WO2021057304A1 - 可变压缩比发动机的控制方法及装置 - Google Patents

可变压缩比发动机的控制方法及装置 Download PDF

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Publication number
WO2021057304A1
WO2021057304A1 PCT/CN2020/108813 CN2020108813W WO2021057304A1 WO 2021057304 A1 WO2021057304 A1 WO 2021057304A1 CN 2020108813 W CN2020108813 W CN 2020108813W WO 2021057304 A1 WO2021057304 A1 WO 2021057304A1
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Prior art keywords
compression ratio
engine
warm
target
variable compression
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PCT/CN2020/108813
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English (en)
French (fr)
Inventor
王文宾
陈利明
李贤坤
张振
左坤峰
纪雷
陈伟
晏双鹤
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长城汽车股份有限公司
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Publication of WO2021057304A1 publication Critical patent/WO2021057304A1/zh

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    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
    • 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
    • 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
    • F02D2200/021—Engine temperature
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed

Definitions

  • the present invention relates to the technical field of engines, in particular to a control method and device for a variable compression ratio engine.
  • the engine includes a conventional engine and a variable compression ratio (Varriable Compress Ratio, VCR) engine.
  • VCR variable Compress Ratio
  • the VCR engine can reduce fuel consumption and improve emissions by controlling the actual compression ratio, thereby improving the power and economy of the VCR engine.
  • the warm-up process of the VCR engine will have an important impact on the fuel consumption and emissions of the VCR engine, so the shorter the completion time of the warm-up process, the better.
  • most of them can use an electronic thermostat or optimize the cooling cycle pipeline to shorten the warm-up time.
  • the two are mainly optimizations of traditional engine piping or structure, so their impact on the warm-up process is very limited.
  • related technologies applied to traditional engines cannot effectively shorten the warm-up time.
  • the present invention aims to provide a control method and device for a variable compression ratio engine to effectively shorten the warm-up time of the VCR engine.
  • the first aspect provides a warm-up control method based on a variable compression ratio engine, which is applied to a warm-up control device, the warm-up control device is connected to the variable compression ratio engine, and the method includes:
  • the first engine temperature and engine speed of the current variable compression ratio engine are acquired, and the warm-up is determined according to the first engine temperature and the engine speed Basic value of target compression ratio;
  • variable compression ratio engine is controlled to warm up.
  • the method for controlling a variable compression ratio engine first, when a successful cold start of the variable compression ratio engine is detected, the first engine temperature and engine speed of the current variable compression ratio engine are acquired, and the Determine the basic value of the warm-up target compression ratio based on the engine temperature and engine speed, and then obtain the engine load of the current variable compression ratio engine, and determine the basic value of the ignition advance angle according to the engine load and engine speed. The next step is to obtain the current variable compression ratio.
  • the actual warm-up compression ratio of the engine and determine the ignition advance angle correction value according to the warm-up actual compression ratio, add the basic value of the ignition advance angle and the ignition advance angle correction value to obtain the target ignition advance angle, and compress according to the warm-up target Control the variable compression ratio engine to warm up compared to the base value and the target ignition advance angle.
  • the warm-up control device can add the basic value of the ignition advance angle and the correction value of the ignition advance angle to obtain the target ignition advance angle, that is, the ignition advance angle can be increased, and the gas expansion stroke time can be prolonged. , Increase the maximum temperature in the cylinder, thereby speeding up the warm-up speed, and at the same time improving the emissions during the warm-up process.
  • Another object of the present invention is to provide a control device for a variable compression ratio engine to effectively shorten the warm-up time of the VCR engine.
  • a second aspect provides a warm-up control device based on a variable compression ratio engine, the warm-up control device is used to control the variable compression ratio engine, and the warm-up control device includes:
  • a memory in which computer-readable codes are stored
  • the warm-up control device when the computer-readable code is executed by the one or more processors, the warm-up control device performs the following operations, including: when the variable compression ratio engine is cold-started When successful, obtain the current first engine temperature and engine speed of the variable compression ratio engine, and determine the warm-up target compression ratio base value according to the first engine temperature and the engine speed;
  • variable compression ratio engine is controlled to warm up.
  • controlling the variable compression ratio engine to perform a warm-up operation according to the warm-up target compression ratio base value and the target ignition advance angle includes:
  • variable compression ratio engine is controlled to warm up.
  • the operation further includes:
  • the current second engine temperature of the variable compression ratio engine is acquired, and the target starting compression ratio is determined according to the second engine temperature;
  • the target starting compression ratio is greater than the engine base compression ratio;
  • the second engine temperature is less than the first engine temperature;
  • variable compression ratio engine is controlled to perform a cold start.
  • the operation further includes:
  • variable compression ratio engine is controlled to perform a cold start.
  • the operation further includes:
  • the third aspect provides an engine assembly, including:
  • variable compression ratio engine and a warm-up control device connected to the variable compression ratio engine, wherein the warm-up control device executes the warm-up control device based on the variable compression ratio engine according to any one of the second aspect.
  • a fourth aspect provides a vehicle including the engine assembly, and the vehicle can execute the engine assembly described in any one of the third aspect.
  • a fifth aspect provides a computer-readable medium in which computer-readable code is stored.
  • the computing processing device executes the computer-readable medium described in any one of the first aspects.
  • a warm-up control method for a variable compression ratio engine is described in any one of the first aspects.
  • Fig. 1 schematically shows a flow chart of a warm-up control method based on a variable compression ratio engine provided by the first embodiment of the present invention
  • Fig. 2 schematically shows a flowchart of another warm-up control method based on a variable compression ratio engine provided by the second embodiment of the present invention
  • Fig. 3 schematically shows a structural block diagram of a warm-up control device based on a variable compression ratio engine provided by the third embodiment of the present invention
  • Fig. 4 schematically shows a structural block diagram of a warm-up control device based on a variable compression ratio engine provided by the fourth embodiment of the present invention
  • Fig. 5 schematically shows a structural block diagram of an engine component provided by an embodiment of the present invention
  • Fig. 6 schematically shows a block diagram of a computing processing device for executing the method according to the present invention.
  • Fig. 7 schematically shows a storage unit for holding or carrying program codes for implementing the method according to the present invention.
  • Fig. 1 is a flowchart of a warm-up control method based on a variable compression ratio engine provided by the first embodiment of the present invention, which is applied to a warm-up control device, a warm-up control device and a variable compression ratio engine (hereinafter referred to as a VCR engine) Connection, as shown in Figure 1, the method includes:
  • Step 101 When a successful cold start of the VCR engine is detected, obtain the current first engine temperature and engine speed of the VCR engine, and determine the warm-up target compression ratio base value according to the first engine temperature and engine speed.
  • the first engine temperature refers to the temperature corresponding to the VCR engine when the VCR engine is successfully cold-started.
  • the warm-up control device can obtain the first engine temperature and engine speed of the VCR engine at the current moment, and determine the warm-up target compression ratio base value according to the first engine temperature and engine speed.
  • Step 102 Obtain the current engine load of the VCR engine, and determine the basic value of the ignition advance angle according to the engine load and the engine speed.
  • the warm-up control device can obtain the current engine load of the VCR engine.
  • the basic value of the ignition advance angle is positively correlated with the engine speed, that is, the basic value of the ignition advance angle increases with the engine speed.
  • the increase of the rotation speed increases, and the basic value of the ignition advance angle decreases with the decrease of the engine rotation speed.
  • the basic value of the ignition advance angle when the engine speed is constant, the basic value of the ignition advance angle is negatively correlated with the engine load, that is, the basic value of the ignition advance angle decreases as the engine load increases, and the basic value of the ignition advance angle Increases as the engine load decreases.
  • Step 103 Obtain the actual warm-up compression ratio of the current VCR engine, and determine the ignition advance angle correction value according to the warm-up actual compression ratio.
  • the current warm-up actual compression ratio can be collected by the Motor Control Unit (MCU), and then the warm-up actual compression ratio that can be collected by the MCU is sent to the warm-up control device.
  • the warm-up control device can be an engine controller (Electronic Control Unit, ECU).
  • ECU Electronic Control Unit
  • the ignition advance angle correction value is positively correlated with the current warm-up actual compression ratio, that is, the ignition advance angle correction value increases as the current warm-up actual compression ratio increases, and the ignition advance The angle correction value decreases as the actual compression ratio of the current warm-up engine decreases.
  • Step 104 Add the ignition advance angle base value and the ignition advance angle correction value to obtain the target ignition advance angle.
  • the obtained target ignition advance angle is greater than the ignition advance angle base value.
  • Step 105 Control the VCR engine to warm up according to the base value of the warm-up target compression ratio and the target ignition advance angle.
  • the warm-up target compression ratio base value can be used as the actual operating-condition demand compression ratio
  • the warm-up control device can control the VCR engine to warm up the target compression ratio base value and target compression ratio.
  • the actual operating conditions demand compression ratio can be determined according to the basic value of the warm-up target compression ratio, and the warm-up control device can control the VCR engine to demand compression under the actual operating conditions.
  • the above method can also be used to control the VCR engine to warm up under the actual operating conditions required compression ratio and target ignition advance angle, which is not specifically limited in the embodiment of the present invention.
  • the first engine temperature and engine speed of the current VCR engine are acquired, and the base value of the warm-up target compression ratio is determined according to the first engine temperature and engine speed. Then obtain the engine load of the current VCR engine, and determine the basic value of the ignition advance angle according to the engine load and engine speed. The next step is to obtain the actual warm-up compression ratio of the current VCR engine, and determine the ignition advance angle correction according to the actual warm-up compression ratio Value, add the ignition advance angle base value and the ignition advance angle correction value to obtain the target ignition advance angle, and control the VCR engine to warm up according to the warm-up target compression ratio base value and the target ignition advance angle.
  • the warm-up control device can add the basic value of the ignition advance angle and the correction value of the ignition advance angle to obtain the target ignition advance angle, that is, the ignition advance angle can be increased, and the gas expansion stroke time can be prolonged. , Increase the maximum temperature in the cylinder, thereby speeding up the warm-up speed, and at the same time improving the emissions during the warm-up process.
  • Fig. 2 is a flowchart of another warm-up control method based on a VCR engine provided by the second embodiment of the present invention, which is applied to a warm-up control device, and the warm-up control device is connected to the VCR engine.
  • the warm-up Control methods include:
  • Step 201 When it is detected that the VCR engine is energized and not started, obtain the current second engine temperature of the VCR engine, and determine the target starting compression ratio according to the second engine temperature. Among them, the target starting compression ratio is greater than the engine base compression ratio.
  • the warm-up control device when the warm-up control device detects that the VCR engine is energized and not started, it acquires the second engine temperature of the VCR engine at the current moment, and if the second engine temperature is less than the preset minimum cold start temperature , You can find the pre-stored starting target compression ratio calculation curve according to the second engine temperature to obtain the target starting compression ratio. After that, the warm-up control device can control the VCR engine to perform a cold start according to the target starting compression ratio.
  • the X axis in the starting target compression ratio calculation curve represents the temperature of the VCR motor before starting
  • the Z axis in the starting target compression ratio calculation curve represents the target starting compression ratio
  • the engine base compression ratio is the base compression ratio corresponding to the VCR engine when the VCR engine is energized and not started.
  • the target starting compression ratio may be 1 to 3 units larger than the engine base compression ratio. Assuming that the engine base compression ratio is 11, the target starting compression ratio may be any value from 12 to 14.
  • the preset minimum starting temperature can be input to the warm-up control device in advance.
  • the second engine temperature refers to the temperature corresponding to the VCR engine when the VCR engine is energized and not started.
  • the motion or operating status of each structure in the VCR engine can be detected by the sensor, and the sensor can send the corresponding status signal to the warm-up control device to monitor the motion or operating status of each structure of the VCR engine. Conduct monitoring.
  • the senor can be used to monitor whether the VCR engine is energized or not, the sensor can be used to monitor whether the VCR engine is in the starting state or not, and the second engine temperature of the VCR engine can be monitored by the sensor.
  • the corresponding status signal is sent to the warm-up control device to monitor the movement or operating status of each structure of the VCR engine.
  • the warm-up control device can search for the pre-stored start target according to the second engine temperature Compression ratio calculation curve to obtain the target starting compression ratio.
  • the minimum cold start temperature preset in the warm-up control device is represented by the signal T-EngCold.
  • Step 202 Obtain the actual starting compression ratio of the current VCR engine, and determine the target excess air coefficient according to the starting actual compression ratio; the target excess air coefficient is greater than the basic excess air coefficient.
  • the excess air ratio corresponding to the VCR engine is equal to the base excess air ratio.
  • the warm-up control device can obtain the actual starting compression ratio of the VCR engine at the current moment, and according to the current starting actual compression ratio, look up the pre-stored starting process target excess air coefficient calculation curve, so as to obtain the target excess Air coefficient. After that, the warm-up control device can control the VCR engine to perform a cold start according to the target excess air coefficient.
  • the target excess air ratio is also the excess air ratio corresponding to the VCR engine when the actual compression ratio of the VCR engine is equal to the target starting compression ratio.
  • the X-axis in the target excess air coefficient calculation curve during the starting process represents the actual starting compression ratio
  • the Z-axis in the target excess air coefficient calculation curve during the starting process represents the target excess air coefficient
  • the corresponding base excess air coefficient is 0.85. If the current starting actual compression ratio increases to the target starting compression ratio 13, the corresponding target excess air coefficient can be 0.9 Any value between to 1.0.
  • Step 203 Control the VCR engine to perform a cold start according to the target starting compression ratio and the target excess air coefficient.
  • the warm-up control device can control the VCR engine to perform a cold start under the control conditions that satisfy the target starting compression ratio and the target excess air ratio.
  • the basic engine compression ratio is the compression ratio when the VCR engine in the current technology is energized and not started.
  • the actual starting compression ratio is the currently measured compression ratio of the VCR engine when starting, and is related to the current VCR engine temperature.
  • the target starting compression ratio is the compression ratio that the VCR engine needs to reach when starting in the embodiment of the present invention.
  • the actual starting compression ratio and the basic engine compression ratio are both less than the target starting compression ratio. Therefore, the warm-up control device controls the VCR engine to perform cold start according to the target starting compression ratio, which is to improve the VCR engine cold start.
  • the compression ratio in turn, can increase the success rate of the starting process and improve the combustion process.
  • Step 204 When a successful cold start of the VCR engine is detected, obtain the first engine temperature and engine speed of the current VCR engine, and determine the warm-up target compression ratio base value according to the first engine temperature and engine speed.
  • the second engine temperature is lower than the first engine temperature.
  • the temperature of the VCR engine will increase from the starting process to the warming up process of the VCR engine. Therefore, the second engine temperature when the VCR engine starts is lower than the first engine temperature when the VCR engine is warming up.
  • the warm-up control device may search for the target compression ratio distribution map during the warm-up process according to the first engine temperature and the engine speed, and obtain the base value of the warm-up target compression ratio.
  • the X-axis in the target compression ratio distribution diagram during the warm-up process represents the engine speed
  • the Y-axis in the target compression ratio distribution diagram during the warm-up process represents the first engine temperature
  • the Z-axis in the target compression ratio distribution diagram during the warm-up process represents warming.
  • the base value of the machine target compression ratio represents the base value of the machine target compression ratio.
  • the warm-up target compression ratio base value is negatively related to the engine speed, that is, the warm-up target compression ratio base value decreases as the engine speed increases ,
  • the base value of the warm-up target compression ratio increases as the engine speed decreases.
  • the warm-up target compression ratio base value when the engine speed does not change, is positively correlated with the first engine temperature, that is, the warm-up target compression ratio base value increases as the first engine temperature increases. Increase, the warm-up target compression ratio base value decreases as the first engine temperature decreases.
  • Step 205 Obtain the current engine load of the VCR engine, and determine the basic value of the ignition advance angle according to the engine load and the engine speed.
  • the warm-up control device can obtain the engine load of the VCR engine at the current moment, and according to the engine load and engine speed, look up the ignition advance angle basic value calculation map to obtain the ignition advance angle basic value.
  • the X-axis in the ignition advance angle basic value calculation diagram represents engine speed
  • the Y-axis in the ignition advance angle basic value calculation diagram represents engine load
  • the Z-axis in the ignition advance angle basic value calculation diagram represents the ignition advance angle basic value
  • the basic value of the ignition advance angle is positively correlated with the engine speed, that is, the basic value of the ignition advance angle increases with the increase of the engine speed, and the basic value of the ignition advance angle Decrease as the engine speed decreases.
  • the basic value of the ignition advance angle when the engine speed is constant, the basic value of the ignition advance angle is negatively correlated with the engine load, that is, the basic value of the ignition advance angle decreases as the engine load increases, and the basic value of the ignition advance angle Increases as the engine load decreases.
  • Step 206 Obtain the actual warm-up compression ratio of the current VCR engine, and determine the ignition advance angle correction value according to the warm-up actual compression ratio.
  • the warm-up control device can obtain the actual warm-up compression ratio of the VCR engine at the current moment, and according to the current warm-up actual compression ratio, look up the warm-up compression ratio versus the ignition advance angle correction amount calculation curve to obtain Ignition advance angle correction value.
  • the X-axis in the warm-up compression ratio versus ignition advance angle correction calculation curve represents the actual warm-up compression ratio
  • the Z-axis in the warm-up compression ratio versus ignition advance angle correction calculation curve represents the ignition advance angle correction value
  • the ignition advance angle correction value is positively correlated with the current warm-up actual compression ratio, that is, the ignition advance angle correction value increases as the current warm-up actual compression ratio increases, and the ignition advance The angle correction value decreases as the actual compression ratio of the current warm-up engine decreases.
  • the above-mentioned starting target compression ratio calculation curve, starting process target excess air coefficient calculation curve, warm-up process target compression ratio distribution graph, target compression ratio distribution graph, ignition advance angle basic value calculation graph, and warm-up compression Comparing the calculation curve of the ignition advance angle correction amount can be pre-stored in the warm-up control device as theoretical data after passing the actual measurement in an ideal state.
  • Step 207 Add the ignition advance angle base value and the ignition advance angle correction value to obtain the target ignition advance angle.
  • the obtained target ignition advance angle is greater than the ignition advance angle base value.
  • Step 208 Control the VCR engine to warm up according to the base value of the warm-up target compression ratio and the target ignition advance angle.
  • This step can specifically include:
  • Sub-step (1) according to the engine load and engine speed, determine the actual working condition demand compression ratio
  • Sub-step (2) Determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio;
  • Sub-step (3) according to the warm-up target compression ratio and the target ignition advance angle, control the VCR engine to warm-up.
  • sub-step (1) when the working condition of the VCR engine changes drastically, such as sudden acceleration, the working condition of the VCR engine has a greater influence on the compression ratio.
  • the warm-up control device can find the target compression according to the engine load and engine speed. Ratio distribution chart to obtain the compression ratio of actual working conditions.
  • the X-axis in the target compression ratio distribution chart represents the engine speed
  • the Y-axis in the target compression ratio distribution chart represents the engine load
  • the Z-axis in the target compression ratio distribution chart represents the actual operating condition demand compression ratio
  • the actual operating condition required compression ratio is negatively correlated with the engine speed, that is, the actual operating condition required compression ratio decreases as the engine speed increases, and the actual operating condition The required compression ratio increases as the engine speed decreases.
  • the actual operating condition demand compression ratio is negatively correlated with the engine load, that is, the actual operating condition demand compression ratio decreases as the engine load increases, and the actual operating condition The required compression ratio increases as the engine load decreases.
  • the warm-up control device can also obtain the compression ratio required by the actual working condition through substep (1).
  • the warm-up control device determines the warm-up target compression ratio base value as the warm-up target compression ratio; when the actual operating conditions require When the compression ratio is less than the base value of the warm-up target compression ratio, the warm-up control device determines the actual operating condition demand compression ratio as the warm-up target compression ratio.
  • the warm-up control device can control the VCR engine to warm-up under the conditions of the actual operating conditions required compression ratio and target ignition advance angle.
  • this step may specifically include: when the working condition of the VCR engine is stable, the working condition of the VCR engine has a small influence on the compression ratio, and determining the warm-up target compression ratio base value as the warm-up target compression ratio; According to the warm-up target compression ratio and the target ignition advance angle, the VCR engine is controlled to warm up.
  • the base value of the warm-up target compression ratio is the compression ratio that the VCR engine should correspond to at the current temperature and speed when the engine is warmed up.
  • the compression ratio required by the actual operating conditions is the compression ratio that the VCR engine should correspond to under the current load (operating conditions) and speed when the engine is warmed up.
  • the actual compression ratio of the warm-up engine is the compression ratio of the VCR engine currently measured when the engine is warm-up.
  • the basic value of the warm-up target compression ratio and the actual operating condition demand compression ratio are related to the configuration and displacement of the VCR engine.
  • the warm-up target compression ratio that is, the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio, is the compression ratio that the VCR engine needs to achieve when warming up in the embodiment of the present invention.
  • the actual warm-up compression ratio is greater than the base value of the warm-up target compression ratio and the actual working condition demand compression ratio. Therefore, the warm-up control device controls the VCR engine to warm up according to the minimum compression ratio in the two cases. , That is, it can reduce the compression ratio when the VCR engine is warming up, and then can speed up the warming up speed.
  • Step 209 Acquire the current third engine temperature of the VCR engine, and when the third engine temperature reaches the preset normal operating temperature of the engine, the warm-up is completed.
  • the warm-up control device may obtain the third engine of the VCR engine at the current moment during the warm-up process. temperature.
  • the warm-up control device can control the VCR engine to perform a cold start according to a target starting compression ratio greater than the engine base compression ratio and a target excess air coefficient greater than the base excess air ratio, that is, Increasing the engine compression ratio and excess air coefficient during the starting process can increase the success rate of the starting process, improve the combustion process, reduce the mixture concentration, and reduce the fuel consumption and emissions during the starting process.
  • the warm-up control device can determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio, that is, reduce the engine compression ratio during the warm-up process , And can increase the ignition advance angle during the warm-up process, and then speed up the warm-up speed.
  • Fig. 3 is a structural block diagram of a warm-up control device based on a variable compression ratio engine provided by the third embodiment of the present invention.
  • the warm-up control device is connected to the variable compression ratio engine.
  • the warm-up control device 300 includes:
  • the first determining module 301 is used to obtain the first engine temperature and engine speed of the current variable compression ratio engine when it is detected that the cold start of the variable compression ratio engine is successful, and determine the warm-up according to the first engine temperature and engine speed Basic value of target compression ratio;
  • the first acquisition module 302 is configured to acquire the current engine load of the variable compression ratio engine, and determine the basic value of the ignition advance angle according to the engine load and the engine speed;
  • the second acquisition module 303 is configured to acquire the actual warm-up compression ratio of the current variable compression ratio engine, and determine the ignition advance angle correction value according to the warm-up actual compression ratio;
  • the obtaining module 304 is used to add the basic value of the ignition advance angle and the correction value of the ignition advance angle to obtain the target ignition advance angle;
  • the first control module 305 is configured to control the variable compression ratio engine to warm up according to the base value of the warm-up target compression ratio and the target ignition advance angle.
  • the first determination module is first used to obtain the first engine temperature and the engine speed of the current variable compression ratio engine when the cold start of the variable compression ratio engine is detected successfully, and according to the first engine temperature and Engine speed, determine the basic value of warm-up target compression ratio, and then obtain the current engine load of the variable compression ratio engine through the first acquisition module, and determine the basic value of the ignition advance angle according to the engine load and engine speed, through the second acquisition module , Obtain the actual warm-up compression ratio of the current variable compression ratio engine, and determine the ignition advance angle correction value according to the actual warm-up compression ratio.
  • the next step is to add the basic value of the ignition advance angle and the ignition advance angle correction value through the acquisition module , Obtain the target ignition advance angle, and then through the first control module, according to the warm-up target compression ratio base value and the target ignition advance angle, control the variable compression ratio engine to warm up.
  • the warm-up control device can add the ignition advance angle base value and the ignition advance angle correction value to obtain the target ignition advance angle, that is, the ignition advance angle can be increased, This can extend the gas expansion stroke time and increase the maximum temperature in the cylinder, thereby speeding up the warm-up speed and at the same time improving the emissions during the warm-up process.
  • Fig. 4 is a structural block diagram of a warm-up control device based on a variable compression ratio engine provided by the fourth embodiment of the present invention.
  • the warm-up control device is used to control the variable compression ratio engine.
  • the warm-up control The device 400 includes:
  • the first determining module 401 is used to obtain the first engine temperature and engine speed of the current variable compression ratio engine when it is detected that the variable compression ratio engine cold start is successful, and determine the warm-up according to the first engine temperature and engine speed Basic value of target compression ratio;
  • the first obtaining module 402 is configured to obtain the current engine load of the variable compression ratio engine, and determine the basic value of the ignition advance angle according to the engine load and the engine speed;
  • the second acquisition module 403 is configured to acquire the actual warm-up compression ratio of the current variable compression ratio engine, and determine the ignition advance angle correction value according to the warm-up actual compression ratio;
  • the obtaining module 404 is configured to add the basic value of the ignition advance angle and the correction value of the ignition advance angle to obtain the target ignition advance angle;
  • the first control module 405 is configured to control the variable compression ratio engine to warm up according to the warm-up target compression ratio base value and the target ignition advance angle.
  • the first control module 405 includes:
  • the first determining sub-module 4051 is used to determine the compression ratio required by the actual working condition according to the engine load and the engine speed;
  • the second determining sub-module 4052 is configured to determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio;
  • the control sub-module 4053 is used to control the variable compression ratio engine to warm up according to the warm-up target compression ratio and the target ignition advance angle.
  • the warm-up control device 400 further includes:
  • the second determination module 406 is used to obtain the second engine temperature of the current variable compression ratio engine when it is detected that the variable compression ratio engine is energized and not started, and determine the target starting compression ratio according to the second engine temperature ;
  • the target starting compression ratio is greater than the engine base compression ratio; the second engine temperature is less than the first engine temperature;
  • the second control module 407 is used to control the variable compression ratio engine to perform a cold start according to the target starting compression ratio.
  • the warm-up control device 400 further includes:
  • the third determining module 408 is configured to obtain the actual starting compression ratio of the current variable compression ratio engine, and determine the target excess air coefficient according to the starting actual compression ratio; the target excess air coefficient is greater than the basic excess air coefficient;
  • the third control module 409 is used to control the variable compression ratio engine to perform a cold start according to the target excess air ratio.
  • the warm-up control device 400 further includes:
  • the third acquisition module 410 is configured to acquire the current third engine temperature of the variable compression ratio engine, and when the third engine temperature reaches a preset normal operating temperature of the engine, the warm-up is completed.
  • the warm-up control device can control the VCR engine to perform a cold start according to a target starting compression ratio greater than the engine base compression ratio and a target excess air coefficient greater than the base excess air ratio, that is, Increasing the engine compression ratio and excess air coefficient during the starting process can increase the success rate of the starting process, improve the combustion process, reduce the mixture concentration, and reduce the fuel consumption and emissions during the starting process.
  • the warm-up control device can determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio, that is, reduce the engine compression ratio during the warm-up process , And can increase the ignition advance angle during the warm-up process, and then speed up the warm-up speed.
  • the device embodiments described above are merely illustrative.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without creative work.
  • the embodiment of the present invention also provides an engine assembly.
  • the engine assembly may include a variable compression ratio engine 500, and a warm-up control device 400 connected to the variable compression ratio engine 500, wherein
  • the warm-up control device is the warm-up control device described in any one of the third or fourth embodiment.
  • the warm-up control device in the engine assembly can control the VCR engine to perform a cold start according to a target starting compression ratio greater than the engine base compression ratio and a target excess air ratio greater than the base excess air ratio, That is to say, the engine compression ratio and excess air coefficient during the starting process can be increased, thereby increasing the success rate of the starting process, improving the combustion process, reducing the mixed gas concentration, and reducing the fuel consumption and emissions during the starting process.
  • the warm-up control device in the engine assembly can determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio, which means that it reduces the warm-up process.
  • the engine compression ratio can be increased, and the ignition advance angle during the warm-up process can be increased, which can speed up the warm-up speed.
  • An embodiment of the present invention also provides a vehicle, which includes an engine component, and the vehicle can execute the warm-up control method based on a variable compression ratio engine described in any one of the first embodiment or the second embodiment.
  • the warm-up control device in the vehicle can control the VCR engine to perform a cold start according to a target starting compression ratio greater than the engine base compression ratio and a target excess air coefficient greater than the base excess air coefficient. That is, it can increase the engine compression ratio and excess air coefficient during the starting process, thereby increasing the success rate of the starting process, improving the combustion process, reducing the mixture concentration, and reducing the fuel consumption and emissions during the starting process.
  • the warm-up control device in the vehicle can determine the minimum value of the warm-up target compression ratio base value and the actual operating condition demand compression ratio as the warm-up target compression ratio, that is, reduce the temperature during the warm-up process. Engine compression ratio, and can increase the ignition advance angle during the warm-up process, thereby speeding up the warm-up speed.
  • the various component embodiments of the present invention may be implemented by hardware, or by software modules running on one or more processors, or by a combination of them.
  • a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the computing processing device according to the embodiments of the present invention.
  • DSP digital signal processor
  • the present invention can also be implemented as a device or device program (for example, a computer program and a computer program product) for executing part or all of the methods described herein.
  • Such a program for realizing the present invention may be stored on a computer-readable medium, or may have the form of one or more signals.
  • Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.
  • FIG. 6 shows a computing processing device that can implement the method according to the present invention.
  • the computing processing device traditionally includes a processor 1010 and a computer program product in the form of a memory 1020 or a computer readable medium.
  • the memory 1020 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM.
  • the memory 1020 has a storage space 1030 for executing the program code 1031 of any method step in the above method.
  • the storage space 1030 for program codes may include various program codes 1031 respectively used to implement various steps in the above method. These program codes can be read from or written into one or more computer program products.
  • Such computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards, or floppy disks.
  • Such a computer program product is usually a portable or fixed storage unit as described with reference to FIG. 7.
  • the storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 1020 in the computing processing device of FIG. 6.
  • the program code can be compressed in an appropriate form, for example.
  • the storage unit includes computer-readable code 1031', that is, code that can be read by a processor such as 1010, which, when run by a computing processing device, causes the computing processing device to execute the method described above. The various steps.
  • any reference signs placed between parentheses should not be constructed as a limitation to the claims.
  • the word “comprising” does not exclude the presence of elements or steps not listed in the claims.
  • the word “a” or “an” before an element does not exclude the presence of multiple such elements.
  • the invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims that list several devices, several of these devices may be embodied in the same hardware item.
  • the use of the words first, second, and third, etc. do not indicate any order. These words can be interpreted as names.

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Abstract

一种可变压缩比发动机的控制方法，包括：当检测到可变压缩比发动机冷起动成功时，获取当前可变压缩比发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值；获取当前可变压缩比发动机的发动机负荷，并根据发动机负荷和发动机转速确定点火提前角基础值；获取当前可变压缩比发动机的暖机实际压缩比，并根据暖机实际压缩比确定点火提前角修正值；获得目标点火提前角；根据暖机目标压缩比基础值和目标点火提前角控制可变压缩比发动机进行暖机。该方法增大了暖机过程中的点火提前角，从而能够加快暖机速度，缩短暖机时间。一种可变压缩比发动机的控制装置、一种发动机组件、一种车辆以及一种计算机可读介质也被公开。

Description

可变压缩比发动机的控制方法及装置
本申请要求在2019年9月27日提交中国专利局、申请号为201910926844.1、发明名称为“可变压缩比发动机的控制方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及发动机技术领域，特别涉及一种可变压缩比发动机的控制方法及装置。
背景技术
随着用户对汽车的动力性和经济性要求的逐渐提高，对汽车重要部件之一的发动机的性能要求也逐渐提高。发动机包括传统发动机和可变压缩比(Varriable Compress Ratio，VCR)发动机，VCR发动机可以通过控制实际压缩比，达到降低油耗，改善排放的目的，从而可以提高VCR发动机的动力性和经济性。
在VCR发动机的所有运行工况下，VCR发动机的暖机过程对VCR发动机的油耗和排放均会产生重要影响，故暖机过程的完成时间越短越好。而目前，对于传统发动机，大多可以采用电子节温器或优化冷却循环管路的方式缩短暖机时间。但二者主要是对传统发动机管路或结构的优化，因此对暖机过程的影响十分有限，尤其对于VCR发动机，应用于传统发动机的相关技术更是无法有效地缩短暖机时间。
发明内容
有鉴于此，本发明旨在提出一种可变压缩比发动机的控制方法及装置，以有效地缩短VCR发动机的暖机时间。
为达到上述目的，本发明的技术方案是这样实现的：
第一方面提供了一种基于可变压缩比发动机的暖机控制方法，应用于暖机控制装置，所述暖机控制装置与可变压缩比发动机连接，所述方法包括：
当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值；
获取当前所述可变压缩比发动机的发动机负荷，并根据所述发动机负荷和所述发动机转速，确定点火提前角基础值；
获取当前所述可变压缩比发动机的暖机实际压缩比，并根据所述暖机实际压缩比，确定点火提前角修正值；
将所述点火提前角基础值与所述点火提前角修正值相加，获得目标点火提前角；
根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
本发明所述的一种可变压缩比发动机的控制方法，首先当检测到可变压缩比发动机冷起动成功时，获取当前可变压缩比发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值，接着获取当前可变压缩比发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值，下一步获取当前可变压缩比发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值，将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角，并且根据暖机目标压缩比基础值和目标点火提前角，控制可变压缩比发动机进行暖机。在本发明实施例中，暖机控制装置可以将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角，也即是可以增大点火提前角，从而可以延长气体膨胀行程时间，提高缸内最高温度，进而加快了暖机速度，同时还可改善暖机过程中的排放。
本发明的另一目的在于提出一种可变压缩比发动机的控制装置，以有效地缩短VCR发动机的暖机时间。
为达到上述目的，本发明的技术方案是这样实现的：
第二方面提供了一种基于可变压缩比发动机的暖机控制装置，所述暖机控制装置用于控制可变压缩比发动机，所述暖机控制装置包括：
存储器，其中存储有计算机可读代码；
一个或多个处理器，当所述计算机可读代码被所述一个或多个处理器执行时，所述暖机控制装置执行如下操作，包括：当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值；
获取当前所述可变压缩比发动机的发动机负荷，并根据所述发动机负荷和所述发动机转速，确定点火提前角基础值；
获取当前所述可变压缩比发动机的暖机实际压缩比，并根据所述暖机实际压缩比，确定点火提前角修正值；
将所述点火提前角基础值与所述点火提前角修正值相加，获得目标点火提前角；
根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
可选地，所述根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机的操作包括：
根据所述发动机负荷和所述发动机转速，确定实际工况需求压缩比；
将所述暖机目标压缩比基础值和所述实际工况需求压缩比中的最小值确定为暖机目标压缩比；
根据所述暖机目标压缩比和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
可选地，所述操作还包括：
当检测到所述可变压缩比发动机处于通电且未起动的状态时，获取当前所述可变压缩比发动机的第二发动机温度，并根据所述第二发动机温度，确定目标起动压缩比；所述目标起动压缩比大于发动机基础压缩比；所述第二发动机温度小于所述第一发动机温度；
根据所述目标起动压缩比，控制所述可变压缩比发动机进行冷起动。
可选地，所述操作还包括：
获取当前所述可变压缩比发动机的起动实际压缩比，并根据所述起动实际压缩比，确定目标过量空气系数；所述目标过量空气系数大于基础过量空气系数；
根据所述目标过量空气系数，控制所述可变压缩比发动机进行冷起动。
可选地，所述操作还包括：
获取当前所述可变压缩比发动机的第三发动机温度，当所述第三发动机温度达到预设的发动机正常工作温度时，暖机完成。
第三方面提供了一种发动机组件，包括：
可变压缩比发动机，以及和所述可变压缩比发动机连接的暖机控制装置，所述暖机控制装置执行第二方面任一项所述的基于可变压缩比发动机的暖机控制装置。
第四方面提供了一种车辆，所述车辆包括所述发动机组件，所述车辆可以执行第三方面任一项所述的发动机组件。
第五方面提供了一种计算机可读介质，其中存储了计算机可读代码，当所述计算机可读代码被计算处理设备执行时，所述计算处理设备执行第一方面任一项所述的基于可变压缩比发动机的暖机控制方法。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示意性地示出了本发明实施例一提供的一种基于可变压缩比发动机的暖机控制方法的流程图；
图2示意性地示出了本发明实施例二提供的另一种基于可变压缩比发动机的暖机控制方法的流程图；
图3示意性地示出了本发明实施例三提供的一种基于可变压缩比发动机的暖机控制装置的结构框图；
图4示意性地示出了本发明实施例四提供的一种基于可变压缩比发动 机的暖机控制装置的结构框图；
图5示意性地示出了本发明实施例提供的一种发动机组件的结构框图；
图6示意性地示出了用于执行根据本发明的方法的计算处理设备的框图；以及
图7示意性地示出了用于保持或者携带实现根据本发明的方法的程序代码的存储单元。
具体实施例
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
图1是本发明实施例一提供的一种基于可变压缩比发动机的暖机控制方法的流程图，应用于暖机控制装置，暖机控制装置与可变压缩比发动机(以下简称VCR发动机)连接，如图1所示，该方法包括：
步骤101、当检测到VCR发动机冷起动成功时，获取当前VCR发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值。
其中，第一发动机温度指的是VCR发动机冷起动成功时，VCR发动机所对应的温度。
在本发明实施例中，暖机控制装置输出信号ColdStrt＝1，ColdStrt＝1表示发动机处于冷起动状态，并且暖机控制装置输出信号T50＝1，T50＝1表示发动机处于起动状态，当VCR发动机转速大于预设起动最小转速，且该状态持续时间超过预设指定时间，则暖机控制装置输出信号StrtEnd＝1，StrtEnd＝1表示VCR发动机冷起动成功。当VCR发动机冷起动成功时，暖机控制装置可以获取当前时刻下VCR发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值。
步骤102、获取当前VCR发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值。
在本发明实施例中，暖机控制装置可以获取当前VCR发动机的发动机负荷，当发动机负荷不变时，点火提前角基础值与发动机转速正相关，也即是，点火提前角基础值随着发动机转速的增大而增大，点火提前角基础值随着发动机转速的减小而减小。
在本发明实施例中，当发动机转速不变时，点火提前角基础值与发动机负荷负相关，也即是，点火提前角基础值随着发动机负荷的增大而减小，点火提前角基础值随着发动机负荷的减小而增大。
步骤103、获取当前VCR发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值。
在实际应用中，可以通过电机控制器(Motor Control Unit，MCU)采集得到当前的暖机实际压缩比，进而MCU可以采集到的暖机实际压缩比发送至暖机控制装置，在本发明实施例中，暖机控制装置可以是发动机控制器(Electronic Control Unit，ECU)，则当ECU接收到MCU发送的暖机实际压缩比时，可以根据当前的暖机实际压缩比，确定点火提前角修正值。
在本发明实施例中，点火提前角修正值与当前的暖机实际压缩比正相关，也即是，点火提前角修正值随着当前的暖机实际压缩比的增大而增大，点火提前角修正值随着当前的暖机实际压缩比减小而减小。
步骤104、将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角。
在本发明实施例中，由于目标点火提前角是由点火提前角基础值与点火提前角修正值相加而得到的，所以得到的目标点火提前角大于点火提前角基础值。
步骤105、根据暖机目标压缩比基础值和目标点火提前角，控制VCR发动机进行暖机。
在本发明实施例中，在工况稳定的情况下，可以将暖机目标压缩比基础值作为实际工况需求压缩比，暖机控制装置可以控制VCR发动机在暖机目标压缩比基础值和目标点火提前角的情况下进行暖机，直至VCR发动机温度 大于或者等于预设的发动机正常工作温度，则暖机控制装置可以输出信号WarmMode＝0，WarmMode＝0表示暖机完成。
另外，在工况急剧变化的情况下，例如急加速等情况下，可以根据暖机目标压缩比基础值确定出实际工况需求压缩比，暖机控制装置可以控制VCR发动机在实际工况需求压缩比和目标点火提前角的情况下进行暖机，直至VCR发动机温度大于或者等于预设的发动机正常工作温度，则暖机控制装置可以输出信号WarmMode＝0，WarmMode＝0表示暖机完成。当然，在工况稳定的情况下，也可以采用上述方式，控制VCR发动机在实际工况需求压缩比和目标点火提前角的情况下进行暖机，本发明实施例对此不作具体限定。
在本发明实施例中，首先当检测到VCR发动机冷起动成功时，获取当前VCR发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值，接着获取当前VCR发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值，下一步获取当前VCR发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值，将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角，并且根据暖机目标压缩比基础值和目标点火提前角，控制VCR发动机进行暖机。在本发明实施例中，暖机控制装置可以将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角，也即是可以增大点火提前角，从而可以延长气体膨胀行程时间，提高缸内最高温度，进而加快了暖机速度，同时还可改善暖机过程中的排放。
实施例二
图2是本发明实施例二提供的另一种基于VCR发动机的暖机控制方法的流程图，应用于暖机控制装置，暖机控制装置与VCR发动机连接，如图2所示，该暖机控制方法包括：
步骤201、当检测到VCR发动机处于通电且未起动的状态时，获取当前VCR发动机的第二发动机温度，并根据第二发动机温度，确定目标起动压缩比。其中，目标起动压缩比大于发动机基础压缩比。
在本发明实施例中，当暖机控制装置检测到VCR发动机处于通电且未起动的状态时，获取当前时刻下VCR发动机的第二发动机温度，若第二发动 机温度小于预设的最小冷起动温度，则可以根据第二发动机温度，查找预存的起动目标压缩比计算曲线，获得目标起动压缩比。之后，暖机控制装置可以根据目标起动压缩比，控制VCR发动机进行冷起动。
其中，起动目标压缩比计算曲线中的X轴表示VCR电机起动前的温度，起动目标压缩比计算曲线中的Z轴表示目标起动压缩比。
另外，发动机基础压缩比是VCR发动机处于通电且未起动的状态时，VCR发动机对应的基础压缩比。其中，目标起动压缩比可以比发动机基础压缩比大1至3个单位，假设发动机基础压缩比为11，那么目标起动压缩比可以为12至14中的任意一值。
在实际应用中，预设的最小起动温度可以提前输入至暖机控制装置中，第二发动机温度指的是VCR发动机处于通电且未起动的状态时，VCR发动机对应的温度。
在本发明实施例中，可以通过传感器检测VCR发动机中各个结构的运动或运行状态，进而传感器可以将相对应的状态信号发送至暖机控制装置中，以对VCR发动机各个结构的运动或运行状态进行监测。
在具体应用时，可以通过传感器监测VCR发动机处于通电状态还是未通电状态，可以通过传感器监测VCR发动机处于起动状态还是未起动状态，可以通过传感器监测VCR发动机的第二发动机温度，进而各传感器可以将相对应的状态信号发送至暖机控制装置中，以对VCR发动机各个结构的运动或运行状态进行监测。
当通过传感器监测到VCR发动机处于通电且未起动的状态，且传感器监测到的第二发动机温度小于预设的最小冷起动温度，则暖机控制装置可以根据第二发动机温度，查找预存的起动目标压缩比计算曲线，获得目标起动压缩比。
具体的，VCR发动机处于通电状态时，传感器中会产生信号：T15＝1，并将该信号发送至暖机控制装置中；VCR发动机处于未通电状态时，传感器中会产生信号：T15＝0，并将该信号发送至暖机控制装置中；VCR发动机处于未起动状态时，传感器中会产生信号：T50＝0，并将该信号发送至暖机控制装置中；VCR发动机处于起动状态时，传感器中会产生信号：T50＝1，并 将该信号发送至暖机控制装置中；传感器监测VCR发动机的第二发动机温度，并产生信号：T-Eng，并将该信号发送至暖机控制装置中；暖机控制装置中预设的最小冷起动温度用T-EngCold这一信号来表示，若T-Eng小于T-EngCold，则暖机控制装置输出ColdStrt＝1，ColdStrt＝1表示发动机处于冷起动状态，则暖机控制装置可以根据第二发动机温度，查找预存的起动目标压缩比计算曲线，获得目标起动压缩比。若T-Eng大于或者等于T-EngCold，则暖机控制装置输出ColdStrt＝0，ColdStrt＝0表示发动机处于热起动状态。
步骤202、获取当前VCR发动机的起动实际压缩比，并根据起动实际压缩比，确定目标过量空气系数；目标过量空气系数大于基础过量空气系数。
在本发明实施例中，在VCR发动机的实际压缩比等于发动机基础压缩比的情况下，VCR发动机对应的过量空气系数即等于基础过量空气系数。
在本发明实施例中，暖机控制装置可以获取当前时刻下VCR发动机的起动实际压缩比，并根据当前的起动实际压缩比，查找预存的起动过程目标过量空气系数计算曲线，从而可以获得目标过量空气系数。之后，暖机控制装置可以根据目标过量空气系数，控制VCR发动机进行冷起动。目标过量空气系数也即是在VCR发动机的实际压缩比等于目标起动压缩比的情况下，VCR发动机对应的过量空气系数。
其中，起动过程目标过量空气系数计算曲线中的X轴表示起动实际压缩比，起动过程目标过量空气系数计算曲线中的Z轴表示目标过量空气系数。
示例的，当发动机基础压缩比为11时，相对应的基础过量空气系数为0.85，则若当前的起动实际压缩比增大为目标起动压缩比13后，相对应的目标过量空气系数可以为0.9至1.0之间的任意一值。
步骤203、根据目标起动压缩比和目标过量空气系数，控制VCR发动机进行冷起动。
在本发明实施例中，暖机控制装置可以控制VCR发动机在满足目标起动压缩比和目标过量空气系数的控制条件下进行冷起动。暖机控制装置输出信号ColdStrt＝1，ColdStrt＝1表示发动机处于冷起动状态，并且暖机控制装置输出信号T50＝1，T50＝1表示发动机处于起动状态，当VCR发动机转速大于预设起动最小转速，且该状态持续时间超过预设指定时间，则暖机控制装置 输出信号StrtEnd＝1，StrtEnd＝1表示VCR发动机冷起动成功。
本发明实施例中，发动机基础压缩比，是目前技术中VCR发动机处于通电且未起动的状态时的压缩比。起动实际压缩比，是当前实测的起动时VCR发动机的压缩比，与当前VCR发动机的温度有关。目标起动压缩比是本发明实施例中需要VCR发动机在起动时达到的压缩比。在具体应用时，起动实际压缩比和发动机基础压缩比均小于目标起动压缩比，因此，暖机控制装置根据目标起动压缩比，控制VCR发动机进行冷起动，也就是能够提高VCR发动机冷启动时的压缩比，进而可以提高起动过程的成功率，改善燃烧过程。
步骤204、当检测到VCR发动机冷起动成功时，获取当前VCR发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值。
其中，第二发动机温度小于第一发动机温度。VCR发动机从起动过程到暖机过程，VCR发动机的温度会升高，因此，VCR发动机起动时的第二发动机温度小于VCR发动机暖机时的第一发动机温度。
可选地，暖机控制装置可以根据第一发动机温度和发动机转速，查找暖机过程目标压缩比分布图，获得暖机目标压缩比基础值。
其中，暖机过程目标压缩比分布图中的X轴表示发动机转速，暖机过程目标压缩比分布图中的Y轴表示第一发动机温度，暖机过程目标压缩比分布图中的Z轴表示暖机目标压缩比基础值。
在本发明实施例中，当第一发动机温度不变时，暖机目标压缩比基础值与发动机转速负相关，也即是，暖机目标压缩比基础值随着发动机转速的增大而减小，暖机目标压缩比基础值随着发动机转速的减小而增大。
在本发明实施例中，当发动机转速不变时，暖机目标压缩比基础值与第一发动机温度正相关，也即是，暖机目标压缩比基础值随着第一发动机温度的增大而增大，暖机目标压缩比基础值随着第一发动机温度的减小而减小。
步骤205、获取当前VCR发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值。
在本发明实施例中，暖机控制装置可以获取当前时刻下VCR发动机的 发动机负荷，并根据发动机负荷和发动机转速，查找点火提前角基础值计算图，获得点火提前角基础值。
其中，点火提前角基础值计算图中的X轴表示发动机转速，点火提前角基础值计算图中的Y轴表示发动机负荷，点火提前角基础值计算图中的Z轴表示点火提前角基础值。
在本发明实施例中，当发动机负荷不变时，点火提前角基础值与发动机转速正相关，也即是，点火提前角基础值随着发动机转速的增大而增大，点火提前角基础值随着发动机转速的减小而减小。
在本发明实施例中，当发动机转速不变时，点火提前角基础值与发动机负荷负相关，也即是，点火提前角基础值随着发动机负荷的增大而减小，点火提前角基础值随着发动机负荷的减小而增大。
步骤206、获取当前VCR发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值。
在本发明实施例中，暖机控制装置可以获取当前时刻下VCR发动机的暖机实际压缩比，并根据当前的暖机实际压缩比，查找暖机压缩比对点火提前角修正量计算曲线，获得点火提前角修正值。
其中，暖机压缩比对点火提前角修正量计算曲线中的X轴表示暖机实际压缩比，暖机压缩比对点火提前角修正量计算曲线中的Z轴表示点火提前角修正值。
在本发明实施例中，点火提前角修正值与当前的暖机实际压缩比正相关，也即是，点火提前角修正值随着当前的暖机实际压缩比的增大而增大，点火提前角修正值随着当前的暖机实际压缩比减小而减小。
在本发明实施例中，上述起动目标压缩比计算曲线、起动过程目标过量空气系数计算曲线、暖机过程目标压缩比分布图、目标压缩比分布图、点火提前角基础值计算图和暖机压缩比对点火提前角修正量计算曲线，均可以是在理想状态下通过实测之后，作为理论数据预存在暖机控制装置中的。
步骤207、将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角。
在本发明实施例中，由于目标点火提前角是由点火提前角基础值与点 火提前角修正值相加而得到的，所以得到的目标点火提前角大于点火提前角基础值。
步骤208、根据暖机目标压缩比基础值和目标点火提前角，控制VCR发动机进行暖机。
本步骤具体可以包括：
子步骤(1)、根据发动机负荷和发动机转速，确定实际工况需求压缩比；
子步骤(2)、将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标压缩比；
子步骤(3)、根据暖机目标压缩比和目标点火提前角，控制VCR发动机进行暖机。
在子步骤(1)中，当VCR发动机的工况急剧变化，例如急加速时，VCR发动机的工况对于压缩比的影响较大，暖机控制装置可以根据发动机负荷和发动机转速，查找目标压缩比分布图，获得实际工况需求压缩比。
其中，目标压缩比分布图中的X轴表示发动机转速，目标压缩比分布图中的Y轴表示发动机负荷，目标压缩比分布图中的Z轴表示实际工况需求压缩比。
在本发明实施例中，当发动机负荷不变时，实际工况需求压缩比与发动机转速负相关，也即是，实际工况需求压缩比随着发动机转速的增大而减小，实际工况需求压缩比随着发动机转速的减小而增大。
在本发明实施例中，当发动机转速不变时，实际工况需求压缩比与发动机负荷负相关，也即是，实际工况需求压缩比随着发动机负荷的增大而减小，实际工况需求压缩比随着发动机负荷的减小而增大。
当然，在VCR发动机的工况稳定时，暖机控制装置也可以通过子步骤(1)获得实际工况需求压缩比。
在子步骤(2)中，当暖机目标压缩比基础值小于实际工况需求压缩比时，暖机控制装置将暖机目标压缩比基础值确定为暖机目标压缩比；当实际工况需求压缩比小于暖机目标压缩比基础值时，暖机控制装置将实际工况需求压缩比确定为暖机目标压缩比。
在子步骤(3)中，暖机控制装置可以控制VCR发动机在实际工况需求压缩比和目标点火提前角的情况下进行暖机。
进一步可选地，本步骤具体还可以包括：当VCR发动机的工况稳定时，VCR发动机的工况对于压缩比的影响较小，将暖机目标压缩比基础值确定为暖机目标压缩比；根据暖机目标压缩比和目标点火提前角，控制VCR发动机进行暖机。
本发明实施例中，暖机目标压缩比基础值，是暖机时VCR发动机工作在当前温度和转速下应该对应的压缩比。实际工况需求压缩比，是暖机时VCR发动机在当前负荷(工况)和转速下应该对应的压缩比。暖机实际压缩比，是当前实测的暖机时VCR发动机的压缩比。其中，暖机目标压缩比基础值和实际工况需求压缩比与VCR发动机的配置、排量等因素有关。暖机目标压缩比，也即暖机目标压缩比基础值和实际工况需求压缩比中的最小值，是本发明实施例中需要VCR发动机在暖机时达到的压缩比。在具体应用时，暖机实际压缩比大于暖机目标压缩比基础值及实际工况需求压缩比，因此，暖机控制装置根据两种情况下的压缩比的最小值，控制VCR发动机进行暖机，也就是能够减小VCR发动机暖机时的压缩比，进而可以加快暖机速度。
步骤209、获取当前VCR发动机的第三发动机温度，当第三发动机温度达到预设的发动机正常工作温度时，暖机完成。
在本发明实施例中，在VCR发动机按照暖机目标压缩比基础值和目标点火提前角开始进行暖机之后，暖机控制装置可以在暖机过程中，获取当前时刻下VCR发动机的第三发动机温度。当第三发动机温度达到预设的发动机正常工作温度时，暖机控制装置可以输出信号WarmMode＝0，WarmMode＝0表示暖机完成。
在本发明实施例中，一方面，暖机控制装置可以按照大于发动机基础压缩比的目标起动压缩比，和大于基础过量空气系数的目标过量空气系数，控制VCR发动机进行冷起动，也即是可以增大起动过程中的发动机压缩比和过量空气系数，从而可以提高起动过程的成功率，改善燃烧过程，降低混合气浓度，并且降低起动过程的油耗和排放。另一方面，暖机控制装置可以将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标 压缩比，也即是减小了暖机过程中的发动机压缩比，并且可以增大暖机过程中的点火提前角，进而可以加快暖机速度。
实施例三
图3是本发明实施例三提供的一种基于可变压缩比发动机的暖机控制装置的结构框图，暖机控制装置与可变压缩比发动机连接，如图3所示，该暖机控制装置300包括：
第一确定模块301，用于当检测到可变压缩比发动机冷起动成功时，获取当前可变压缩比发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值；
第一获取模块302，用于获取当前可变压缩比发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值；
第二获取模块303，用于获取当前可变压缩比发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值；
获得模块304，用于将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角；
第一控制模块305，用于根据暖机目标压缩比基础值和目标点火提前角，控制可变压缩比发动机进行暖机。
本发明实施例中的各个模块的具体实现方式在方法侧已经详细介绍，故在此不做赘述。
在本发明实施例中，首先通过第一确定模块，当检测到可变压缩比发动机冷起动成功时，获取当前可变压缩比发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值，接着通过第一获取模块，获取当前可变压缩比发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值，通过第二获取模块，获取当前可变压缩比发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值，下一步通过获得模块，将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角，接着通过第一控制模块，根据暖机目标压缩比基础值和目标点火提前角，控制可变压缩比发动机进行暖机。在本发明实施例中，在本发明实施例中，暖机控制装置可以将点火提前角基础值 与点火提前角修正值相加，获得目标点火提前角，也即是可以增大点火提前角，从而可以延长气体膨胀行程时间，提高缸内最高温度，进而加快了暖机速度，同时还可改善暖机过程中的排放。
实施例四
图4是本发明实施例四提供的一种基于可变压缩比发动机的暖机控制装置的结构框图，暖机控制装置用于控制可变压缩比发动机，如图4所示，该暖机控制装置400包括：
第一确定模块401，用于当检测到可变压缩比发动机冷起动成功时，获取当前可变压缩比发动机的第一发动机温度和发动机转速，并根据第一发动机温度和发动机转速，确定暖机目标压缩比基础值；
第一获取模块402，用于获取当前可变压缩比发动机的发动机负荷，并根据发动机负荷和发动机转速，确定点火提前角基础值；
第二获取模块403，用于获取当前可变压缩比发动机的暖机实际压缩比，并根据暖机实际压缩比，确定点火提前角修正值；
获得模块404，用于将点火提前角基础值与点火提前角修正值相加，获得目标点火提前角；
第一控制模块405，用于根据暖机目标压缩比基础值和目标点火提前角，控制可变压缩比发动机进行暖机。
可选地，参见图4，第一控制模块405包括：
第一确定子模块4051，用于根据发动机负荷和发动机转速，确定实际工况需求压缩比；
第二确定子模块4052，用于将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标压缩比；
控制子模块4053，用于根据暖机目标压缩比和目标点火提前角，控制可变压缩比发动机进行暖机。
可选地，参见图4，暖机控制装置400还包括：
第二确定模块406，用于当检测到可变压缩比发动机处于通电且未起动的状态时，获取当前可变压缩比发动机的第二发动机温度，并根据第二发动机温度，确定目标起动压缩比；目标起动压缩比大于发动机基础压缩比；第 二发动机温度小于第一发动机温度；
第二控制模块407，用于根据目标起动压缩比，控制可变压缩比发动机进行冷起动。
可选地，参见图4，暖机控制装置400还包括：
第三确定模块408，用于获取当前可变压缩比发动机的起动实际压缩比，并根据起动实际压缩比，确定目标过量空气系数；目标过量空气系数大于基础过量空气系数；
第三控制模块409，用于根据目标过量空气系数，控制可变压缩比发动机进行冷起动。
可选地，参见图4，暖机控制装置400还包括：
第三获取模块410，用于获取当前所述可变压缩比发动机的第三发动机温度，当所述第三发动机温度达到预设的发动机正常工作温度时，暖机完成。
本发明实施例中的各个模块的具体实现方式在方法侧已经详细介绍，故在此不再做赘述。
在本发明实施例中，一方面，暖机控制装置可以按照大于发动机基础压缩比的目标起动压缩比，和大于基础过量空气系数的目标过量空气系数，控制VCR发动机进行冷起动，也即是可以增大起动过程中的发动机压缩比和过量空气系数，从而可以提高起动过程的成功率，改善燃烧过程，降低混合气浓度，并且降低起动过程的油耗和排放。另一方面，暖机控制装置可以将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标压缩比，也即是减小了暖机过程中的发动机压缩比，并且可以增大暖机过程中的点火提前角，进而可以加快暖机速度。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例 方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
本发明实施例还提供了一种发动机组件，如图5所示，发动机组件可以包括可变压缩比发动机500，以及和所述可变压缩比发动机500连接的暖机控制装置400，其中，所述暖机控制装置为实施例三或实施例四任一所述的暖机控制装置。
在本发明实施例中，一方面，发动机组件中的暖机控制装置可以按照大于发动机基础压缩比的目标起动压缩比，和大于基础过量空气系数的目标过量空气系数，控制VCR发动机进行冷起动，也即是可以增大起动过程中的发动机压缩比和过量空气系数，从而可以提高起动过程的成功率，改善燃烧过程，降低混合气浓度，并且降低起动过程的油耗和排放。另一方面，发动机组件中的暖机控制装置可以将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标压缩比，也即是减小了暖机过程中的发动机压缩比，并且可以增大暖机过程中的点火提前角，进而可以加快暖机速度。
本发明实施例还提供了一种车辆，所述车辆包括发动机组件，所述车辆可以执行实施例一或实施例二任一所述的基于可变压缩比发动机的暖机控制方法。
在本发明实施例中，一方面，车辆中的暖机控制装置可以按照大于发动机基础压缩比的目标起动压缩比，和大于基础过量空气系数的目标过量空气系数，控制VCR发动机进行冷起动，也即是可以增大起动过程中的发动机压缩比和过量空气系数，从而可以提高起动过程的成功率，改善燃烧过程，降低混合气浓度，并且降低起动过程的油耗和排放。另一方面，车辆中的暖机控制装置可以将暖机目标压缩比基础值和实际工况需求压缩比中的最小值确定为暖机目标压缩比，也即是减小了暖机过程中的发动机压缩比，并且可以增大暖机过程中的点火提前角，进而可以加快暖机速度。
本发明的各个部件实施例可以以硬件实现，或者以在一个或者多个处理器上运行的软件模块实现，或者以它们的组合实现。本领域的技术人员应当理解，可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本发明实施例的计算处理设备中的一些或者全部部件的一些或者全部功能。 本发明还可以实现为用于执行这里所描述的方法的一部分或者全部的设备或者装置程序(例如，计算机程序和计算机程序产品)。这样的实现本发明的程序可以存储在计算机可读介质上，或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到，或者在载体信号上提供，或者以任何其他形式提供。
例如，图6示出了可以实现根据本发明的方法的计算处理设备。该计算处理设备传统上包括处理器1010和以存储器1020形式的计算机程序产品或者计算机可读介质。存储器1020可以是诸如闪存、EEPROM(电可擦除可编程只读存储器)、EPROM、硬盘或者ROM之类的电子存储器。存储器1020具有用于执行上述方法中的任何方法步骤的程序代码1031的存储空间1030。例如，用于程序代码的存储空间1030可以包括分别用于实现上面的方法中的各种步骤的各个程序代码1031。这些程序代码可以从一个或者多个计算机程序产品中读出或者写入到这一个或者多个计算机程序产品中。这些计算机程序产品包括诸如硬盘，紧致盘(CD)、存储卡或者软盘之类的程序代码载体。这样的计算机程序产品通常为如参考图7所述的便携式或者固定存储单元。该存储单元可以具有与图6的计算处理设备中的存储器1020类似布置的存储段、存储空间等。程序代码可以例如以适当形式进行压缩。通常，存储单元包括计算机可读代码1031’，即可以由例如诸如1010之类的处理器读取的代码，这些代码当由计算处理设备运行时，导致该计算处理设备执行上面所描述的方法中的各个步骤。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着，结合实施例描述的特定特征、结构或者特性包括在本发明的至少一个实施例中。此外，请注意，这里“在一个实施例中”的词语例子不一定全指同一个实施例。
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下被实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件 之前的单词“一”或“一个”不排除存在多个这样的元件。本发明可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中，这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (13)

  1. 一种基于可变压缩比发动机的暖机控制方法，其特征在于，应用于暖机控制装置，所述暖机控制装置与可变压缩比发动机连接，所述方法包括：
    当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值；
    获取当前所述可变压缩比发动机的发动机负荷，并根据所述发动机负荷和所述发动机转速，确定点火提前角基础值；
    获取当前所述可变压缩比发动机的暖机实际压缩比，并根据所述暖机实际压缩比，确定点火提前角修正值；
    将所述点火提前角基础值与所述点火提前角修正值相加，获得目标点火提前角；
    根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
  2. 根据权利要求1所述的暖机控制方法，其特征在于，所述根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机，包括：
    根据所述发动机负荷和所述发动机转速，确定实际工况需求压缩比；
    将所述暖机目标压缩比基础值和所述实际工况需求压缩比中的最小值确定为暖机目标压缩比；
    根据所述暖机目标压缩比和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
  3. 根据权利要求1所述的暖机控制方法，其特征在于，所述当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值之前，还包括：
    当检测到所述可变压缩比发动机处于通电且未起动的状态时，获取当前所述可变压缩比发动机的第二发动机温度，并根据所述第二发动机温度，确定目标起动压缩比；所述目标起动压缩比大于发动机基础压缩比；所述第二 发动机温度小于所述第一发动机温度；
    根据所述目标起动压缩比，控制所述可变压缩比发动机进行冷起动。
  4. 根据权利要求1所述的暖机控制方法，其特征在于，所述当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值之前，还包括：
    获取当前所述可变压缩比发动机的起动实际压缩比，并根据所述起动实际压缩比，确定目标过量空气系数；所述目标过量空气系数大于基础过量空气系数；
    根据所述目标过量空气系数，控制所述可变压缩比发动机进行冷起动。
  5. 根据权利要求1所述的暖机控制方法，其特征在于，所述根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机之后，所述方法还包括：
    获取当前所述可变压缩比发动机的第三发动机温度，当所述第三发动机温度达到预设的发动机正常工作温度时，暖机完成。
  6. 一种基于可变压缩比发动机的暖机控制装置，其特征在于，所述暖机控制装置用于控制可变压缩比发动机，所述暖机控制装置包括：
    存储器，其中存储有计算机可读代码；
    一个或多个处理器，当所述计算机可读代码被所述一个或多个处理器执行时，所述暖机控制装置执行如下操作，包括：当检测到所述可变压缩比发动机冷起动成功时，获取当前所述可变压缩比发动机的第一发动机温度和发动机转速，并根据所述第一发动机温度和所述发动机转速，确定暖机目标压缩比基础值；
    获取当前所述可变压缩比发动机的发动机负荷，并根据所述发动机负荷和所述发动机转速，确定点火提前角基础值；
    获取当前所述可变压缩比发动机的暖机实际压缩比，并根据所述暖机实际压缩比，确定点火提前角修正值；
    将所述点火提前角基础值与所述点火提前角修正值相加，获得目标点火提前角；
    根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
  7. 根据权利要求6所述的暖机控制装置，其特征在于，所述根据所述暖机目标压缩比基础值和所述目标点火提前角，控制所述可变压缩比发动机进行暖机的操作包括：
    根据所述发动机负荷和所述发动机转速，确定实际工况需求压缩比；
    将所述暖机目标压缩比基础值和所述实际工况需求压缩比中的最小值确定为暖机目标压缩比；
    根据所述暖机目标压缩比和所述目标点火提前角，控制所述可变压缩比发动机进行暖机。
  8. 根据权利要求6所述的暖机控制装置，其特征在于，所述操作还包括：
    当检测到所述可变压缩比发动机处于通电且未起动的状态时，获取当前所述可变压缩比发动机的第二发动机温度，并根据所述第二发动机温度，确定目标起动压缩比；所述目标起动压缩比大于发动机基础压缩比；所述第二发动机温度小于所述第一发动机温度；
    根据所述目标起动压缩比，控制所述可变压缩比发动机进行冷起动。
  9. 根据权利要求6所述的暖机控制装置，其特征在于，所述操作还包括：
    获取当前所述可变压缩比发动机的起动实际压缩比，并根据所述起动实际压缩比，确定目标过量空气系数；所述目标过量空气系数大于基础过量空气系数；
    根据所述目标过量空气系数，控制所述可变压缩比发动机进行冷起动。
  10. 根据权利要求6所述的暖机控制装置，其特征在于，所述操作还包括：
    获取当前所述可变压缩比发动机的第三发动机温度，当所述第三发动机温度达到预设的发动机正常工作温度时，暖机完成。
  11. 一种发动机组件，其特征在于，包括：
    可变压缩比发动机，以及和所述可变压缩比发动机连接的暖机控制装 置，所述暖机控制装置为根据权利要求6-10任一项所述的暖机控制装置。
  12. 一种车辆，其特征在于，所述车辆包括如权利要求11所述的发动机组件。
  13. 一种计算机可读介质，其特征在于，其中存储了计算机可读代码，当所述计算机可读代码被计算处理设备执行时，所述计算处理设备执行如权利要求1-5中任一项所述的基于可变压缩比发动机的暖机控制方法。
PCT/CN2020/108813 2019-09-27 2020-08-13 可变压缩比发动机的控制方法及装置 WO2021057304A1 (zh)

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