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Control method for variable-period upshifting process of multi-gear-by-wire automatic transmission

An automatic transmission and process control technology, applied in transmission control, vehicle gearbox, multi-gear ratio transmission, etc., can solve the problems of high cost, complex overall structure of the transmission, increased control difficulty and complexity, etc.

Active Publication Date: 2017-01-25
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Control method for variable-period upshifting process of multi-gear-by-wire automatic transmission
  • Control method for variable-period upshifting process of multi-gear-by-wire automatic transmission
  • Control method for variable-period upshifting process of multi-gear-by-wire automatic transmission

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Embodiment Construction

[0037] 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.

[0038] A method for controlling the variable-period upshifting process of a multi-gear automatic transmission by wire. The control device for realizing the multi-gear automatic transmission by wire according to the embodiment of the present invention includes an engine 200, a D gear switch D-SW, a vehicle speed sensor VSS, and an accelerator pedal position The sensor APS, the electronic control unit 100, the first gear electromagnetic clutch 41, the second gear electromagnetic clutch 4...

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Abstract

The invention discloses a method for controlling the variable-period upshifting process of a multi-gear-by-wire automatic transmission. In the method, the electronic control unit detects the switch signal of the D gear, the vehicle speed signal v of the vehicle speed sensor, and the opening degree signal α of the accelerator pedal position sensor. Determine whether it is necessary to upgrade from the first gear to the second gear, from the second gear to the third gear, and from the third gear to the fourth gear, and carry out the current control of the electromagnetic clutch in each gear up process. Taking the second gear to the third gear as an example, the electronic control unit controls the cycle function T(v) variablely, and at the same time presses the third gear electromagnetic clutch current function I3b(t)={I3,0≤t≤Tδ;kI3+ I3(1‑k)(t‑Tδ) / (T23‑Tδ),Tδ

Description

technical field [0001] The invention relates to a control method of an automatic transmission, more precisely, a control method for a variable-period upshift process 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/00F16H59/02
CPCF16H59/0204F16H61/0204F16H61/0437F16H61/2807F16H2059/0234F16H2061/0223F16H2200/0021
Inventor 任传波曲金玉田香玉朱慎超
Owner SHANDONG UNIV OF TECH
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