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Automobile speed ratio control method and device, gearbox controller, system and automobile

A control method and vehicle speed technology, applied in the field of vehicles, can solve problems such as low user experience, the failure of the gearbox to meet the acceleration requirements, and the rapid acceleration of the vehicle with the gearbox.

Active Publication Date: 2021-09-07
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the speed ratio of the gearbox in the prior art rises too fast to the target speed ratio and the vehicle accelerates too fast. The problem of low user experience caused by the expected acceleration demand

Method used

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  • Automobile speed ratio control method and device, gearbox controller, system and automobile
  • Automobile speed ratio control method and device, gearbox controller, system and automobile
  • Automobile speed ratio control method and device, gearbox controller, system and automobile

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Embodiment Construction

[0046] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with a preferred embodiment, it does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present invention. The following description contains numerous specific details in order to provide a thorough understanding of the present invention. The invention may also be practiced without these details. Also, some specific details will be omitted from the description in order to avoid obscuring or obscuring the gist of the present invent...

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PUM

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Abstract

The invention discloses an automobile speed ratio control method and device, a gearbox controller, a system and an automobile. After an actual demand torque value of an output shaft end of a gearbox and an expected demand torque value of the output shaft end of the gearbox are calculated, the difference between the actual demand torque value and the expected demand torque value is calculated; after the torque difference value obtained through difference making exceeds the preset value, the change rate of the actual speed ratio of the gearbox can be controlled to be reduced to the target value, the problems that when the actual speed ratio of the gearbox rises to the target speed ratio too fast, the transmission torque of the gearbox is too large and a vehicle accelerates too fast are solved, and meanwhile, when the torque difference value is too large, it indicates that a user expects the automobile acceleration change rate to be kept at the relatively-low value at the moment. According to the method, the change rate of the actual speed ratio of the gearbox can be controlled to be reduced to the target value, the purposes of meeting the requirements of the user and the acceleration requirement expected by the user are achieved, and the user experience is improved.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to an automobile speed ratio control method, device, transmission controller, system and automobile. Background technique [0002] With the rapid development of the automobile industry and the continuous use of new automobile technologies, a new technology in the automobile transmission system has attracted the attention of the automobile industry, that is, Continuously Variable Transmission (CVT), CVT can be called the most An ideal automotive transmission, the control strategy of CVT is to make the engine always run along the best economic line by continuously changing the speed ratio, so as to improve the vehicle economy. Among them, for a CVT gearbox, the speed ratio control of the gearbox is one of the main control parameters. When the speed ratio of the gearbox rises to the target speed ratio too quickly, it is likely to cause too much torque transmitted by the gearbox, causing the veh...

Claims

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Application Information

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IPC IPC(8): F16H59/16F16H59/70F16H59/74F16H61/02
CPCF16H61/0204F16H59/16F16H59/70F16H59/74F16H2306/40
Inventor 蒋昌恺李越
Owner SAIC MOTOR
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