To provide a control system capable of increasing idle speed as requested during the idling-up of an engine that is carried out to promote activation of an emission control catalyst in a driving range.
While there is a request to promote activation of the catalyst, a starting friction element is allowed to slip with a decrease in operating oil pressure (engagement capacity) from t1 at which N-idle rotation control permission requirements (D-range, braked state, accelerator released, stopped state) are met. Thereby a turbine speed Nt rises, and from and after t2 at which Nt reaches a set value, that is, from and after t2 at which the starting friction element enters a standby state (automatic transmission in neutral state) in which, while stroke has ended, the friction element has almost no engagement capacity, the operating oil pressure is held at the value at t2. From t2, the engine speed Ne is increased up to an idle speed for promoting catalyst activation.
TANAKA TOMOHIKO
| JPH0198739A | 1989-04-17 | |||
| JP2004324531A | 2004-11-18 | |||
| JPS6127787A | 1986-02-07 | |||
| JP2005280392A | 2005-10-13 | |||
| JP2004225574A | 2004-08-12 |
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
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