Slip control method and arrangement for a driveline including a continuously variable transmission
AssigneeTransmission Cvtcorp Inc.
InventorsJean-François Dionne, Jean-Robert Desmeules, Jonathan Guérin, Daniel Girard
Life of this patent
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Abstract
A slip control method and arrangement for a driveline including a continuously variable transmission is described herein. The driveline includes a clutch that is so controlled as to slip when a torque higher than the usable torque attempts to pass through. Accordingly, the clutch prevents the prime mover from stalling.
Claims11
A method to control the slippage of a driveline including a prime mover having an output shaft, a continuously variable transmission having an input connected to the output shaft of the prime mover and an output, a clutch having an input connected to the output of the continuously variable transmission and an output;
- the clutch having a controllable slippage level between its input and output, and a load connected to the output of the clutch, the slippage control method including:
- determining the usable torque of the prime mover;
- and controlling the slippage level of the clutch so as to allow the usable torque to pass therethrough and to cause the clutch to slip should a torque between the input and output of the clutch be greater than the usable torque.
A driveline including:
- a prime mover having an output shaft;
- a prime mover speed sensor measuring the rotational speed of the output shaft;
- a CVT having an input associated with the output shaft of the prime mover and an output;
- a clutch having an input associated with the output of the CVT and an output;
- a clutch slip controller controlling the level of torque allowed to pass through the clutch before slippage occurs therein;
- and
- a main controller associated with the prime mover speed sensor and with the clutch slip controller;
- the main controller being so configured as to determine a usable torque of the prime mover and to set the clutch slip controller so that the clutch slips when a torque higher than the usable torque attempts to pass through the clutch.
Dependencies are inferred from the claim text.