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US 6,295,497 B1Granted
Method and apparatus for adaptively shifting ranges in a continuously variable transmission
AssigneeCaterpillar Inc.
InventorBrian D. Kuras
Life of this patent
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AssigneeCaterpillar Inc.
InventorBrian D. Kuras
Estimating the term…
A transmission includes a transmission input speed sensor which generates transmission input speed signals indicative of an input speed to the transmission and a transmission output speed sensor which generates transmission output speed signals indicative of an output speed of the transmission. The transmission further includes a controller operable to receive the transmission input speed signal and the transmission output speed signal and determine a transmission ratio based on the transmission input speed signal and the transmission output speed signal. The controller is further operable to calculate a rate of change of the transmission ratio and initiate a transmission range shift based on the transmission ratio, the rate, and a shift completion ratio such that the transmission range shift is completed when the transmission is at the predetermined shift completion ratio.
A continuously variable transmission, comprising:
A work machine having a transmission, comprising:
A method for controlling a continuously variable transmission having (i) a transmission input speed sensor, (ii) a transmission output speed sensor, and (iii) a controller, comprising the steps of:
Dependencies are inferred from the claim text.