Control Method For A Ball-Type Continuously Variable Planetary Related Application
OwnerJeffrey M. David, T. Neil McLemore +1inventors
InventorsJeffrey M. David, T. Neil McLemore, Benjamin L. Powell
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Abstract
A control system to control the operating conditions of a Continuous Variable Transmission configured to receive signals and execute commands based at least in part on a driver's torque or load request. The control system includes a ratio controller incorporating binary logarithmic processes applied to a commanded CVP ratio and an actual CVP ratio. The binary logarithmic processes provide linearized signals to a PID controller to thereby provide a commanded CVP ratio to form a commanded CVP shift actuator position.
Claims3
A computer-implemented system for a ball-type planetary variator (CVP) having a plurality of tiltable balls coupled to and supported in a carrier assembly, the computer-implemented system comprising:
- a digital processing device comprising an operating system configured to perform sequences of executable instructions and a memory device;
- a computer program including a sequence of instructions executable by the digital processing device, the computer program comprising a ratio controller configured to control a plurality of operating conditions of the CVP;
- and
- a plurality of sensors configured to monitor the operating conditions of the CVP comprising:
- a CVP ratio command,
- an actual CVP ratio,
- wherein the ratio controller comprises a first logarithmic process applied to the CVP ratio command to form a linearized CVP ratio command and a second logarithmic process applied to the actual CVP ratio to form a linearized actual CVP ratio, and
- wherein the ratio controller commands a change in the carrier assembly position of the CVP based at least in part on the linearized CVP ratio command and the linearized actual CVP ratio.
Dependencies are inferred from the claim text.