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RECOVERY OF CALIBRATED CENTER STEERING POSITION AFTER LOSS OF BATTERY POWER
RECOVERY OF CALIBRATED CENTER STEERING POSITION AFTER LOSS OF BATTERY POWER
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机译:电池电量丢失后恢复校准后的中心转向位置
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摘要
The steering angle of a vehicle is monitored using position sensors of an electric motor of an electric power assisted steering (EPAS) system. A position of the electric motor corresponding to the straight-ahead, center position of the steering system is stored in non-volatile memory during a steering calibration procedure, such as an end-of-line calibration in a vehicle assembly plant. Following power loss due to a dead battery, a steering angle zeroing procedure performed in a vehicle stability control (VSC) system generates a center position with enough accuracy to be within one electrical cycle of the motor. The pre-stored electric motor position is then used to determine the electrical cycle where the center position was located, and accurate monitoring of steering angle is resumed.
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