Ratio selection method for a continuously variable transmission

Details Ratio selection method for a continuously variable transmission Ratio selection method for a continuously variable transmission

2006-08-29

2006-08-29

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

C477S110000, C701S056000

Reexamination Certificate

active

07097587

ABSTRACT:
A gear ratio selection method for a transmission in a motor vehicle includes detecting a power request, detecting a vehicle speed of the motor vehicle, and providing an engine speed of the motor vehicle. A first desired engine speed is calculated from a first variogram using the power request and the vehicle speed. A second desired engine speed is calculated from a second variogram using the power request and the vehicle speed. A blend factor is determined from the power request, the vehicle speed, and the engine speed. Finally, a blended desired engine speed is calculated from the first desired engine speed, the second desired engine speed, and the blend factor. The blended desired engine speed is used to determine a gear ratio for the continuously variable transmission.

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