Engine control method and device of hybrid electric vehicle and hybrid electric vehicle

A hybrid vehicle and control method technology, which is applied to hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems that the engine and the clutch cannot be well matched, the user has a strong sense of shock and frustration, and the power output is uneven. Short switching time, good driving experience and smooth power output

Active Publication Date: 2020-04-28
SAIC MOTOR
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AI Technical Summary

Problems solved by technology

[0005] However, in the process of closing the clutch, there is a speed difference between the engine and the clutch when they are in contact, which will make the engine and the clutch unable to match well, resulting in uneven power output when the car switches from pure electric mode to parallel mode. The switching time is long, which makes the user feel strong shock and frustration, which seriously affects the driving experience

Method used

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  • Engine control method and device of hybrid electric vehicle and hybrid electric vehicle
  • Engine control method and device of hybrid electric vehicle and hybrid electric vehicle
  • Engine control method and device of hybrid electric vehicle and hybrid electric vehicle

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Embodiment Construction

[0029] As mentioned above, in the prior art, when a hybrid electric vehicle switches from pure electric mode to parallel mode, the engine will intervene to provide driving force. In the process of closing the clutch, there is a speed difference between the engine and the clutch when they are in contact with each other, which will make the engine and the clutch unable to match well, resulting in uneven power output when the car switches from pure electric mode to parallel mode, and the switching time The longer length makes the user feel a strong sense of shock and frustration, which seriously affects the driving experience.

[0030] The inventor of the present invention has found through research that the key to the above problem is that in the prior art, the engine is started at the idle speed, and then the engine is actively synchronized to adjust the speed from the idle speed to the target speed, which takes a long time, and when the clutch is closed afterwards The problem ...

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Abstract

The invention relates to a method and a device for controlling an engine of a hybrid electric vehicle, and the hybrid electric vehicle. The method comprises the following steps: when the hybrid electric vehicle is switched to a parallel mode from a pure electric mode, speeding the engine to a target speed before the engine is started, and closing a clutch; controlling the engine to start so as toenable the engine to output drive torque via the clutch. After the method and the device are adopted, in a process of switching the hybrid electric vehicle to the parallel mode from the pure electricmode, the power output is enabled to be smoother, and the switching time is shortened, so that better driving experience is provided for a user.

Description

technical field [0001] The invention relates to the field of hybrid electric vehicle power source control, in particular to an engine control method and device of a hybrid electric vehicle and the hybrid electric vehicle. Background technique [0002] Hybrid vehicles usually use two power sources, the engine and the electric motor, to provide driving force for the car, and switch between different power source output combinations to form different power flow transmissions, which can meet the needs of users in different situations. [0003] Specifically, when the electric motor is used for pure electric drive, the energy utilization rate can be effectively improved, resulting in better economy. When the engine and the motor are connected in series, the generator is used to drive the generator to charge the battery, and then drive the car through the motor, which can keep the engine in the best working condition for a long time, so as to improve fuel efficiency, save energy an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/02B60W20/15B60W20/40
CPCB60W10/02B60W10/06B60W20/40B60W2710/021B60W2710/0644
Inventor 张鹏君邱国茂罗翔赵沂龙一兵
Owner SAIC MOTOR
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