EP1336041A1 - Method for injecting fuel during the start phase of an internal combustion engine - Google Patents
Method for injecting fuel during the start phase of an internal combustion engineInfo
- Publication number
- EP1336041A1 EP1336041A1 EP01996679A EP01996679A EP1336041A1 EP 1336041 A1 EP1336041 A1 EP 1336041A1 EP 01996679 A EP01996679 A EP 01996679A EP 01996679 A EP01996679 A EP 01996679A EP 1336041 A1 EP1336041 A1 EP 1336041A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- injectors
- combustion engine
- crankshaft
- fuel
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- 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
- F02D41/047—Taking into account fuel evaporation or wall wetting
-
- 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
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
- F02D2041/0092—Synchronisation of the cylinders at engine start
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
Definitions
- the present invention relates to a method for injecting fuel into a multi-cylinder internal combustion engine.
- the cylinders are divided into a first and a second cylinder group depending on the two different levels of the camshaft signal.
- the cylinders of the first group are supplied with the pre-injectors (group injectors) immediately after a start detection, while the pre-injectors for the cylinders of the second group are delayed.
- the fuel quantities of the pre-injector are chosen to be the same.
- the present invention is based on the object of specifying a method for injecting fuel into a multi-cylinder internal combustion engine, in which fuel-air mixtures with different lambda values are largely avoided in the starting phase.
- the present invention is based on the finding that an internal combustion engine always remains at certain discrete positions after being switched off in the disengaged state, the number of discrete positions over two crankshaft revolutions (760 °) corresponding to the number of cylinders. In the case of n cylinders, these are therefore n standstill angular positions which, moreover, have the same angular distances relative to one another. Experiments have also shown that the speed behavior of the internal combustion engine and the timing of the opening of the intake valves to the
- the fuel quantities of the pre-injectors can therefore be selected depending on the sequence of the pre-injectors and the air fillings to be expected, the air fillings to be expected being determined only once must and the corresponding values can then be used at every start. Since the air fillings primarily depend on the speed in the respective intake phase, the air fillings are preferably determined as a function of the expected speed in the respective intake phases.
- the fuel quantities of the pre-injectors are determined by multiplying a standard quantity by weighting factors assigned to a pre-injector in each case. If the weighting factors could also be estimated, they are expediently determined experimentally for each series of an internal combustion engine and then stored in the central control unit.
- the present invention takes advantage of the fact that the internal combustion engine always remains at certain discrete positions in the disengaged state after being switched off. However, it should be emphasized that it is not necessary to know these standstill positions in order to carry out the method according to the invention. Rather, it is sufficient for the method according to the invention to know the order of the pre-injectors in order to specify the fuel quantities of the pre-injectors as a function thereof.
- the pre-injectors are deposited in quantities which are at least approximately adequate for the respective air filling. Too rich or too lean fuel-air mixtures are avoided, which results in a corresponding reduction in pollutant emissions.
- Figure 1 is a schematic sectional view of an internal combustion engine in the form of a gasoline engine with gasoline injection;
- Figure 2 is a graph plotting speed, camshaft, crankshaft, injector, and intake valve signals over time.
- FIG. 1 shows a schematic partial section through an internal combustion engine which, in the exemplary embodiment described, is designed for illustration purposes as a four-cylinder gasoline engine with gasoline injection.
- a common electronic control unit 1 is assigned to the internal combustion engine 3, which controls the ignition, fuel injection and other processes of the internal combustion engine.
- At least one inlet valve 6 and at least one injection valve 2 are assigned to each cylinder 7.
- the injection valve 2 injects fuel into the intake manifold directly onto the valve plate of the intake valve 6.
- the crankshaft 8 is assigned a crankshaft sensor 4 with a toothed sensor wheel, which generates a crankshaft signal CRK representing the crankshaft angle (see lower half of FIGS. 2 and 3).
- the camshaft 5, which controls the intake valves 6 and rotates at half the speed of the crankshaft 8, is assigned a camshaft sensor 9 for generating a camshaft signal CAM (see lower half of FIGS. 2 and 3).
- the camshaft 5 can be adjustable in angle relative to the crankshaft 8, but this is by no means necessary for the method to be described.
- crankshaft signal CRK In FIGS. 2 and 3, lower half, the crankshaft signal CRK, the camshaft signal CAM and the speed N are plotted against time.
- Each pulse of the crankshaft signal CRK corresponds to one tooth of the transmitter wheel, with a double tooth gap after every 60 teeth as synchronization pulse S for one full revolution of the crankshaft.
- DJ 3 er Hi F for DJ F ⁇ 3 cn ⁇ d 3 3 DJ er DJ ⁇ 3 cn ⁇ O ⁇ F- er fr ⁇ ⁇ ⁇ ⁇ ⁇ J er ⁇ F- ⁇ d F- 3 FF d Hi A ⁇ F 1 F- ⁇ CL CO tr 3 ⁇ rt ⁇ rt P- ⁇ ⁇ tu O er cn F 3 A d ⁇ 3 O rt F- F " ⁇ 3 ⁇ F F- P-
- DJ er DJ ⁇ d ⁇ DJ rt F- cn ⁇ DJ DJ ⁇ F- A DJ ⁇ ⁇ T) tr S ⁇ 3 cn ⁇ F ⁇ P- ⁇ ⁇ ⁇ tr rt fr ⁇ t F ta Hi ⁇ 3 fr d 3 Hi ⁇ ⁇ ⁇ 3 rt ⁇ s: 3 F- ⁇ dof F- d: ⁇ DJ N rt ⁇ rt ⁇ ⁇ Fi rt F- DJ: FFFO fr F tu
- the method according to the invention can in principle be used in any pre-injection strategies, for example also in the method according to EP 0 371 158 B1 discussed above, in which the pre-injectors of a first cylinder group are released at the same time and the pre-injectors of the second cylinder group are delayed in time.
- the method according to the invention is used with particularly good success in a pre-injection strategy in which all the pre-injectors are placed one after the other in chronological order.
- An example of such a pre-injection strategy is explained in more detail below with reference to FIG. 2.
- the speed N of the internal combustion engine is plotted over time.
- the control signals IV1 - IV4 for the four injection valves are plotted over time for the four cylinders 1 to 4 of the four-cylinder internal combustion engine, the four pilot injectors I being designated II - 14.
- the control signals EV1-EV4 for the four intake valves are plotted over time, the opening pulses for the opening of the intake valves being designated E1-E4.
- the top two lines of FIG. 2 show the pulses for the top dead center (TDC1-TDC4) of the four cylinders and the top dead center (TDC1) of the cylinder 1.
- a starter identification E is provided for starting the internal combustion engine.
- the camshaft signal CAM is either high or low, in the example in FIG. 2 low.
- Figure 2 in a first group with the cylinders 3, 4 and a second group with the cylinders 1, 2).
- DJ DJ - 3 • F rt DJ rt 3 Hi rt ⁇ DJ F ⁇ rt s; 3 ⁇ 3 P- o ⁇ CL rt 3 ⁇ ! O 3 P- ⁇ H INI er 3 Hi cn 3 er F- 3 F- ⁇ tr 3 er to 3 ⁇ P- O tu CL O cn rt CO • ⁇ A d ⁇ cn et et ⁇ et F- er ⁇ 3 ⁇ 3 cn? -
- the internal combustion engine is synchronized, and thus a defined sequence of the pre-injections occurring after the synchronization pulse S can be determined by the central control unit 1.
- this pre-injection strategy results in a defined sequence of the cylinders supplied with pre-injectors I one after the other, in the illustrated case cylinder 4, cylinder 1, cylinder 2 and cylinder 3.
- the fuel quantities of the associated pre-injectors 14, II, 12 and 13 become determined by multiplying the standard quantity by the fixed weighting factors.
- the sequence of the cylinders supplied with the pre-injectors changes.
- the fuel quantities of the successive pilot injector I can always be determined using the same weighting factors.
- the pre-injection method described above is only one example of a pre-injection strategy in which the method according to the invention can be used.
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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10056863A DE10056863C1 (en) | 2000-11-16 | 2000-11-16 | Fuel injection method for start phase of multi-cylinder IC engine uses fuel pre-injection for providing wall film in each engine cylinder |
DE10056863 | 2000-11-16 | ||
PCT/DE2001/004285 WO2002040848A1 (en) | 2000-11-16 | 2001-11-15 | Method for injecting fuel during the start phase of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1336041A1 true EP1336041A1 (en) | 2003-08-20 |
EP1336041B1 EP1336041B1 (en) | 2006-06-28 |
Family
ID=7663547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01996679A Expired - Lifetime EP1336041B1 (en) | 2000-11-16 | 2001-11-15 | Method for injecting fuel during the start phase of an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US6769412B2 (en) |
EP (1) | EP1336041B1 (en) |
DE (2) | DE10056863C1 (en) |
WO (1) | WO2002040848A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6931840B2 (en) * | 2003-02-26 | 2005-08-23 | Ford Global Technologies, Llc | Cylinder event based fuel control |
DE102004028092A1 (en) | 2004-06-09 | 2005-12-29 | Robert Bosch Gmbh | Method for starting an internal combustion engine |
DE102004057260A1 (en) * | 2004-11-26 | 2006-06-01 | Robert Bosch Gmbh | Internal combustion engine operating method for motor vehicle, involves obtaining periodic signal from operation value of engine, and evaluating cylinder-specific characteristic of value for determining current operating phase of cylinders |
DE102005000612A1 (en) * | 2005-01-03 | 2006-07-13 | Robert Bosch Gmbh | Starting process for internal combustion engine involves setting starting requirements before starting, and operating ignition and direct injection at setting |
DE102005016067B4 (en) * | 2005-04-07 | 2007-06-21 | Siemens Ag | Method for increasing the start reproducibility during start-stop operation of an internal combustion engine |
CN110566358B (en) * | 2019-09-30 | 2022-03-01 | 潍柴动力股份有限公司 | Engine starting control method, device, equipment and storage medium |
CN113217248B (en) * | 2021-06-02 | 2022-08-16 | 江门市大长江集团有限公司 | Motorcycle, fuel injection amount control method and device, and computer readable storage medium |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623042A1 (en) * | 1986-07-09 | 1988-01-14 | Bosch Gmbh Robert | FUEL INJECTION METHOD |
ES2024616B3 (en) * | 1988-11-28 | 1992-03-01 | Siemens Ag | PROCEDURE FOR INJECTING FUEL IN AN INTERNAL COMBUSTION MACHINE |
DE3923478C2 (en) * | 1989-07-15 | 2000-02-03 | Bosch Gmbh Robert | Sequential fuel injection with pre-spray |
DE4141713C2 (en) * | 1991-12-18 | 2003-11-06 | Bosch Gmbh Robert | Encoder arrangement for cylinder detection and emergency operation in an internal combustion engine with n cylinders |
DE4141714C2 (en) * | 1991-12-18 | 2002-11-14 | Bosch Gmbh Robert | Control system for an internal combustion engine |
US5209202A (en) * | 1992-07-27 | 1993-05-11 | Ford Motor Company | Multiple functions cam sensing |
DE4230616A1 (en) * | 1992-09-12 | 1994-03-17 | Bosch Gmbh Robert | Device for recognizing the position of at least one shaft having a reference mark |
JPH06185387A (en) * | 1992-12-18 | 1994-07-05 | Nippondenso Co Ltd | Fuel injection controller for internal combustion engine |
DE4304163A1 (en) * | 1993-02-12 | 1994-08-25 | Bosch Gmbh Robert | Device for controlling fuel injection in an internal combustion engine |
DE19524112A1 (en) | 1994-07-30 | 1996-02-01 | Volkswagen Ag | Method and device for rapid starting of multi=cylinder IC engine |
DE19734595A1 (en) * | 1997-08-09 | 1999-02-11 | Bosch Gmbh Robert | Procedure for determining segment times |
DE19735720A1 (en) * | 1997-08-18 | 1999-02-25 | Bayerische Motoren Werke Ag | Method for recognizing the combustion stroke of a specific cylinder when starting an internal combustion engine |
DE19741966C2 (en) * | 1997-09-23 | 2002-11-07 | Siemens Ag | Method for injecting fuel in a multi-cylinder internal combustion engine |
JP2000199445A (en) * | 1998-12-28 | 2000-07-18 | Hitachi Ltd | Engine driving motor control device |
DE19933845A1 (en) * | 1999-07-20 | 2001-01-25 | Bosch Gmbh Robert | Device for detecting the turning back of a rotating part of an internal combustion engine |
US6679223B2 (en) * | 2001-04-20 | 2004-01-20 | Denso Corporation | Engine control system with cam sensor |
-
2000
- 2000-11-16 DE DE10056863A patent/DE10056863C1/en not_active Expired - Fee Related
-
2001
- 2001-11-15 US US10/181,604 patent/US6769412B2/en not_active Expired - Lifetime
- 2001-11-15 DE DE50110362T patent/DE50110362D1/en not_active Expired - Lifetime
- 2001-11-15 WO PCT/DE2001/004285 patent/WO2002040848A1/en active IP Right Grant
- 2001-11-15 EP EP01996679A patent/EP1336041B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0240848A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6769412B2 (en) | 2004-08-03 |
US20030000501A1 (en) | 2003-01-02 |
DE10056863C1 (en) | 2002-03-14 |
DE50110362D1 (en) | 2006-08-10 |
EP1336041B1 (en) | 2006-06-28 |
WO2002040848A1 (en) | 2002-05-23 |
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