CVT ratio control with respect to the actual engine torque of the prime mover
AssigneeTransmission Cvtcorp Inc.
InventorsJonathan Guerin, Jean-Francois Dionne
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Abstract
A drivetrain control and a method for controlling a drivetrain where the actual engine torque of the prime mover is taken into account are described herein. Illustrative embodiments include control systems and methods where the ratio set point of the CVT and/or the rate of the CVT ratio change are modified according to the actual engine torque of the prime mover.
Claims28
A method for controlling the ratio set point of a Continuously Variable Transmission (CVT) having an input connected to a prime mover and an output;
- the method comprising:
- obtaining an actual RPM (Revolution Per Minute) value of the prime mover;
- obtaining an actual engine torque value of the prime mover;
- calculating the CVT ratio set point as a function of both the actual RPM value and the actual engine torque value;
- and
- controlling the CVT to reach the calculated CVT ratio set point.
A drivetrain including a prime mover provided with an output shaft, a CVT and a controller connected to the prime mover and to the CVT;
- the CVT including an input shaft connected to the output shaft of the prime mover and an output shaft connected to wheels of a vehicle;
- the controller being so configured as to receive RPM data and actual engine torque data from the prime mover;
- the controller being so configured as to calculate a CVT ratio set point using the received RPM data and actual engine torque data and to control the CVT so that the calculated CVT ratio set point is reached.
Dependencies are inferred from the claim text.