	US 7,563,196 B2
	Controller for automatic transmission
Jun Yamada, Nagoya (Japan); and Tetsuji Kozaki, Chita-gun (Japan)
Assigned to DENSO Corporation, Kariya (Japan)
Filed on Apr. 19, 2005, as Appl. No. 11/108,891.
Claims priority of application No. 2004-130644 (JP), filed on Apr. 27, 2004; application No. 2004-130645 (JP), filed on Apr. 27, 2004; and application No. 2004-134516 (JP), filed on Apr. 28, 2004.
Prior Publication US 2005/0245351 A1, Nov. 03, 2005
Int. Cl. B60W 10/04 (2006.01); B60W 10/10 (2006.01)

U.S. Cl. 477—110 [477/144; 477/155]

35 Claims

1. A controller for an automatic transmission wherein oil pressures acting on a plurality of frictional engaging elements are individually controlled by oil pressure to selectively switch the frictional engaging elements between engagement and release to switch from one shift range to another, the controller comprising:

engine output control means for increasing engine output without depending on a driver's accelerator operation when a shift mechanism is down-shifted for deceleration; and

start timing control means for setting a start time of the engine output control at a time when the oil pressure of a frictional engaging element being released during down-shift decreases to a level not higher than a predetermined transfer torque capacity-equivalent oil pressure.