Electromechanical park brake strategy for transmission park pawl engagement
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United States of America Patent
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Aug 9, 2022
Grant Date -
Dec 17, 2020
app pub date -
Jun 11, 2019
filing date -
Jun 11, 2019
priority date (Note) -
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Abstract
Park control systems and methods operate such that, in response to a request to engage or disengage a park pawl of a vehicle park pawl system, a controller commands a hydraulic brake system to maintain a hydraulic brake pressure therein generated in response to depression of a brake pedal by a driver of the vehicle, when vehicle movement is detected after maintaining the hydraulic brake pressure, commands a vacuum-independent electric brake booster to generate and provide additional hydraulic brake pressure to the hydraulic brake system, commands the park pawl system to engage or disengage the park pawl to/from a transmission output shaft, and after the park pawl is engaged or disengaged to/from the transmission output shaft, commands the hydraulic brake system to release its hydraulic pressure at a defined rate.
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