GB2200951A - Regulating I.c. engine fuel injection pumps - Google Patents
Regulating I.c. engine fuel injection pumps Download PDFInfo
- Publication number
- GB2200951A GB2200951A GB08802825A GB8802825A GB2200951A GB 2200951 A GB2200951 A GB 2200951A GB 08802825 A GB08802825 A GB 08802825A GB 8802825 A GB8802825 A GB 8802825A GB 2200951 A GB2200951 A GB 2200951A
- Authority
- GB
- United Kingdom
- Prior art keywords
- damping
- control rod
- current
- pulsed current
- accelerator lever
- 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
- 239000000446 fuel Substances 0.000 title claims description 10
- 230000001105 regulatory effect Effects 0.000 title claims description 8
- 238000002347 injection Methods 0.000 title claims description 7
- 239000007924 injection Substances 0.000 title claims description 7
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 claims description 38
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 abstract description 5
- 238000007667 floating Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
-
- 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
- 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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Prevention Devices (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
Movement of the pump control rod 3 is restrained by an electromagnet 17 having its armature 18 or winding 21 directly connected to the rod. The supply of current from a pulse generator 22 is determined by a regulator 25 linked to the accelerator 1. The movable regulator conductor 26 engages a conductor 28 in the lower part-load range and a resistor 29 at a higher load, with no current flow at no and high load. The magnitude or width of the current pulses may be variable. <IMAGE>
Description
Device for regulating an internal combustion engine
The invention relates to a device for regulating an internal combustion engine for a motor vehicle, the device comprising transmitting means adapted to be located between an accelerator lever and a control rod of a fuel injection pump,and comprising a damping device for damping the control rod movement when the accelerator lever is actuated.
A device of this type has been proposed in German
Patent Application P 35 45 939.5. In this case the damping device consists of a hydraulic or mechanical resistance which builds up with the movement of the transmitting means and acts on these means. Damping devices of this type, which are very costly in construction terms, are subject to wear so that their damping action changed in the course of time. Also there can be elasticity and play occurrences between the damping device and the transmitting means of which it engages, as well as between this transmitting means and the control rod serving as.the actual fuel metering element so that, despite the good damping action of the damping device, the control rod can oscillate.This gives rise to great and rapid fluctuations in the fuel feed to the internal combustion engine, resulting in longitudinal jolting of the motor vehicle which reduces comfort.
According to the present invention there is provided a device for regulating an air compressing internal combustion engine for a motor vehicle, the device comprising transmitting means adapted to be located between an accelerator lever and a control rod of a fuel injection pump,and comprising a damping device for damping the control rod movement when the accelerator lever is actuated, wherein the damping device comprises an electromagnet having an exciting winding or armature connected directly to the control rod and which is adapted to conduct a pulsed current having a strength which is variable depending on the position of the accelerator lever.
In the case of the device designed in accordance with the invention the damping device acts directly upon the control rod serving as the fuel metering unit so that oscillations or jerky movements which, by way of a corresponding fuel feed to the internal combustion engine, can result in longitudinal jerking of the motor vehicle, are suppressed. The damping device is extremely simple in construction and above all is not subject to an ageing process which would affect the damping action. The use of a pulsed current to energise the electromagnet ensures the moveability of the control rod, even in the event of a high magnetic flux with its strong damping action.
Preferably, a current regulator adapted to be connected to the accelerator lever is inserted into the pulsed current line leading to the electromagnet and transmits the pulsed current only in the lower part-load range whereas it cuts off the current during idling and in the upper part-load range.This arrangement limits damping action of the damping device, with the aid of simple means, to the load range in which, according to previous experience, longitudinal jolting of the vehicle occurs.
In addition, because of a very rapid movement of the accelerator lever into the upper part-load range the design enables overriding of the damping device and thus instantaneous load absorption of the internal combustion engine.
Preferbly, the pulsed current intensity in the transition from the lower to the upper part-load range does not decrease discontinuously because of the increasing resistance in the current regulator. This makes it possible to achieve a smooth transition in the damping action in a load range in which the full damping force is no longer required to avoid longitudinal jolting of the motor vehicle with certainty.
Preferably, the damping strength of the damping device is adjustable by varying the pulse height and/or pulse length of the pulsed current. This enables the damping action to be adapted simply to suit different regulating devices or friction co-efficients which vary in the course of time between the transmitting means.
An embodiment of the invention will now be described by way of example with reference to the drawing.
The device for regulating an internal combustion engine (not shown in further detail) fitted in a motor vehicle has an accelerator lever 1, a control rod 3 which is built into an injection pump 2 and acts as a direct fuel metering element, and transmitting means 4 which connect these parts to one another.These transmitting means consist essentially of a forcing bar 6 which connects the accelerator lever 1 to a floating lever 5, a guide lever 8 which is rigidly connected to the floating lever 5 and mounted on a common axle 7, an overriding element which is situated between this guide lever and a driving lever 9 and designed in the form of a tension spring 10, a push rod 11 between the driving lever 9 and a mechanical governor 12 on which there is mounted a floating lever 13 on which, in turn, there is mounted on a pivot 14 (not on the end side) a control lever 15 by which the longitudinally displaceable control rod 3 can be actuated via a compensating bar 16. The device so far described is known Per se and is not the subject of the invention.
In order to avoid longitudinal oscillations or jerky movements of the control rod 3 and the associated variable or irregular fuel feed to the internal combustion engine and the resulting longitudinal oscillations of the motor vehicle, an electromagnet 17 consisting essentially of an armature 18 attached to the control rod 3 and an exciting winding 21 mounted in the immediate vicinity thereof on the housing 19 of the injection pump 2 and provided with a core 20 is attached as a damping device to the injection pump 2. This exciting winding can be energised -by a pulsed current generated in a pulse generator 22.
The magnetic flux generated as a result in the armature 18 and core 20 damps movements of the control rod 3 considerably so that oscillations or great jerky movements are suppressed. At the same, because of the cyclic interruption in the magnetic flux the use of the pulsed current permits movement of the control rod 3 even with the pulsed current switched on so that even then adjustment of the control rod 3 is possible. At the same time a movement of the control rod 3 which is delayed by the damping device cannot adversely affect a movement of the accelerator lever 1 because a position difference between these two parts is compensated for by the interposed tension spring 10, as is the case even with the known device, if the mechanical governor 12 of-the-control rod 3 shows a different position from that corresponding to the position of the accelerator lever 1.The damping strength can be adapted in a simple manner to meet requirements by varying the pulse height and/or pulse length of the pulsed current in the pulse generator 22.
A current regulator 25 in the manner of a potentiometer is built into the current line 23, 24 which conducts the pulsed current between the pulse generator 22 and the electromagnet 17. An indicator 26 of the current regulator 25 is rigidly connected to the axle 7 which is the same as the axle 7 of the floating lever 5 and guide lever 8 so that the indicator 26 is rigidly connected to the accelerator lever 1. The indicator 26 to which the current line 24 leading to the electromagnet 17 is connected can slide along a rail 27 which consists of a current conductor 28 and a resistor 29 which is adjacent thereto in the circumferential direction. The current line 23 leading to the pulse generator 22 is connected to the current conductor 28. When the indicator 26 is in the no-load position shown- by dot-and-dash lines, it has not contact at all with the rail 27 so that the pulsed current in the current line 23, 24 is interrupted thereby rendering the electromagnet 17 currentless. In the immediately following lower part-load range, the indicator 26 is in contact with the current conductor 28 so that the pulsed current reaches the electromagnet 17 at its full intensity thereby providing the full damping action on the control rod 3.In the following transitional range between the lower and upper part-load ranges, the indicator 26 is in contact with the resistor 29 so that, with the continuing movement of the indicator 26 in the direction of the full-load position shown by dot-dash lines, the strength of the pulsed current and thus damping action decreases until the pulsed current is interrupted in the upper part-load range up to full load and the damping action is completely cancelled. This makes it possible for a damping force to be exerted on the control rod 3 only in the lower load ranges in which there is a risk of longitudinal jolting of the motor vehicle, whereas the control rod 3 can move freely in the upper load ranges, a continuous transition in the damping action between these load ranges taking place. In addition, this dependence of the damping action of the different load ranges enables a rapid movement of the control rod 3 into the upper load range since the accelerator lever 1 is adjusted very quickly by the vehicle driver into the upper part-load range or to full load so that, with the indicator 26 leaving the rail 27, the electromagnet 17 is rendered currentless even after a very short time. Thus, the full power output of the internal combustion engine can be made available without being impaired by the damping device.
Claims (5)
1. A device for regulating an air compressing internal combustion engine for a motor vehicle, the device comprising transmitting means adapted to be located between an accelerator lever and a control rod of a fuel injection pump,and comprising a damping device for damping the control rod movement when the accelerator lever is actuated. wherein the damping device comprises an electromagnet having an exciting winding or armature connected directly to the control rod and which is adapted to conduct a pulsed current having a strength which is variable depending on the position of the accelerator lever.
2. A device according to Claim 1, wherein a current regulator adapted to be connected to the accelerator lever is inserted into the pulsed current line leading to the electromagnet and transmits the pulsed current only in the lower part-load range whereas it cuts off the current during idling and in the upper part-load range.
3. A device according to Claim 2, wherein the pulsed current intensity in the transition from the lower to the upper part-load range does not decrease discontinuously because of the increasing resistance in the current regulator.
4. A device according to any one of Claims 1 to 3, wherein the damping strength of the damping device is adjustable by varying the pulse height and/or pulse length of the pulsed current.
5. A device for regulating an air compressing internal combustion engine for a motor vehicle, substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3704352A DE3704352C1 (en) | 1987-02-12 | 1987-02-12 | Device for regulating an internal combustion engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8802825D0 GB8802825D0 (en) | 1988-03-09 |
| GB2200951A true GB2200951A (en) | 1988-08-17 |
| GB2200951B GB2200951B (en) | 1990-11-07 |
Family
ID=6320825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8802825A Expired - Fee Related GB2200951B (en) | 1987-02-12 | 1988-02-08 | Device for regulating an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3704352C1 (en) |
| FR (1) | FR2610990B1 (en) |
| GB (1) | GB2200951B (en) |
| IT (1) | IT1215743B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324335A (en) * | 1997-02-06 | 1998-10-21 | Actionform Limited | An in line fuel pump control rack damper |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1918411B1 (en) * | 1969-04-11 | 1970-10-22 | Kloeckner Humboldt Deutz Ag | Centrifugal speed controller for internal combustion engines |
| GB1346307A (en) * | 1970-07-28 | 1974-02-06 | Cav Ltd | Liquid fuel injection pumping apparatus |
| FR2286948A1 (en) * | 1974-10-05 | 1976-04-30 | Cav Ltd | Fuel flow control system for internal combustion engine - has piston damper with resistance decreasing as stroke increases |
| FR2337815A1 (en) * | 1976-01-06 | 1977-08-05 | Citroen Sa | FLOW CORRECTION DEVICE FOR INJECTION PUMP, INJECTION PUMP AND MOTORS EQUIPPED WITH SUCH A DEVICE |
| DE3224748A1 (en) * | 1982-07-02 | 1984-01-05 | Robert Bosch Gmbh, 7000 Stuttgart | SPEED REGULATOR FOR FUEL INJECTION PUMPS |
| DE3425105A1 (en) * | 1984-07-07 | 1986-01-16 | Daimler-Benz Ag, 7000 Stuttgart | METHOD AND DEVICE FOR DAMPING LONG-TERM VIBRATIONS ON A MOTOR VEHICLE |
-
1987
- 1987-02-12 DE DE3704352A patent/DE3704352C1/en not_active Expired
-
1988
- 1988-01-20 IT IT8819138A patent/IT1215743B/en active
- 1988-02-08 GB GB8802825A patent/GB2200951B/en not_active Expired - Fee Related
- 1988-02-10 FR FR888801588A patent/FR2610990B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324335A (en) * | 1997-02-06 | 1998-10-21 | Actionform Limited | An in line fuel pump control rack damper |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3704352C1 (en) | 1987-11-12 |
| IT8819138A0 (en) | 1988-01-20 |
| GB8802825D0 (en) | 1988-03-09 |
| IT1215743B (en) | 1990-02-22 |
| FR2610990A1 (en) | 1988-08-19 |
| FR2610990B1 (en) | 1992-04-10 |
| GB2200951B (en) | 1990-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980208 |