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Controller of automatic speed variator

A technology for automatic transmissions, controls, applied in the direction of transmission controls, elements with teeth, belts/chains/gears, etc.

Inactive Publication Date: 2009-09-02
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem cannot be solved by using the control device disclosed in JP-A-5-60225

Method used

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  • Controller of automatic speed variator
  • Controller of automatic speed variator
  • Controller of automatic speed variator

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Experimental program
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Embodiment Construction

[0039] Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same components are assigned the same symbols. Their names and functions are also the same. A detailed description of them will therefore not be repeated.

[0040] refer to figure 1 , a power train of a vehicle including the control device of the present embodiment will be described. The control device of this embodiment passes figure 1 The shown ECU (Electronic Control Unit) 1000 is realized. Hereinafter, the automatic transmission will be described as a belt-type continuously variable transmission, but the present invention is not limited thereto.

[0041] Such as figure 1 As shown, the power train of the vehicle consists of an engine 100, a hydraulic torque converter 200, a forward and reverse switching device 290, a belt type continuously variable transmission (CVT, Continuously Variable Transmission) 300, a differential gear 800, a...

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PUM

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Abstract

The invention provides a control device for an automatic transmission. ECT_ECU executes a program including the following steps: the step of judging that it is in neutral control (the judgment result of S120 is Yes), when the brake switch is still on (the judgment result of S150 is Yes), the speed of the driving pulley When NIN is greater than or equal to the threshold value (YES in S140), it is determined that the vehicle is moving forward during the neutral control, until a predetermined time elapses (YES in S190), and the gap close process is executed. Step (S170), a step (S200) of performing normal recovery processing from neutral control after the mating clearance closing processing.

Description

technical field [0001] The present invention relates to the control of a vehicle automatic transmission, and in particular to a control device for an automatic transmission that performs neutral control. Background technique [0002] In the automatic transmission installed on the vehicle, it includes a stepped automatic transmission composed of a hydraulic coupling such as a hydraulic torque converter and a gear-type transmission mechanism, and two belts whose effective diameter is changed by oil pressure. A continuously variable automatic transmission consisting of pulleys and a metal belt wound around these pulleys. [0003] The stepped automatic transmission is connected to the engine through a fluid coupling such as a torque converter. A stepped automatic transmission is composed of a transmission mechanism (gear type transmission mechanism) having a plurality of power transmission paths, for example, to automatically switch the power transmission path based on the acce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/20F16H59/50
Inventor 儿岛星田村忠司近藤宏纪谷口浩司丰田晋哉
Owner TOYOTA JIDOSHA KK