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Abuse mode torque limiting control method for a ball-type continuously variable transmission

  • US 10,030,594 B2
  • Filed: 09/14/2016
  • Issued: 07/24/2018
  • Est. Priority Date: 09/18/2015
  • Status: Active Grant
First Claim
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1. A computer-implemented system for a vehicle having an engine coupled to an infinitely variable transmission having a ball-planetary variator (CVP), the computer-implemented system comprising:

  • a digital processing device comprising an operating system configured to perform executable instructions and a memory device;

    a computer program including instructions executable by the digital processing device, the computer program comprising a software module configured to manage a plurality of operating conditions of the vehicle;

    a plurality of sensors comprising;

    a CVP input speed sensor configured to sense a CVP input speed;

    an accelerator pedal position sensor configured to sense an accelerator pedal position,a CVP output speed sensor configured to sense a CVP output speed, wherein the software module determines a current CVP speed ratio based on the CVP input speed and the CVP output speed; and

    an oil temperature sensor configured to sense an oil temperature;

    wherein the software module is configured to determine a commanded engine torque limit based on the CVP speed ratio, the accelerator pedal position, and the engine oil temperature; and

    wherein the software module is configured to control an engine torque based on the commanded engine torque limit.

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