GB1603921A - Throttle valve control system for an internal combustion engine - Google Patents

Throttle valve control system for an internal combustion engine Download PDF

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Publication number
GB1603921A
GB1603921A GB1950278A GB1950278A GB1603921A GB 1603921 A GB1603921 A GB 1603921A GB 1950278 A GB1950278 A GB 1950278A GB 1950278 A GB1950278 A GB 1950278A GB 1603921 A GB1603921 A GB 1603921A
Authority
GB
United Kingdom
Prior art keywords
butterfly valve
control system
change
rate
internal combustion
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.)
Expired
Application number
GB1950278A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1603921A publication Critical patent/GB1603921A/en
Expired legal-status Critical Current

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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
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/105—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
    • 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
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

(54) A THROTTLE VALVE CONTROL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE (71) We, ROBERT BOSCH GMBH, a German company of Postfach 50, 7 Stuttgart 1, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to a throttle valve control system for an internal combustion engine.
In conventional internal combustion engines, having a fuel metering system, a butterfly valve in an air intake pipe, and a desired value prescribing device for the position of the butterfly valve, the position of the butterfly valve is directly dependent upon the desired value prescribed for the position of the butterfly valve, since an accelerator pedal is directly connected to the butterfly valve. The formation of the mixture in Otto engines is subjected to deficiencies based on physical laws such as the intertia of flow of air or fuel, particularly upon rapid changes in the position of the butterfly valve. These deficiencies sometimes prevent the preparation of an optimally ignitible mixture.This results in misfiring to some extent, thus impairing the quality of the composition of the exhaust gas, and, for the purpose of avoiding these deficiencies which impair the exhaust gas and the travelling behaviour, one is forced to provide fuel enrichment during acceleration. However, this results in considerable disadvantages with respect to fuel consumption and only slightly improves the exhaust gas.
Even electronic injection systems cannot eliminate these deficiencies, since, in these injection systems, the detection of measured values is necessarily subjected to a time lag and, moreover, a certain reaction time elapses between a change in the position of the butterfly valve and the preparation of the mixture.
According to the present invention there is provided a control system for an internal combustion engine having a fuel metering system, a butterfly valve in an air intake pipe, and a device for prescribing a desired value for the position of the butterfly valve, and having at least one device disposed between the desired value prescribing device and the butterfly valve to limit the rate of change in the aperture angle of the butterfly valve in dependence upon operating parameters in at least the opening direction of the butterfly valve.
One advantage of a control system embodying the present invention and which can also be in the form of a regulating device when suitable measuring elements are connected, is a time-adjusted torque characteristic which, not least, contributes to protection of the drive transmission. Furthermore, there can be also a smaller emission of injurious substances during transition operation. Any existing acceleration pump can also be omitted according to the fuel metering system of the internal combustion engine and, possibly, fuel can be saved.
It has proved to be particularly advantageous when the operating parameter determining the rate of change in the aperture angle of the butterfly valve is the engine speed, since, with the retention of the above-mentioned advantages, the maximum possible rate of change is greatly dependent upon engine speed.
Furthermore, the possibility of by-passing the device for limiting the rate of change of the aperture angle of the butterfly valve is provided. By way of example, this is possible in the form of a kick-down device known from automatic gear box control systems. A by-pass facility of this type enables a driver of a vehicle equipped with a control system embodying the present invention to drive the vehicle with the maximum possible acceleration, particularly in dangerous situations when rapid acceleration is required, without having to take into account the possibly thigh emission of injurious substances and the fuel consumption at such times.
The invention will be further described by way of example with reference to the accompanying drawings in which: Fig. 1 shows a control system according to one embodiment of the invention employing electrical means.
Fig. 1 illustrates the principle on which a control system in embodying the present invention can be designed for electrical operation. A series combination comprising a position regulator 20, a rate of change limiting device 21, a speed regulator 22, an amplifier 23, and an adjusting motor 24, and a position sensor 25 for the position of a butterfly valve, are located between an accelerator pedal 10 and the butterfly valve 15. Regulating quantities are fed back to the position regulator 20 and to the speed regulator 22 in each case.
The rate of change limiting device 21 has an input 27 for operating parameters and which, in Fig. 1, is connected to a tachogenerator 28. This possibility of intervention serves to make the admissible rate of change in the position of the butterfly valve dependent upon operating parameters, rotational speed in the present instance, thus rendering it possible to obtain for the butterfly valve a change signal which is graduated according to the prevailing operating behaviour of the internal combustion engine. The simlest manner of influencing the rate of change limiting device is that of adjusting the butterfly valve in individual steps in synchronism with the rotational speed.
A refinement of the invention resides in using an output signal, particularly the output signal of the position regulator 20, to correct the injection time in an internal combustion engine having an injection system, since a fixed relationship, specific for the particular type of internal combustion engine, exists between the quantity of air drawn in and this output signal.
The components of the block circuit diagram shown in Fig. 1 are known to one skilled in the art. A special feature only resides in the device 21 for limiting the rate of change, which, however, can be realised by a back-coupled comparator-amplifier operating as an integrator. The speed regulator 22 may be connected to the butterfly valve 15 mechanically, electro-mechanically or hydraulically.
The limiting device may be by-passed in the event of a high desired value being prescribed.
In the embodiment described, the time characteristic between the adjustment of the accelerator pedal and adjustment of the butterfly valve has to be adapted to the dynamic conditions of mixture formation and the feeding of the mixture, provided that inadequate travelling behaviour does not constitute a limitation. With suitable choice of the transmission behaviour, nonsteady operating states of the internal combustion engine are restored to quasi-steady states, the adaptation obtained for steady conditions then being approximately valid.
Consequently, misfiring and overenrichment cannot occur during transition operation, since the air/fuel ratio is not shifted during this non-steady operation.
WHAT WE CLAIM IS: 1. A control system for an internal combustion engine having a fuel metering system, a butterfly valve in an air intake pipe, and a device for prescribing a desired value for the position of the butterfly valve, and having at least one device disposed between the desired value prescribing device and the butterfly valve to limit the rate of change in the aperture angle of the butterfly valve in dependence upon operating parameters in at least the opening direction of the butterfly valve.
2. A control system as claimed in claim 1, in which the device for limiting the rate of change in the angle of the butterfly valve is controllable with a selectible variable for the purpose of selectively adjusting the desired value prescribing device for the position of the butterfly valve.
3. A control system as claimed in claim 1 or 2, in which the limiting device may be by-passed in the event of a high desired value being prescribed.
4. A control system as claimed in any of the claims 1 to 3, in which the desired value prescribing device produces an electrical signal which is feedable to a position regulator for the aperture angle of the butterfly valve, and the output of the position regulator is connected to a device for limiting the rate of change.
5. A control system as claimed in any of claims 1 to 4, in which the rotational speed acts as the operating parameter for influencing the device for limiting the rate of change.
6. A control system as claimed in any preceding claim in which a control or regulating signal is feedable to the control system of a fuel metering device from one of the points between the desired value pre scribing device and the butterfly valve.
7. Control systems for internal combustion engines, constructed and arranged and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in Fig. 1 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. one embodiment of the invention employing electrical means. Fig. 1 illustrates the principle on which a control system in embodying the present invention can be designed for electrical operation. A series combination comprising a position regulator 20, a rate of change limiting device 21, a speed regulator 22, an amplifier 23, and an adjusting motor 24, and a position sensor 25 for the position of a butterfly valve, are located between an accelerator pedal 10 and the butterfly valve 15. Regulating quantities are fed back to the position regulator 20 and to the speed regulator 22 in each case. The rate of change limiting device 21 has an input 27 for operating parameters and which, in Fig. 1, is connected to a tachogenerator 28. This possibility of intervention serves to make the admissible rate of change in the position of the butterfly valve dependent upon operating parameters, rotational speed in the present instance, thus rendering it possible to obtain for the butterfly valve a change signal which is graduated according to the prevailing operating behaviour of the internal combustion engine. The simlest manner of influencing the rate of change limiting device is that of adjusting the butterfly valve in individual steps in synchronism with the rotational speed. A refinement of the invention resides in using an output signal, particularly the output signal of the position regulator 20, to correct the injection time in an internal combustion engine having an injection system, since a fixed relationship, specific for the particular type of internal combustion engine, exists between the quantity of air drawn in and this output signal. The components of the block circuit diagram shown in Fig. 1 are known to one skilled in the art. A special feature only resides in the device 21 for limiting the rate of change, which, however, can be realised by a back-coupled comparator-amplifier operating as an integrator. The speed regulator 22 may be connected to the butterfly valve 15 mechanically, electro-mechanically or hydraulically. The limiting device may be by-passed in the event of a high desired value being prescribed. In the embodiment described, the time characteristic between the adjustment of the accelerator pedal and adjustment of the butterfly valve has to be adapted to the dynamic conditions of mixture formation and the feeding of the mixture, provided that inadequate travelling behaviour does not constitute a limitation. With suitable choice of the transmission behaviour, nonsteady operating states of the internal combustion engine are restored to quasi-steady states, the adaptation obtained for steady conditions then being approximately valid. Consequently, misfiring and overenrichment cannot occur during transition operation, since the air/fuel ratio is not shifted during this non-steady operation. WHAT WE CLAIM IS:
1. A control system for an internal combustion engine having a fuel metering system, a butterfly valve in an air intake pipe, and a device for prescribing a desired value for the position of the butterfly valve, and having at least one device disposed between the desired value prescribing device and the butterfly valve to limit the rate of change in the aperture angle of the butterfly valve in dependence upon operating parameters in at least the opening direction of the butterfly valve.
2. A control system as claimed in claim 1, in which the device for limiting the rate of change in the angle of the butterfly valve is controllable with a selectible variable for the purpose of selectively adjusting the desired value prescribing device for the position of the butterfly valve.
3. A control system as claimed in claim 1 or 2, in which the limiting device may be by-passed in the event of a high desired value being prescribed.
4. A control system as claimed in any of the claims 1 to 3, in which the desired value prescribing device produces an electrical signal which is feedable to a position regulator for the aperture angle of the butterfly valve, and the output of the position regulator is connected to a device for limiting the rate of change.
5. A control system as claimed in any of claims 1 to 4, in which the rotational speed acts as the operating parameter for influencing the device for limiting the rate of change.
6. A control system as claimed in any preceding claim in which a control or regulating signal is feedable to the control system of a fuel metering device from one of the points between the desired value pre scribing device and the butterfly valve.
7. Control systems for internal combustion engines, constructed and arranged and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in Fig. 1 of the accompanying drawings.
GB1950278A 1977-11-16 1978-05-15 Throttle valve control system for an internal combustion engine Expired GB1603921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772751125 DE2751125A1 (en) 1977-11-16 1977-11-16 CONTROL DEVICE FOR A COMBUSTION ENGINE

Publications (1)

Publication Number Publication Date
GB1603921A true GB1603921A (en) 1981-12-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB1950278A Expired GB1603921A (en) 1977-11-16 1978-05-15 Throttle valve control system for an internal combustion engine

Country Status (3)

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JP (2) JPS5474920A (en)
DE (1) DE2751125A1 (en)
GB (1) GB1603921A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597049A (en) * 1982-12-28 1986-06-24 Nissan Motor Company, Limited Accelerator control system for automotive vehicle
US5144915A (en) * 1989-12-12 1992-09-08 Robert Bosch Gmbh System for controlling an operating parameter of an internal combustion engine of a vehicle
US5265570A (en) * 1989-09-30 1993-11-30 Robert Bosch Gmbh Method and arrangement for controlling the air supply to an internal combustion engine
US5595159A (en) * 1994-02-15 1997-01-21 Robert Bosch Gmbh Method and arrangement for controlling the power of an internal combustion engine
GB2316189A (en) * 1996-08-07 1998-02-18 Denso Corp Electronically-controlled throttle system

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2942851A1 (en) * 1979-10-24 1981-05-07 Vdo Adolf Schindling Ag, 6000 Frankfurt DEVICE FOR SWITCHING OFF AT LEAST ONE CYLINDER OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
DE2951053A1 (en) * 1979-12-19 1981-07-23 Volkswagenwerk Ag, 3180 Wolfsburg Vibration damping system for resiliently-mounted combustion engine - uses servo system to alter fuel-air mix to counteract sudden speed changes
US4392502A (en) * 1980-01-30 1983-07-12 Lucas Industries Limited Internal combustion engine throttle control
DE3019562A1 (en) * 1980-05-22 1981-11-26 Daimler-Benz Ag, 7000 Stuttgart DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE
US4401075A (en) * 1980-10-27 1983-08-30 The Bendix Corporation Automatic speed control for heavy vehicles
DE3131553C2 (en) * 1981-08-08 1983-12-01 Audi Nsu Auto Union Ag, 7107 Neckarsulm Connection device between a power control element of an internal combustion engine, in particular for motor vehicles, and an actuator
DE3135691A1 (en) * 1981-09-09 1983-03-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart LOAD CONTROL OF AN INTERNAL COMBUSTION ENGINE CHARGED WITH AN EXHAUST TURBOCHARGER
DE3205556A1 (en) * 1982-02-17 1983-08-25 Pierburg Gmbh & Co Kg, 4040 Neuss Method for controlling the position of a control element of a combustion engine influencing a fuel-air mixture
DE3209463A1 (en) * 1982-03-16 1983-09-29 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR ACTUATING THE THROTTLE VALVE OF A MOTOR VEHICLE INTERNAL COMBUSTION ENGINE
JPS5974341A (en) * 1982-10-19 1984-04-26 Nissan Motor Co Ltd Accelerator controlling apparatus for car
DE3331597A1 (en) * 1983-09-01 1985-03-21 Bayerische Motoren Werke AG, 8000 München DEVICE FOR REDUCING THE BRAKING TORQUE OF INTERNAL COMBUSTION ENGINES IN MOTOR VEHICLES
JPS6066841U (en) * 1983-10-15 1985-05-11 愛三工業株式会社 Engine throttle valve control device
DE3341720A1 (en) * 1983-11-18 1985-05-30 Bayerische Motoren Werke AG, 8000 München METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE IN A FULL LOAD RANGE
JPS60178940A (en) * 1984-02-24 1985-09-12 Nissan Motor Co Ltd Intake-air control device in internal-combustion engine
DE3408002A1 (en) * 1984-03-03 1985-09-12 Vdo Adolf Schindling Ag, 6000 Frankfurt DEVICE FOR REDUCING VEHICLE LENGTH DYNAMICS INSTABILITIES
DE3512473A1 (en) * 1984-04-05 1985-10-24 Nissan Motor Co., Ltd., Yokohama, Kanagawa Method and device for the adjustment of throttle valves in motor vehicles
DE3519220A1 (en) * 1984-05-30 1985-12-05 Nissan Motor Co., Ltd., Yokohama, Kanagawa DEVICE FOR THROTTLE CONTROL
DE3510176A1 (en) * 1984-08-16 1986-02-27 Robert Bosch Gmbh, 7000 Stuttgart ELECTRONIC DRIVE PEDAL FOR A MOTOR VEHICLE
JPS61207838A (en) * 1985-03-12 1986-09-16 Nissan Motor Co Ltd Accelerator control apparatus for vehicle
DE3545940C1 (en) * 1985-12-23 1991-07-18 Daimler Benz Ag Device for regulating an internal combustion engine in a motor vehicle
DE102013216107A1 (en) * 2013-08-14 2015-02-19 Bayerische Motoren Werke Aktiengesellschaft System for controlling the operation of a motor vehicle with a turbocharged internal combustion engine

Family Cites Families (5)

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DE843625C (en) * 1948-10-02 1952-07-10 Daimler Benz Ag Pressure medium regulation of the fuel injection in internal combustion engines
DE1059235B (en) * 1957-10-04 1959-06-11 Daimler Benz Ag Device for regulating the amount of fuel in injection pumps of internal combustion engines, in particular gasoline injection engines
JPS4938772B1 (en) * 1969-02-05 1974-10-21
JPS491919A (en) * 1972-04-25 1974-01-09
DE2516477C2 (en) * 1975-04-15 1984-11-29 Honda Giken Kogyo K.K., Tokio/Tokyo Device for the automatic actuation of the air flap of carburetors of internal combustion engines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597049A (en) * 1982-12-28 1986-06-24 Nissan Motor Company, Limited Accelerator control system for automotive vehicle
US5265570A (en) * 1989-09-30 1993-11-30 Robert Bosch Gmbh Method and arrangement for controlling the air supply to an internal combustion engine
US5144915A (en) * 1989-12-12 1992-09-08 Robert Bosch Gmbh System for controlling an operating parameter of an internal combustion engine of a vehicle
US5595159A (en) * 1994-02-15 1997-01-21 Robert Bosch Gmbh Method and arrangement for controlling the power of an internal combustion engine
GB2316189A (en) * 1996-08-07 1998-02-18 Denso Corp Electronically-controlled throttle system
US5899830A (en) * 1996-08-07 1999-05-04 Denso Corporation Electronically-controlled throttle system
GB2316189B (en) * 1996-08-07 2000-10-11 Denso Corp Electronically-controlled throttle system

Also Published As

Publication number Publication date
JPS5474920A (en) 1979-06-15
DE2751125A1 (en) 1979-05-17
DE2751125C2 (en) 1987-07-09
JPH0218297Y2 (en) 1990-05-22
JPS6267931U (en) 1987-04-28

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19980514