Apparatus and Method for Controlling a Cam
AssigneeVitesco Technologies GmbH
InventorsYoungMo Lee, HaMyeong Song, JaeWon Choi
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Abstract
Various embodiments of the teachings herein include a method for controlling a cam using an ECU (electronic control unit) comprising: learning a holding region in which linearity is not ensured by increasing or decreasing a PWM signal while the cam maintains a holding state; based on the results of the learning, generating a final PWM signal; and transmitting the final PWM signal to an oil control valve. The final PWM signal comprises a sum of a minimum PWM signal for the cam to leave the holding region and a control PWM signal for the cam to reach a desired position.
Claims10
A method for controlling a cam using an ECU (electronic control unit), the method comprising:
- learning a holding region in which linearity is not ensured by increasing or decreasing a PWM signal while the cam maintains a holding state;
- based on the results of the learning, generating a final PWM signal;
- wherein the final PWM signal comprises a sum of a minimum PWM signal for the cam to leave the holding region and a control PWM signal for the cam to reach a desired position;
- and
- transmitting the final PWM signal to an oil control valve.
An apparatus for controlling a cam, the apparatus comprising:
- an electronic control unit (ECU) with a learning unit for learning a holding region in which linearity is not ensured by performing an operation of increasing or decreasing the PWM signal while the cam maintains a holding state;
- and
- a control unit in the ECU which, based on the holding region, generates a final PWM signal;
- wherein the final PWM signal comprises a sum of a minimum PWM signal for the cam to leave the holding region and a control PWM signal for the cam to reach a desired position;
- and
- wherein the ECU transmits the final PWM signal to an oil control valve.
Dependencies are inferred from the claim text.