting lever 18, can lift off the piston 52 against the force of the pressure spring 54, whereby the adjusting lever 18 moves the control spool 16 into a position for a somewhat lower quantity of fuel to be injected. In contrast, the damping device 50, which is controlled by the throttle bore 55, acts against rapid adjustment of the adjusting lever 18 and the control spool 16 in the event of rapid tensioning of the governor spring 24 or of a rapid reduction in rotational speed.As already mentioned above, a damping device which acts in two directions enables changes in the quantity of fuel to be injected to be delayed with respect to time in the event of either an increase or a decrease in the rotational speed. As a result of the fact that the damping device 50 is coupled to the adjusting lever 18, which is subjected to small forces only, for example the idling spring 44, which is attached so as to be fixed to the housing, the response time of the damping device 50 is substantially constant throughout the entire speed range.
The embodiment of the adjusting device in
Fig. 2 is constructed and operated in substantially the same way as the one in Fig. 1. It should be noted that the damping device 50 of Fig. 2 and the adjustable stop 46 of the adjusting drive 47 of Fig. 1 may both be incorporated into a common fuel injection pump.
The governor spring 24, in addition to its attachment to the governor lever is also resiliently coupled to the adjusting lever 18. A pin 60 is attached to one end of the governor spring 24 and penetrates through the bore 26 in the governor lever 22 and a bore 61 in the adjusting lever 18, which is aligned with said bore 26, and its head 62 holds a soft intermediate spring 64 by way of a spring abutment plate 63, the spring 64 being located between said spring abutment plate 63 and the adjusting lever 18. The stop disc 27 for the lever 22 is also secured to the shaft of the pin 60. The intermediate spring 64 is intended to compensate for the play between the adjusting lever 18 and the governor lever 22.
Claims (8)
1. A fuel injection pump for internal combustion engines inlcuding a fuel quantity-adjusting member for determining the quantities of fuel to be injected, and a speed governor for actuating the quantity-adjusting member, the speed governor having a lever arrangement comprising an adjusting lever coupled to the quantity-adjusting member and a governor lever which has a common fulcrum with and is cooperable with said adjusting lever, whereby the lever arrangement is acted upon by a governor wherein a governor spring arrangement, which serves as the control criterion for the speed of the internal combustion engine, and a centrifugal adjuster act upon the governor lever and an idling spring, one end of which is fastened to the housing, acts upon the adjusting lever which is cooperable with said governor lever.
2. A fuel injection pump as claimed in claim
1, wherein the idling spring arrangement can be regulated by way of an adjustable member.
3. A fuel injection pump as claimed in claim
1 or 2, wherein an adjustable stop, which limits the pivoting movement of the adjusting lever, which is acted upon by the idling spring arrangement in the direction for increasing the quantity of fuel delivered, projects into said pivot path and its position is determined by the operating parameters of the internal combustion engine.
4. A fuel injection pump as claimed in claim 3, wherein the stop is acutated by a hydraulic, pneumatic or electric adjusting drive.
5. A fuel injection pump as claimed in any of claims 1 to 4, wherein a damping device also acts on the adjusting lever.
6. A fuel injection pump as claimed in claim 5, wherein the damping device has a hydraulic damping piston which is subjected to the internal pressure of the fuel injection pump and which has a throttle bore with an excess-pressure valve connected downstream thereof.
7. A fuel injection pump as claimed in claim 5 or 6, wherein the damping device has a damping effect in both directions of adjustment.
8. A fuel injection pump substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863632538 DE3632538A1 (en) | 1986-09-25 | 1986-09-25 | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8722515D0 GB8722515D0 (en) | 1987-10-28 |
| GB2195472A true GB2195472A (en) | 1988-04-07 |
| GB2195472B GB2195472B (en) | 1990-08-29 |
Family
ID=6310297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8722515A Expired - Lifetime GB2195472B (en) | 1986-09-25 | 1987-09-24 | A fuel injection pump for internal combustion engines |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6390631A (en) |
| DE (1) | DE3632538A1 (en) |
| FR (1) | FR2604483B1 (en) |
| GB (1) | GB2195472B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990007643A1 (en) * | 1988-12-31 | 1990-07-12 | Robert Bosch Gmbh | Distributor fuel-injection pump for internal combustion engines |
| EP0515816A1 (en) * | 1991-05-27 | 1992-12-02 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| GB2266601A (en) * | 1992-05-02 | 1993-11-03 | Lucas Ind Plc | Governor mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2632591B2 (en) * | 1990-08-23 | 1997-07-23 | 株式会社クボタ | Two-lever governor with automatic fuel start-up function for diesel engines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2042072A (en) * | 1979-01-25 | 1980-09-17 | Bosch Gmbh Robert | Speed governors for fuel injection internal combustion engines |
| GB2043296A (en) * | 1979-02-08 | 1980-10-01 | Bosch Gmbh Robert | Speed governors for fuel injection type internal combustion engines |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6907795A (en) * | 1968-05-27 | 1969-12-01 | ||
| US4176642A (en) * | 1977-12-20 | 1979-12-04 | Deere & Company | Diesel engine starting control |
| JPS591068Y2 (en) * | 1979-04-12 | 1984-01-12 | 日産自動車株式会社 | Governor device for distributed fuel injection pump |
| DE3147701A1 (en) * | 1981-12-02 | 1983-06-16 | Robert Bosch Gmbh, 7000 Stuttgart | CONTROL DEVICE FOR A FUEL FLOW ADJUSTMENT MEMBER OF A FUEL INJECTION PUMP |
| JPS58107820A (en) * | 1981-12-21 | 1983-06-27 | Nippon Denso Co Ltd | Injection quantity adjusting device of fuel injection pump |
| DE3500341A1 (en) * | 1984-07-13 | 1986-01-16 | Robert Bosch Gmbh, 7000 Stuttgart | SPEED REGULATOR FOR FUEL INJECTION PUMPS |
-
1986
- 1986-09-25 DE DE19863632538 patent/DE3632538A1/en not_active Ceased
-
1987
- 1987-05-25 FR FR8707312A patent/FR2604483B1/en not_active Expired - Lifetime
- 1987-05-29 JP JP13196387A patent/JPS6390631A/en active Pending
- 1987-09-24 GB GB8722515A patent/GB2195472B/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2042072A (en) * | 1979-01-25 | 1980-09-17 | Bosch Gmbh Robert | Speed governors for fuel injection internal combustion engines |
| GB2043296A (en) * | 1979-02-08 | 1980-10-01 | Bosch Gmbh Robert | Speed governors for fuel injection type internal combustion engines |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990007643A1 (en) * | 1988-12-31 | 1990-07-12 | Robert Bosch Gmbh | Distributor fuel-injection pump for internal combustion engines |
| US5138998A (en) * | 1988-12-31 | 1992-08-18 | Robert Bosch Gmbh | Distribution-type fuel injection pump for internal combustion engines |
| EP0515816A1 (en) * | 1991-05-27 | 1992-12-02 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| GB2266601A (en) * | 1992-05-02 | 1993-11-03 | Lucas Ind Plc | Governor mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8722515D0 (en) | 1987-10-28 |
| GB2195472B (en) | 1990-08-29 |
| FR2604483A1 (en) | 1988-04-01 |
| FR2604483B1 (en) | 1991-08-23 |
| DE3632538A1 (en) | 1988-03-31 |
| JPS6390631A (en) | 1988-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930924 |