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Multi-gear hybrid power system control method capable of reducing power change impacting

A technology of a hybrid power system and a control method, which is applied in the field of multi-speed hybrid power system control for improving the impact of power changes, can solve problems such as affecting drivability, vehicle frustration, lack of power, etc., so as to improve ride comfort and fuel economy. , the effect of improving ride comfort

Inactive Publication Date: 2020-11-24
DONGFENG MOTOR CORP HUBEI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the existing multi-mode hybrid power transmission system can realize multiple operating modes, it ignores the power switching between different operating modes and the impact on ride comfort and fuel economy due to power interruption during the shift operation. Problems, such as the multi-mode hybrid power transmission system is switched from the drive motor to the first gear of the engine. In this process, due to the direct switching of the power source, there will be no power at the moment of switching, which will cause the vehicle to feel frustrated, affect the drivability and also cause the vehicle to fail. NVH (NVH: Noise, Vibration, Harshness) problems bring complaints from customers; or the power source is switched from the first gear of the engine to the second gear of the engine. During this process, due to the separation and combination of the clutch, the vehicle will instantly lose power, which will lead to Vehicle stuttering

Method used

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  • Multi-gear hybrid power system control method capable of reducing power change impacting
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  • Multi-gear hybrid power system control method capable of reducing power change impacting

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Embodiment Construction

[0022] pass below Figure 1 ~ Figure 3 As well as listing some optional embodiments of the present invention, the technical solutions (including preferred technical solutions) of the present invention are further described in detail. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] The invention discloses a control method for a multi-speed hybrid power system that improves the impact of power changes. 1 When -δ and the throttle opening ≤ β and other signals), the total torque T remains constant, and the engine power is connected to couple the engine power with the driving motor power, and the engine torque T 1 ε to reach the total torque T 1 After that, the driving motor is disconnected, and the eng...

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Abstract

The invention discloses a multi-gear hybrid power system control method capable of reducing power change impacting. When the conditions of the speed and the like of a hybrid electric vehicle reach thepower switching or gear shifting condition, an extra power source intervenes in advance and is coupled with an original power source, when the power source power obtained after switching reaches a preset value, power is switched, vehicle power change smoothness is achieved, and the problems of vehicle impacting and NVH brought by power changes are avoided.

Description

technical field [0001] The invention belongs to the technical field of automobile hybrid power systems, and specifically discloses a control method for a multi-speed hybrid power system that improves the impact of power changes. Background technique [0002] At present, with the popularity of hybrid vehicles, multi-mode hybrid powertrains are widely used. Although the existing multi-mode hybrid power transmission system can realize multiple operating modes, it ignores the power switching between different operating modes and the impact on ride comfort and fuel economy due to power interruption during the shift operation. Problems, such as the multi-mode hybrid power transmission system is switched from the drive motor to the first gear of the engine. In this process, due to the direct switching of the power source, there will be no power at the moment of switching, which will cause the vehicle to feel frustrated, affect the drivability and also cause the vehicle to fail NVH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/40B60W20/15
CPCB60W20/40B60W2510/0604B60W2510/0657B60W2510/083B60W2520/10B60W2520/105B60W20/15
Inventor 薛龙聂少文余秋石严军雷君
Owner DONGFENG MOTOR CORP HUBEI
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