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A shift control method for a hybrid vehicle

A technology of a hybrid vehicle and a control method, which is applied in the field of vehicles, can solve problems such as large torque loss at the rear wheel end, and achieve the effects of improving driving experience, reducing acceleration fluctuations, and improving ride comfort

Active Publication Date: 2020-08-28
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] An object of the present invention is to provide a shift control method for a hybrid vehicle to solve the problem that the hybrid vehicle has a large loss of wheel end torque before and after shifting

Method used

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  • A shift control method for a hybrid vehicle

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Embodiment Construction

[0038] The invention provides a shift control method for a hybrid vehicle. Generally, a hybrid vehicle includes an engine, an electric motor, and a dual-clutch gearbox. The dual-clutch transmission includes an odd-numbered clutch and an even-numbered clutch. The odd-numbered clutch is used to engage the engine with the odd-numbered gears in the dual-clutch transmission, and the even-numbered clutch is used to engage the engine with the even-numbered gears in the dual-clutch transmission. .

[0039] figure 1 is a flowchart of a shift control method according to an embodiment of the present invention. Such as figure 1 As shown, in one embodiment, the shift control method includes the following steps:

[0040] S10: Calculate the engine target gear and the motor target gear according to the current accelerator opening, vehicle speed and engine speed. That is, when the accelerator is stepped on under the current working condition of the vehicle, the gears that need to be switc...

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Abstract

The invention provides a gear-shifting control method for a hybrid vehicle, and belongs to the field of vehicles. The gear-shifting control method comprises the steps of calculating an engine target gear position and a motor target gear position according to a current throttle opening degree, a vehicle speed and an engine rotation speed, controlling an engine to switch to the engine target gear position and controlling a motor to switch to the motor target gear position, calculating an inertia loss value of the engine when switching to the engine target gear position, calculating a total target torque transmitted to a wheel end through a dual-clutch transmission based on the inertia loss value, calculating an engine wheel end torque currently transmitted by the engine to the wheel end, calculating a torque that the motor needs to compensate according to the total target torque and the engine wheel end torque, and enabling the motor to perform a corresponding output according to the torque which needs to be compensated. The gear-shifting control method can solve the problem of large loss of wheel end torques of the hybrid vehicle before and after gear shifting.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a shift control method for a hybrid vehicle. Background technique [0002] For reasons such as environmental protection and energy saving, hybrid vehicles have been more and more widely recognized and used by countries all over the world. In the prior art, due to the physical characteristics of the traditional transmission, the transmission ratio of the engine changes during gear shifting, resulting in a decrease in the torque transmitted to the wheel ends during the gear shifting process, resulting in fluctuations in acceleration. Especially when shifting gears in low gears, the transmission ratio changes greatly, and the corresponding wheel end torque loss is also relatively large, resulting in uneven gear shifting and affecting the drivability of the vehicle. Hybrid vehicles also have the above-mentioned problems. [0003] Therefore, how to eliminate the problem that the hybrid vehic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/19B60W20/10B60W10/06B60W10/08B60W10/10
CPCB60W10/06B60W10/08B60W10/10B60W20/10B60W30/19B60W2510/0638B60W2520/10B60W2540/10B60W2710/0666B60W2710/083Y02T10/62
Inventor 张剑锋姜博尚武刚林潇张毅华
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD
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