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Control method of variable current reverse gear starting for multi-gear-by-wire automatic transmission

A technology of automatic transmission and control method, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as increased control difficulty and complexity, high cost, and complex overall structure of the transmission, and achieve The effect of avoiding engine stall and increasing the transmission torque smoothly

Inactive Publication Date: 2017-02-15
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These hydraulic control mechanisms make the overall structure of the transmission complex, high cost and increase the difficulty and complexity of control

Method used

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  • Control method of variable current reverse gear starting for multi-gear-by-wire automatic transmission
  • Control method of variable current reverse gear starting for multi-gear-by-wire automatic transmission
  • Control method of variable current reverse gear starting for multi-gear-by-wire automatic transmission

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Embodiment Construction

[0026] Below in conjunction with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are described in detail. Obviously, the described embodiments are only part of the embodiments of the present invention, not all embodiments; based on the present invention Embodiments, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027]A method for controlling start-up of a multi-speed by-wire automatic transmission with variable current and reverse gear. The control device for the multi-speed by-wire automatic transmission that realizes the control method includes an engine 200, a vehicle speed sensor VSS, an R gear switch R-SW, and an electronic control unit 100. , Reverse electromagnetic clutch 4R.

[0028] The housing 2 is fixedly installed with a first-gear electromagnetic clutch brush 412, a second-gear ...

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Abstract

The invention discloses a variable current reverse gear start control method of a multi-gear wire-controlled automatic transmission. The method detects R The gear switch signal and the vehicle speed signal v of the vehicle speed sensor are respectively controlled by the electronic control unit according to the current function Ia(t)=I1(0≤t≤Tδ) of the reverse gear electromagnetic clutch in the first stage and the current of the reverse gear electromagnetic clutch in the second stage The function Ib(v)=αI1+βI1v / v1 (0≤v≤v1) controls the energizing current of the reverse gear electromagnetic clutch to realize the reverse gear start control of the automatic transmission by wire. This start control method can meet the driving habits of different drivers. Avoid engine flameout during start-up, and realize stable start-up of automatic transmission by wire.

Description

technical field [0001] The invention relates to a control method of an automatic transmission, more precisely, a control method for starting a reverse gear with variable current of a multi-speed wire-controlled automatic transmission. Background technique [0002] Automatic transmissions are widely used in various vehicles such as automobiles, electric vehicles, and construction machinery. The existing automatic transmissions mainly include hydromechanical automatic transmission (AT), metal belt continuously variable automatic transmission (CVT), mechanical automatic transmission (AMT) and dual clutch automatic transmission (DCT). [0003] The above-mentioned four types of automatic transmissions all adopt electronically controlled hydraulic servo devices to realize the control of the shifting process, which has complex structure, high cost and increased control difficulty and complexity. In particular, the executive mechanism of DCT includes: oil supply mechanism composed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/04
CPCF16H59/50F16H59/68F16H61/0246
Inventor 田香玉曲金玉殷允朝朱慎超
Owner SHANDONG UNIV OF TECH
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