WO2006008975A1 - エンジンの燃料噴射制御方法及び燃料噴射制御装置 - Google Patents
エンジンの燃料噴射制御方法及び燃料噴射制御装置 Download PDFInfo
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- WO2006008975A1 WO2006008975A1 PCT/JP2005/012582 JP2005012582W WO2006008975A1 WO 2006008975 A1 WO2006008975 A1 WO 2006008975A1 JP 2005012582 W JP2005012582 W JP 2005012582W WO 2006008975 A1 WO2006008975 A1 WO 2006008975A1
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- Prior art keywords
- engine
- control
- fuel injection
- control data
- data
- Prior art date
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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
- F02D41/06—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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
Definitions
- the present invention relates to engine control including engine fuel injection, and in particular, engine fuel injection control with improved startability of an engine that is started by an external force such as a kick without a battery.
- the present invention relates to a method and a fuel injection control device.
- the ECU Based on detection signals from various sensors arranged in and around each part of the engine, the ECU draws out the engine's capacity to the maximum according to the changing driving situation and improves fuel efficiency and exhaust gas.
- the engine is intensively controlled so as to perform optimal control to reduce harmful gases in the gas as much as possible. Therefore, fuel injection control of the engine is one of the most important control items of the ECU.
- Engines mounted on vehicles such as small motorcycles, motorbikes, snowmobiles, and small motor boats do not include a cell motor for starting the engine and a notch for rotating the engine. It can be activated by external force (human power) using a lever or starting rope.
- a vehicle equipped with an engine activated by such an external force is equipped with a power supply device for operating a control system including an ECU, and when the engine rotates, the engine crankshaft
- the power supply from the power supply device is interrupted when the engine is stopped, so the engine control program is started after the engine is started.
- the engine control data necessary for engine control is read.
- the engine control program is normally stored in a non-volatile memory such as a ROM as a fixed memory.
- the engine control data corrects changes in characteristics based on changes over time of the engine. Since it is necessary to perform learning control that corrects or corrects it, it must be stored in a rewritable memory. However, such memory for storing engine control data needs to be non-volatile so that the stored data will not be lost even if the engine is stopped and the power supply is cut off.
- Such engine control data includes data and maps for calculating the appropriate fuel injection amount, and data for calculating the optimal ignition timing of the spark plug, and these control data are corrected or corrected. Factors that cause this include changes in the flow characteristics of air and fuel due to deposits and the like adhering to the radiator, air flow meter, and intake passage.
- FIG. 7 is a timing chart showing an example of fuel injection at the time of engine start that is started by an external force that has been performed conventionally.
- the reset signal is canceled when the power supply voltage that rises when the engine is started reaches a predetermined value
- the engine control program is started after each register in the ECU is initialized, and the engine control program is started. Data is read from non-volatile memory. As a result, normal fuel injection control is started. Therefore, fuel injection that does not depend on ECU control is performed until the normal engine fuel injection control is started.
- Patent Document 1 describes, as a technology related to fuel supply, a starter fuel supply unit that is used only at the time of start, an engine start operation detecting means that operates by the negative pressure in the intake passage when the engine is started by an external force, and And a fuel injection device configured to supply fuel to the start fuel supply device and to inject fuel into the intake passage when the engine start operation detecting means detects the start of the engine. And then.
- Patent Document 2 supplies operating power to the fuel injection valve through another path without depending on the control of the CPU (ECU) until the engine reaches self-powered operation (operation controlled by the ECU).
- a fuel injection device is disclosed in which the fuel injection valve is opened and a large amount of starting fuel is injected.
- Patent Document 3 discloses that the number of injections is increased in order to prevent the air-fuel mixture concentration in the engine cylinder from becoming high and the engine becoming more difficult to start when the engine kick start is repeated. A fuel injection device in which the injection time is shortened as much as possible will be disclosed. Patent Document 1: JP-A 63-170528
- Patent Document 2 Japanese Patent Laid-Open No. 63-259129
- Patent Document 3 Japanese Patent Laid-Open No. 6-17682
- the engine Power at start-up The time required for proper fuel injection control is a predetermined time.
- the present invention provides an engine control method that is activated by an external force such as a kick, and the engine start force is also shortened as much as possible until the regular fuel injection control by the ECU is performed.
- the purpose is to improve the fuel consumption of the engine and to suppress the emission of harmful gases during the period.
- the first embodiment of the present invention is an engine activated by an external force.
- the process of starting the engine control program after the power supply voltage rising by the power supply of the generator power connected to the engine reaches a predetermined voltage level, and the fuel injection control of the engine Based on the detection values of various sensors related to
- a fuel for an engine comprising: a process for reading, and a process for performing engine control including subsequent fuel injection control based on each detected value of the various sensors and the control data!
- An injection control method is provided.
- the first fuel injection control is executed based on the detected values of various sensors related to the fuel injection control of the engine. Following execution of the injection control, the engine control data is read, and the subsequent fuel injection control is made normal based on the read control data and the detection values of the various sensors.
- the startup power supply voltage is increased by the power supply of the generator power connected to the engine according to the control method of the engine activated by the external force.
- V a process of executing the first fuel injection of the engine, a process of reading control data other than the engine control data related to the start subsequent to the execution of the first fuel injection control, A process for performing engine control including subsequent fuel injection control based on each detected value of the sensor and all the read control data; and a process for performing engine control including the subsequent fuel injection control. Is to provide.
- the engine control data is divided into data related to engine start and other data in advance, so that the first fuel injection control is related to start. Based on control data and detection values of various sensors, the normal fuel injection is performed based on the detection values of the various sensors and all the control data read. Control is performed.
- the engine control program is stored in the (fixed) ROM
- the engine control data is stored in the ROM and the EEPROM, respectively.
- the engine control data stored in the EEPROM includes a correction program and correction data for correcting a control error due to a change with time of the engine.
- the present invention corresponds to the first embodiment described above, and includes a power supply unit that receives power supply from a generator connected to an engine that is activated by an external force, a control program for the engine, Memory means for storing control data, the control program and control data, and a control device for performing engine control including fuel injection of the engine based on detection values of various sensors attached to the engine, And the control device executes the first fuel injection of the engine based on the detected values of the various sensors by starting the control program after the power supply voltage reaches a predetermined voltage level. Engine control including subsequent fuel injection is performed by reading the control data after the initial fuel injection control. There is provided a morphism fuel injection control device.
- the present invention further corresponds to the above-described second embodiment, and includes a power supply unit that receives power supply from a generator coupled to an engine that is activated by an external force, a control program for the engine, Memory means for storing control data, the control program and control data, and a control device for performing engine control including fuel injection of the engine based on detection values of various sensors attached to the engine, And the control device starts the control program after the power supply voltage reaches a predetermined voltage level, and reads only control data related to engine start from the engine control data.
- the first fuel injection of the engine is executed based on the detection values of the various sensors, and after the first fuel injection control, By reading the control data, the various detection values and said read all of the sensors
- An engine fuel injection control device is provided that performs engine control including subsequent fuel injection control based on the control data.
- normal fuel injection control can be established in a very short time after the engine is started by an external force such as depression of the kick lever, compared to the conventional technology, so that the engine startability can be improved.
- an external force such as depression of the kick lever
- FIG. 1 shows an example of the overall configuration of an engine to which the present invention is applied.
- the ECU 2 constituting the fuel injection control apparatus and various sensors connected to the ECU 2 and arranged in the engine parts and the periphery thereof are connected.
- the various sensors include an opening sensor for detecting the throttle opening of the intake throttle 8, an engine temperature sensor for measuring the intake air temperature, a pressure sensor for measuring the intake air pressure, and an engine temperature.
- ECU2 has detection signals output from these various sensors and switches, Engine control including fuel injection control of the engine is performed by reading engine control data stored in EEPROM and data stored in RAM, which will be described later.
- the generator 22 shown in FIG. 2 is connected to the crankshaft of the engine 1, and the electric power generated by the rotation of the engine is supplied to the power supply unit 23 (FIG. 2), and the electric power is supplied.
- the voltage is controlled to a predetermined voltage level in the source control unit 24 (FIG. 2) and then supplied to all control systems including the ECU 2.
- the combustion chamber (cylinder or cylinder) 10 of the engine 1 is filtered by the air filter 9 and dust and dirt are collected.
- the removed air air in the outside air
- the intake valve 17 is opened.
- the amount of air supplied is controlled by ISC19.
- fuel injection control is performed to inject an estimated fuel amount commensurate with the air amount determined.
- FIG. 2 shows an example of a block configuration for explaining the ECU 2 constituting the fuel injection control device of the present invention.
- the ECU 2 includes a CPU 21 as a control center, a RAM 29 for storing temporary data, output values of various sensors, switch states, calculation results, and the like as a memory device.
- ROM 27 for storing data for calculating an appropriate fuel injection amount
- EEPROM 28 for recording control data including data for correcting or correcting a control error caused by changes in the engine system over time. Composed.
- the engine control data stored in the EEPROM 28 includes a correction program and correction data for correcting a control error due to engine change over time.
- the causes of such engine aging are injectors (injector charge injectors), air flow meters, intake passages, etc.
- injector charge injectors injector charge injectors
- air flow meters air flow meters
- intake passages etc.
- the various memory devices 27, 28 and 29 shown in FIG. 2 may be so-called one-chip microcomputers integrated with the CPU 21.
- control data stored in the EEPROM 28 is the control data related to the engine start and the engine not related to the engine start in the ECU 2 according to a second embodiment of the present invention to be described later.
- the control data is stored in a state that can be divided or divided into two, and these can be selectively read out.
- the ECU 2 includes a generator connected to the crankshaft of the engine in addition to the above-described components.
- a power supply unit 23 that receives power from the power supply unit 23, and a power supply control unit 24 that is connected to the power supply unit 23 and controls the voltage to a plurality of predetermined voltage levels to supply various sensors and various devices constituting the control system. And an input interface 25 for sampling the output signals of various sensors and switches, and an output interface 26 for outputting control signals to various control devices constituting the engine system of the spark plug and the fuel injection device. .
- the ECU 2 centrally performs various engine controls such as engine fuel injection control, intake air amount control, ignition (timing) control, idle rotation control, and the like.
- engine fuel injection control intake air amount control
- ignition (timing) control ignition (timing) control
- idle rotation control idle rotation control
- FIG. 3 shows an example of a timing chart for explaining the first embodiment of the fuel injection control according to the present invention.
- the first embodiment according to the timing chart shown in FIG. 3 will be described with reference to FIGS.
- the present invention is based on the detected values of the above-mentioned various sensors related to the fuel injection control of the engine 1 for the time being by executing the engine control program that has been started.
- the first fuel injection of engine 1 is executed.
- the CPU 21 After executing the first fuel injection in this way, the CPU 21 reads the engine control data stored in advance in the EEPROM 28, and this time, reads the detected values of the various sensors. Based on the control data, the engine control including the subsequent normal fuel injection control is performed.
- the fuel injection control by the ECU 2 is started from the rise of the power supply voltage due to the start of the engine. Therefore, the time required for reading the control data stored in the EEPROM 28 is not included, so the engine startability is improved by greatly shortening the unstable time period during which the engine starts during this period. At the same time, it has made it possible to improve the fuel efficiency of the engine and reduce harmful gas emissions.
- FIG. 4 shows a flowchart of the control flow of the first embodiment of the present invention explained in FIG.
- the CPU 21 in the ECU 2 when the engine is started by an external force such as kick activation (S 11), the CPU 21 in the ECU 2 generates a reset signal after the power supply voltage reaches a predetermined level. When this reset signal is released (S12), the CPU 21 and RAM 29 are initialized and the engine control program is started (S13).
- the CPU 21 inputs detection signals from various sensors (at least sensors relating to fuel injection) based on the activated engine control program (S14), and based on this, the ignition timing and fuel injection are input.
- the first fuel injection is executed by calculating the quantity, etc. (S15).
- the CPU 21 reads the engine control data stored in advance in the EEPROM 28 (S16), and performs the subsequent fuel injection control with the detected values of various sensors and all the control data read. (S17).
- This regular fuel injection engine injection control is continued until an engine stop command is issued by turning off the ignition key or the like (S18).
- the CPU 21 The engine control data used or corrected in the fuel injection control during this period is saved to a predetermined address in the EEPROM 28 (S19).
- FIG. 5 shows an example of a timing chart for explaining the second embodiment of the fuel injection control according to the present invention.
- the second embodiment according to the timing chart shown in FIG. 5 will be described with reference to FIGS.
- the EEPROM 28 shown in FIG. 2 includes control data related to engine start, engine control data not related to engine start, It is stored in a state that can be divided or divided into two, and these can be selectively read.
- the CPU 21 After execution of the first fuel injection control performed in this way, the CPU 21 stores other control data other than the control data related to the engine start selectively read from the EEPROM 28 first.
- the engine control including reading and subsequent fuel injection control is performed based on the detected values of various sensors and all the control data read.
- the fuel injection control according to the second embodiment has a process of reading only the data related to the engine start in the EEPROM 28 after the engine control program is started, as compared with the first embodiment described above. Although it requires a certain amount of time to enter the first fuel injection, it has a feature that normal fuel injection control can be executed from the first fuel injection. [0053] Further, in comparison with the prior art shown in FIG.
- the data related to engine start in the engine control data stored in the EEPROM 28 is Because it is relatively small, it shortens the time from the rise of the power supply voltage due to engine startup to the start of regular fuel injection control by ECU2, thereby improving the engine startability during this time and the fuel efficiency of the engine It was possible to improve and control emission of harmful gases.
- FIG. 6 shows a flowchart of the control flow of the second embodiment of the present invention explained in FIG.
- the CPU 21 selectively reads only the data relating to the start stored in the EEPROM 28 (S24). Then, detection signals from various sensors (at least sensors relating to fuel injection) are input (S25), and calculations relating to ignition timing, fuel injection amount, etc. are performed based on the read-out data relating to starting and detection values of various sensors. By doing so, the first fuel injection is executed (S26).
- the CPU 21 reads all engine control data other than the selectively read data stored in advance in the EEPROM 28 (S27), and performs subsequent fuel injection control for each detection value of various sensors. And all the control data read in (S28).
- This normal fuel injection engine injection control is continued until an engine stop command is issued by turning off the ignition key or the like (S29).
- the CPU 21 The engine control data used or corrected in the fuel injection control during this period is saved to a predetermined address in the EEPROM 28 (S30).
- the engine starting force ECU can be used as a regular fuel according to the engine control method that is started by an external force. Since the period until the injection control is performed can be shortened, improvement in engine fuel efficiency and emission of harmful gases during this period can be suppressed while realizing improvement in engine startability.
- the present invention relates to a fuel injection control method and a fuel injection control device for an engine that have improved startability of an engine that is started by an external force such as a kick without having a knot. Have potential.
- FIG. 1 shows an example of the overall configuration of an engine to which the present invention is applied.
- FIG. 2 shows an example of a block configuration for explaining the ECU 2 constituting the fuel injection control device of the present invention.
- FIG. 3 shows an example of a timing chart for explaining a first embodiment of fuel injection control according to the present invention.
- FIG. 4 shows a flowchart of the control flow of the first embodiment of the present invention explained in FIG.
- FIG. 5 shows an example of a timing chart for explaining a second embodiment of the fuel injection control according to the present invention.
- FIG. 6 shows a flowchart of the control flow of the second embodiment of the present invention explained in FIG.
- FIG. 7 is a timing chart showing an example of fuel injection at the time of engine start that is activated by an external force according to the prior art.
- Power supply unit Power control unit: Input interface: Output interface: ROM
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- 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)
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JP2004-213731 | 2004-07-22 | ||
JP2004213731A JP2006029303A (ja) | 2004-07-22 | 2004-07-22 | エンジンの燃料噴射制御方法及び燃料噴射制御装置 |
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Families Citing this family (6)
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JP4173502B2 (ja) | 2005-08-05 | 2008-10-29 | 株式会社ケーヒン | 電子燃料噴射制御装置 |
EP1887204B1 (en) * | 2006-08-01 | 2017-01-04 | Keihin Corporation | Electronic fuel injection control device |
JP2009185717A (ja) | 2008-02-06 | 2009-08-20 | Yamaha Motor Co Ltd | 燃料噴射制御装置および車両 |
JP5343922B2 (ja) * | 2010-05-12 | 2013-11-13 | 株式会社デンソー | 燃料噴射制御装置 |
JP5116871B1 (ja) * | 2011-10-17 | 2013-01-09 | 三菱電機株式会社 | エンジンの記憶制御装置およびエンジンの記憶制御方法 |
JP5880192B2 (ja) * | 2012-03-23 | 2016-03-08 | スズキ株式会社 | 記憶制御装置、記憶制御方法およびプログラム |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888428A (ja) * | 1981-11-20 | 1983-05-26 | Honda Motor Co Ltd | 燃料噴射制御方法 |
JPH0192544A (ja) * | 1987-10-05 | 1989-04-11 | Mazda Motor Corp | エンジンの燃料制御装置 |
JPH062586A (ja) * | 1992-06-16 | 1994-01-11 | Honda Motor Co Ltd | エンジンのバッテリレス電子燃料噴射制御装置 |
JPH07208257A (ja) * | 1994-01-26 | 1995-08-08 | Nippondenso Co Ltd | エンジン制御装置及びエンジン制御方法 |
JPH10288070A (ja) * | 1997-04-10 | 1998-10-27 | Nissan Motor Co Ltd | 内燃機関の制御装置 |
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2004
- 2004-07-22 JP JP2004213731A patent/JP2006029303A/ja active Pending
-
2005
- 2005-07-07 WO PCT/JP2005/012582 patent/WO2006008975A1/ja active Application Filing
- 2005-07-07 CN CNA2005800297695A patent/CN101014761A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888428A (ja) * | 1981-11-20 | 1983-05-26 | Honda Motor Co Ltd | 燃料噴射制御方法 |
JPH0192544A (ja) * | 1987-10-05 | 1989-04-11 | Mazda Motor Corp | エンジンの燃料制御装置 |
JPH062586A (ja) * | 1992-06-16 | 1994-01-11 | Honda Motor Co Ltd | エンジンのバッテリレス電子燃料噴射制御装置 |
JPH07208257A (ja) * | 1994-01-26 | 1995-08-08 | Nippondenso Co Ltd | エンジン制御装置及びエンジン制御方法 |
JPH10288070A (ja) * | 1997-04-10 | 1998-10-27 | Nissan Motor Co Ltd | 内燃機関の制御装置 |
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CN101014761A (zh) | 2007-08-08 |
JP2006029303A (ja) | 2006-02-02 |
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