Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Reexamination Certificate
2007-12-11
2007-12-11
Le, David D. (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
C477S143000, C477S155000, C477S156000, C477S158000, C477S164000, C477S174000, C477S180000, C475S116000, C475S117000, C475S118000, C475S127000
Reexamination Certificate
active
11285088
ABSTRACT:
An automatic transmission controller has an electronic control circuit, an electromagnetic valve, and a pressure control valve. The electronic control circuit generates a control current. The electromagnetic valve regulates a command pressure in accordance with the control current. The pressure control valve has a spool and is formed with a spool hole. The spool reciprocates in the spool hole in accordance with the command pressure to regulate a pressure supplied to a friction element of an automatic transmission. In a standby state, when the friction element is in a disengaged state, the electronic control circuit generates an oscillating current as the control current so that the electromagnetic valve generates a standby command pressure that makes the spool reciprocate in a range in which no pressure is supplied to the friction element.
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patent: 5-296327 (1993-11-01), None
Honda Masashi
Suzuki Fuminori
Takagi Akira
Takahashi Kyohei
Denso Corporation
Le David D.
Nixon & Vanderhye PC
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