Parking pawl engagement control with feedback
First Claim
Patent Images
1. A system for parking pawl engagement control of a hybrid vehicle comprising:
- a plurality of wheels;
a planetary gear;
a motor-generator geared to the plurality of wheels through the planetary gear;
a parking pawl for engaging the planetary gear; and
a processor configured to;
determine a target torque value of the motor-generator based on at least one of a target movement value that corresponds to a movement of the hybrid vehicle or a target speed value that corresponds to a speed of the hybrid vehicle, andadjust the target torque value based on feedback data corresponding to a detected condition or a current movement of the hybrid vehicle, wherein the adjustment of the target torque value optimizes engagement of the parking pawl with the planetary gear.
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Abstract
A system and method for improving the consistency of a hybrid vehicle parking pawl engagement control. A hybrid vehicle includes a motor-generator, a planetary gear, a parking pawl, and a processor. The hybrid vehicle uses feedback to more accurately determine that the parking pawl is fully engaged. The parking pawl is applied to the planetary gear. The processor determines a target movement for the hybrid vehicle and commands a torque from the motor-generator to achieve the target movement. The processor determines that the parking pawl has fully engaged and locked the planetary gear.
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Citations
20 Claims
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1. A system for parking pawl engagement control of a hybrid vehicle comprising:
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a plurality of wheels; a planetary gear; a motor-generator geared to the plurality of wheels through the planetary gear; a parking pawl for engaging the planetary gear; and a processor configured to; determine a target torque value of the motor-generator based on at least one of a target movement value that corresponds to a movement of the hybrid vehicle or a target speed value that corresponds to a speed of the hybrid vehicle, and adjust the target torque value based on feedback data corresponding to a detected condition or a current movement of the hybrid vehicle, wherein the adjustment of the target torque value optimizes engagement of the parking pawl with the planetary gear. - View Dependent Claims (2, 3, 4, 5)
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6. A hybrid vehicle comprising:
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a plurality of wheels; a planetary gear; a motor-generator geared to the plurality of wheels through the planetary gear; a grade sensor for detecting a grade of a surface upon which the hybrid vehicle is positioned; a sensor configured to detect feedback data indicating a detected condition of the hybrid vehicle or a current movement of the hybrid vehicle; a brake pedal; a brake pedal sensor configured to detect a position of the brake pedal; a parking pawl configured to engage the planetary gear; and a processor configured to; determine a target torque value based on the detected grade and at least one of a target movement value that corresponds to a movement of the hybrid vehicle or a target speed value that corresponds to a speed of the hybrid vehicle, command a torque to be outputted by the motor-generator based on the target torque value, and adjust the target torque value based on the detected feedback data for optimizing engagement of the parking pawl with the planetary gear, wherein the processor is configured to determine that the planetary gear is locked when the current movement of the hybrid vehicle is equal to or greater than the target movement value. - View Dependent Claims (7, 8, 9, 10)
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11. A method for controlling a parking pawl engagement for a hybrid vehicle comprising:
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applying a parking pawl to a planetary gear connected to a motor-generator and a plurality of wheels; determining at least one of a target movement value for the hybrid vehicle or a target speed value for the hybrid vehicle; determining a target torque value based on at least one of the target movement value or the target speed value; detecting, using at least one sensor, feedback data corresponding to at least one of a detected condition of the hybrid vehicle or a current movement of the hybrid vehicle; adjusting the target torque value based on the feedback data; and outputting a torque by the motor-generator to the plurality of wheels based on the adjusted torque value until the current movement of the hybrid vehicle matches or exceeds the target movement value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification