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Automatic transmission controls

A technology for automatic transmissions and control devices, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as damage to frictional joint components, and achieve the effect of preventing the reduction of drivability

Active Publication Date: 2021-06-01
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive frictional heat generation causes damage to frictional engagement elements

Method used

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  • Automatic transmission controls
  • Automatic transmission controls
  • Automatic transmission controls

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Experimental program
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Embodiment Construction

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the embodiment described below is an example, and this invention is not limited to this embodiment.

[0022] First, refer to figure 1 The overall structure of the vehicle will be described. Such as figure 1 As shown, the vehicle 1 includes: an engine 10 ; a DCT 2 (automatic transmission) including a first clutch 20 , a second clutch 30 , a transmission unit 40 , and a hydraulic circuit 90 ; and a control device 50 . Further, on the output side of the DCT 2 , drive wheels are connected so as to be capable of power transmission via a propeller shaft and a differential gear (not shown).

[0023] The engine 10 is, for example, a diesel engine. Based on the accelerator opening Acc of the accelerator pedal detected by the accelerator opening sensor 101 , the output rotation speed (hereinafter referred to as "engine rotation speed") and the output to...

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PUM

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Abstract

The present invention provides a control device for an automatic transmission capable of performing shift control capable of preventing deterioration of drivability while preventing excessive heat generation of frictional engagement elements when the frictional engagement elements are engaged and switched. A control device for an automatic transmission includes: a gear shift condition determination unit for determining whether a gear shift condition for a vehicle transmission that shifts gears with a plurality of frictional engagement elements is satisfied; The establishment determination unit decreases the output torque of the transmission by a certain amount before the engagement switching of the plurality of frictional engagement elements is determined to be established when the shift condition is established.

Description

technical field [0001] The invention relates to a control device for an automatic transmission. Background technique [0002] Conventionally, there are known various automatic transmissions that shift gears according to the engagement switching of a plurality of frictional engagement elements. For example, there is known a dual clutch transmission (DCT: Dual Clutch Transmission), which has: a first clutch (friction engagement element) disposed between the engine and an odd-stage gear train; The second clutch (frictional engagement element), and transmits the driving force from the engine to the output side via the first clutch or the second clutch. In addition, there is known an automatic transmission (AT: Automatic Transmission), which has: a clutch (friction engagement element) that stops relative rotation between elements constituting a planetary gear; and a brake (friction engagement element) that stops rotation of the element. element), and transmits the driving force...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/48
CPCF16H59/48F16H61/02
Inventor 下泽智启高野谅
Owner ISUZU MOTORS LTD