EP0641414A1 - Control system for metering the fuel supply to an internal combustion engine - Google Patents
Control system for metering the fuel supply to an internal combustion engineInfo
- Publication number
- EP0641414A1 EP0641414A1 EP94907495A EP94907495A EP0641414A1 EP 0641414 A1 EP0641414 A1 EP 0641414A1 EP 94907495 A EP94907495 A EP 94907495A EP 94907495 A EP94907495 A EP 94907495A EP 0641414 A1 EP0641414 A1 EP 0641414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- control system
- temperature
- time
- 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
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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
- F02D41/1488—Inhibiting the regulation
-
- 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
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/061—Introducing corrections for particular operating conditions for engine starting or warming up the corrections being time dependent
-
- 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
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
Definitions
- the invention is based on a control system for the fuel metering of an internal combustion engine according to the preamble of the main claim.
- a method and a device for operating a fuel supply system with lambda control are known from DE 28 05 805 C2. It is provided there that the lambda control is switched on when, in addition to the operational readiness of the probe, a certain internal combustion engine temperature has also been reached. The size of this temperature is specified as "preferably 50 to 85 °".
- DE 30 24 606 AI shows a "control device for the composition of the operating mixture coming into an internal combustion engine for combustion”. This document teaches to switch on the lambda control at two different exhaust gas temperatures, depending on whether there is an idling case or not.
- the control system according to the invention with the features of the main claim has the advantage over the known systems that, within the scope of optimization with good driving behavior of the internal combustion engine, the lambda control is switched on at a very early point in time and thereby further reduces the pollutant emission.
- FIG. 1 shows an overview of a control system of an internal combustion engine
- FIG. 2 shows a flow diagram for determining the switch-on point of the lambda control
- FIG. 3 shows an example of values in connection with the flow diagram of FIG. 2.
- FIG. 1 shows an overview of the system components and operating parameters that are essential in connection with the present invention.
- the internal combustion engine itself is denoted by 10, its intake pipe 11 and its exhaust pipe 12.
- an air mass or air flow sensor 14 In the intake pipe 11, an air mass or air flow sensor 14, a throttle valve 15 and an injection valve 16 are located one behind the other in the flow direction.
- a lambda is in the exhaust pipe Probe 18 attached, which reacts to the occurrence of oxygen in the exhaust gas in a manner known per se after reaching its operating temperature.
- an exhaust gas temperature sensor 25 can be fitted in the exhaust pipe.
- a speed sensor 19 and a temperature sensor 20 are also assigned to internal combustion engine 10 itself.
- a control unit 22 receives input signals from a throttle valve sensor 24 connected to the throttle valve 15, the air quantity sensor 14, the lambda probe 18, the optionally available exhaust gas temperature sensor 25 and the two sensors 19 and 20 for speed and internal combustion engine temperature TMot. Both the exhaust gas temperature and the temperature of the catalytic converter can also be modeled within the control unit from other operating parameters of the internal combustion engine.
- the control unit 20 provides at least one injection signal for the at least one injection valve 16 and ignition signals for the spark plugs of the internal combustion engine, which are not specifically specified.
- the structure of a control system for an internal combustion engine shown in FIG. 1 is known, as is its mode of operation.
- the control unit 22 forms pulse-width-modulated signals for the at least one injection valve 16 and the ignition signals for the individual spark plugs.
- the present invention now specifies measures such as with regard to a Lambda Control in the sense of an exhaust gas that is as low in pollutants as possible, measures are taken in order to achieve the best possible results. It builds on the prior art mentioned at the beginning.
- FIG. 2 shows a flow chart for the determination of the starting point of the lambda control on the basis of a control operation following a starting process.
- the query as to whether there is a starting process is designated by 30. If there is a starting process, then two threshold values are each made from the following characteristic curves 31. te depending on the engine temperature TMot-Start (start temperature) prevailing at the start time.
- the two threshold values are XOLL for the idle load (LL) and XONLL (non-idle load).
- a duration value TVO is also read from a subsequent characteristic curve 32 as a function of the engine temperature TMot-Start prevailing at the start time.
- the subsequent query 33 determines whether the predetermined time period TVO has elapsed since the start time.
- the following query 35 comes into play, where it is determined whether a certain value X has already reached the threshold value XOLL read from the characteristic curve 31 or not.
- a query 36 is provided, in which, in the case of driving operation, ie. H. Non-idle operation, the value X is determined when the threshold value XONLL is reached. If the threshold values in one of the two queries 35 and 36 have not yet been reached, the system is still in control mode (block 38), otherwise control mode (block 39) is adopted. The further blocks 41 and 42 will be discussed later.
- the mode of operation of the flow chart according to FIG. 2 is expediently explained on the basis of the signal curves shown in FIG. 3.
- the internal combustion engine temperature at the time of the start is plotted on the abscissa (start temperature, TMot-Start).
- the ordinates form time period TV and a value XO.
- the dotted line shows the duration values in their course.
- two curves are drawn with solid lines, where XOLL stands for a temperature curve when idling and XONLL for a temperature curve when not idling.
- curve profiles given serve only as an example and the values in the special system have to be based on expedient values for a particular type of internal combustion engine.
- time duration values TVO shown in FIG. 3 are read out from the characteristic curve 32 of the flow chart of FIG. 2. It can be seen that the predeterminable period of time is selected to be shorter as the temperature of the internal combustion engine rises at the time of starting.
- FIG. 2 in conjunction with the curves of FIG. 3, illustrates the mode of operation of the control system according to the invention.
- the value for the idle case (XOLL) and the value for the no-idle case (XOLL), which is valid for a certain start temperature, is read from two characteristic curves. Then, in accordance with block 32, a value is read out for a period of time TVO, which is also dependent on the starting temperature. After this time has elapsed, query 34 clarifies the question of whether or not there is an idle case at the time of the corresponding program run.
- X in connection with the map values XOLL and XONLL is intended to make it clear that different sizes can be used for these values.
- the most important parameter here is the temperature.
- temperature threshold values for the idling case and the non-idling case can be read out from block 31 above the starting temperature and is determined in queries 35 and 36, the instantaneous temperature measured value the two threshold values for the idling mode and the non-idling mode. Idle operation has already reached. Only when these threshold values are exceeded in the idle or non-idle case is the switch from control to regulation.
- a signal can be used that directly or indirectly reflects the energy conversion in the internal combustion engine since the start. This means that at least one of the following variables can be detected indirectly or directly: number of ignitions since the start, sum of the air mass sucked in or air mass since the start, sum of the fuel mass supplied since the start, in particular sum of the injection times issued,
- Integral over the throttle valve angle which also corresponds to a summed load signal.
- the catalyst temperature which can be calculated, for example, from operating parameters of the internal combustion engine.
- the exhaust gas temperature which is measured, for example, with the aid of the exhaust gas temperature sensor 25 or can be derived in a known manner from the internal resistance of the probe 18, the catalyst temperature and thus the operational readiness of the catalyst can be inferred as a model.
- Block 41 in FIG. 2 illustrates various expedient measures during control operation (block 38). It has been found to be particularly expedient to increase the idle speed setpoint in the warm-up phase by a certain delta, and also - alternatively or additionally - to increase the re-use speed to release the fuel supply after the fuel cut-off in push mode or to retard the ignition late adjust.
- Block 42 in the flow chart according to FIG. 2 illustrates the possibility of deregulating a warm-up enrichment factor WL as a function of time and / or ignition via a ramp when switching on the control mode or while delaying its effectiveness, or alternatively or additionally, in the case of the possibility of adding secondary air, first switching off this secondary air addition and only then to let the regulation in block 39 take effect with a selectable delay.
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)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4308813A DE4308813A1 (en) | 1993-03-19 | 1993-03-19 | Control system for the fuel metering of an internal combustion engine |
DE4308813 | 1993-03-19 | ||
PCT/DE1994/000175 WO1994021909A1 (en) | 1993-03-19 | 1994-02-19 | Control system for metering the fuel supply to an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0641414A1 true EP0641414A1 (en) | 1995-03-08 |
EP0641414B1 EP0641414B1 (en) | 1998-06-03 |
Family
ID=6483233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94907495A Expired - Lifetime EP0641414B1 (en) | 1993-03-19 | 1994-02-19 | Control system for metering the fuel supply to an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5533491A (en) |
EP (1) | EP0641414B1 (en) |
JP (1) | JP3466192B2 (en) |
DE (2) | DE4308813A1 (en) |
WO (1) | WO1994021909A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU720836B2 (en) * | 1996-11-13 | 2000-06-15 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4435419A1 (en) * | 1994-10-04 | 1996-04-11 | Bosch Gmbh Robert | Control system for the fuel metering of an internal combustion engine |
DE19545418C2 (en) * | 1995-12-06 | 1997-09-18 | Bosch Gmbh Robert | Electronic control device for metering fuel in an internal combustion engine |
DE19728926C1 (en) * | 1997-07-07 | 1999-01-21 | Bosch Gmbh Robert | Method of lambda-controlled after-start delay in an internal combustion engine with lambda control |
FR2765914B1 (en) * | 1997-07-08 | 1999-09-03 | Renault | METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE |
US6226981B1 (en) | 1999-02-02 | 2001-05-08 | Caterpillar Inc. | Air to fuel ratio control for gas engine and method of operation |
DE10101006A1 (en) * | 2001-01-11 | 2002-07-18 | Volkswagen Ag | Controlling quantity of fuel delivered during starting of internal combustion engine comprises increasing quantity of fuel delivered by starting quantity increasing factor |
JP4321647B2 (en) * | 2007-09-21 | 2009-08-26 | トヨタ自動車株式会社 | Internal combustion engine abnormal output limit device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3918257A (en) * | 1970-12-30 | 1975-11-11 | Toyo Kogyo Co | Exhaust gas purifying device for an internal combustion engine |
DE2522283C3 (en) * | 1975-05-20 | 1981-02-19 | Robert Bosch Gmbh, 7000 Stuttgart | Device for starting and / or post-starting enrichment of the fuel-air mixture fed to an internal combustion engine and formed by means of an electric fuel injection system |
DE2805805C2 (en) * | 1978-02-11 | 1989-07-20 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for operating a fuel supply system with lambda control |
DE3024606A1 (en) * | 1980-06-28 | 1982-01-28 | Robert Bosch Gmbh, 7000 Stuttgart | CONTROL DEVICE FOR THE COMPOSITION OF THE OPERATING MIXTURE COMING INTO AN INTERNAL COMBUSTION ENGINE |
JPS5827844A (en) * | 1981-08-13 | 1983-02-18 | Toyota Motor Corp | Method and device for controlling fuel supply for internal combustion engine |
JPS5872628A (en) * | 1981-10-26 | 1983-04-30 | Toyota Motor Corp | Feedback control method of air-fuel ratio in electronically controlled engine |
JPS59196932A (en) * | 1983-04-25 | 1984-11-08 | Nissan Motor Co Ltd | Air-fuel ratio controlling apparatus for internal-combustion engine |
JPS60259743A (en) * | 1984-06-05 | 1985-12-21 | Honda Motor Co Ltd | Idling control for internal-combustion engine |
JPS6456953A (en) * | 1987-08-25 | 1989-03-03 | Fuji Heavy Ind Ltd | Trouble diagnosing device for exhaust gas recirculation device |
JPH01280651A (en) * | 1988-04-30 | 1989-11-10 | Suzuki Motor Co Ltd | Air-fuel ratio control device |
DE3929746A1 (en) * | 1989-09-07 | 1991-03-14 | Bosch Gmbh Robert | METHOD AND DEVICE FOR CONTROLLING AND REGULATING A SELF-IGNITIONING INTERNAL COMBUSTION ENGINE |
-
1993
- 1993-03-19 DE DE4308813A patent/DE4308813A1/en not_active Withdrawn
-
1994
- 1994-02-19 WO PCT/DE1994/000175 patent/WO1994021909A1/en active IP Right Grant
- 1994-02-19 DE DE59406118T patent/DE59406118D1/en not_active Expired - Lifetime
- 1994-02-19 EP EP94907495A patent/EP0641414B1/en not_active Expired - Lifetime
- 1994-02-19 US US08/341,595 patent/US5533491A/en not_active Expired - Fee Related
- 1994-02-19 JP JP52048794A patent/JP3466192B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9421909A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU720836B2 (en) * | 1996-11-13 | 2000-06-15 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Rolled plate joining apparatus and continuous hot rolling apparatus equipped with the same |
Also Published As
Publication number | Publication date |
---|---|
DE59406118D1 (en) | 1998-07-09 |
US5533491A (en) | 1996-07-09 |
EP0641414B1 (en) | 1998-06-03 |
DE4308813A1 (en) | 1994-09-22 |
JP3466192B2 (en) | 2003-11-10 |
WO1994021909A1 (en) | 1994-09-29 |
JPH07506886A (en) | 1995-07-27 |
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