A brake system for hydraulically actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a master cylinder fluidly connected to the reservoir and operable to provide a brake signal. A first power transmission unit is in fluid communication with the reservoir, a selected one of the rear wheel brakes, and a first fluid separator corresponding to a selected one of the front wheel brakes. A first electronic control unit is configured to control the first power transmission unit. A second power transmission unit is in fluid communication with the reservoir, the other one of the front wheel brakes, and a second fluid separator corresponding to an other one of the front wheel brakes. A second electronic control unit is configured to control the second power transmission unit.

A purpose is to obtain a brake hydraulic pressure controller and a method for manufacturing a brake hydraulic pressure controller that realize suppression of manufacturing cost and downsizing of the brake hydraulic pressure controller and simplification of a manufacturing process.

The brake hydraulic pressure controller 1 has: a base body 10 formed with a channel of a hydraulic fluid; plural hydraulic pressure regulating valves 3 provided in the channel; and plural drive coils respectively provided in the plural hydraulic pressure regulating valves 3 and driving the hydraulic pressure regulating valves 3. One end section 15B that constitutes one end side of the drive coil 11 is adhered to an adhesive surface section that constitutes a contour of the base body 10 via a first adhesive member 17A.

A brake hydraulic pressure controller includes a base body that is formed with a channel for a hydraulic fluid therein. A first banjo with a first end, to which a brake pipe is connected, is fixed to a first port of the channel by a banjo bolt. A second end of the first banjo, to which the brake pipe is not connected, is inserted in a bottomed hole that is perforated in specified depth on an outer surface of the base body and into which the hydraulic fluid does not flow in an entire region of the specified depth, or extends to the outside of a side of the base body and is locked to an edge on the side of the base body.

According to an aspect of the present disclosure, it provides an electronic brake system including a pedal simulator configured to provide a reaction force according to a pedal force of a brake pedal, an actuator configured to generate a hydraulic pressure using an actuator piston that operates by an electrical signal output corresponding to a displacement of the brake pedal and including a first chamber provided at one side of the actuator piston movably accommodated in an actuator cylinder and connected to one or more wheel cylinders and a second chamber provided at the other side of the actuator piston and connected to one or more wheel cylinders, a first hydraulic circuit including first and second inlet flow channels branched from a first hydraulic flow channel configured to communicate with the first chamber to be connected to two wheel cylinders, respectively a second hydraulic circuit including third and fourth inlet flow channels branched from a second hydraulic flow channel configured to communicate with the second chamber to be connected to two wheel cylinders, respectively, and a reservoir connected to the actuator and the first and second hydraulic circuits and configured to store brake fluid, wherein a hydraulic pressure unit connected from the actuator to the one or more wheel cylinders are hydraulically separated from a pedal force unit connected from the brake pedal to the pedal simulator.

A solenoid comprises first and second coils connected to an electrical power supply circuit. In a first mode of operation the power supply circuit is arranged to provide a current flowing in opposite directions through the respective first and second coils, e.g. to produce a self-heating effect. In a second mode of operation the power supply circuit is arranged to provide a current flowing in the same direction through the respective first and second coils, e.g. to generate a magnetic force. In some embodiments, the power supply circuit includes a bridge rectifier or full wave rectifier connected to a bi-directional current driver.