In accordance with some embodiments, the present disclosure provides A brake system for braking a vehicle using one or both of a main braking system and a redundancy braking system, the brake system comprising: a brake demand detecting unit configured to detect a driver's brake demand; an electronic control unit comprising: a pressure controller configured to control a pressure inside a master cylinder in response to a value detected by the brake demand detecting unit, wherein the internal pressure of the master cylinder is controlled by generating an electrical signal for a first demand current; a motor position controller configured to control a position of a motor by generating an electrical signal for a second demand current; and a current controller configured to control the current of the motor in response to an electrical signal received from one of the motor position controller and the pressure controller; a position detecting unit configured to detect a position of a rotor of the motor; and a pressure detecting unit configured to sense the internal pressure of the master cylinder.

A electric brake system includes a main device that provides a first hydraulic pressure to a plurality of wheel cylinders respectively installed on a plurality of wheels, based on a position of a brake pedal: and art auxiliary device that provides a second hydraulic pressure to first and second wheel cylinders respectively installed on first and second wheels among the plurality of wheels based on the position of the brake pedal in a state in which the main device does not generate the first hydraulic pressure. The auxiliary device receives power from a power network different from that of the main device, and the auxiliary device controls at least one of first and second parking brakes respectively installed on third and fourth wheels among the plurality of wheels. In such an electric brake system, when the main device fails or is out of control, the auxiliary device may auxiliary generate the hydraulic pressure required for braking and may generate braking force using the parking brake.

Various technologies for reducing or increasing a speed of a vehicle by rotating its handlebar.

A vehicle brake system, including: a first-braking-force control mechanism configured to control a first braking force, a second-braking-force control mechanism configured to control a second braking force, an abnormal-state detecting device configured to detect whether the first-braking-force control mechanism is in an abnormal state, a pseudo-abnormal-state detecting device configured to detect whether the first-braking-force control mechanism is in a pseudo abnormal state in which the first-braking-force control mechanism is suspected to be in the abnormal state, and a controller including a pseudo abnormal state controller configured to control the second-braking-force control mechanism in an operating state of the first-braking-force control mechanism so as to control the second braking force when the pseudo-abnormal-state detecting device detects that the first-braking-force control mechanism is in the pseudo abnormal state.

An object of the invention is to provide a motor control device capable of realizing a redundancy while suppressing an increase in the number of parts and the number of connection signal lines.

The invention includes angle sensors 102 and 103 for detecting a rotation angle of a motor, MPU 107 for controlling the motor based on a stroke sensor 117 and receiving the detected value of the angle sensor 102, MPU 108 for controlling the motor based on the stroke sensor 117 and receiving the detected value of the angle sensor 103, and communication units 115 and 116 for transmitting and receiving signals between the MPUs 107 and 108. The MPU 107 includes an angle sensor failure detecting unit 114 for detecting a failure of the angle sensors 102 and 103, according to the detected value of the angle sensor 102, the detected value of the angle sensor 103 received through the communication unit 115, and a control angle of the motor created in response to the stroke sensor 117.

A vehicle includes a powertrain having a powerplant and a transmission. The transmission has an input shaft operably coupled to the powerplant and an output shaft operably coupled to driven wheels. A vehicle controller is programmed to, in response to a brake pedal being applied, a speed of the output shaft being less than a threshold speed, and a position of an accelerator pedal being less than a threshold position, automatically engage friction brakes regardless of road grade and continue engagement of the friction brakes despite subsequent release of the brake pedal such that the friction brakes are engaged to hold the vehicle stationary independent of the road grade. The controller is further programmed to release the friction brakes in response to a position of the accelerator pedal being greater than a second threshold position.

According to at least one aspect, the present disclosure provides a method of controlling an electro-hydraulic brake including an electronic brake-force distribution (EBD) control function, the method comprising: an emergency braking determination operation of determining whether emergency braking is required for a vehicle; a motor control operation of controlling a current flowing in a motor connected to a main master cylinder to increase hydraulic pressure supplied to wheel brakes when it is determined that the emergency braking is required; a rear wheel inlet valve closing operation of closing an inlet valve connected to a rear wheel brake for a predetermined time so that a pressure of the rear wheel brake is not increased earlier than a pressure of a front wheel brake; a closed time period calculation operation of calculating a time during which the inlet valve is maintained in a closed state; and a rear wheel inlet valve opening operation of determining whether a time during which the inlet valve is closed exceeds a closed time period (t), maintaining the inlet valve in the closed state until the time reaches the closed time period (t), and opening the inlet valve when the time exceeds the closed time period (t).

The present disclosure relates to an electronic brake system and an operation method thereof. The electronic brake system includes a reservoir in which a fluid is stored, a hydraulic pressure supply device configured to generate a hydraulic pressure by operating a hydraulic piston in response to a signal from a pedal displacement sensor detecting a displacement of a brake pedal, a hydraulic control unit including a first hydraulic unit configured to control the hydraulic pressure to be transferred from the hydraulic pressure supply device to a first hydraulic circuit including two wheel cylinders, and a second hydraulic unit configured to control the hydraulic pressure to be transferred from the hydraulic pressure supply device to a second hydraulic circuit including other two wheel cylinders.

A vehicle brake system including: a pressurizing motor that is connected to a brake pedal and configured to increase a braking force that is generated; and a processor. The processor is configured with a program to perform operations including: operation as an information acquisition part to obtain information on whether a shift position of an automatic transmission is in a non-driving mode and information on operation on the brake pedal; and operation as a braking force controller to perform, when a predetermined retention condition is met, control of braking force so that a stationary state of a host vehicle is maintained. When the predetermined retention condition is met and the shift position is in the non-driving mode, the braking force controller is configured to perform control to increase the braking force that is generated using the pressurizing motor once the brake pedal is in a non-operated state.

Systems and methods to control the vehicle speed of a vehicle includes a motor and a controller coupled to the motor. The controller is structured to: determine that a speed of a vehicle is at or above a predetermined speed limit; activate a motor speed governor responsive to an input received by the controller, wherein the motor speed governor is structured to control a vehicle speed; and adjust an output torque based on the vehicle speed being at or above the predetermined speed limit.