WO2009065329A1 - Dispositif de démarrage à froid et procédé pour moteurs à l'éthanol - Google Patents

Dispositif de démarrage à froid et procédé pour moteurs à l'éthanol Download PDF

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Publication number
WO2009065329A1
WO2009065329A1 PCT/CN2008/072720 CN2008072720W WO2009065329A1 WO 2009065329 A1 WO2009065329 A1 WO 2009065329A1 CN 2008072720 W CN2008072720 W CN 2008072720W WO 2009065329 A1 WO2009065329 A1 WO 2009065329A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
cold start
solenoid valve
temperature sensor
water temperature
Prior art date
Application number
PCT/CN2008/072720
Other languages
English (en)
Chinese (zh)
Inventor
Faqing Xiang
Original Assignee
Chery Automobile Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co., Ltd. filed Critical Chery Automobile Co., Ltd.
Publication of WO2009065329A1 publication Critical patent/WO2009065329A1/fr

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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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants

Definitions

  • the invention relates to the technical field of engines, in particular to an ethanol engine cold start device and method. Background technique
  • ethanol vehicles on the market mostly use ethanol gasoline mixed with a low proportion of ethanol and a high proportion of gasoline as a fuel. Because the proportion of ethanol in the ethanol gasoline is very low, there is no obvious problem of difficulty in engine cold start. However, as the proportion of ethanol in ethanol gasoline increases, the cold start performance of ethanol gasoline will become worse and worse. Therefore, the use of this ethanol gasoline as a fuel may cause difficulty in cold start of the engine.
  • An object of the present invention is to provide an ethanol engine cold start device and method for improving the difficulty of cold start of an engine caused by ethanol gasoline as a fuel.
  • the invention provides an ethanol engine cold start device, which comprises an engine cylinder, a cylinder head, a spark plug, a heater (5), a solenoid valve (4), a cold start signal lamp (3), a water temperature sensor (7), and a heater temperature.
  • the sensor (6), the heater (5), the solenoid valve (4) and the battery (1) and the key switch (2) are connected in series in one circuit; the heater (5) is mounted on the gas red inner cylinder cover (9) close to The position of the spark plug (10) is used to heat the cylinder; the water temperature sensor (7) is used to detect the water temperature; the heater temperature sensor (6) is used to detect the heater (5) temperature; the cold start signal (3) is used to monitor The series circuit is turned on and off; an engine electronic control unit (8) is operative to enable the device based on the received water temperature and the heater temperature control.
  • the engine electronic control unit (8) turns on the solenoid valve.
  • the series circuit composed of the heater (5), the solenoid valve (4) and the battery (1) and the key switch (2) is turned on, and the heater (5) starts heating.
  • the engine electronic control unit (8) opens the solenoid valve (4), the series circuit is turned off, and the heater (5) is terminated by heating.
  • the heating time is within 10 seconds. Preferably, the heating time is 8 seconds.
  • the present invention also provides an ethanol engine cold start device, including an engine cylinder, a cylinder head, a spark plug, a heater (5), a solenoid valve (4), a cold start signal lamp (3), a water temperature sensor (7), and heating.
  • the solenoid (4), the solenoid valve (4) and the battery (1) and the key switch (2) are connected in series in one circuit;
  • the heater (5) is mounted on the cylinder head (9) near the spark plug (10), Used to heat the cylinder;
  • the water temperature sensor (7) is used to detect the water temperature;
  • the cold start signal (3) is used to monitor the conduction and shutdown of the series circuit;
  • the engine electronic control unit (8) is used to receive the The water temperature and the heating time of the heater (5) control the activation of the device.
  • the engine electronic control unit (8) turns on the solenoid valve; the heater (5), the solenoid valve (4) ) The series circuit consisting of the battery (1) and the key switch (2) is turned on, and the heater starts heating.
  • the heating time is within 10 seconds and the heater temperature is greater than 700 °C.
  • the engine electronic control unit (8) opens the solenoid valve (4), the series circuit is turned off, and the heater (5) is terminated by heating.
  • the corresponding invention also provides a method for cold start using an ethanol engine cold start device, which includes an engine gas red, a cylinder head, a spark plug, a heater (5), a solenoid valve (4), and a cold start signal lamp ( 3), water temperature sensor (7), and heater temperature sensor (6), heater (5), solenoid valve (4) and battery (1) and key switch (2) are connected in series in one circuit; heater (5 Installed in the cylinder head (9) near the spark plug (10) for heating the cylinder; the water temperature sensor (7) is used to detect the water temperature; the heater temperature sensor (6) is used to detect the heater temperature; a cold start signal (3) for monitoring the turning on and off of the series circuit; the method comprising the steps of: turning on the key switch (2); when the temperature of the water temperature sensor (7) is below 15 ° C, The engine electronic control unit (8) turns on the solenoid valve, the heater (5), the solenoid valve (4) is turned on with the battery (1) and the key switch (2), the heater (5) starts heating; when the heater
  • the heating time is greater than 0 seconds and less than 10 seconds.
  • the heating time is 8 seconds.
  • the corresponding invention also provides a method for cold start using an ethanol engine cold start device.
  • the cold start device includes an engine gas red, a cylinder head, a spark plug, a heater (5), a solenoid valve (4), a cold start signal lamp (3), a water temperature sensor (7), a heater (5), and a solenoid valve (4).
  • the heater (5) is connected in series with a battery ( 1 ) and a key switch (2) in a circuit; the heater (5) is mounted on the cylinder head (9) near the spark plug (10) for heating the cylinder; water temperature sensor (7) used to detect the water temperature; a cold start signal is used to monitor the conduction and shutdown of the series circuit; the method includes the steps of: turning on the key switch (2); when the temperature of the water temperature sensor (7) is 15 Below °C, the engine electronic control unit (8) turns on the solenoid valve (4), the heater (5), the solenoid valve (4) is connected to the battery (1) and the key switch (2), and the heater (5) Start heating; when the heating time is greater than 0 seconds, and less than 10 seconds, the engine electronic control unit (8) disconnects the solenoid valve (4), the heater (5), the solenoid valve (4) and the battery (1) and the key switch ( 2) Disconnect, the heater (5) is terminated by heating.
  • the heating time is 8 seconds.
  • Figure 1 Schematic diagram of the first embodiment of the ethanol cold start device
  • Figure 2 Circuit diagram of a second embodiment of an ethanol cold start device
  • Figure 3 Location map of the heater installation.
  • the ethanol engine cold start device as shown in FIG. 1, includes a battery 1, a key Switch 2, cold start signal lamp 3, solenoid valve 4, heater 5, heater temperature sensor 6, water temperature sensor 7, and engine electronic control unit (ECU) 8.
  • ECU engine electronic control unit
  • the battery 1, the key switch 2, the cold start signal lamp 3, the solenoid valve 4, and the heater 5 are connected in series in one circuit.
  • the solenoid valve 4 can control the series circuit to be turned on or off.
  • the solenoid valve 4 is turned on and the key switch 2 is turned off (ie, the key is twisted to the power-on position)
  • the series circuit is turned on, the battery 1 supplies power to the heater 5, the heater 5 starts to heat up, and the cold start signal lamp 3 is lit;
  • the series circuit is turned off the battery 1 stops supplying power to the heater 5, the heater 5 is warmed up, and the cold start signal lamp 3 is turned off.
  • the heater 5 is used to heat the air inside the cylinder.
  • the heater 5 is mounted on the gas-red cylinder head 9 near the spark plug 10 as shown in FIG.
  • the engine cold start is difficult because the temperature of the gas red is too low, making the spark plug 10 difficult to ignite, so that the heater 5 is mounted at the position of the spark plug 10 so that the temperature near the spark plug 10 reaches the ignition temperature, thereby smoothly igniting.
  • the cylinder head 9 facilitates the mounting of the heater 5.
  • the heater 5 can also be mounted at other locations within the cylinder.
  • the heater temperature sensor 6 measures the temperature of the heater 5 and feeds this temperature back to the engine electronic control unit (ECU) 8. Since the temperature of the heater 5 reaches a certain level, the temperature in the gas red also reaches the corresponding temperature, so Measuring the temperature of the heater 5 can reflect the temperature of the gas red.
  • ECU engine electronic control unit
  • the water temperature sensor 7 is used to measure the water temperature of the coolant. After the vehicle is parked for a long time, the temperature in the gas red is equal to the ambient temperature, and the water temperature of the coolant is equal to the temperature of the environment, so the water temperature and the temperature in the gas red are the same, thereby measuring The water temperature can know the temperature inside the cylinder.
  • An engine electronic control unit (ECU) 8 is used to turn the series circuit on or off based on the temperature fed back by the heater temperature sensor 6.
  • the engine electronic control unit (ECU) 8 controls the solenoid valve 4 based on the temperature fed back from the water temperature sensor 7 and the heater temperature sensor 6, so that the series circuit is turned on or off.
  • the cold start signal lamp 3 is used to monitor the operation of the heater 5. If the cold start device of the ethanol engine fails, the heater 5 may be dangerously heated, so it can be monitored by the cold start signal 3, and when the above situation occurs, it can be disconnected.
  • the key switch 2 stops the operation of the ethanol engine cold start device.
  • the key Before the car needs to be started, the key will be inserted into the key switch 2, and the key will be turned off to turn off the key switch 2 (ie, the key is twisted to the power-on position).
  • the ethanol engine cold start device starts to work, the steps are as follows:
  • the water temperature sensor monitors the water temperature and feeds the water temperature back to the engine electronic control unit (ECU) 8 .
  • the engine electronic control unit (ECU) 8 receives the water temperature fed back from the water temperature sensor 7, and then determines whether it is necessary to heat the cylinder. Because the ethanol gasoline fuel is used, when the cylinder is below 15 ° C, the engine is difficult to start, so the control unit (ECU) 8 determines that the temperature of the water temperature sensor 7 is below 15 ° C, the engine electronic control unit (ECU) 8 will The solenoid valve 4 is turned on, so that the series circuit composed of the battery 1, the key switch 2, the cold start signal lamp 3, the solenoid valve 4, and the heater 5 is turned on.
  • the heater 5 starts to heat up using the electrical energy of the battery.
  • the heater temperature sensor 6 monitors the temperature of the heater 5 and feeds back the temperature of the heater 5 to the engine electronic control unit (ECU) 8.
  • ECU engine electronic control unit
  • the engine electronic control unit (ECU) 8 receives the temperature fed back by the heater temperature sensor 6.
  • the heater 5 when the heater 5 reaches 700 ° C or higher, the engine ignition requirement can be met, and when the temperature is greater than 700 ° C, the temperature is disconnected.
  • the solenoid valve 4, the series circuit is disconnected, and the heater 5 is stopped by heating.
  • the heater 5 can increase the temperature of the heater to 700 ° C or higher, thereby igniting the engine. Therefore, the heating time in the embodiment is less than 10 s, and when the voltage is about 8 s, the series circuit is disconnected. The heater 5 is stopped by heating.
  • the present invention achieves the purpose of smooth ignition at a low temperature. Because of the improved cold start performance, it promotes emissions and economic improvements.
  • the ethanol engine cold start device includes a battery 1, a key switch 2, a cold start signal lamp 3, a solenoid valve 4, a heater 5, a water temperature sensor 7, and an engine electronic control unit (ECU). 8. Wherein the heater 5, the solenoid valve 4 and the battery 1 and the key switch 2 are connected in series in one circuit;
  • the heater 5 is mounted on the gas red inner cylinder head 9 near the spark plug 10 for heating the cylinder;
  • the water temperature sensor 7 is used to detect the water temperature;
  • the engine electronic control unit 8 can be used to time the heating time of the heater; in the present embodiment, the engine electronic control unit 8 includes a timing unit for timing the heating time of the heater 5;
  • a cold start signal lamp 3 is used to monitor the turn-on and turn-off of the series circuit
  • the engine electronic control unit 8 controls the conduction of the heater 5, the electromagnetic valve 4, the battery 1 and the key switch 2 according to the water temperature detected by the water temperature sensor; and is heated according to the heater 5 fed back by the timing unit.
  • the time is judged to control the disconnection of the heater 5, the solenoid valve 4, and the battery 1 and the key switch 2.
  • Those skilled in the art can determine the specific heating time required to reach the required temperature according to the ambient temperature, the heater resistance value, and the voltage.
  • the ambient temperature can be measured and fed back to the ECU through the water temperature sensor.
  • the voltage is generally 12V, and the heater is blocked. The value can be adjusted according to the actual situation.
  • the engine electronic control unit (ECU) 8 receives the water temperature fed back by the water temperature sensor 7, and then determines whether it is necessary to heat the gas red. Since the ethanol gasoline fuel is used, when the cylinder is below 15 ° C, the engine is difficult to start, so the ECU 8 determines that the temperature fed back by the water temperature sensor 7 is below 15 ° C, the ECU 8 turns on the solenoid valve 4, so that the battery 1 The series circuit composed of the key switch 2, the cold start signal lamp 3, the solenoid valve 4, and the heater 5 is turned on, and the timing unit starts timing.
  • the ECU 8 receives the time fed by the timing unit, for example, the heating time is greater than 0 seconds, and is less than or equal to 10 seconds, the ECU 8 opens the solenoid valve 4, disconnects the heater 5 from the battery 1, and the heater 5 is terminated.
  • the heater 5 in 10S, the heater 5 can raise its own temperature to above 700 ° C, thereby igniting the engine. Therefore, the heating time in this embodiment is within 10 S, and the heating time is to control the heating temperature (0).
  • the series circuit is turned off, the heater 5 is stopped by heating, and the timing unit is cleared.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne un dispositif de démarrage à froid et un procédé pour moteurs à l'éthanol. Le dispositif comporte une culasse de moteur, un dispositif de chauffage (5), un voyant de signalisation de démarrage à froid (3), une électrovalve (4), un capteur de température de l'eau (7) et un capteur de température du dispositif de chauffage (6). Le dispositif de chauffage (5) est posé sur la culasse et à proximité de la bougie d'allumage (10), et le dispositif de chauffage (5), l'électrovalve (4), le voyant de signalisation de démarrage à froid (3), un accumulateur (1) et un interrupteur à clé sont connectés en série dans un circuit. Une unité de commande électronique de moteur (8) peut déterminer si le dispositif doit être démarré en lisant la température envoyée par le capteur de température d'eau (7). Lorsque la température envoyée par le capteur de température d'eau est inférieure à 15 °C, l'unité de commande électronique de moteur (8) met l'électrovalve (4) en marche. Lorsque l'interrupteur à clé est fermé, le circuit est ouvert, et la température du dispositif de chauffage (5) est élevée à 700 °C en 10 secondes par l'énergie de l'accumulateur et l'air dans le cylindre est chauffé par la même occasion. L'allumage est ainsi réalisé avec succès à basse température.
PCT/CN2008/072720 2007-10-23 2008-10-16 Dispositif de démarrage à froid et procédé pour moteurs à l'éthanol WO2009065329A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2007101642778A CN100572795C (zh) 2007-10-23 2007-10-23 一种乙醇发动机冷启动装置及方法
CN200710164277.8 2007-10-23

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WO2009065329A1 true WO2009065329A1 (fr) 2009-05-28

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WO (1) WO2009065329A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117108419A (zh) * 2023-10-19 2023-11-24 潍柴动力股份有限公司 一种甲醇发动机的甲醇加热控制方法、装置及系统

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CN100572795C (zh) * 2007-10-23 2009-12-23 奇瑞汽车股份有限公司 一种乙醇发动机冷启动装置及方法
US8046153B2 (en) * 2010-07-20 2011-10-25 Ford Global Technologies, Llc Compensation for oxygenated fuels in a diesel engine
CN102431434B (zh) * 2011-11-22 2016-06-22 昆明新能源发展有限公司 氢电混合动力汽车
CN102852691B (zh) * 2012-09-05 2015-02-25 安徽江淮汽车股份有限公司 一种灵活燃料汽车的冷启动方法及系统
CN109026490B (zh) * 2018-08-23 2024-09-03 湖北鹰牌动力科技有限公司 一种用于柴油发动机冷启动的双流道预热装置

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JPS5752665A (en) * 1980-09-16 1982-03-29 Mazda Motor Corp Intake system of engine
JPS61138826A (ja) * 1984-12-11 1986-06-26 Isuzu Motors Ltd 始動暖機装置
AT395265B (de) * 1989-06-20 1992-11-10 Avl Verbrennungskraft Messtech Kaltstarteinrichtung fuer mit alkohol-kraftstoff betriebene brennkraftmaschinen
GB2257729A (en) * 1991-07-16 1993-01-20 Ava Int Corp Subsurface well safety valve
CN2561949Y (zh) * 2002-07-18 2003-07-23 宋喜明 发动机进气温度自动控制加热器
CN2615357Y (zh) * 2003-04-18 2004-05-12 胡建保 汽车冷启动预热装置
CN2750069Y (zh) * 2004-10-12 2006-01-04 天津大学 电喷甲醇发动机冷起动装置
CN101144456A (zh) * 2007-10-23 2008-03-19 奇瑞汽车有限公司 一种乙醇发动机冷启动装置及方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5752665A (en) * 1980-09-16 1982-03-29 Mazda Motor Corp Intake system of engine
JPS61138826A (ja) * 1984-12-11 1986-06-26 Isuzu Motors Ltd 始動暖機装置
AT395265B (de) * 1989-06-20 1992-11-10 Avl Verbrennungskraft Messtech Kaltstarteinrichtung fuer mit alkohol-kraftstoff betriebene brennkraftmaschinen
GB2257729A (en) * 1991-07-16 1993-01-20 Ava Int Corp Subsurface well safety valve
CN2561949Y (zh) * 2002-07-18 2003-07-23 宋喜明 发动机进气温度自动控制加热器
CN2615357Y (zh) * 2003-04-18 2004-05-12 胡建保 汽车冷启动预热装置
CN2750069Y (zh) * 2004-10-12 2006-01-04 天津大学 电喷甲醇发动机冷起动装置
CN101144456A (zh) * 2007-10-23 2008-03-19 奇瑞汽车有限公司 一种乙醇发动机冷启动装置及方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117108419A (zh) * 2023-10-19 2023-11-24 潍柴动力股份有限公司 一种甲醇发动机的甲醇加热控制方法、装置及系统

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CN101144456A (zh) 2008-03-19

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