GB2397138A - A method of controlling an internal combustion engine of a vehicle - Google Patents

A method of controlling an internal combustion engine of a vehicle Download PDF

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Publication number
GB2397138A
GB2397138A GB0400191A GB0400191A GB2397138A GB 2397138 A GB2397138 A GB 2397138A GB 0400191 A GB0400191 A GB 0400191A GB 0400191 A GB0400191 A GB 0400191A GB 2397138 A GB2397138 A GB 2397138A
Authority
GB
United Kingdom
Prior art keywords
engine
vehicle
power consumption
ecm
auxiliary
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Withdrawn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
GB0400191A
Other versions
GB0400191D0 (en
Inventor
Andrew Wicks
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of GB0400191D0 publication Critical patent/GB0400191D0/en
Publication of GB2397138A publication Critical patent/GB2397138A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00Auxiliary drives
    • B60K25/02Auxiliary drives directly from an engine shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/08Introducing corrections for particular operating conditions for idling
    • F02D41/083Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/10Introducing corrections for particular operating conditions for acceleration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/12Introducing corrections for particular operating conditions for deceleration

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

An internal combustion engine (11) has auxiliary engine devices (12-14) which consume engine power when in use. In a method of control of the engine (11), the power consumptions of the auxiliary devices (12-14) are controlled between Maximum and Minimum thresholds, depending upon vehicle engine operating conditions. Preferably, the engine power consumed by said devices (12-14) is increased during conditions of vehicle deceleration or overrun and is reduced during vehicle acceleration and cruise. An engine control module (ECM 16) controls the operation of the engine and is connected to a plurality of sensors (17-19) for monitoring vehicle and engine operating conditions, the ECM being programmed to control the power consumptions of the auxiliary devices (12-14) depending upon sensed conditions.

Description

A Method of controlling an Internal Combustion Engine of a Vehicle This
invention relates to a method of controlling an internal combustion engine of a vehicle and is particularly useful in relation to controlling the engines of motor cars.
Modern motor vehicles are typically provided with auxiliary engine devices such as alternators, air conditioning compressors, pumps etc. which consume engine power or torque on demand. The engine power consumed by the auxiliary devices usually continues when the vehicle is accelerating or cruising which means that the engine power absorbed by said devices during the acceleration and cruise modes causes a fuel economy penalty and a reduction in vehicle performance.
The present invention provides a method of control of the vehicle which ameliorates the effects of the power requirements of auxiliary engine devices.
According to a first aspect of the present invention there is provided a method of control of a vehicle internal combustion engine having an auxiliary engine device which consumes engine power when in use, wherein in said method the engine power consumption of the auxiliary device is varied between a minimum and a maximum depending upon vehicle and engine operating conditions.
Preferably, the engine power consumption of the auxiliary device is increased during conditions of vehicle deceleration or overrun and is reduced during vehicle acceleration and cruise.
Auxiliary engine devices comprise electrical and mechanical pumps driven off the engine, air conditioning compressors, alternators, air suspension pumps, mechanical vacuum pumps, pumps for power hydraulic circuits etc. The engine power consumption of the auxiliary device may be controlled by varying its output, e.g. the current output of an alternator, or by varying the drive ratio between the engine and the device.
The vehicle engine is preferably controlled by an ECM (engine control module) which also controls the engine power consumption of the auxiliary device to vary said consumption depending upon vehicle and engine operating conditions. Preferably, the ECM controls the engine power consumption of the auxiliary device so as to maintain optimum vehicle performance.
Conveniently, under low engine load and overrun conditions the engine power consumption of the auxiliary device would be at a maximum, whereas at higher engine loads the engine power consumption of the auxiliary device may be at a level which is less than the maximum level and which provides acceptable performance of the device and optimum fuel economy for the vehicle.
The ECM may constantly monitor a plurality of engine and vehicle conditions and constantly review the engine power consumption of the auxiliary device in accordance with the monitored conditions.
There may be a plurality of auxiliary devices, some or all of which are controlled by the 1 5 method.
The present invention also provides, according to a second aspect thereof, an internal combustion engine having an ECM which controls the operation of the engine and which is connected to a plurality of sensors for monitoring vehicle and engine operating conditions, the engine having an auxiliary engine device driven by the engine, wherein the ECM is programmed to control the power consumption of the auxiliary device in accordance with a method according to said one aspect The ECM may be connected to a control module for at least one auxiliary device.
The invention will be described by way of example and with reference to the accompanying drawings, of which: Fig.1 is a schematic drawing of a vehicle engine operated in accordance with the present invention; and Fig. 2 is a logic flow diagram showing the steps of the method according to the present invention.
With reference to Fig.1 there is shown an internal combustion engine 11 of a vehicle, in particular a motor car, having at least one auxiliary device and, typically, a plurality of auxiliary devices 12-14 driven by the engine, typically through respective belts driven by a pulley attached to the end of the engine crankshaft. The number and type of auxiliary devices will depend upon the vehicle requirements and may comprise, but is not limited to, the following examples:- air conditioning compressor, alternator, vacuum pump, hydraulic pump and air suspension pump. Preferably all of such devices would be controlled in accordance with this invention but for reasons of practicality or cost not all devices may be so controlled.
The engine operation is controlled by an electronically programmable electronic control module or ECM 16. The ECM 16 is connected to plurality of vehicle operating condition and engine condition sensors, represented by sensors 17-19. The sensors may include but are not limited to the following examples:- an engine speed sensor, engine torque output sensor, an engine torque demand sensor, a vehicle speed sensor, gear position sensor, engine temperature sensors, ambient air temperature sensor, oil temperature sensor, air intake volume sensor, torque converter slip sensor. The ECM 16 is connected to each auxiliary device 12-14, either directly as shown for device 14 or through a respective device control module 21, 22, as shown for the auxiliary devices 12 and 13.
The ECM 16 is pre-programmed with information relating to the engine power consumption of the respective auxiliary devices under different operating conditions as these relate to the output requirements of each device. This information may be programmed in the form of look-up tables or algorithms derived from empirical data. The (A ECM 16 is also pre- programmed with information relating to the maximum and minimum limits of the outputs of the respective auxiliary devices 12-14. These parameters will be based on perceived satisfactory performance of the respective device 12-14 under various operating conditions and with regard to the durability of the device.
The ECM 16 is also pre-programmed with information relating to optimum engine performance at different engine torque output requirements under various service conditions (so-called engine mapping) and is also programmed so that the torque requirements for the various auxiliary devices 12-14 are matched with the vehicle engine torque output.
In operation and with further reference to Fig.2, the ECM 16 at STEP A calculates the desired output and hence engine power consumption of the auxiliary devices 12-14.
STEP B determines if these requirements fall within the maximum and minimum parameters for said outputs.
The ECM 16 monitors the current vehicle and engine operating conditions through the various sensors 17-19 at STEP C and at STEP D determines the optimum torque requirements of the auxiliary devices 12-14 in accordance with vehicle operating conditions, e.g., vehicle accelerating, cruising, or decelerating (in overrun).
The ECM 16 then controls the required output from each auxiliary device 12-14 at STEP E, either directly or through its respective control module 21, 22, in order to match the output and torque requirements to the engine operation and thereby vary the engine power consumption of the auxiliary device between a minimum and a maximum depending upon vehicle and engine operating conditions. The outputs from the auxiliary devices 12-14 are controlled to increase during conditions of vehicle deceleration or overrun, and reduce during vehicle acceleration and cruise. Under low engine load and overrun conditions the auxiliary devices 12-14 could be driven at maximum demand. The variation - 5 in the demand and hence the engine power consumption of the auxiliary device 12- 14 could be continuous (preferable) or in steps according to the type of device and the control methods available. )

Claims (9)

1. A method of control of a vehicle internal combustion engine having an auxiliary engine device which consumes engine power when in use, wherein in said method the engine power consumption of the auxiliary device is varied between a minimum and a maximum depending upon vehicle and engine operating conditions.
2. A method as claimed in Claim 1 wherein the engine power consumption of the auxiliary device is increased during conditions of vehicle deceleration or overrun and is reduced during vehicle acceleration and cruise.
3. A method as claimed in Claim 1 or Claim 2, wherein the vehicle engine is controlled by an engine control module (ECM) which also controls the engine power consumption of the auxiliary device to vary said consumption depending upon vehicle and engine operating conditions.
4. A method as claimed in Claim 3, wherein the ECM controls the engine power consumption of the auxiliary device so as to maintain optimum vehicle performance.
5. A method as claimed in any one of Claims 1 to 4, wherein under low engine load and overrun conditions the engine power consumption of the auxiliary device would be at a maximum.
6. A method as claimed in any one of Claims 1 to 5, wherein at higher engine loads the engine power consumption of the auxiliary device would be at a level which is less than the maximum level and which provides acceptable performance of the device and optimum fuel economy for the vehicle.
7. A method as claimed in Claim 3 or Claim 4 or any claim dependent therefrom, wherein the ECM constantly monitors a plurality of engine and vehicle conditions and
- )
constantly reviews the engine power consumption of the auxiliary device in accordance with the monitored conditions.
8. A method as claimed in any preceding claim wherein there is a plurality of said auxiliary devices 8. An internal combustion engine having an ECM which controls the operation of the engine and which is connected to a plurality of sensors for monitoring vehicle and engine operating conditions, the engine having an auxiliary engine device driven by the engine, wherein the ECM is programmed to control the power consumption of the auxiliary device in accordance with a method as clamed in any of claims 1 to 7.
9. An engine as claimed in Claim 8, wherein the ECM is connected to a control module for at least one auxiliary device.
GB0400191A 2003-01-08 2004-01-07 A method of controlling an internal combustion engine of a vehicle Withdrawn GB2397138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0300375A GB0300375D0 (en) 2003-01-08 2003-01-08 A method of controlling an internal combustion engine of a vehicle

Publications (2)

Publication Number Publication Date
GB0400191D0 GB0400191D0 (en) 2004-02-11
GB2397138A true GB2397138A (en) 2004-07-14

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GB0300375A Ceased GB0300375D0 (en) 2003-01-08 2003-01-08 A method of controlling an internal combustion engine of a vehicle
GB0400191A Withdrawn GB2397138A (en) 2003-01-08 2004-01-07 A method of controlling an internal combustion engine of a vehicle

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GB0300375A Ceased GB0300375D0 (en) 2003-01-08 2003-01-08 A method of controlling an internal combustion engine of a vehicle

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006058619A1 (en) * 2004-12-03 2006-06-08 Bayerische Motoren Werke Aktiengesellschaft Method for controlling accessories of a motor vehicle
WO2006099920A1 (en) * 2005-03-22 2006-09-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Drive train for a compressor and a hydraulic pump
FR2898853A1 (en) * 2006-03-27 2007-09-28 Peugeot Citroen Automobiles Sa Motor vehicle, has wheels comprising disk brake with brake control input for controlling brake, and converters and servomechanisms for controlling negative torque unit and control unit based on need for resistive torque
WO2010139492A1 (en) * 2009-06-02 2010-12-09 Zf Friedrichshafen Ag Method for operating a drive train
EP2434133A1 (en) * 2010-09-27 2012-03-28 CLAAS Selbstfahrende Erntemaschinen GmbH Motor control concept and device for controlling the performance of a motor vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106278A (en) * 1981-09-14 1983-04-07 Himmelstein & Co S Optimising an automatic control system
US4862700A (en) * 1987-07-04 1989-09-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for controlling the operation of a variable displacement refrigerant compressor for a car air-conditioner
JPH0454232A (en) * 1990-06-20 1992-02-21 Mazda Motor Corp Traction controller of vehicle
GB2337609A (en) * 1998-05-18 1999-11-24 Cummins Engine Co Inc Managing engine retarding torque during coast mode

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106278A (en) * 1981-09-14 1983-04-07 Himmelstein & Co S Optimising an automatic control system
US4862700A (en) * 1987-07-04 1989-09-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for controlling the operation of a variable displacement refrigerant compressor for a car air-conditioner
JPH0454232A (en) * 1990-06-20 1992-02-21 Mazda Motor Corp Traction controller of vehicle
GB2337609A (en) * 1998-05-18 1999-11-24 Cummins Engine Co Inc Managing engine retarding torque during coast mode

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006058619A1 (en) * 2004-12-03 2006-06-08 Bayerische Motoren Werke Aktiengesellschaft Method for controlling accessories of a motor vehicle
US7367864B2 (en) 2004-12-03 2008-05-06 Bayerische Motoren Werke Aktiengesellschaft Method for controlling accessories of a motor vehicle
WO2006099920A1 (en) * 2005-03-22 2006-09-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Drive train for a compressor and a hydraulic pump
US7428944B2 (en) 2005-03-22 2008-09-30 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Drive train for a compressor and a hydraulic pump
CN101287620B (en) * 2005-03-22 2011-09-21 克诺尔商用车制动系统有限公司 Drive train for a compressor and a hydraulic pump
FR2898853A1 (en) * 2006-03-27 2007-09-28 Peugeot Citroen Automobiles Sa Motor vehicle, has wheels comprising disk brake with brake control input for controlling brake, and converters and servomechanisms for controlling negative torque unit and control unit based on need for resistive torque
WO2007110527A1 (en) * 2006-03-27 2007-10-04 Peugeot Citroen Automobiles Sa Vehicle with control of elements with negative torque for the regulation of its own dynamics
US8131430B2 (en) 2006-03-27 2012-03-06 Peugeot Citroen Automobiles Sa Vehicle with control of elements with negative torque for the regulation of its own dynamics
WO2010139492A1 (en) * 2009-06-02 2010-12-09 Zf Friedrichshafen Ag Method for operating a drive train
EP2434133A1 (en) * 2010-09-27 2012-03-28 CLAAS Selbstfahrende Erntemaschinen GmbH Motor control concept and device for controlling the performance of a motor vehicle

Also Published As

Publication number Publication date
GB0300375D0 (en) 2003-02-05
GB0400191D0 (en) 2004-02-11

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