Emergency braking system and method using electronic parking brake
AssigneeHl Mando Corporation
InventorJaehyun Park
Life of this patent
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Abstract
Disclosed herein is an emergency braking system using an electronic parking brake according to the present disclosure, in which the emergency braking system is configured to provide an emergency braking using an electronic parking brake (EPB) in case of total or partial failure of a main braking system, and includes: an EPB actuator configured to apply an emergency braking force to a wheel; a slip detection unit configured to detect a wheel slip on the wheel equipped with the EPB actuator; an EPB control unit configured to determine a road surface condition by calculating a slip ratio through slip information transmitted from the slip detection unit, and to control an operation of the EPB actuator based on the road surface condition.
Claims16
An emergency braking system configured to provide an emergency braking using an electronic parking brake (EPB) in case of total or partial failure of a main braking system, the emergency braking system comprising:
- an EPB actuator configured to apply an emergency braking force to wheels;
- a slip detection unit configured to detect a wheel slip on the wheels equipped with the EPB actuator;
- and
- an EPB control unit configured to constantly determine a road surface condition by calculating a slip ratio through slip information transmitted from the slip detection unit, and to control an operation of the EPB actuator based on the road surface condition,
- wherein an initial target braking force is set to a maximum braking force value of braking force values transmitted to the wheels from the main braking system prior to the emergency braking.
An emergency braking method using an electronic parking brake comprising:
- (a) transmitting failure information on a main braking system to an EPB control unit;
- (b) performing an emergency braking through an EPB actuator under a control of the EPB control unit;
- (c) determining a road surface condition by detecting a slip of a wheel equipped with the EPB actuator during the emergency braking and calculating a slip ratio;
- and
- (d) releasing or reducing the braking force applied to the wheels from the EPB actuator when the slip ratio reaches a limit value in step (c),
- wherein a target braking force at beginning of the emergency braking is set to a maximum braking force value among braking force values applied to the wheels during a normal operation of the main braking system prior to the emergency braking.
Dependencies are inferred from the claim text.