ELECTRIC BRAKE SYSTEM
First Claim
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 one or more wheels via a plurality of valves disposed in the first and second hydraulic circuits; 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,wherein the hydraulic-pressure control unit includes;
a first switching valve disposed in the first hydraulic passage communicating with the first hydraulic chamber, configured to control hydraulic pressure applied to the caliper brake; and
a second switching valve disposed in the second hydraulic passage communicating with the second hydraulic chamber, configured to control hydraulic pressure applied to the caliper brake.
2 Assignments
0 Petitions
Accused Products
Abstract
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 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.
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Citations
11 Claims
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1. An electric brake system comprising:
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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 one or more wheels via a plurality of valves disposed in the first and second hydraulic circuits; 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, wherein the hydraulic-pressure control unit includes; a first switching valve disposed in the first hydraulic passage communicating with the first hydraulic chamber, configured to control hydraulic pressure applied to the caliper brake; and a second switching valve disposed in the second hydraulic passage communicating with the second hydraulic chamber, configured to control hydraulic pressure applied to the caliper brake. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification