Simulated stepped gear ratio control method for a ball-type continuously variable transmission
AssigneeDana Corporation
InventorsJeffrey M. DAVID, T. Neil McLEMORE, Gordon McINDOE
Life of this patent
Estimating the term…
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 system also has a ratio shift schedule module configured to store at least one shift schedule map, and configured to determine a desired speed ratio of the variator based at least in part on the mode of operation.
Claims20
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, the computer program comprising a software module configured to manage a plurality of operating conditions of the vehicle;
- a plurality of sensors comprising:
- a vehicle speed sensor configured to sense a vehicle speed;
- an engine throttle position sensor configured to sense an engine throttle position;
- an accelerator pedal position sensor configured to sense an accelerator pedal position;
- an operating mode button configured to sense an operator's request for an operating mode;
- wherein the software module includes a plurality of calibration maps, each calibration map storing values of a target CVP speed ratio based on any one of the vehicle speed, the engine throttle position, the accelerator pedal position, and the operating mode.
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 vehicle driving conditions;
- a plurality of sensors comprising:
- a vehicle speed sensor configured to sense a vehicle speed,
- an accelerator pedal position sensor configured to sense an accelerator pedal position,
- a performance mode switch configured to sense a driver's request for a performance mode,
- wherein the software module includes a plurality of calibration maps, each calibration map storing values of a target CVP speed ratio based at least in part on the vehicle speed, the accelerator pedal position, and the performance mode.
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 vehicle driving conditions;
- a plurality of sensors comprising:
- a vehicle speed sensor configured to sense a vehicle speed,
- an engine throttle position sensor configured to sense an engine throttle position,
- a performance mode switch configured to sense a driver's request for a performance mode,
- wherein the software module includes a plurality of calibration maps, each calibration map storing values of a target CVP speed ratio based on the vehicle speed, the engine throttle position, and the performance mode.
Dependencies are inferred from the claim text.