Automatic speed regulator hydraulic controller and controlling method for abrading connector thereof

A technology for frictional engagement devices and automatic transmissions, which is applied in transmission control, engine control, electrical control, etc., and can solve problems such as fluctuations in the rate of change of turbine speed
CN1490542AInactive Publication Date: 2004-04-21TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2004-04-21
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The hydraulic pressure control mechanism for a change to a higher gear in a motor vehicle automatic transmission system with a series of hydraulic friction clutches has a first system (102) to determine whether the upward gear change command has been started while there is no pressure on the accelerator pedal, a second system (104) to determine whether a factor modifying an automatic transmission input torque has been generated, and a correction command system to correct the engagement pressure of the predetermined hydraulic friction clutch in conformity with the modification factor. The mechanism also has a computer (106) to calculate the gear selection value on the basis of the vehicle's actual speed, and a system to determine a differential value between the rotational speed of the transmission input shaft and synchronised speed.
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Description

technical field

[0001] The present invention relates to a hydraulic control device of a vehicle automatic transmission and a control method of a hydraulic friction engagement device of a vehicle automatic transmission, when performing a predetermined upshift by increasing the engagement pressure of a predetermined hydraulic friction engagement device, by A factor changing the input torque of the transmission that occurs during a power cut upshift (power cut upshift) corrects the engagement pressure to suppress upshift shock (vibration). Background technique

[0002] JP-A-2001-124192 discloses a hydraulic control device for performing scheduled upshifts by increasing the engagement pressure of a predetermined hydraulic friction engagement device in a vehicle automatic transmission by selectively engaging a plurality of hydraulic friction engagement devices. Friction engagement for gear shifting. The hydraulic control device performs the following 6 steps. In a first step, i...

Claims

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