Shifting method and shifting system of hybrid electric vehicle

A technology for hybrid electric vehicles and shifting methods, which is applied to hybrid electric vehicles, motor vehicles, power plants, etc., can solve the problems of long shifting time, power waste, and short service life of clutches, so as to prolong the service life and ensure accurate performance and reduce shift time

Active Publication Date: 2015-08-12
BEIQI FOTON MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method can solve the problems of long shifting t...

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  • Shifting method and shifting system of hybrid electric vehicle
  • Shifting method and shifting system of hybrid electric vehicle
  • Shifting method and shifting system of hybrid electric vehicle

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or e...

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Abstract

The invention provides a shifting method and a shifting system of a hybrid electric vehicle. The hybrid electric vehicle comprises an engine, a clutch, a synchronizer, an electric generator and a drive motor. The engine, the electric generator, the clutch and the drive motor are connected in series in turn; the clutch is connected to the electric generator and the drive motor. The shifting method comprises the steps of receiving a shifting instruction and quickly reducing torque of the engine through negative torque provided by the electric generator, and determining a target gear according to the shifting instruction; separating the clutch to perform shifting operation when the input torque of the clutch is less than the safety torque of the clutch. According to the shifting method disclosed by the embodiment of the invention, the clutch is separated to perform shifting operation when the input torque of the clutch is less than the safety torque of the clutch, thus the shifting time is reduced, the efficiency of power transmission is improved, emissions are reduced, and the service life of the clutch is prolonged.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a gear shifting method and system for a hybrid electric vehicle. Background technique [0002] At present, automatic transmissions used in automobiles can be divided into hydraulic automatic transmissions (AT), continuously variable automatic transmissions (CVT) and electromechanical automatic transmissions (AMT). Among them, the electromechanical automatic transmission (AMT) is based on the manual transmission, and uses an electronic control device instead of human operation to perform clutch separation and combination, gear selection and other operations. [0003] Shift time is a comprehensive indicator of AMT shift quality. The existing gear shifting method is to disengage the clutch when the input torque of the clutch is completely reduced to 0, and then perform processes such as removing gears and engaging gears, thereby increasing the gear shifting time. In addition, ...

Claims

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Application Information

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IPC IPC(8): B60W30/19B60W10/02B60W10/06B60W10/08B60K6/46
CPCB60K6/46B60W10/02B60W10/06B60W10/08B60W30/19B60W2710/021B60W2710/0666B60W2710/081Y02T10/62
Inventor 邹正佳孔令安鲁连军艾名升
Owner BEIQI FOTON MOTOR CO LTD
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