EP0140152A2 - Dispositif de commande d'un moteur à combustion interne en décélération - Google Patents
Dispositif de commande d'un moteur à combustion interne en décélération Download PDFInfo
- Publication number
- EP0140152A2 EP0140152A2 EP84111392A EP84111392A EP0140152A2 EP 0140152 A2 EP0140152 A2 EP 0140152A2 EP 84111392 A EP84111392 A EP 84111392A EP 84111392 A EP84111392 A EP 84111392A EP 0140152 A2 EP0140152 A2 EP 0140152A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- function
- overrun
- combustion engine
- stage
- 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.)
- Ceased
Links
Images
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
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
Definitions
- the invention relates to a device according to the preamble of the main claim. It is known to interrupt the fuel supply when operating internal combustion engines when the throttle valve is closed at higher and higher speeds, ie the internal combustion engine is in the so-called overrun mode. Overrun is also present when an internal combustion engine has a higher speed than the position of the throttle valve in the Otto engine or the amount of fuel injected in a diesel engine; if the internal combustion engine is in overrun mode, then work is not desired. Therefore, the carburetor, injection systems, etc. The amount of fuel supplied to the internal combustion engine is reduced or set to zero.
- the overrun operation is not without problems in that, when the fuel supply is interrupted, the internal combustion engine cools down to a certain extent and then, after the overrun operation has ended, there is also a deterioration in exhaust gas and, under certain circumstances, a reduction in driving comfort during the transition must be accepted from overrun in normal operation.
- Another problem is that it must be ensured that the internal combustion engine must always be safely intercepted in terms of its speed behavior, that is to say it must not go out, even if the condition of the thrust cut-off results, for example, when the internal combustion engine is cold.
- there may be a critical load when setting the thrust cut-off when driving downhill with a cold machine i.e. when the throttle valve is closed, the fuel supply is interrupted and then the clutch is suddenly depressed, causing the internal combustion engine to rotate over the Gear is no longer taken. There is then a risk that the speed will drop so quickly before countermeasures are taken that the machine will shut down.
- the device according to the invention with the characterizing features of the main claim has the advantage that it can react comprehensively to practically all possible operating states of an internal combustion engine with a SAS function.
- there is an improvement in the function in the limit range of dynamic reinsertion namely that when the speed of reinsertion (dynamic range) is fallen below, locking is carried out at the same time, so that even if the engine speed rises again or if the engine speed is reduced further, i.e. the function curve is reduced The reinsertion speed is not cut off again over time, that is, the overrun cutoff is activated.
- the invention provides the possibility of suppressing the SAS function and of increasing driving safety and / or driving comfort by means of external switches or control devices which originate from other vehicle components.
- the invention makes it possible to completely prevent the SAS function.
- the invention can also be used for overturn protection with a boost pressure limitation.
- FIG. 1 An embodiment of the invention is shown in the drawing and is described and explained in more detail below.
- the drawing shows an embodiment of the device according to the invention in terms of hardware, ie consisting of discrete circuit elements.
- the exemplary embodiments relate to corresponding control devices in an Otto engine with fuel injection. It is understood that such a system with the corresponding changes can also be used for any fuel metering device, the output signal of the overrun cut-off stage, designated overall by 10 in the drawing, being fed to a logic stage 11, the other input of which is a total Fuel injection system denoted by 12, containing at least one timing element, are supplied with certain fuel injection pulses in their duration as a function of the amount of air passed and the speed of the internal combustion engine.
- a speed sensor 13 is provided, a circuit 14 for detecting the idling condition of the internal combustion engine, a temperature sensor 15 and an air mass / air quantity sensor 16; these elements are known per se in a fuel injection system and are indicated so that the overrun cutoff stage 10 can be classified into the overall system. Therefore, the linkage stage 11 is designed such that it prevents the forwarding of the fuel injection pulses generated by the fuel metering system or the injection system 12, for example to an output stage for the control of fuel injection valves, in the presence of a fuel cut-off signal of the fuel cut-off stage 10.
- the overrun cutoff stage 10 essentially determines from the operating states “throttle valve closed” and the speed n whether there is overrun operation, the speed signal from the speed sensor 13 via a diode 16 in series with a resistor 17 to a speed signal converter stage 18 in the form of an RC element Capacitor 19 comes with adjustable series resistors 20 and 21 against positive supply voltage + U B.
- the output voltage Via two further series resistors 22 and 23 from the connection point 24, the output voltage, which is inversely proportional to the rotational speed, reaches the negative (inverting) input of a first operational amplifier 25, the other input of which supplies the idle signal via various voltage divider circuits in conjunction with an energy store (capacitor 26)
- the control of the operational amplifier 25 and the various Voltage dividers which generate bias voltages are designed in such a way that, in the event of a thrust cut-off, a high signal occurs at the output 25a of the operational amplifier 25, which is conducted via series resistors 27 and 28 to an external output connection (measuring output) SAS information, shown as block 29.
- the same high signal determining the thrust cut-off case passes via the diode 30 and a resistor 31 to a voltage divider consisting of the resistors 32, 33 and 34 and to the inverting (negative) input of a downstream operational amplifier 35, which then has a low (low) output signal Combination stage 11 drives in the sense of suppressing the fuel injection pulses from its output.
- Means for positive feedback are provided on the operational amplifier 25, consisting of the series connection of a diode 36 and a resistor 37 for the positive input of the operational amplifier, so that a hysteresis effect can form in the area of the reinsertion speed;
- the first operational amplifier 35 takes over the evaluation of the respectively supplied actual value signals, while on the second operational amplifier 35 essentially the timing element 40 belonging to the voltage divider of the resistors 32, 33 and 34 with capacitor 41 and the two bleeder resistors 42 and 44 takes over the course of the reinsertion speed specifies which is compared with the processed actual speed curve supplied to the other (non-inverting) input of the operational amplifier 35.
- the respective course of the reinsertion speed is determined decisively by a further comparison circuit, represented by block 47, which works on the timing element 40 via the diode 48 and additionally processes information from different circuit points of the circuit 10.
- block 29 can also be supplied with input information via a block 45, as indicated by the arrows 46, which makes it possible to initiate and carry out measures by suitable dimensioning at this output of the SAS information now used as input that suppress the overrun cutoff function as a whole.
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3337786 | 1983-10-18 | ||
DE19833337786 DE3337786A1 (de) | 1983-10-18 | 1983-10-18 | Vorrichtung zur steuerung des schubbetriebs einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0140152A2 true EP0140152A2 (fr) | 1985-05-08 |
EP0140152A3 EP0140152A3 (fr) | 1986-04-16 |
Family
ID=6212097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84111392A Ceased EP0140152A3 (fr) | 1983-10-18 | 1984-09-25 | Dispositif de commande d'un moteur à combustion interne en décélération |
Country Status (6)
Country | Link |
---|---|
US (1) | US4572126A (fr) |
EP (1) | EP0140152A3 (fr) |
JP (1) | JPH0670390B2 (fr) |
AU (1) | AU559756B2 (fr) |
BR (1) | BR8405209A (fr) |
DE (1) | DE3337786A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0257384A1 (fr) * | 1986-08-13 | 1988-03-02 | Pierburg Gmbh | Dispositif de préparation de mélange |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61132737A (ja) * | 1984-11-30 | 1986-06-20 | Fuji Heavy Ind Ltd | 減速時燃料停止装置 |
JPS61275537A (ja) * | 1985-05-10 | 1986-12-05 | Nissan Motor Co Ltd | 内燃機関の燃料供給装置 |
DE3521551A1 (de) * | 1985-06-15 | 1986-12-18 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur steuerung und/oder regelung von betriebskenngroessen einer brennkraftmaschine |
US5046009A (en) * | 1987-11-05 | 1991-09-03 | Nissan Motor Company, Limited | Slip suppressive drive control system for automotive vehicle with reduction of power output of internal combustion engine |
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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4146006A (en) * | 1976-09-17 | 1979-03-27 | Arthur Garabedian | Fuel injection split engine |
FR2414629A1 (fr) * | 1978-01-17 | 1979-08-10 | Bosch Gmbh Robert | Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne |
GB2043173A (en) * | 1979-02-16 | 1980-10-01 | Nissan Motor | Control of vehicle IC engine fuel cut off |
GB2062291A (en) * | 1979-09-28 | 1981-05-20 | Nissan Motor | Electronic fuel supply control system for internal combustion engines |
FR2511430A1 (fr) * | 1981-08-11 | 1983-02-18 | Peugeot | Dispositif de realimentation en carburant d'un moteur a combustion interne a la suite d'une coupure en deceleration |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586052B2 (ja) * | 1976-09-06 | 1983-02-02 | 日産自動車株式会社 | 空燃比制御装置 |
DE2803145C2 (de) * | 1978-01-25 | 1985-01-17 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren und Einrichtung zum automatischen Abstellen und erneuten Starten eines Motors zur Kraftstoffeinsparung |
JPS5657943U (fr) * | 1979-10-08 | 1981-05-19 | ||
JPS5830438A (ja) * | 1981-08-19 | 1983-02-22 | Nissan Motor Co Ltd | 自動車用エンジンの燃料制御装置 |
DE3134991A1 (de) * | 1981-09-04 | 1983-03-17 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zum betrieb und einrichtung fuer ein kraftstoffsteuersystem einer brennkraftmaschine bei schubbetrieb |
JPS5862331A (ja) * | 1981-10-09 | 1983-04-13 | Toyota Motor Corp | エンジンの燃料噴射制御方法 |
DE3210512C2 (de) * | 1982-03-23 | 1994-05-11 | Bosch Gmbh Robert | Elektronische Steuereinrichtung für das Kraftstoffzumeßsystem einer Brennkraftmaschine |
JPS59226240A (ja) * | 1983-06-07 | 1984-12-19 | Fujitsu Ten Ltd | 燃料噴射装置の燃料遮断器 |
-
1983
- 1983-10-18 DE DE19833337786 patent/DE3337786A1/de active Granted
-
1984
- 1984-09-17 AU AU33086/84A patent/AU559756B2/en not_active Ceased
- 1984-09-20 JP JP59195915A patent/JPH0670390B2/ja not_active Expired - Lifetime
- 1984-09-25 EP EP84111392A patent/EP0140152A3/fr not_active Ceased
- 1984-10-16 BR BR8405209A patent/BR8405209A/pt not_active IP Right Cessation
- 1984-10-17 US US06/661,805 patent/US4572126A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4146006A (en) * | 1976-09-17 | 1979-03-27 | Arthur Garabedian | Fuel injection split engine |
FR2414629A1 (fr) * | 1978-01-17 | 1979-08-10 | Bosch Gmbh Robert | Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne |
GB2043173A (en) * | 1979-02-16 | 1980-10-01 | Nissan Motor | Control of vehicle IC engine fuel cut off |
GB2062291A (en) * | 1979-09-28 | 1981-05-20 | Nissan Motor | Electronic fuel supply control system for internal combustion engines |
FR2511430A1 (fr) * | 1981-08-11 | 1983-02-18 | Peugeot | Dispositif de realimentation en carburant d'un moteur a combustion interne a la suite d'une coupure en deceleration |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0257384A1 (fr) * | 1986-08-13 | 1988-03-02 | Pierburg Gmbh | Dispositif de préparation de mélange |
Also Published As
Publication number | Publication date |
---|---|
JPS6093139A (ja) | 1985-05-24 |
DE3337786A1 (de) | 1985-04-25 |
JPH0670390B2 (ja) | 1994-09-07 |
AU559756B2 (en) | 1987-03-19 |
BR8405209A (pt) | 1985-08-27 |
US4572126A (en) | 1986-02-25 |
EP0140152A3 (fr) | 1986-04-16 |
DE3337786C2 (fr) | 1991-07-18 |
AU3308684A (en) | 1985-04-26 |
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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 |
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17P | Request for examination filed |
Effective date: 19840925 |
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AK | Designated contracting states |
Designated state(s): DE FR GB IT SE |
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PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB IT SE |
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17Q | First examination report despatched |
Effective date: 19870506 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19880607 |
|
APAF | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNE |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ARNOLD, HERBERT, DIPL.-ING. Inventor name: HOFER, HEINZ Inventor name: HORBELT, MICHAEL, DIPL.-ING. |