Abuse mode torque limiting control method for a ball-type continuously variable transmission
First Claim
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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Accused Products
Abstract
Provided herein is a control system for a multiple-mode continuously variable transmission having a ball planetary variator operably coupled to multiple-mode gearing. The control system has a transmission control module configured to receive a plurality of electronic input signals, and to determine a mode of operation from a plurality of control ranges based at least in part on the plurality of electronic input signals. The control system includes an engine torque limit sub-module adapted to command an engine torque limit based at least in part on the operating conditions of the continuously variable transmission.
249 Citations
9 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification