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Hybrid electric vehicle engine automatic start control method

A hybrid vehicle and engine technology, used in hybrid vehicles, motor starting for engines, and engine starting, etc., can solve the problems of long engine automatic start time, long power delay time, affecting acceleration performance, etc., and achieve optimized power smoothness. performance, shortening the power interruption time, and meeting the needs of starting smoothness

Active Publication Date: 2021-03-02
海博瑞德(北京)汽车技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing engine automatically starts for a long time and is not smooth. There is an obvious power interruption during driving, which affects the overall acceleration performance, and the power delay time is relatively long.

Method used

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  • Hybrid electric vehicle engine automatic start control method

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Embodiment Construction

[0031] The method for controlling the automatic start-up of the engine of the hybrid electric vehicle provided by the present invention will be further described in detail and completely below in conjunction with the embodiments. The embodiments described below are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] The hybrid electric vehicle engine automatic starting control method is used in the hybrid electric vehicle, and the motor is used to start the engine. After starting, the engine participates in driving the vehicle.

[0033] The car includes an engine, a motor, a clutch, a gear transmission mechanism, a mode transmission mechanism, a gearbox input shaft and a gearbox output shaft, the engine is connected to the gearbox input shaft through the clutch, and the gearbox output shaft is connected to the differential of the car The gearbox input shaft and the gearbox output shaft are connected throug...

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Abstract

The invention discloses a control method for automatic starting of a hybrid electric vehicle engine. S1: when t1<t<t2, the control system does not receive a brake or accelerator signal, and the car is driven by a motor alone; S2: when t2≤t≤t3, the driving The driver steps on the accelerator, and the control system controls the clutch from the open state to the creep point after receiving the signal of the accelerator pedal, and the clutch torque Tc(t) increases to drag the engine to start, and at the same time the control system controls the motor output torque Tm(t) increase, so that the actual torque Ts(t) remains unchanged, and the control system adjusts the engine speed to the starting speed v q ; S3: When t3<t≤t4, the clutch is from the creep point to closed, the actual torque Ts(t) of the vehicle remains unchanged, and the control system issues an instruction to adjust the engine speed at the same time, so that the growth rate of the engine speed is consistent with the growth rate of the vehicle speed. The hybrid vehicle of the present invention completes the automatic starting control of the engine, and the starting process is smooth and fast.

Description

technical field [0001] The invention belongs to the technical field of electric and hybrid vehicles, in particular to a method for automatically starting a hybrid vehicle engine. Background technique [0002] Hybrid vehicles are driven by engines and / or motors, and are distinguished by different numerical codes according to the different positions of the drive motors in the hybrid power transmission system, which are respectively P0, P1, P2, P3, and P4 configuration hybrid power systems , the motors of each configuration are P0 motor, P1 motor, P2 motor, P3 motor and P4 motor. The P2 motor is placed before the gearbox input shaft, after the clutch connected to the engine, and the P3 motor is placed after the gearbox output shaft. The mode in which the P2 motor and the engine jointly drive the vehicle is the P2 hybrid mode, and the mode in which the P3 motor and the engine jointly drive the vehicle is the P3 hybrid mode. [0003] The current driving logic of hybrid vehicles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/02B60W20/10B60W30/18B60W20/20B60W20/40F02N11/08
CPCB60W10/02B60W10/06B60W10/08B60W20/10B60W20/20B60W20/40B60W30/18063B60W2510/0275B60W2510/0638B60W2510/081B60W2510/1015B60W2520/10B60W2710/0666B60W2710/083F02N11/0803Y02T10/62
Inventor 陈超张路李晓林刘丽靖
Owner 海博瑞德(北京)汽车技术有限公司
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