Initializing device of speed change control system for use in co

Details Initializing device of speed change control system for use in co Initializing device of speed change control system for use in co

1995-12-27

1997-04-29

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

F16H 900, F16H 1500, F16H 6132

Patent

active

056243499

ABSTRACT:
A controller (17) obtains a target input rotating speed (N.sub.is) based on a vehicle running speed (VSP) and a throttle valve opening degree (TVO), drives a motor (23) by the use of a corresponding instruction value, and operates a speed change control valve (21) through a link (22). The controller (17) makes the motor (23) rotate to a hardware limit position in a side corresponding to a lower speed ratio side when the vehicle is in a stopping condition, and then makes the motor (23) rotate in the counter direction to return to a position corresponding to the lowest speed change ratio. On this occasion, the instruction value of the motor (23) is initialized to "0" corresponding to the lowest speed change ratio. When the vehicle is in a running condition, an actual speed change ratio is calculated, from which the motor position is inferred. Then, the instruction value of the motor (23) is initialized as a value corresponding to the inferred position thereof. Thus, a switch becomes unless in order to make the motor rotate to the position corresponding to the lowest speed change ratio position, further the initialization is realized not only when the electric power is turned on, so that the times of the initialization can be increased.

REFERENCES:
patent: 4698764 (1987-10-01), Inagaki et al.
patent: 4736655 (1988-04-01), Kumura et al.

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