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Pulse Width Modulation Start Control Method for Multi-speed Wire-by-Wire Automatic Transmission

A technology of automatic transmission and control method, applied in the direction of transmission control, elements with teeth, belt/chain/gear, etc., can solve the problems of increasing control difficulty and complexity, complex overall structure of the transmission, and high cost, avoiding the Engine flameout, good dynamic response, simple and flexible control

Inactive Publication Date: 2017-01-18
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
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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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  • Pulse Width Modulation Start Control Method for Multi-speed Wire-by-Wire Automatic Transmission
  • Pulse Width Modulation Start Control Method for Multi-speed Wire-by-Wire Automatic Transmission
  • Pulse Width Modulation Start Control Method for Multi-speed Wire-by-Wire Automatic Transmission

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Embodiment Construction

[0025] 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.

[0026] A pulse width modulation starting control method for a multi-gear automatic transmission by wire. The control device for realizing the multi-speed automatic transmission by wire according to the embodiment of the present invention includes an engine 200, a vehicle speed sensor VSS, a D gear switch D-SW, and an electronic control unit 100 , First block electromagnetic clutch 41.

[0027]The housing 2 is fixedly installed with a first-gear electromagnetic clutch brush 412, a seco...

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Abstract

The invention discloses a pulse width modulation starting control method of a multi-gear wire-controlled automatic transmission. The method detects a D gear switch signal and a vehicle speed signal v of a vehicle speed sensor by setting a starting end vehicle speed value v0 and a fixed cycle control period T0. The electronic control unit controls the energization pulse width of the first-speed electromagnetic clutch according to the cyclic energization pulse width determined by the cyclic energization pulse width function T(v)=(1+α)Tδ+βTδv / v0, so as to realize the first-gear start of the automatic transmission by wire Control, the start control method can meet the driving habits of different drivers, avoid engine stalling during the start process, and realize the stable start of the automatic transmission by wire.

Description

technical field [0001] The invention relates to a control method of an automatic transmission, more precisely, a pulse width modulation starting control method 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 of hydraulic pump,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/32F16H61/02
CPCF16H61/0204F16H61/32F16H2306/00
Inventor 曲金玉田香玉任传波朱慎超
Owner SHANDONG UNIV OF TECH
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