US 7,507,182 B2
Controller, control method and control system for controlling a motor vehicle gear-type transmission
Tetsuo Matsumura, Hitachinaka (Japan); Yoshiyuki Yoshida, Hitachi (Japan); Kentaro Shishido, Hitachinaka (Japan); and Tatsuya Ochi, Naka (Japan)
Assigned to Hitachi, Ltd., Tokyo (Japan)
Filed on Feb. 14, 2006, as Appl. No. 11/353,020.
Claims priority of application No. 2005-041930 (JP), filed on Feb. 18, 2005.
Prior Publication US 2006/0185459 A1, Aug. 24, 2006
Int. Cl. B60W 10/04 (2006.01)
U.S. Cl. 477—174  [74/329; 74/330; 74/333; 74/335; 74/339; 477/70; 477/166] 19 Claims
OG exemplary drawing
 
1. A controller for a motor vehicle gear-type transmission which comprising:
a friction transmission mechanism which transmits power by adjusting a pressure member that applies a pressure to a friction surface;
an input shaft which rotates by receiving the torque transmitted from the friction transmission mechanism;
an output shaft which outputs torque to a driving shaft of a motor vehicle;
a plurality of gear pairs each rotating between the input shaft and the output shaft;
a plurality of mesh mechanisms each establishing a required change gear position by connecting any one of the plural gear pairs to the input shaft or the output shaft; and
an actuator which adjusts the position or pressure load of the pressure member;
wherein the controller includes a control apparatus that is configured to change, by using at least one parameter indicating a state of the gear-type transmission or of the vehicle, a position at which the pressure member is caused to stand by while the driving shaft is in a stopped state or during changeover of any one of the mesh mechanisms that connects to any one of the gear pairs;
wherein the change is carried out prior to a driver's operation of start or acceleration; and
wherein the stand by is within an open state in which the friction transmission mechanism does not transmit the power.