EP0406246A1 - Verfahren zur vermeidung eines zu grossen motorschleppmoments. - Google Patents
Verfahren zur vermeidung eines zu grossen motorschleppmoments.Info
- Publication number
- EP0406246A1 EP0406246A1 EP89901856A EP89901856A EP0406246A1 EP 0406246 A1 EP0406246 A1 EP 0406246A1 EP 89901856 A EP89901856 A EP 89901856A EP 89901856 A EP89901856 A EP 89901856A EP 0406246 A1 EP0406246 A1 EP 0406246A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- change
- drag torque
- fuel
- accelerator pedal
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001419 dependent effect Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
-
- 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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
- F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period
Definitions
- the invention relates to a method for avoiding excessive engine drag torque in road vehicles with the features of the preamble of claim 1.
- DE-OS 21 39 230 a device is known in which the fuel supply to the engine is increased in the event of a speed of the driven wheels which is too low compared to the vehicle speed without brake actuation. This is to prevent the driven vehicle wheels from having too much slip and the vehicle becoming unstable.
- the invention has for its object to limit the braking torque occurring in overrun to a value that prevents permanent blocking of the driven wheels.
- the proposed method Compared to the simple setting of a fuel tightness, which corresponds approximately to the zero load quantity, the proposed method has the advantage that the fuel quantity is reduced to zero on roads with a sufficiently high coefficient of adhesion, i.e. the advantages of the overrun fuel cutoff are retained.
- Fig. 1 shows a block diagram of an embodiment of the invention
- 1 is a sensor measuring the engine speed
- 2 is a characteristic curve memory for the initial values, e.g. B. the remaining injection quantity as a function of the speed
- 3 denotes a multiplier and 4 a adjusting device for setting a link 5 for varying the fuel supply.
- 4 is, for example, the control rod of an injection pump, 5 the injection pump itself.
- An accelerator pedal not shown, also acts on these elements.
- 6 is a signal generator for the state "accelerator pedal in zero load position" or an empty gas switch. The speed signal of the sensor 1 is fed to a differentiator 7.
- the threshold switch 8 responds when the decrease in engine speed and thus the deceleration is so great that a tendency to lock is detected.
- the threshold switch 9 responds when a certain acceleration of the driven wheels is exceeded.
- Mot 10 is an up / down counter, the numerical value of which represents a correction factor which is linked in multiplier 3 to the output of characteristic curve memory 2.
- the standardization is selected so that the largest counter reading represents a factor of 1.
- the counter has inputs for "setting to maximum counter reading” and for counting up or down.
- the counting frequency which is fed to a terminal 13 is e.g. can be selected by a prescaler, specifically for counting up and down. Furthermore, the inputs are edge triggered.
- 11 is an inventoryer
- 12 is an OR gate. If it is signaled via the signal transmitter 6 that the accelerator pedal has been released, a signal dependent on the instantaneous speed and representing the remaining injection quantity is sent from the characteristic memory 2 to the multiplier 3. At its second input, the signal transmitter 6 triggers this instant the correction value 1. Immediately after the accelerator pedal of the adjusting device 4 and thereby the control rod 4 of the injection pump 5 is released, a position is set with which the residual injection quantity is set precisely. This speed-dependent residual injection quantity is chosen so that the drag torque does not reach impermissibly high values under practically all operating conditions. If the drag torque is too high, the drive wheels can lock and the driving stability can thereby be lost.
- the remaining amount was therefore made time-dependent in addition to the speed dependency.
- the correction factor defined in the up / down counter 10 is used for this purpose.
- the correction factor begins to decrease in a ramp over time, starting at value 1, as a result of which the drag torque increases.
- the correction value is reduced until either the value 0 is reached or the braking force assigned to the drag torque leads to a very rapid drop in engine speed due to the static friction of the tire-road system being exceeded. In this latter case, the signal of the differentiator 7 becomes larger than the threshold value of the threshold value switch 8.
Landscapes
- 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 Vehicle Engines Or Engines For Specific Uses (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3808692 | 1988-03-16 | ||
DE3808692A DE3808692A1 (de) | 1988-03-16 | 1988-03-16 | Verfahren zur vermeidung eines zu grossen motorschleppmoments |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0406246A1 true EP0406246A1 (de) | 1991-01-09 |
EP0406246B1 EP0406246B1 (de) | 1992-01-22 |
Family
ID=6349821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890901856 Expired - Lifetime EP0406246B1 (de) | 1988-03-16 | 1989-02-02 | Verfahren zur vermeidung eines zu grossen motorschleppmoments |
Country Status (5)
Country | Link |
---|---|
US (1) | US5113820A (de) |
EP (1) | EP0406246B1 (de) |
JP (1) | JPH03503077A (de) |
DE (2) | DE3808692A1 (de) |
WO (1) | WO1989008776A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3942862C2 (de) * | 1989-12-23 | 2001-04-12 | Bosch Gmbh Robert | Verfahren zur Motorschleppmomentbegrenzung |
US5313922A (en) * | 1989-12-23 | 1994-05-24 | Robert Bosch Gmbh | Method for controlling a flow of fuel to an engine of a vehicle during overrun operation |
DE4226940A1 (de) * | 1992-08-14 | 1994-02-17 | Teves Gmbh Alfred | Verfahren und Schaltungsanordnung zur Verringerung nachteiliger Auswirkungen von Motorschleppmomenten |
AUPN072495A0 (en) * | 1995-01-24 | 1995-02-16 | Orbital Engine Company (Australia) Proprietary Limited | A method for controlling the operation of an internal combustion engine of a motor vehicle |
DE19518813C1 (de) * | 1995-05-23 | 1996-12-19 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung des Drehmoments einer Brennkraftmaschine |
DE19547717B4 (de) * | 1995-12-20 | 2006-07-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Abschwächung von Lastwechselreaktionen bei einem Kraftfahrzeug |
EP0842836B1 (de) * | 1996-07-24 | 2003-06-04 | Denso Corporation | Regelsystem für einen Fahrzeugbewegungszustand |
DE19836845B4 (de) * | 1998-08-14 | 2009-04-09 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Antriebseinheit eines Kraftfahrzeugs |
EP1165352B1 (de) | 1999-12-03 | 2007-07-04 | Robert Bosch GmbH | Verfahren zur beeinflussung eines von einem antriebsmotor eines kraftfahrzeugs abgegebenen moments |
US6600988B1 (en) | 2000-09-26 | 2003-07-29 | Ford Global Technologies, Inc. | Vehicle trajectory control system and method |
US6945910B1 (en) | 2000-09-26 | 2005-09-20 | Ford Global Technologies, Llc | Vehicle trajectory control system |
US6506140B1 (en) | 2000-09-26 | 2003-01-14 | Ford Global Technologies, Inc. | Control for vehicle with torque converter |
GB2368924B (en) | 2000-09-26 | 2004-12-15 | Ford Global Tech Inc | A method and apparatus for controlling a powertrain |
US6516778B1 (en) | 2000-09-26 | 2003-02-11 | Ford Global Technologies, Inc. | Engine airflow control |
US6434467B1 (en) | 2000-09-26 | 2002-08-13 | Ford Global Technologies, Inc. | Vehicle control method for vehicle having a torque converter |
JP4424408B2 (ja) | 2007-10-26 | 2010-03-03 | トヨタ自動車株式会社 | 車載内燃機関の制御装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS602508B2 (ja) * | 1977-07-15 | 1985-01-22 | 株式会社デンソー | 電子制御式燃料噴射装置の燃料停止装置 |
DE2801790A1 (de) * | 1978-01-17 | 1979-07-19 | Bosch Gmbh Robert | Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine |
US4245599A (en) * | 1979-12-19 | 1981-01-20 | General Motors Corporation | Vehicle engine idle speed governor with unsymmetric correction rates |
JPS5862335A (ja) * | 1981-10-09 | 1983-04-13 | Mazda Motor Corp | エンジンのアイドル回転制御装置 |
JPS58143135A (ja) * | 1982-02-19 | 1983-08-25 | Toyota Motor Corp | 電子制御機関の燃料噴射方法 |
DE3521551A1 (de) * | 1985-06-15 | 1986-12-18 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur steuerung und/oder regelung von betriebskenngroessen einer brennkraftmaschine |
JPS61294154A (ja) * | 1985-06-24 | 1986-12-24 | Honda Motor Co Ltd | 内燃エンジンのアイドル回転数制御方法 |
FR2596806B1 (fr) * | 1986-04-02 | 1988-07-29 | Renault | Procede de realimentation en carburant d'un moteur a combustion interne a la suite d'une coupure en deceleration |
-
1988
- 1988-03-16 DE DE3808692A patent/DE3808692A1/de not_active Withdrawn
-
1989
- 1989-02-02 EP EP19890901856 patent/EP0406246B1/de not_active Expired - Lifetime
- 1989-02-02 DE DE8989901856T patent/DE58900775D1/de not_active Expired - Lifetime
- 1989-02-02 JP JP1501717A patent/JPH03503077A/ja active Pending
- 1989-02-02 US US07/573,028 patent/US5113820A/en not_active Expired - Fee Related
- 1989-02-02 WO PCT/EP1989/000090 patent/WO1989008776A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO8908776A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5113820A (en) | 1992-05-19 |
DE3808692A1 (de) | 1989-10-05 |
WO1989008776A1 (en) | 1989-09-21 |
JPH03503077A (ja) | 1991-07-11 |
EP0406246B1 (de) | 1992-01-22 |
DE58900775D1 (de) | 1992-03-05 |
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