WO2020173406A1 - 用于车辆的催化器快速起燃方法、发动机总成及车辆 - Google Patents

用于车辆的催化器快速起燃方法、发动机总成及车辆 Download PDF

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Publication number
WO2020173406A1
WO2020173406A1 PCT/CN2020/076376 CN2020076376W WO2020173406A1 WO 2020173406 A1 WO2020173406 A1 WO 2020173406A1 CN 2020076376 W CN2020076376 W CN 2020076376W WO 2020173406 A1 WO2020173406 A1 WO 2020173406A1
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Prior art keywords
engine
speed
catalytic converter
vehicle
generator
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PCT/CN2020/076376
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English (en)
French (fr)
Inventor
张阳
苏博浩
角田宏
屈伟
王勇杰
吴超
王一望
常进才
杨旭飞
陈李
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Publication of WO2020173406A1 publication Critical patent/WO2020173406A1/zh
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0255Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D2041/026Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus using an external load, e.g. by increasing generator load or by changing the gear ratio

Definitions

  • the present invention relates to the field of automobiles, and in particular to a method for rapid light-off of a catalytic converter for a vehicle, an engine assembly and a vehicle. Background technique
  • the method to achieve rapid light-off of the catalyst is to increase the temperature or heat of the exhaust gas reaching the catalyst, so that the catalyst can reach the reaction temperature in a short time, thereby reducing the pollutants emitted during cold start.
  • the high-temperature exhaust gas is increased by delaying the ignition timing and increasing the idle speed of the engine, thereby increasing the heat energy reaching the catalyst.
  • the amount of delay of the ignition timing is affected by the combustion stability to a certain extent, and increasing the idle speed of the engine also It will be affected by safety and noise to a certain extent.
  • an object of the present invention is to provide a method for rapid light-off of a catalyst for a vehicle.
  • the method for rapid light-off of a catalyst can accelerate the speed at which the catalyst reaches the reaction temperature, reduce the emission of pollutants during the cold start of the engine, and make Vehicles are more environmentally friendly.
  • the present invention also provides an engine assembly adopting the above-mentioned catalytic converter quick light-off method.
  • the present invention also provides a vehicle adopting the above-mentioned catalytic converter rapid ignition method.
  • a generator is provided on the engine of the vehicle and the engine can selectively provide power to the generator
  • the method for rapid light-off of a catalyst includes at least The following steps: in the start phase, start the engine so that the engine speed reaches the preset speed; in the fast idle phase, stabilize the engine speed at the preset speed for a period of time, while controlling the engine to be the generator Provide motivation.
  • the engine is used to drive the generator during the fast idle phase of the engine, and the generator generates electricity to increase the load of the engine, and increase the load of the engine to increase the exhaust gas of the engine.
  • Exhaust volume the increase in exhaust gas volume can quickly heat the catalyst, the time period when the catalyst reaches the catalytic temperature.
  • the catalytic converter rapid light-off method can effectively reduce the pollutant emission during the cold start of the engine, the catalytic converter heats up quickly, and the engine runs stably.
  • the rotation speed of the engine is controlled to drop to the preset rotation speed after reaching a maximum value.
  • the preset rotation speed is 1000 rpm-1400 rpm.
  • the power generation of the generator gradually increases until the maximum power generation is reached.
  • the power generation of the generator maintains the maximum power generation for a period of time and then gradually decreases.
  • the method for rapid ignition of a catalytic converter further includes: in an idling stage, the engine speed drops to a normal idling speed.
  • the normal idle speed is 500 rpm-1000 rpm.
  • the method for rapid light-off of a catalyst for a vehicle further includes: in the idle phase, the engine speed decreases To a normal idle speed, where the idle speed phase is after the fast idle speed phase.
  • the power generation of the generator maintains the maximum power generation for a period of time and then gradually decreases.
  • the method for rapid ignition of a catalyst for a vehicle further includes: the idle phase, the engine The rotation speed drops to a normal idle speed, wherein the idle speed phase is after the fast idle speed phase.
  • the duration of the start stage is 4s-6s
  • the duration of the stage is a fast idle 10s-16s o engine assembly according to the following brief description of the present invention.
  • the engine speed is controlled to reach the maximum value and then drop to the preset speed
  • the duration of the startup phase is 4s-6s
  • the fast idle phase The duration is
  • the predetermined speed is 1000rpm- 1400rpm
  • the duration of the start stage is 4s-6s
  • the duration of the stage is a fast idle 10s-16s o
  • the engine assembly includes an engine and a generator arranged on the engine.
  • the engine is connected to the generator to increase the load of the engine, wherein the generator may be an integrated starter generator,
  • the integrated starter generator integrates the disc motor arranged on the main drive shaft of the engine.
  • the engine assembly can quickly increase the temperature of the catalyst during the start-up process, and emits less pollutants during cold start.
  • the performance of the engine assembly Stable and high reliability.
  • the vehicle according to the present invention adopts the aforementioned rapid light-off method of a catalytic converter for a vehicle. Since the vehicle according to the present invention adopts the rapid light-off method of the aforementioned embodiment, the catalytic converter of the vehicle can quickly reach the reaction temperature after a cold start. It reduces the pollutants emitted by the vehicle after cold start, makes the vehicle more environmentally friendly, and can meet the requirements of emission regulations.
  • Fig. 1 is a flowchart of a method for rapid light-off of a catalyst for a vehicle according to an embodiment of the present invention
  • Fig. 2 is a schematic diagram of engine speed, generator power generation and exhaust gas emission during engine startup according to an embodiment of the present invention. detailed description
  • the following describes a rapid ignition method of a catalyst for a vehicle according to an embodiment of the present invention with reference to FIGS. 1 to 2.
  • the vehicle according to the present invention is provided with a generator and the engine can optionally provide power to the generator.
  • the method for rapid catalytic converter light-off includes at least the following steps: a startup phase, starting the engine so that the engine speed reaches a preset speed; fast idle phase , The engine speed is stabilized at the preset speed for a period of time, and the engine is controlled to provide power to the generator.
  • Engine emission regulations are becoming stricter and stricter.
  • the catalyst needs to be ignited quickly.
  • the method to achieve rapid ignition of the catalyst is to increase the exhaust gas reaching the catalyst.
  • the temperature or heat of the catalyst can reach the temperature at which the exhaust gas can be catalyzed in a short time, thereby reducing the emission of pollutants during the cold start of the vehicle.
  • one method in order to make the catalytic converter ignite quickly, one method is to delay the ignition timing, but the delay amount of the delayed ignition timing is affected by the combustion stability, and the delayed ignition timing may cause the engine to fail to work normally; the other The method is to increase the idling speed of the engine, but increasing the idling speed of the engine may affect the safety of the engine, and increasing the idling speed of the engine may increase the noise of the vehicle.
  • the generator starts to work in the fast idling phase, and the engine provides power to the generator, which increases the load of the engine, thereby increasing the fuel injection volume of the engine, so that the engine can produce more More exhaust gas, an increase in exhaust gas can increase the heat reaching the catalyst, and a large amount of exhaust gas can quickly increase the temperature of the catalyst, thereby achieving the goal of zero catalyst rapid light-off.
  • the engine can gradually increase its speed under the drive of the starter motor, so that the engine speed reaches the preset speed during the start phase.
  • the generator does not work and the engine enters the fast idle phase, and the engine runs gradually After the engine speed stabilizes at the preset speed for a period of time, the generator gradually starts to work.
  • the engine provides power to the generator.
  • the generator increases the load of the engine during the process of generating electricity, and the sensor of the engine increases the load of the engine. , It will adjust the fuel injection volume of the engine. The greater the load, the greater the amount of exhaust gas produced by the larger the fuel injection volume.
  • the exhaust gas volume of the engine can be increased, and the exhaust gas heats the catalyst faster.
  • the heat received by the catalytic converter per unit time is also greatly increased, so that the catalytic converter can quickly reach the required reaction temperature, and the catalytic converter can effectively catalyze the exhaust gas produced by the engine to reduce pollutant emissions.
  • the engine is used to drive the generator during the fast idle phase of the engine, and the generator generates electricity to increase the load of the engine, and the exhaust gas of the engine is increased by increasing the load of the engine.
  • Exhaust volume the increase in exhaust gas volume can quickly heat the catalytic converter, and the time period when the catalytic converter reaches the catalytic temperature.
  • the catalytic converter rapid light-off method can effectively reduce the pollutant emission during the cold start of the engine, and the catalytic converter heats up quickly. The engine runs stably.
  • the engine speed is controlled to reach a maximum value and then drops to a preset speed.
  • the preset speed is 1000rpm-1400rpm.
  • the engine does not work on the generator.
  • the engine is running at In the initial stage, the engine has not completely reached a stable state during the start-up phase.
  • the operation of the engine is unstable. If the engine provides power to the generator at this time, it may cause the engine to shake and affect the start of the engine. Therefore, in the start-up phase The engine finally does not provide power to the generator.
  • the preset speed of the engine is 1200 rpm, and the speed of the engine in the fast idle phase gradually stabilizes, but the engine speed will still fluctuate to a certain extent.
  • Setting the preset speed to 1200 rpm can ensure that the engine is running
  • the fast idling stage quickly enters the state of smooth operation, shortening the time for the engine to enter the steady stage; set the preset engine speed to 1200rpm, at this speed, the load of the engine and the load added by the engine driving the generator can ensure the engine
  • the amount of exhaust gas discharged can quickly heat the catalytic converter, so that the catalytic converter can quickly heat up and reach the reaction temperature, reduce pollutants emitted during the cold start of the vehicle, and improve the environmental performance of the vehicle.
  • the power generation of the generator gradually increases until the maximum power generation is reached.
  • the power generation better than the generator gradually increases, and the power of the engine to drive the generator is gradually increased.
  • the load gradually increases in the fast idle phase, which can ensure the smooth operation of the engine during the fast idle phase, but not It is to increase the load of the engine in a very short time. If the load of the engine is increased in a very short time, the fuel injection amount of the engine may increase instantaneously. The increase of the fuel injection amount of the engine may affect the combustion stability of the engine. The engine’s combustion is not complete, and the engine may vibrate greatly, which affects the operation of the engine. Therefore, the generator’s power generation in the fast idle phase is gradually increased until the maximum power generation is reached, which can ensure the stable operation of the engine. Engine vibration.
  • the generator during the fast idle phase, keeps the maximum power generation for a period of time and then gradually decreases.
  • the generator reaches the maximum power generation during the fast idle phase to increase the load of the engine.
  • the temperature After the temperature reaches the reaction temperature, there is no need for a large exhaust gas volume.
  • the engine no longer provides power to the generator, and the generator stops working to reduce the load on the engine and make the engine enter the normal idle stage. , In order to reduce the fuel consumption of the vehicle.
  • the method for rapid light-off of a catalyst for a vehicle further includes an idle phase.
  • the idle phase is after the fast idle phase.
  • the working state and speed of the engine are gradually stabilized, and the engine no longer provides generators
  • the load of the engine is reduced, and the speed of the engine is gradually reduced to the speed of the engine at normal idling speed.
  • the normal idle speed of the engine is 500 rpm-1000 rpm. According to an embodiment of the present invention, the normal idle speed of the engine is 750 rpm. During the idle phase, the engine load decreases and the exhaust volume also drops to a normal level.
  • the duration of the startup phase is 4s-6s, and the duration of the fast idle phase is 10s-16s.
  • the startup phase is 0s-5s after the engine is started.
  • Time period, the fast idle phase is the time period of 5s-18s after the engine is started.
  • the car will start after the 20th second, so the end time of the fast idle phase is set at the 18th second ,
  • the generator stops generating electricity, leaving 2-3 seconds for the driver to prepare for gear shifting, so as to ensure the stable running state of the vehicle.
  • the battery connected to the generator is in an unsaturated state when it is started, which ensures that the electric energy generated by the generator can stably charge the battery, and ensures that the circuit between the generator and the battery is stable.
  • the engine assembly includes an engine and a generator arranged on the engine.
  • the engine is connected to the generator to increase the load of the engine, wherein the generator may be an integrated starter generator,
  • the integrated starter generator integrates the disc motor arranged on the main drive shaft of the engine.
  • the engine assembly can quickly increase the temperature of the catalyst during the start-up process, and emits less pollutants during cold start.
  • the performance of the engine assembly Stable and high reliability.
  • the vehicle according to the present invention adopts the aforementioned rapid light-off method of a catalytic converter for a vehicle. Since the vehicle according to the present invention adopts the rapid light-off method of the aforementioned embodiment, the catalytic converter of the vehicle can quickly reach the reaction temperature after a cold start. It reduces the pollutants emitted by the vehicle after cold start, makes the vehicle more environmentally friendly, and can meet the requirements of emission regulations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

一种用于车辆的催化器快速起燃方法,车辆的发动机上设置有发电机且发动机可选择地为发电机提供动力,催化器快速起燃方法至少包括以下步骤:启动阶段,启动发动机以使发动机的转速达到预设转速;快怠速阶段,将发动机的转速稳定在预设转速一段时间,同时控制发动机为发电机提供动力。还提供了一种发动机总成和车辆。

Description

用于车辆的催化器快速起燃方法、 发动机总成及车辆
相关申请的交叉引用
本申请要求长城汽车股份有限公司于 2019年 2月 25日提交的、 发明名称为“用于车辆的 催化器快速起燃方法、 发动机总成及车辆” 的、 中国专利申请号“201910137698. 4” 的优 先权。 技术领域
本发明涉及汽车领域, 尤其是涉及一种用于车辆的催化器快速起燃方法、发动机总 成及车辆。 背景技术
随着国六标准以的实施, 排放规定变的越来越严格, 为应对新的排放规定, 需要让 催化器快速的起燃。实现催化器快速起燃的方法就是提高到达催化器的排气温度或者热 量, 让催化剂在短时间内达到发生反应的温度, 从而降低冷启动时的排放污染物。 相关 技术中是通过延迟点火时刻和提高发动机怠速转速, 来增加高温排放废气, 从而增加到 达催化器的热能, 但是点火时刻延迟的量受燃烧稳定性影响有一定的限度, 提高发动机 的怠速转速也会受安全性、 噪音等影响有一定的限度。 发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。 为此, 本发明的一个目的在于 提出用于车辆的催化器快速起燃方法, 该催化器快速起燃方法可以加快催化器达到反应温 度的速度, 降低了发动机冷启动时的排放污染物, 使车辆更加环保。
本发明还提出一种采用上述催化器快速起燃方法的发动机总成。
本发明还提出一种采用上述催化器快速起燃方法的车辆。
根据本发明的用于车辆的催化器快速起燃方法, 所述车辆的发动机上设置有发电机且 所述发动机可选择地为所述发电机提供动力, 所述催化器快速起燃方法至少包括以下步骤: 启动阶段, 启动所述发动机以使所述发动机的转速达到预设转速; 快怠速阶段, 将所述发 动机的转速稳定在预设转速一段时间, 同时控制所述发动机为所述发电机提供动力。
根据本发明的用于车辆的催化器快速起燃方法, 通过在发动机快怠速阶段, 令发动机 驱动发电机, 通过发电机进行发电来提高发动机的负荷, 通过增大发动机的负荷来提高发 动机的废气排气量, 废气排气量增加可以快速加热催化器, 催化器达到催化温度的时间段, 该催化器快速起燃方法可以有效地降低发动机冷启动时的污染物排放, 催化器升温速度快, 发动机的运行稳定。
根据本发明的一个实施例, 在所述启动阶段时, 控制所述发动机的转速达到最高值后 下降到所述预设转速。
根据本发明的一个实施例, 所述预设转速为 1000rpm-1400rpm。
根据本发明的一个实施例, 在所述快怠速阶段时, 所述发电机的发电量逐渐增加直至 达到最大发电量。
根据本发明的一个实施例, 在所述快怠速阶段时, 所述发电机的发电量保持最大发电 量一段时间后逐渐下降。
根据本发明的一个实施例, 催化器快速起燃方法还包括: 怠速阶段, 发动机转速下降 至常规怠速。
根据本发明的一个实施例, 所述常规怠速为 500rpm-1000rpm。
根据本发明的一个实施例, 在所述快怠速阶段时, 所述发电机的发电量逐渐增加直至 达到最大发电量, 用于车辆的催化器快速起燃方法还包括: 怠速阶段, 发动机转速下降至 常规怠速, 其中, 所述怠速阶段在快怠速阶段之后。
根据本发明的一个实施例, 在所述快怠速阶段时, 所述发电机的发电量保持最大发 电量一段时间后逐渐下降, 用于车辆的催化器快速起燃方法还包括: 怠速阶段, 发动机转 速下降至常规怠速, 其中, 所述怠速阶段在快怠速阶段之后。
根据本发明的一个实施例, 所述启动阶段的持续时间为 4s-6s, 所述快怠速阶段的持续 时间为 10s-16s o 下面简单描述根据本发明的发动机总成。
根据本发明的一个实施例, 在所述启动阶段时, 控制所述发动机的转速达到最高值后 下降到所述预设转速, 所述启动阶段的持续时间为 4s-6s, 所述快怠速阶段的持续时间为
10s_16s o
根据本发明的一个实施例, 所述预设转速为 1000rpm- 1400rpm, 所述启动阶段的持续 时间为 4s-6s, 所述快怠速阶段的持续时间为 10s-16s o
下面简单描述根据本发明的发动机总成。
根据本发明的发动机总成包括发动机和设置在所述发动机上的发电机, 在发动机启动 过程中, 发动机与发电机相连以提升所述发动机的负荷, 其中发电机可以为集成式启动发 电机, 集成式启动发电机集成设置在发动机主驱动轴上的盘式电机, 该发动机总成在启动 的过程中可以快速地提高催化器的温度, 冷启动时排放的污染物少, 发动机总成的性能稳 定, 可靠性高。
下面简单描述根据本发明的车辆。 根据本发明的车辆采用上述的用于车辆的催化器快速起燃方法, 由于根据本发明的车 辆采用上述实施例的快速起燃方法, 因此该车辆在冷启动后催化器可以快速达到反应温度, 减少了车辆冷启动后排放的污染物, 使车辆更加环保, 可以满足排放法规的要求。
本发明的附加方面和优点将在下面的描述中部分给出, 部分将从下面的描述中变得明 显, 或通过本发明的实践了解到。 附图说明
附图是用来提供对本公开的进一步理解,并且构成说明书的一部分,与下面的具体实施 方式一起用于解释本公开, 但并不构成对本公开的限制。 在附图中:
图 1是根据本发明实施例的用于车辆的催化器快速起燃方法的流程图; 图 2是根据本发明实施例的发动机启动过程中发动机转速、发电机发电量以及排放 废气量的示意图。 具体实施方式
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其中自始至终相 同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附 图描述的实施例是示例性的, 仅用于解释本发明, 而不能理解为对本发明的限制。
下面参考图 1-图 2描述根据本发明实施例的用于车辆的催化器快速起燃方法。 根据本发明的车辆上设置有发电机且发动机可选择地为发电机提供动力, 催化器快 速起燃方法包括至少以下步骤:启动阶段,启动发动机以使发动机的转速达到预设转速; 快怠速阶段, 发动机的转速稳定在预设转速一段时间, 同时控制发动机为发电机提供动 力。
发动机的排放规定越来越严格, 为保证发动机满足新的排放标准, 减少车辆污染物 的排放, 需要让催化器快速的起燃, 实现催化器快速起燃的方法是增加到达催化器的排 放废气的温度或者热量, 让催化器在短时间内达到可以对尾气催化的温度, 从而降低车 辆冷启动时的排放污染物。
相关技术中, 为使催化器快速起燃, 采用的一种方法是延迟点火时刻, 但是延迟点 火时刻的延迟量受燃烧稳定性影响, 同时延迟点火时刻可能会导致发动机无法正常工 作; 另一种方法是提高发动机的怠速转速, 但提高发动机的怠速转速可能会影响到发动 机的安全性, 同时提高发动机的怠速转速可能会使车辆的噪音提高。
根据本发明的催化器快速起燃方法在快怠速阶段令发电机开始工作, 发动机为发电 机提供动力, 提高了发动机的负荷, 进而提高了发动机的喷油量, 使发动机可以产生更 多的废气, 废气的增多可以提高到达催化器的热量, 大量废气可以快速提高催化器的温 度, 进而达到零催化器快速起燃的目的。
在启动阶段, 发动机可以在启动电机的带动下逐渐提高转速, 以使发动机的转速在 启动阶段达到预设转速, 在启动阶段发电机不工作, 发动机进入到快怠速阶段后, 发动 机的运行逐渐平稳,在发动机的转速稳定在预设转速一段时间后,发电机逐渐开始工作, 发动机为发电机提供动力, 发电机在发电的过程中提高了发动机的负荷, 而发动机的传 感器在发动机的负荷提高后, 会调整发动机的喷油量, 负荷越大, 喷油量越大所产生的 废气量也就越多, 通过提高发动机负荷的方式可以提高发动机的排放废气量, 废气对催 化器的加热速度更快, 单位时间内催化器所接收的热量也大大提高, 使催化器可以快速 达到所需的反应温度,催化器可以有效地对发动机所产生的废气进行催化以减少污染物 的排放。
根据本发明的用于车辆的催化器快速起燃方法, 通过在发动机快怠速阶段, 令发动 机驱动发电机, 通过发电机进行发电来提高发动机的负荷, 通过增大发动机的负荷来提 高发动机的废气排气量, 废气排气量增加可以快速加热催化器, 催化器达到催化温度的 时间段, 该催化器快速起燃方法可以有效地降低发动机冷启动时的污染物排放, 催化器 升温速度快, 发动机的运行稳定。
根据本发明的一个实施例, 在启动阶段, 控制发动机的转速达到最高值后下降到预 设转速, 预设转速为 1000rpm- 1400rpm, 在启动阶段发动机并不对发电机做工, 此时发 动机的运转处于初始阶段, 发动机在启动阶段下运行还未完全达到平稳状态, 此时发动 机的运转不稳定, 如果此时发动机为发电机提供动力可能会导致发动机发生抖动, 影响 发动机的启动, 因此, 在启动阶段发动机最后不为发电机提供动力。
根据本发明的一个实施例, 发动机的预设转速为 1200rpm, 发动机在快怠速阶段的 转速逐渐趋于平稳, 但发动机的转速还是会有一定的波动, 将预设转速设置为 1200rpm 可以保证发动机在快怠速阶段快速的进入到平稳运行的状态,缩短发动机进入到平稳阶 段的时间; 将发动机的预设转速设置为 1200rpm, 在此转速下发动机的负荷以及发动机 驱动发电机所增加的负荷可以保证发动机所排出的废气量能过对催化器进行快速加热, 使催化器快速升温并达到反应温度, 降低车辆冷启动时排放的污染物, 提高车辆的环保 性能。
根据本发明的一个实施例, 在快怠速阶段时, 发电机的发电量逐渐增加直至达到最 大发电量,优于发电机的发电量逐渐增加,发动机驱动发电机做工的功率也是逐渐提高, 发动机的负荷在快怠速阶段逐渐提高, 可以保证发动机在快怠速阶段的运行平稳, 而不 是在极短的时间内提高发动机的负荷, 如果在极短的时间内提高发动机的负荷, 可能会 导致发动机的喷油量瞬间提高,发动机的喷油量提高后可能会影响到发动机的燃烧稳定 性, 导致发动机的燃烧不完全, 同时发动机可能会大幅振动, 影响发动机的工作, 因此 在快怠速阶段发电机的发电量采用逐渐增加直至达到最大发电量的方式,可以保证发动 机的运行稳定, 减少发动机的振动。
根据本发明的一个实施例, 在快怠速阶段时, 发电机的发电量保持最大发电量一段 时间后逐渐下降, 发电机在快怠速阶段达到最大的发电量, 以提高发动机的负荷, 在催 化器的温度达到可发生反应的温度后, 不再需要较大的废气排气量, 此时发动机不再为 发电机提供动力, 发电机停止工作, 以减少发动机的负荷, 使发动机进入到正常怠速阶 段, 以减少车辆的油耗。
根据本发明的一个实施例, 用于车辆的催化器快速起燃方法还包括怠速阶段, 怠速 阶段在快怠速阶段之后, 怠速阶段中发动机的工作状态以及转速逐渐稳定, 发动机不再 为发电机提供动力, 发动机的负荷减小, 发动机的转速逐渐降低至发动机常规怠速时的 转速。
其中, 发动机的常规怠速转速为 500rpm- 1000rpm, 根据本发明的一个实施例, 发动 机的常规怠速转速为 750rpm, 在怠速阶段, 发动机负荷下降, 排气量也随之下降到常 规水平。
根据本发明的一个实施例, 启动阶段的持续时间为 4s-6s , 快怠速阶段的持续时间 为 10s- 16s , 根据本发明的一个具体地实施例, 启动阶段为发动机启动后的 0s-5s的时间 段, 快怠速阶段为发动机启动后的 5s- 18s的时间段, 在美国 FTP驾驶循环中, 在第 20 秒以后, 车就要开始起动, 所以将快怠速阶段的结束时间设置在第 18秒, 使发电机就 停止发电, 为驾驶员留出 2-3秒的挂档等准备时间, 保证车辆的运行状态稳定。
根据本发明的一个实施例, 与发电机相连的电池在启动时为不饱和状态, 保证发电 机所产生的电能可以稳定地为电池进行充电, 确保发电机与电池之间的电路稳定。
下面简单描述根据本发明的发动机总成。
根据本发明的发动机总成包括发动机和设置在所述发动机上的发电机, 在发动机启 动过程中, 发动机与发电机相连以提升所述发动机的负荷, 其中发电机可以为集成式启 动发电机, 集成式启动发电机集成设置在发动机主驱动轴上的盘式电机, 该发动机总成 在启动的过程中可以快速地提高催化器的温度, 冷启动时排放的污染物少, 发动机总成 的性能稳定, 可靠性高。
下面简单描述根据本发明的车辆。 根据本发明的车辆采用上述的用于车辆的催化器快速起燃方法, 由于根据本发明的 车辆采用上述实施例的快速起燃方法,因此该车辆在冷启动后催化器可以快速达到反应 温度,减少了车辆冷启动后排放的污染物,使车辆更加环保,可以满足排放法规的要求。
在本发明的描述中, 需要理解的是, 术语“中心”、 “纵向”、 “横向”、 “长度”、 “宽度”、 “厚度”、 “上”、 “下”、 “前”、 “后”、 “左”、 “右”、 “竖直”、 “水平”、 “顶”、 “底”、 “内”、
“外”、 “顺时针”、 “逆时针”、 “轴向”、 “径向”、 “周向”等指示的方位或位置关系为基于 附图所示的方位或位置关系, 仅是为了便于描述本发明和简化描述, 而不是指示或暗示 所指的装置或元件必须具有特定的方位、 以特定的方位构造和操作, 因此不能理解为对 本发明的限制。
在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、
“具体示例”、 或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、 结构、 材料 或者特点包含于本发明的至少一个实施例或示例中。 在本说明书中, 对上述术语的示意性 表述不一定指的是相同的实施例或示例。 而且, 描述的具体特征、 结构、 材料或者特点可 以在任何的一个或多个实施例或示例中以合适的方式结合。 尽管已经示出和描述了本发明的实施例, 本领域的普通技术人员可以理解: 在不脱 离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型, 本发明的范围由权利要求及其等同物限定。

Claims

权利要求书
1、 一种用于车辆的催化器快速起燃方法, 所述车辆的发动机上设置有发电机且所 述发动机可选择地为所述发电机提供动力, 其特征在于, 所述催化器快速起燃方法至少 包括以下步骤:
启动阶段, 启动所述发动机以使所述发动机的转速达到预设转速;
快怠速阶段, 将所述发动机的转速稳定在预设转速一段时间, 同时控制所述发动机 为所述发电机提供动力。
2、 根据权利要求 1 所述的用于车辆的催化器快速起燃方法, 其特征在于, 在所述 启动阶段时, 控制所述发动机的转速达到最高值后下降到所述预设转速。
3、 根据权利要求 1或 2所述的用于车辆的催化器快速起燃方法, 其特征在于, 所 述预设转速为 1000rpm- 1400rpm。
4、 根据权利要求 1 所述的用于车辆的催化器快速起燃方法, 其特征在于, 在所述 快怠速阶段时, 所述发电机的发电量逐渐增加直至达到最大发电量。
5、 根据权利要求 4所述的用于车辆的催化器快速起燃方法, 其特征在于, 在所述 快怠速阶段时, 所述发电机的发电量保持最大发电量一段时间后逐渐下降。
6、 根据权利要求 1所述的用于车辆的催化器快速起燃方法, 其特征在于, 还包括: 怠速阶段, 发动机转速下降至常规怠速, 其中, 所述怠速阶段在快怠速阶段之后。
7、 根据权利要求 6所述的用于车辆的催化器快速起燃方法, 其特征在于, 所述常 规怠速为 500rpm- 1000rpm。
8、 根据权利要求 4所述的用于车辆的催化器快速起燃方法, 其特征在于, 还包括: 怠速阶段, 发动机转速下降至常规怠速, 其中, 所述怠速阶段在快怠速阶段之后。
9、 根据权利要求 5所述的用于车辆的催化器快速起燃方法, 其特征在于, 还包括: 怠速阶段, 发动机转速下降至常规怠速, 其中, 所述怠速阶段在快怠速阶段之后。
10、 根据权利要求 1所述的用于车辆的催化器快速起燃方法, 其特征在于, 所述启 动阶段的持续时间为 4s-6s, 所述快怠速阶段的持续时间为 10s- 16s o
1 1、 根据权利要求 2所述的用于车辆的催化器快速起燃方法, 其特征在于, 所述启 动阶段的持续时间为 4s-6s, 所述快怠速阶段的持续时间为 10s- 16s o
12、 根据权利要求 3所述的用于车辆的催化器快速起燃方法, 其特征在于, 所述启 动阶段的持续时间为 4s-6s, 所述快怠速阶段的持续时间为 10s- 16s o
13、 一种发动机总成, 其特征在于, 包括: 发动机和设置在所述发动机上的发电机, 在所述发动机启动过程中, 所述发动机与所述发电机相连以提升所述发动机的负荷。
14、 一种车辆, 其特征在于, 包括权利要求 1- 13 中任一项所述的催化器快速起燃 方法。
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CN110748426B (zh) * 2019-02-25 2021-08-20 长城汽车股份有限公司 用于车辆的催化器快速起燃方法、发动机总成及车辆
CN111305935B (zh) * 2020-04-09 2021-10-29 东风汽车集团有限公司 一种利用发动机最低转速加速催化器起燃过程的方法
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035304A1 (de) * 1999-03-05 2000-09-13 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum schnelleren Aufheizen eines Katalysators
JP2004245121A (ja) * 2003-02-13 2004-09-02 Nissan Motor Co Ltd エンジン始動装置
JP2016166584A (ja) * 2015-03-10 2016-09-15 富士重工業株式会社 自動車
CN108223181A (zh) * 2017-12-20 2018-06-29 中国第汽车股份有限公司 冷起动减排策略监测系统
CN110748426A (zh) * 2019-02-25 2020-02-04 长城汽车股份有限公司 用于车辆的催化器快速起燃方法、发动机总成及车辆

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4013594B2 (ja) * 2002-03-05 2007-11-28 日産自動車株式会社 エンジンのアイドリング制御装置
JP4410454B2 (ja) * 2002-04-03 2010-02-03 三菱自動車工業株式会社 内燃機関のアイドル回転数制御装置
JP2010163931A (ja) * 2009-01-14 2010-07-29 Fuji Heavy Ind Ltd エンジンの制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035304A1 (de) * 1999-03-05 2000-09-13 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum schnelleren Aufheizen eines Katalysators
JP2004245121A (ja) * 2003-02-13 2004-09-02 Nissan Motor Co Ltd エンジン始動装置
JP2016166584A (ja) * 2015-03-10 2016-09-15 富士重工業株式会社 自動車
CN108223181A (zh) * 2017-12-20 2018-06-29 中国第汽车股份有限公司 冷起动减排策略监测系统
CN110748426A (zh) * 2019-02-25 2020-02-04 长城汽车股份有限公司 用于车辆的催化器快速起燃方法、发动机总成及车辆

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