GB2161216A - Damping longitudinal vibrations of a motor vehicle during driving - Google Patents

Damping longitudinal vibrations of a motor vehicle during driving Download PDF

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Publication number
GB2161216A
GB2161216A GB08516714A GB8516714A GB2161216A GB 2161216 A GB2161216 A GB 2161216A GB 08516714 A GB08516714 A GB 08516714A GB 8516714 A GB8516714 A GB 8516714A GB 2161216 A GB2161216 A GB 2161216A
Authority
GB
United Kingdom
Prior art keywords
longitudinal vibrations
actuator
during driving
control
fuel
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
Application number
GB08516714A
Other versions
GB2161216B (en
GB8516714D0 (en
Inventor
Frank Thoma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of GB8516714D0 publication Critical patent/GB8516714D0/en
Publication of GB2161216A publication Critical patent/GB2161216A/en
Application granted granted Critical
Publication of GB2161216B publication Critical patent/GB2161216B/en
Expired legal-status Critical Current

Links

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
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires

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)
  • Vibration Prevention Devices (AREA)

Abstract

Damping of longitudinal vibrations of a motor vehicle while being driven is achieved by combining a damping device 2 with the control linkage of the fuel injection pump governor 1. The device 2 includes an acceleration sensor 4, a signal phase shifter 5 and an actuator 7, Fig. 2, which operates on one end of a control lever 11 of the fuel injection pump governor 1. When longitudinal vibrations of the vehicle are detected by the sensor 4 the actuator 7 moves the end of lever 11 from its inoperative position to its operative position. As soon as the vibrations are damped, the actuator 7 returns the end of lever 11 to its inoperative position. <IMAGE>

Description

Method and device for damping longitudinal vibrations on a motor vehicle during driving The invention relates to a method for damping longitudinal vibrations on a motor vehicle during driving and to a device for carrying out this method.
It is generally known that strong longitudinal vibrations, i.e., periodic fluctuations in speed which are damped only slowly or not at all, occur on motor vehicles during driving when there are rapid changes in the accelerator pedal position within specific operating ranges and considerably affect the comfort of the vehicle occupants. The reason for this is the rotating mass in the internal combustion engine vibrating against the vehicle mass via the flexibility of the drive and tyres in conjunction with a specific speed-torque characteristic of the internal combustion engine.
A superimposed torque influence which counteracts longitudinal vibrations during driving is known in injection systems equipped with electronic control systems for self-igniting injection-type internal combustion engines (German Offenlegungsschrift 28 03 750). This influence is integrated in the injection system and combined with the numerous other electronic components of these control systems.
The present invention seeks to provide a device for a mechanical control system which is simple in construction and which can be readily fitted on conventional fuel metering devices and which, moreover, counteracts longitudinal vibrations most effectively and enables them to be damped rapidly.
According to the present invention there is provided a device for damping longitudinal vibrations which occur driving on a motor vehicle driven by an internal combustion engine having a fuel metering means, comprising an acceleration sensor which records the longitudinal vibrations and a phase shifter which counteracts the longitudinal vibrations with a vibration value T and the control signal of which influences an actuator cooperating with the fuel metering means, the actuator is formed by a lifting magnet which, as part of the fuel metering means, acts upon a control linkage of a fuel feed control device and which is moved from an inoperative position into an operative position upon the occurrence of longitudinal vibrations during driving.
Preferably, the fuel feed control device has a control lever connected at one end to a control rod of a fuel delivery means and supporting at the other end on a spring-loaded supporting element for fullload settings, the actuator being operatively connected to the supported element.
The acceleration sensor, phase shifter and the actuator are preferably combined in one modular unit.
The damping device may be fitted simply in current vehicle or internal combustion engine designs and, in addition, may also be fitted retroactively in an equally simple manner on vehicles which have been in prolonged operation.
Simple mounting is possible because the damping device can be connected as a modular unit to the operating point of the actuator owing to the independent placing of the acceleration sensor. In addition, it is possible to provide the damping device with a phase shifter which is specific to the vehicle and which impresses on the signal of the acceleration sensor, which measures longitudinal vibrations during driving or absolute movements, a phase shift for optimum damping, the value of which has been previously determined on a testing bench and has a definite vibration value the thus processed signal being transmitted as an output signal to the actuator.
German Offenlegungsschrift 1 962 540 disclosed a damping device which is mounted on the housing of the fuel injection pump, but has a brake shoe which bears against a longitudinal side face of the control rod and serves to prevent variations in the control displacement. When the internal combustion engine is operated with a power proportional to the operating oil pressure and thus approximately proportional to the operating speed of the internal combustion engine, the brake shoe is pressed constantly against the control rod.
An exemplary embodiment of the invention is shown in the drawing and described in more detail below. In the drawing: Fig. 1 shows a functional diagram of an injection pump governor having a supporting element on which the damping device according to the invention engages, and Fig. 2 shows a block diagram of the damping device.
Operation -- independent from the accelerator pedal - of the control linkage of an injection pump governor 1 provided for an air-compression injection-type internal combustion engine is shown in Fig. 1. The damping device, which is designated by reference numeral 2 and is combined in one modular unit, is arranged on the cover of the unmodified mechanical governor 1 and requires only one voltage feed line 3 from the vehicle's system as the single cable connection.
The block diagram shown in Fig. 2 contains individual blocks, of which the first block 4 corresponds to the acceleration sensor for measuring longitudinal vibrations during driving.
The sensor signals are each delayed in the following block 5, a phase shifter with a high-pass filter, that is by a vibration value T for optimum damping, which value has been previously determined in a test on an identically designed vehicle.
The signals which are present following the phase shift are transmitted as suitable control signals directly to an actuator 7.
The actuator 7 is in the form of a lifting magnet which is moved from one end position, corresponding to the inoperative position, into another end position corresponding to an operative position by a control signal from the phase shifter upon the occurrence of longitudinal vibrations. As soon as the longitudinal vibrations are damped, the lifting magnet moves back again into its end position corresponding to the inoperative position.
As can be seen from Fig. 1, the lifting magnet 7 is operatively connected to a spring-loaded supporting element 8 which is located in the governor 1 and provided for full-load setting. Little power is required in this case since it is essentially only the force of a play compensating spring 9 that is exerted on the control linkage. In opposition to the force of a return spring 10 via a control lever 11, the lifting magnet 7 forces the control rod 12to move impulsively to provide a smaller injected quantities.
In the control linkage of the injection pump governor 11 the centrifugal weight arrangement is designated by reference numeral 13, a reversing lever by reference numeral 14 and guide and adjusting levers by reference numerals 15 and 16, respectively. Load input is effected by the adjusting or floating lever 16.
It is also possible for the control signals to be transmitted not directly to the actuator 7, but to the block 6, a comparator, as shown in Figure 7. In this comparator the control signals are compared with a threshold value, digitized and converted into a digital value and, finally control signals from the comparator are transmitted as control or switch signals to the block 7, i.e., to the actuator.
The maximum amplitude generated by the actuator is only a small part of the maximum range of the engine so that driving safety is not affected in the event of a malfunction of the damping device.

Claims (5)

1. A device for damping longitudinal vibrations which occur during driving on a motor vehicle driven by an internal combustion engine having a fuel metering means, comprising an acceleration sensor which records the longitudinal vibrations and a phase shifter which counteracts the longitudinal vibrations with a vibration value T and the control signal of which influences an actuator cooperating with the fuel metering means, the actuator is formed buy a lifting magnet which, as part of the fuel metering means, acts upon a control linkage of a fuel feed control device and which is moved from an inoperative position into an operative position upon the occurrence of longitudinal vibrations during driving.
2. A device according to claim 1, wherein the fuel feed control has a control lever connected at one end to a control rod of a fuel delivery means and supported at the other end on a spring-loaded supporting element for full-load settings, the actuator being operatively connected to the supporting element.
3. A device according to claims 1 or 2, wherein the acceleration sensor, the phase shifter and the actuator are combined in one modular unit.
4. A device according to claim 1, 2 or 3 wherein the fuel delivery means comprises an injection pump and the fuel feed control device comprises an injection pump governor.
5. A device for damping longitudinal vibrations which occur during driving on a motor vehicle driven by an internal combustion engine, substantially as described herein with reference to and as illustrated in the accompanying drawing.
GB08516714A 1984-07-07 1985-07-02 Damping longitudinal vibrations of a motor vehicle during driving Expired GB2161216B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843425105 DE3425105A1 (en) 1984-07-07 1984-07-07 METHOD AND DEVICE FOR DAMPING LONG-TERM VIBRATIONS ON A MOTOR VEHICLE

Publications (3)

Publication Number Publication Date
GB8516714D0 GB8516714D0 (en) 1985-08-07
GB2161216A true GB2161216A (en) 1986-01-08
GB2161216B GB2161216B (en) 1988-02-03

Family

ID=6240104

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08516714A Expired GB2161216B (en) 1984-07-07 1985-07-02 Damping longitudinal vibrations of a motor vehicle during driving

Country Status (4)

Country Link
DE (1) DE3425105A1 (en)
FR (1) FR2567196B1 (en)
GB (1) GB2161216B (en)
IT (1) IT1185200B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250873A2 (en) * 1986-06-27 1988-01-07 Hella KG Hueck &amp; Co. Automotive vehicle driving speed adjustment device
FR2610990A1 (en) * 1987-02-12 1988-08-19 Daimler Benz Ag CONTROL DEVICE OF AN INTERNAL COMBUSTION ENGINE
EP0297288A2 (en) * 1987-06-27 1989-01-04 Robert Bosch Gmbh Fuel injection pump for feeding the combustion chamber of an automotive engine
GB2208410A (en) * 1987-08-01 1989-03-30 Ford Motor Co Control of i.c. engine fuel quantity or ignition timing to suppress vehicle drive train oscillations
EP0332119A2 (en) * 1988-03-09 1989-09-13 Hitachi, Ltd. Electronic-type engine control method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626961C1 (en) * 1986-08-08 1993-06-24 Daimler-Benz Ag, 7000 Stuttgart, De
DE3644155C1 (en) * 1986-12-23 1988-07-21 Daimler Benz Ag Device for damping driving vibrations on a motor vehicle
US4928652A (en) * 1987-09-17 1990-05-29 Mazda Motor Corporation Engine control system for suppressing car body vibration
DE3838502C1 (en) * 1988-11-12 1990-04-26 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Device for the damping of longitudinal drive vibrations of a motor vehicle
DE3842308C1 (en) * 1988-12-16 1990-06-13 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4021839C1 (en) * 1990-07-09 1991-06-20 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Speed regulator for vehicle fuel injection pump - has two part compensating link between lever and volume adjuster
DE102005021415A1 (en) * 2005-05-10 2006-11-16 Zf Friedrichshafen Ag Method for damping of longitudinal oscillations of fluids in vehicle transporting containers entails feeding of antiphase control signal to influencing unit corresponding to antiphase moment to influence engine or braking torque

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605905C (en) * 1930-12-10 1934-11-20 Sulzer Akt Ges Geb Control device for internal combustion engines with variable operating speed, especially for vehicles
JPS5115885Y2 (en) * 1971-11-18 1976-04-26
CA1033035A (en) * 1972-04-24 1978-06-13 William R. Seitz Surge sensory apparatus for a prime mover
FR2268949A1 (en) * 1974-04-24 1975-11-21 Sigma Diesel Fuel injection pump for I.C. engine - having control link with engine speed to regulate fuel supply
US4136657A (en) * 1976-10-21 1979-01-30 Nippondenso Co., Ltd. Electric control system for diesel engine
JPS53148839A (en) * 1977-05-31 1978-12-25 Matsushita Electric Works Ltd Rainwater recovering device
DE2803750A1 (en) * 1978-01-28 1979-08-02 Bosch Gmbh Robert PROCEDURE AND EQUIPMENT FOR FUEL MEASUREMENT IN COMBUSTION ENGINE
DE2902731A1 (en) * 1979-01-25 1980-08-07 Bosch Gmbh Robert SPEED REGULATOR FOR INJECTION INTERNAL COMBUSTION ENGINES, IN PARTICULAR CENTRIFUGAL SPEED REGULATOR OF AN INJECTION PUMP FOR VEHICLE DIESEL ENGINES
DE2906782A1 (en) * 1979-02-22 1980-09-04 Bosch Gmbh Robert DEVICE FOR DAMPING VIBRATION VIBRATIONS IN AN INTERNAL COMBUSTION ENGINE
US4296718A (en) * 1979-09-17 1981-10-27 General Motors Corporation Diesel engine shutdown control system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250873A2 (en) * 1986-06-27 1988-01-07 Hella KG Hueck &amp; Co. Automotive vehicle driving speed adjustment device
EP0250873A3 (en) * 1986-06-27 1988-11-09 Hella Kg Hueck & Co. Automotive vehicle driving speed adjustment device
FR2610990A1 (en) * 1987-02-12 1988-08-19 Daimler Benz Ag CONTROL DEVICE OF AN INTERNAL COMBUSTION ENGINE
EP0297288A2 (en) * 1987-06-27 1989-01-04 Robert Bosch Gmbh Fuel injection pump for feeding the combustion chamber of an automotive engine
EP0297288A3 (en) * 1987-06-27 1989-08-09 Robert Bosch Gmbh Fuel injection pump for feeding the combustion chamber of an automotive engine
GB2208410A (en) * 1987-08-01 1989-03-30 Ford Motor Co Control of i.c. engine fuel quantity or ignition timing to suppress vehicle drive train oscillations
GB2208410B (en) * 1987-08-01 1991-07-17 Ford Motor Co Engine calibration
EP0332119A2 (en) * 1988-03-09 1989-09-13 Hitachi, Ltd. Electronic-type engine control method
EP0332119A3 (en) * 1988-03-09 1990-03-14 Hitachi, Ltd. Electronic-type engine control method

Also Published As

Publication number Publication date
GB2161216B (en) 1988-02-03
GB8516714D0 (en) 1985-08-07
FR2567196B1 (en) 1988-09-09
FR2567196A1 (en) 1986-01-10
IT8521461A0 (en) 1985-07-05
DE3425105C2 (en) 1988-03-17
DE3425105A1 (en) 1986-01-16
IT1185200B (en) 1987-11-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940702