| 摘要 |
An electric brake system includes a reservoir, a master cylinder including first and second hydraulic ports, a simulation device providing reaction force in response to foot force applied to a brake pedal, a hydraulic-pressure supply device, a hydraulic-pressure control unit, and an electronic control unit (ECU). The hydraulic-pressure supply device converts rotational force of a motor into rectilinear motion upon receiving an electric signal from the pedal displacement sensor, and moves a double-acting piston designed to perform reciprocating motion within a hydraulic cylinder. The double-acting piston moves in both directions such that the first hydraulic chamber located at one side or the second hydraulic chamber located at the other side are pressed, resulting in formation of hydraulic pressure. |
| 主权项 |
1. An electric brake system comprising:
a reservoir configured to store oil; a master cylinder having first and second hydraulic ports, connected to the reservoir to receive oil from the reservoir; a simulation device connected not only to a pedal displacement sensor sensing a displacement of a brake pedal, but also to the master cylinder, configured to provide reaction force in response to foot force applied to the brake pedal; a hydraulic-pressure supply device configured to convert rotational force of a motor into rectilinear motion upon receiving an electric signal from the pedal displacement sensor according to operation of the brake pedal, and move a double-acting piston designed to perform reciprocating motion within a hydraulic cylinder, wherein the double-acting piston moves in one direction to generate hydraulic pressure by pressing a first hydraulic chamber provided in one end thereof, and moves in another direction to generate hydraulic pressure by pressing a second hydraulic chamber provided in the other end thereof; a hydraulic-pressure control unit including a first hydraulic circuit connected to the first hydraulic chamber via a first hydraulic passage, and a second hydraulic circuit connected to the second hydraulic chamber via a second hydraulic passage, configured to control flow of hydraulic pressure applied to a caliper brake installed in each wheel via a plurality of valves disposed in the first and second hydraulic circuits; a first backup passage configured to connect the first hydraulic port to the first hydraulic chamber; a second backup passage configured to connect the second hydraulic port to the second hydraulic chamber; a first cut valve disposed in the first backup passage, configured to control flow of hydraulic pressure; a second cut valve disposed in the second backup passage, configured to control flow of hydraulic pressure; and an electronic control unit (ECU) configured to control a motor and one or more valves on the basis of hydraulic pressure information and pedal displacement information. |
