GB2184487A - Accelerator mechanism for a motor vehicle i.c. engine - Google Patents

Accelerator mechanism for a motor vehicle i.c. engine Download PDF

Info

Publication number
GB2184487A
GB2184487A GB08630801A GB8630801A GB2184487A GB 2184487 A GB2184487 A GB 2184487A GB 08630801 A GB08630801 A GB 08630801A GB 8630801 A GB8630801 A GB 8630801A GB 2184487 A GB2184487 A GB 2184487A
Authority
GB
United Kingdom
Prior art keywords
spring
accelerator pedal
regulating
accelerator
damper
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.)
Withdrawn
Application number
GB08630801A
Other versions
GB8630801D0 (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 GB8630801D0 publication Critical patent/GB8630801D0/en
Publication of GB2184487A publication Critical patent/GB2184487A/en
Withdrawn legal-status Critical Current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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Abstract

The transmission between the accelerator pedal 1 and the power output control, e.g. an injection pump control lever 4, includes a damper 7 and a preloaded spring 11 which is compressed when the pedal is depressed rapidly but provides a rigid connection when the pedal is depressed slowly. <IMAGE>

Description

SPECIFICATION Device for regulating an internal combustion engine in a motor vehicle The invention relates to a device for regulating an internal combustion engine, partcularly but not exclusively an air compressing internal combustion engine, in a motor vehicle, comprising a means of transmitting a regulating movement between an accelerator pedal and a power output stage, such as a control rod of an injection pump, a spring which is inserted in the transmitting means and a damper which engages on the transmitting means between the spring and power output stage and which exerts a resistance to counteract an actuating movement of the device in the full-load direction.
A device ofthis type is known and is use in standard production vehicles. With this device the movement of the power actuator is intended to be independent of the movement of the accelerator pedal in orderto prevent too rapid adjustment ofthe power actuator and the rapid increase in torque in the internal combustion engine produced as a result of this adjustment, which increased torque can cause unpleasant and dangerous longitudinal oscillations during travel in which the vehicle mass vibrates against the rotating mass of the engine by way of the elasticity and backlash of the drive train.
In the known device the spring consists of rubber-elastic elements which are not compatible with the damper. By means of a rapid and vigorous operation of the accelerator, however, the effect of the damper can be largelyeliminated because ofthe restricted spring deflection of the rubber-elastic elements so that a rapid adjustment of the power actuator is possible, together with its negative consequences.
On the other hand, the rubber-elastic elements are also flexible in the event of slow operation ofthe accelerator pedal when there is no danger of longitudinal oscillations being caused during travel so that the relation between the accelerator position and power actuator position is undetermined and not precisely recognisable to the vehicle driver.
The present invention seeks to provide an engine regulating device able to operate in such a manner that a slow movement by the power actuator which prevents longitudinal oscillations during travel is ensured by rapid operation of the accelerator, and a rigid coupling between the accelerator and power actuator is ensured upon slow operation ofthe acceleratorwhich is less critical for causing longitudinal oscillations.
According to the invention, there is provided a device for regulating an internal combustion engine in a motorvehicle, comprising a means of transmitting a regulating movement between an accelerator pedal and a power output stage, such as a control rod of an injection pump, a spring which is inserted in the transmitting means and a damper which engages on the transmitting means between the spring and power output stage and which exerts a resistance to counteract an actuating movement of the device in the full-load direction, wherein the spring is pretensioned in a spring element against a stop, and the degree of pretensioning of the spring is such that it is excessively compressible when the accelerator pedal is operated rapidly or abruptly, the spring element acting as a rigid connection when the accelerator pedal is operated slowly.
In the device designed in accordance with the invention the damping force which is generated in the damper upon slow, less critical operation ofthe accelerator is so small that the pretensioning ofthe spring is not overcome so that the spring element acts as a rigid transmitting element and the position of the power actuator always corresponds to the position of the accelerator pedal. On the other hand, when the accelerator pedal is operated rapidly or abruptly,the damping force of the damper is greater than the spring pretensioning so that the spring is compressed and onlythen,within a specified period of time, moves the power actuator slowly to counter the resistance ofthe damper into a position which corresponds to the position of the accelerator pedal.
An embodiment if the invention will now be described by way of an example and with reference to the accompanying drawings, in which: Figure 1 shows the device according to the invention in side view, and Figure2 shows, in graphical form, a diagram ofthe time dependence ofthe regulating distance of the power actuator on the regulating distance of the accelerator pedal.
As shown diagrammatically in Figure 1, a floating lever 4 of an injection pump 5 connecting to an internal combustion engine (not shown in further detail), acting as a transmitting means, is operated byan accelerator pedal 1 via rods 2,3,the position of a control rod which is connected to the floating iever 4 and acts as the power actuator in this injection pump determining the quantity of fuel injected. A conventional return spring 6 engages on the floating lever4and engaging on the rod 3 is a fluid damper7 which offers a resistance, dependent on the regulating speed to a regulating movement of the floating lever4 in the full-load direction.
A spring eiement 8 consisting of a spring 11 pretensioned against a stop lOin a housing 9 is fitted between the rods 2 and 3. The spring 11 is connected to the floating lever 4 via the rod 3 and the housing 9 is connected to the accelerator pedal via the rod 2.
The pretensioning and spring characteristic ofthe spring 11 and the damping characteristic ofthe damper7 are determined in such a waythat-taking the spring characteristic of the return spring 6 into account-the damping force ofthedamper7 is less than the pretensioning of the spring 11 when the accelerator pedal 1 is operated slowly. In this case the spring 11 is not compressed, and the spring element 8 acts as a rigid element so that the accelerator pedal 1 and floating lever 4 are adjusted uniformly. The vehicle driver is informed at all times aboutthe position of the power actuator.
Upon rapid operation of the accelerator pedal 1 when there is a danger of longitudinal oscillations being caused during travel, the damping force ofthe damper7 is greaterthan the pretensioning of the spring 11 so that the latter is compressed and the floating lever4 has a lower regulating speed than the accelerator 1. In the subsequent period of time the floating lever4 is adjusted slowly by the tension release in the spring 11 until the spring 11 bears againstthe stop 10 and consequently the accelerator 1 and floating lever 4 again occupy the same positions. In this case the adjustment of the floating lever4 is separate from the regulating movement of the accelerator pedal 1 and only dependent on the spring 11 and damper 7 whereby a slow adjustment of the floating lever 4 is ensured even when the accelerator pedal 1 is operated rapidly.
The described processes are shown in the diagram in Figure 2 in which the regulating distances ofthe accelerator pedal 1 and floating lever4isplotted againsttime t.
Following abrupt operation of the accelerator pedal 1 thefloating lever 4 reaches the position corresponding to the position of the accelerator 1 after a specific period oftime and at a relatively low regulating speed. This period is advantageously of the order of approximately half a second.

Claims (2)

1. A device for regulating an internal combustion engine in a motor vehicle, comprising a means of transmitting a regulating movement between an accelerator pedal and a power output stage, such as a control rod of an injection pump, a spring which is inserted in the transmitting means and a damper which engages on the transmitting means between the spring and power output stage and which exerts a resistance to counteract an actuating movement of the device in the full-load direction, wherein the spring is pretensioned in a spring element against a stop, and the degree of pretensioning of the spring is such that it is excessiveiy compressible when the accelerator pedal is operated rapidly or abruptly, the spring element acting as a rigid connection when the accelerator pedal is operated slowly.
2. A device for regulating an internal combustion engine, substantially as hereinbefore described and with reference to the accompanying drawings.
GB08630801A 1985-12-23 1986-12-23 Accelerator mechanism for a motor vehicle i.c. engine Withdrawn GB2184487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3545939A DE3545939C1 (en) 1985-12-23 1985-12-23 Device for regulating an internal combustion engine in a motor vehicle

Publications (2)

Publication Number Publication Date
GB8630801D0 GB8630801D0 (en) 1987-02-04
GB2184487A true GB2184487A (en) 1987-06-24

Family

ID=6289477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08630801A Withdrawn GB2184487A (en) 1985-12-23 1986-12-23 Accelerator mechanism for a motor vehicle i.c. engine

Country Status (4)

Country Link
DE (1) DE3545939C1 (en)
FR (1) FR2592094A1 (en)
GB (1) GB2184487A (en)
IT (1) IT1199729B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062604A2 (en) * 2001-02-02 2002-08-15 Stoneridge Control Devices, Inc. Electro-mechanical actuator for an adjustable pedal system
US7021415B2 (en) 2002-02-01 2006-04-04 Stoneridge Control Devices, Inc. Electro-mechanical actuator for an electrically actuated parking brake

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220668C1 (en) * 1992-06-24 1993-12-09 Daimler Benz Ag Actuating device for a flap in motor vehicles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475477A (en) * 1936-05-30 1937-11-19 Bosch Robert Improvements in or relating to injection pump apparatus for internal combustion engines
GB683725A (en) * 1949-10-07 1952-12-03 Daimler Benz Ag Improvements relating to regulating means for power installations comprising internal combustion engines with charging blowers
GB707720A (en) * 1952-07-28 1954-04-21 Nydqvist & Holm Ab Improvements in apparatus for regulating the supply of fuel to internal combustion engines
EP0003698A1 (en) * 1978-02-07 1979-08-22 Regie Nationale Des Usines Renault Intake system for a carburettor of an internal-combustion engine
US4210110A (en) * 1976-06-28 1980-07-01 Krebaum Gerald E Carburetor control device
GB2065771A (en) * 1979-12-22 1981-07-01 Bosch Gmbh Robert Exhaust Gas Recirculation Control for an I.C. Engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475477A (en) * 1936-05-30 1937-11-19 Bosch Robert Improvements in or relating to injection pump apparatus for internal combustion engines
GB683725A (en) * 1949-10-07 1952-12-03 Daimler Benz Ag Improvements relating to regulating means for power installations comprising internal combustion engines with charging blowers
GB707720A (en) * 1952-07-28 1954-04-21 Nydqvist & Holm Ab Improvements in apparatus for regulating the supply of fuel to internal combustion engines
US4210110A (en) * 1976-06-28 1980-07-01 Krebaum Gerald E Carburetor control device
EP0003698A1 (en) * 1978-02-07 1979-08-22 Regie Nationale Des Usines Renault Intake system for a carburettor of an internal-combustion engine
GB2065771A (en) * 1979-12-22 1981-07-01 Bosch Gmbh Robert Exhaust Gas Recirculation Control for an I.C. Engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062604A2 (en) * 2001-02-02 2002-08-15 Stoneridge Control Devices, Inc. Electro-mechanical actuator for an adjustable pedal system
WO2002062604A3 (en) * 2001-02-02 2004-04-29 Stoneridge Control Devices Inc Electro-mechanical actuator for an adjustable pedal system
US6736233B2 (en) * 2001-02-02 2004-05-18 Stoneridge Control Devices, Inc. Electro-mechanical actuator for an adjustable pedal system
US7021415B2 (en) 2002-02-01 2006-04-04 Stoneridge Control Devices, Inc. Electro-mechanical actuator for an electrically actuated parking brake

Also Published As

Publication number Publication date
FR2592094A1 (en) 1987-06-26
IT8622624A1 (en) 1988-06-10
GB8630801D0 (en) 1987-02-04
DE3545939C1 (en) 1987-03-12
IT8622624A0 (en) 1986-12-10
IT1199729B (en) 1988-12-30

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)