ELECTRIC OPERATED PARKING BRAKE SYSTEM FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide an electric operated parking brake system with a load sensor having a main spring and a sub spring for accurately controlling target pulling force by detecting a point of change from main spring + sub spring property into sub spring property while cancelling a parking brake, and by correcting a zero position of the main spring.

SOLUTION: Output voltage Vs of a hole IC 27 corresponding to the point of change from main spring + sub spring property into the sub spring property is corrected to be zero point voltage Vs0 of the main spring 24. A voltage value ΔV for the target pulling force of a cable 3 corresponding to spring deflection is added to the zero point voltage Vs0 so as to be a voltage value Vtc for the target pulling force.

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