Hybrid vehicle engine stalling control method and system
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A technology of hybrid electric vehicles and control methods, which is applied to hybrid vehicles, motor vehicles, control devices, etc., can solve the problems of long flameout time, and achieve the effects of smooth flameout process, comfortable driving experience, flameout impact and vibration optimization
Active Publication Date: 2019-08-09
ZHEJIANG GEELY HLDG GRP CO LTD +1
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The current engine flameout control is generally realized by cutting off the oil and closing the throttle valve, and the flameout time is relatively long, especially when the engine is flamed out in situ, ther
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Embodiment 1
[0051] See attached Figure 1 ~ Figure 4 , the present embodiment provides a hybrid vehicle engine flameout control method, the control method can be applied to a hybrid system based on the P2.5 architecture, the hybrid system includes an engine 1, two clutches 2, a high-voltage motor 3 and The transmission system 4 of the vehicle, the vehicle with the hybrid power system needs to turn off the engine during driving, and the high-voltage motor 3 can be used to drag the engine 1 to turn off.
[0052] The hybrid electric vehicle engine start control method comprises the following steps:
[0053]Obtaining vehicle status data in response to an engine shutdown request;
[0054] judging whether the state data satisfies a preset condition;
[0055] If the state data satisfies the preset condition, control the high-voltage motor to combine with the clutch; calculate the stall torque of the high-voltage motor, drag the engine speed down according to the stall torque of the high-voltag...
Embodiment 2
[0096] See attached Figure 1 ~ Figure 4 , the present embodiment provides a hybrid vehicle engine flameout control method, the control method can be applied to a hybrid system based on the P2.5 architecture, the hybrid system includes an engine 1, two clutches 2, a high-voltage motor 3 and The transmission system 4 of the vehicle, the vehicle with the hybrid power system needs to turn off the engine during driving, and the high-voltage motor 3 can be used to drag the engine 1 to turn off.
[0097] The hybrid electric vehicle engine start control method comprises the following steps:
[0098] Obtaining vehicle status data in response to an engine shutdown request;
[0099] judging whether the state data satisfies a preset condition;
[0100] If the state data satisfies the preset condition, control the high-voltage motor to combine with the clutch; calculate the stall torque of the high-voltage motor, drag the engine speed down according to the stall torque of the high-volta...
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Abstract
The invention discloses a hybrid vehicle engine stalling control method and system. The hybrid vehicle engine stalling control method comprises the following steps of responding to an engine stallingrequest to obtain state data of a vehicle; judging whether the state data satisfy a preset condition or not; if the state data satisfy the preset condition, controlling a high voltage motor to be combined with a clutch; calculating a stalling torque of the high voltage motor; reversely towing an engine to enable an engine rotation speed to descend till the engine rotation speed is zero according to the stalling torque of the high voltage motor so as to finish engine stalling; and if the state data do not satisfy the preset condition, blocking the fuel transmission of the vehicle to control theengine to stall. According to the hybrid vehicle engine stalling control method and system, by using the high voltage motor to tow the engine during stalling, the engine rotation speed is rapidly reduced to 0 so that the stalling process is more smooth; and meanwhile, the high voltage motor reversely tows the engine when the engine stalls, the process is equivalent to that the engine outputs an output torque to charge a battery, and therefore, a small quantity of kinetic energy can be recovered, and the cost can be saved.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for controlling engine flameout of a hybrid electric vehicle. Background technique [0002] With the development of the global automobile industry, the production, sales and ownership of automobiles are also increasing year by year. However, due to the exhaust gas emissions and environmental pollution of commonly used fuel engine vehicles, new energy vehicles that are energy-saving and environmentally friendly are gradually developing. Get up and start replacing gas engine cars. Due to the problems of short mileage and slow charging of pure electric vehicles, hybrid vehicles have become the focus and development point of the automotive industry. my country is a country with tens of millions of cars. With the increasing number and types of cars and the growing Chinese auto market, the driving comfort of cars has attracted more and more attention from custo...
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