Control apparatus and control method of an automatic transmission

一种自动变速器、控制装置的技术，应用在传动装置控制、带有齿的元件、皮带/链条/齿轮等方向，能够解决发动机转速超过发动机最大允许转速等问题，达到防止互锁的效果

Inactive Publication Date: 2007-01-17
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The result is that, depending on the driving conditions of the vehicle, that is, depending on the vehicle speed, for example, if a downshift is made to a specific gear to be established, which downshift is included as a prerequisite for the specific gear to be established will result in mutual If the engagement of the engagement device occurs with the lock, there is a possibility that the engine speed may exceed the maximum allowable speed of the engine

Method used

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  • Control apparatus and control method of an automatic transmission
  • Control apparatus and control method of an automatic transmission
  • Control apparatus and control method of an automatic transmission

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Embodiment Construction

[0031] In the following description and drawings, the invention will be explained in more detail with reference to exemplary embodiments. figure 1 It is a schematic diagram showing the structure of a vehicle automatic transmission 10 to which the present invention is applied. figure 2is a clutch and brake engagement table showing various combinations of engagement and disengagement of engagement devices (engagement members) for realizing a plurality of gear positions in the automatic transmission 10 . The automatic transmission 10 includes a first shifting portion 14 and a second shifting portion 20 coaxially aligned in a transmission (hereinafter simply referred to as "case") 26, which is a non-rotating component mounted on a vehicle body. The first transmission portion 14 mainly includes a first planetary gear set 12 of a double pinion type, and the second transmission portion 20 mainly includes a second planetary gear set 16 of a single pinion type and a third planetary ge...

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Abstract

A control apparatus and control method of an automatic transmission that establishes a plurality of speeds of different speed ratios by selectively engaging and / or releasing a plurality of engagement devices, detects abnormal engagement of at least one of the engagement devices which causes tie-up to occur in the automatic transmission; establishes a predetermined specific speed set in advance in order to prevent tie-up from occurring in the automatic transmission, when abnormal engagement of the at least one of the engagement devices is detected; and places the automatic transmission in a neutral state when an engine speed will exceed a predetermined allowable speed if the predetermined specific speed is established.

Description

technical field [0001] The invention relates to a control device and a control method of a vehicle automatic transmission. More specifically, the present invention relates to the control of an automatic transmission when an interlock occurs in the automatic transmission. Background technique [0002] Vehicles provided with an automatic transmission in which gear changes are performed by selectively engaging a plurality of engagement devices are known. For example, a vehicle described in Japanese Patent Application Publication No. JP-A-2000-65203 is such a vehicle. Japanese Patent Application Publication No. JP-A-2000-65203 discloses a control device of an automatic transmission that prevents interlock (ie, double lock-up) from occurring in the automatic transmission. More specifically, an interlock may occur in the automatic transmission 10 if an engagement device cannot be released due to, for example, a problem with a shift control valve that controls the engagement oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/12F16H59/42F16H59/68F16H61/68F16H61/684F16H61/686
CPCF16H2061/168F16H2061/1232F16H61/686F16H61/12F16H2061/1204
Inventor 野崎和俊本多敦安倍晶治太田博文
Owner TOYOTA JIDOSHA KK
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