Patent ID: 8718884

Claim:
A method for compensation of speed lag from changing load conditions in a continuously variable transmission (CVT) vehicle, comprising; detecting and measuring true engine torque resulting from load changes placed on the vehicle engine; calculating a true engine speed droop from the true engine torque, wherein engine droop rate, engine rated rpm, and engine rated torque are known fixed values, the true engine droop calculated as follows: (engine droop at rated rpm)=(engine droop rate)×(engine rated rpm) (true engine droop/true engine torque)=(engine droop at rated rpm/engine rated torque) (true engine droop)=(true engine torque)×(engine droop at rated rpm/engine rated torque) (true engine droop)=(true engine torque)×[(engine droop rate)×(engine rated rpm)]/(engine rated torque); generating a compensated engine speed signal based on the calculated true engine speed droop; and applying the compensated engine speed signal to the engine to produce a true engine speed corresponding to a target engine speed at the load condition corrected for true engine speed droop.