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Idle speed control method and device of hybrid electric vehicle and vehicle

A hybrid vehicle, idle speed control technology, applied in hybrid vehicles, control devices, electric vehicles, etc., can solve problems such as large clutch slip and friction difference, increased power consumption, and easy noise generation.

Active Publication Date: 2021-09-10
HYCET TRANSMISSION SYST (JIANGSU) CO LTD BAODING RES & DEV BRANCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the control strategy of the related art, the motor needs to keep idle speed for a long time, which causes noise to be easily generated during idle speed, and greatly increases power consumption. At the same time, it also leads to a large slip-friction difference of the clutch during the creeping process, which continuously increases the wear degree of the clutch. , reduce the service life of the clutch, and the user experience is poor

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  • Idle speed control method and device of hybrid electric vehicle and vehicle
  • Idle speed control method and device of hybrid electric vehicle and vehicle
  • Idle speed control method and device of hybrid electric vehicle and vehicle

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Embodiment Construction

[0053] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0054] The present invention is made by the inventor based on the following problems and awareness:

[0055] In related technologies, creep control is usually implemented through the following control strategies, specifically as follows:

[0056] The first control strategy is: directly close the clutch during the creeping process, and realize creeping by controlling the motor speed; the second control strategy is: TCU requests a constant idle speed for the motor under any working conditions, and realizes creeping by controlling the clutch. Among them, creeping refers to a state in which the whole vehicle goes from static to stable speed after the shift lever is in D or R, the brake is released, and the accelerator is not stepped on.

[0057] However, since the engine starts to rely on the P2 motor to drive ...

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Abstract

The invention relates to the technical field of automobiles, in particular to an idle speed control method and device of a hybrid electric vehicle and a vehicle. The method comprises the following steps: the current driving mode of the hybrid electric vehicle is detected; when it is detected that the current driving mode is the pure electric mode, an idle speed request of the hybrid electric vehicle is received; and a target idle speed of the hybrid electric vehicle is generated according to the idle speed request, and the P2 motor output torque of the hybrid electric vehicle is controlled according to the target idle speed until the creeping speed is reached. According to the method, noise generated by long-time idling can be effectively avoided, the power consumption and the slip friction difference of the clutch in the crawling process are reduced, the abrasion degree of the clutch is reduced, the service life of the clutch is prolonged, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an idle speed control method, device and vehicle of a hybrid electric vehicle. Background technique [0002] For a hybrid vehicle equipped with a P2 hybrid module and DCT (Dual Clutch Transmission, dual clutch automatic transmission) structure, when the driving mode is pure electric mode, the whole vehicle can be powered by the P2 motor in the hybrid module, and usually through the following The control strategy realizes creeping in pure electric mode: [0003] Under any working conditions, the TCU (Transmission Control Unit, automatic transmission control unit) requests a constant idle speed for the motor, and realizes creeping by controlling the clutch. Among them, creeping refers to a state in which the shift lever is in the D or R gear, the brake is released, and the accelerator is not stepped on, and the whole vehicle goes from stationary to a stable speed. [0004] Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W10/08B60W10/02B60W20/00B60L15/20
CPCB60W30/18072B60W30/18063B60W10/08B60W10/02B60W20/00B60L15/20B60L2240/423Y02T10/72
Inventor 谢立臣戴晓丹徐雷李韶锁刘大权梁磊
Owner HYCET TRANSMISSION SYST (JIANGSU) CO LTD BAODING RES & DEV BRANCH
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