EP0784742A1 - Engine temperature management - Google Patents
Engine temperature managementInfo
- Publication number
- EP0784742A1 EP0784742A1 EP95929158A EP95929158A EP0784742A1 EP 0784742 A1 EP0784742 A1 EP 0784742A1 EP 95929158 A EP95929158 A EP 95929158A EP 95929158 A EP95929158 A EP 95929158A EP 0784742 A1 EP0784742 A1 EP 0784742A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- combustion
- engine
- walls
- pressure
- 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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 42
- 239000002826 coolant Substances 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 description 7
- 238000007726 management method Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
- F02D35/026—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures using an estimation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2023/00—Signal processing; Details thereof
- F01P2023/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/04—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
Definitions
- the present invention relates to engine temperature management.
- the conventional manner of regulating the temperature of an engine is to pass the coolant, usually water, through a thermostatic valve having a through flow cross section that increases with temperature.
- the thermostatic valve therefore acts, as its name implies, to maintain the same coolant temperature, regardless of the engine operating conditions.
- the present invention therefore seeks to provide an engine in which the temperature management of the coolant is capable following the changes in heat rejection per operating cycle from the combustion chambers more rapidly and with greater precision.
- a fluid cooled internal combustion engine comprising means for measuring the peak gas pressure in each combustion cycle and means for varying the coolant flow rate in dependence upon of the measured values of peak pressure.
- the invention is predicated on the realisation that the peak pressure in a combustion cycle and the heat rejected to the combustion chamber walls during the same cycle are closely related to one another and that by measurement of the peak pressure one can determine the * temperature gradient in the walls of the combustion chamber and thereby estimate the more critical temperature on the inner surface of the walls. In this way, it is possible to maximise the temperature under all operating conditions and thereby reduce hydrocarbon emissions and fuel consumption.
- the improvement in fuel consumption is believed to be caused by the increase in charge temperature and resultant decrease in charge density. This has the effect of reducing the volumetric efficiency of the engine during part load operation and therefore reducing the air pumping losses.
- the improvement in hydrocarbon emissions results from the lower charge density in the crevice volumes of the combustion chamber and increased oil film temperature.
- the higher oil temperature reduces the effect of storage of hydrocarbons by absorption and subsequent desorption.
- the coolant flow rate is varied as a predetermined function of the prevailing coolant temperature, the measured combustion peak pressure and the engine speed.
- the engine may comprise means for measuring the combustion peak pressure and the coolant temperature, means for estimating the average heat rejection per cycle through the combustion chamber walls from the measured peak pressure, means for estimating the temperature on the inner surface of the walls of the combustion chamber from the temperature of the coolant in contact with the outer surface of the walls of the combustion chamber and the estimated heat rejection during each combustion cycle, and means for varying the coolant flow rate in such a manner as to set the inner surface temperature of the walls at a value determined by the prevailing engine speed and load.
- BMEP brake mean effective pressure
- An engine 10 is connected to a peak combustion pressure sensor 12, a speed sensor 14 and a coolant temperature sensor 16, all of which sensors supply input signals to a micro-computer 18 that may be the engine management computer.
- the signals from the sensors 12, 14 and 16 are processed in the micro-computer 18 and used to estimate the cylinder wall temperatures.
- Output from computer 18 is supplied to a coolant flow control valve 20 which then sets the rate of coolant flow through the engine and radiator to optimise the engine cylinder wall temperature.
- the pressure sensor 12 may be the same as that described in Patent Application No. PCT/GB 95/01387 or it may be comprised of any other known system for measuring combustion pressure.
- the other blocks in the diagram may also be conventional and do not therefore call for detailed description.
- the computer 18 processes the peak pressure information in conjunction with engine speed data and stored constants using a single empirical formula to arrive at the prevailing rate of heat rejection per cycle and from it an estimate of the wall temperature of the combustion chambers.
- the flow rate of the coolant through an electronically controlled valve 20 is then varied by the computer 18 to optimise the cylinder wall temperature for the prevailing operating conditions.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9420062 | 1994-10-05 | ||
GB9420062A GB2293893A (en) | 1994-10-05 | 1994-10-05 | Engine temperature management |
PCT/GB1995/001972 WO1996011332A1 (en) | 1994-10-05 | 1995-08-18 | Engine temperature management |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0784742A1 true EP0784742A1 (en) | 1997-07-23 |
EP0784742B1 EP0784742B1 (en) | 1998-09-16 |
Family
ID=10762368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95929158A Expired - Lifetime EP0784742B1 (en) | 1994-10-05 | 1995-08-18 | Engine temperature management |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0784742B1 (en) |
DE (1) | DE69504858T2 (en) |
GB (1) | GB2293893A (en) |
WO (1) | WO1996011332A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19823603A1 (en) * | 1998-05-27 | 1999-12-02 | Behr Thermot Tronik Gmbh & Co | System for controlling coolant temperature of internal combustion engine of motor vehicle |
FR2836205B1 (en) * | 2002-02-15 | 2004-06-18 | Renault | METHOD FOR DETERMINING THE INSTANTANEOUS TEMPERATURE OF A GAS UNDER PRESSURE, PARTICULARLY A GAS FOR A FUEL CELL |
US9719408B2 (en) * | 2014-08-22 | 2017-08-01 | GM Global Technology Operations LLC | System and method for engine block cooling |
US9869223B2 (en) * | 2014-08-22 | 2018-01-16 | GM Global Technology Operations LLC | Flexible engine metal warming system and method for an internal combustion engine |
CN112814784A (en) * | 2020-12-29 | 2021-05-18 | 江苏奥畋工程科技有限公司 | Intelligent ship turbine fault diagnosis system based on complex network |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS572418A (en) * | 1980-06-06 | 1982-01-07 | Nissan Motor Co Ltd | Engine temperature controller |
JPS58195035A (en) * | 1982-05-11 | 1983-11-14 | Mitsubishi Heavy Ind Ltd | Device for adjusting maximum pressure in engine cylinder for diesel engine |
JPS61138816A (en) * | 1984-12-07 | 1986-06-26 | Toyota Motor Corp | Fuel evaporation rate control system for direct-injection inernal-combustion engine |
JPS6299615A (en) * | 1985-10-24 | 1987-05-09 | Mazda Motor Corp | Engine cooling device |
GB2247745A (en) * | 1990-09-05 | 1992-03-11 | Ford Motor Co | Engine cooling system |
-
1994
- 1994-10-05 GB GB9420062A patent/GB2293893A/en not_active Withdrawn
-
1995
- 1995-08-18 EP EP95929158A patent/EP0784742B1/en not_active Expired - Lifetime
- 1995-08-18 WO PCT/GB1995/001972 patent/WO1996011332A1/en active IP Right Grant
- 1995-08-18 DE DE69504858T patent/DE69504858T2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9611332A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1996011332A1 (en) | 1996-04-18 |
EP0784742B1 (en) | 1998-09-16 |
DE69504858D1 (en) | 1998-10-22 |
GB2293893A (en) | 1996-04-10 |
DE69504858T2 (en) | 1999-02-11 |
GB9420062D0 (en) | 1994-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4424568A (en) | Method of controlling internal combustion engine | |
Torregrosa et al. | A concise wall temperature model for DI Diesel engines | |
US6286366B1 (en) | Method of determining the engine charge temperature for fuel and spark control of an internal combustion engine | |
CN1880747B (en) | Internal combustion engine provided with a heating device in a combustion chamber and a control method for the heating device | |
KR930703533A (en) | Engine management system | |
US5983867A (en) | Device and method for controlling the amount of fuel supplied to an internal combustion engine | |
US20100004845A1 (en) | Self tuning cylinder pressure based heat release computation | |
US10626808B2 (en) | Controlling fuel injection in an internal combustion engine | |
KR100849049B1 (en) | Device and method for controlling suction air amount in internal combustion engine | |
EP0784742B1 (en) | Engine temperature management | |
Khameneian et al. | Model-based dynamic in-cylinder air charge, residual gas and temperature estimation for a GDI spark ignition engine using cylinder, intake and exhaust pressures | |
CN101375044A (en) | A method of identifying engine gas composition | |
US5941213A (en) | Control system for internal combustion engines | |
KR20090031244A (en) | Method and device for operating an internal combustion engine | |
CN101344025B (en) | Method of estimation of the pressure drop | |
US6829923B2 (en) | Apparatus and method for indirectly determining a temperature at a predetermined location in an internal combustion engine | |
Sekozawa et al. | Development of a highly accurate air-fuel ratio control method based on internal state estimation | |
Tillock et al. | Measurement and modeling of thermal flows in an air-cooled engine | |
KR101855067B1 (en) | A method of calibrating a cylinder pressure sensor and an internal combustion piston engine | |
US11365672B2 (en) | Internal combustion engine coolant flow control | |
Almkvist et al. | A study of air to fuel transient response and compensation with different fuels | |
JP3575350B2 (en) | Excess air ratio setting device | |
CN108699993B (en) | Method and device for determining a point in time at which fuel is injected | |
US6561015B1 (en) | Model-based method of estimating crankcase oil pressure in an internal combustion engine | |
Kouremenos et al. | The maximum compression pressure position relative to top dead centre as an indication of engine cylinder condition and blowby |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19970404 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19970912 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REF | Corresponds to: |
Ref document number: 69504858 Country of ref document: DE Date of ref document: 19981022 |
|
ET | Fr: translation filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990722 Year of fee payment: 5 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990818 |
|
26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19990818 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000428 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010501 |