System and method for controlling kick-back in electric booster type brake system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorJoo Beom Kim
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a system and a method for controlling kick-back in an electric booster type brake system capable of reducing a kick-back phenomenon in which a hitting force is transmitted to a brake pedal due to a difference between a high braking hydraulic pressure already generated in a power piston of a second master cylinder by driving a motor and a low braking hydraulic pressure generated in a first master cylinder when a driver steps on a brake pedal, in a fall back situation in which electric power is not smoothly supplied to the motor due to a low voltage of a battery.
Claims10
A system for controlling kick-back in an electric booster type brake system, comprising:
- a pedal travel sensor sensing a pedal stroke of a brake pedal and transmitting the sensed pedal stroke to a controller;
- a battery controller transmitting current battery voltage to a controller;
- a vehicle speed sensor transmitting the current vehicle speed information to the controller;
- a first pressure sensing sensor sensing a low hydraulic pressure generated in a first master cylinder;
- a second pressure sensing sensor sensing a high hydraulic pressure generated by driving of a power piston of a second master cylinder according to driving of a motor;
- and
- a controller configured to perform a kick-back reduction mode if a battery voltage is equal to or lower than a low-voltage reference value for a threshold time or longer and a current vehicle speed is equal to or lower than a low-speed reference value based on the battery voltage information and the vehicle speed information in a state in which the pedal stroke is sensed.
A method for controlling kick-back in an electric booster type brake system, comprising:
- sensing, by a pedal travel sensor, a pedal stroke of a brake pedal and transmitting the sensed pedal stroke to a controller;
- transmitting current battery voltage information from a battery controller to a controller;
- transmitting current vehicle speed information from a vehicle speed sensor to the controller;
- and
- performing, by the controller, a kick-back reduction mode if a battery voltage is equal to or lower than a low-voltage reference value for a threshold time or longer and a current vehicle speed is equal to or lower than a low-speed reference value based on the battery voltage information and the vehicle speed information in a state in which the pedal stroke is sensed.
Dependencies are inferred from the claim text.