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Control method of variable current 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 flameout and smooth increase of transmission torque

Active Publication Date: 2016-08-24
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 of variable current starting for multi-gear-by-wire automatic transmission
  • Control method of variable current starting for multi-gear-by-wire automatic transmission
  • Control method of variable current 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 variable current starting control method for a multi-speed by-wire automatic transmission, the control device of the multi-speed by-wire automatic transmission for realizing the control method includes an engine 200, a vehicle speed sensor VSS, a D-speed switch D-SW, an electronic control unit 100, an Gear electromagnetic clutch 41.

[0028] The housing 2 is fixedly installed with a first-gear electromagnetic clutch brush 412, a second-gear electromagnetic clutch brush 422, a...

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Abstract

The invention discloses a method for controlling the starting of varying electric currents of a multi-gear wire-controlled automatic speed changer. The method realizes the control for the first-gear starting of the wire-controlled automatic speed changer by setting a vehicle speed value V0 at the end of the starting, setting the shortest electrifying time Tdelta required for eliminating the separation gap of a first-gear electromagnetic clutch, detecting the signal of a D-gear switch and the vehicle speed signal v of a vehicle speed sensor, and controlling the electrifying electric currents of the first-gear electromagnetic clutch by an electric control unit respectively according to the function Ia(t)=I1(0 is smaller than or equal to t, and t is smaller than or equal to Tdelta) of the electrifying electric current of the first-gear electromagnetic clutch at a first stage and the function Ib(v)=alphaI1+betaI1v / v1(0 is smaller than or equal to v, and v is smaller than or equal to v1) of the electrifying electric current of the first-gear electromagnetic clutch at the first stage. The starting control method can satisfy the driving habits of different drivers, prevent an engine from flameout in the starting process, and realize the smooth starting of the wire-controlled automatic speed changer.

Description

technical field [0001] The invention relates to a control method of an automatic transmission, more precisely, a variable current 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, hydra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/04
CPCF16H61/0204F16H61/0437
Inventor 田香玉曲金玉朱慎超殷允朝
Owner SHANDONG UNIV OF TECH
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