A hydraulic brake system for a vehicle, including: a wheel brake device configured to generate a braking force based on a pressure of a working fluid; a first brake system including a high-pressure source device including an accumulator and a first pump device that is driven intermittently such that a pressure of the working fluid in the accumulator is not lower than a set lower limit pressure and not higher than a set upper limit pressure; a second brake system including a second pump device; and a main power source that supplies electricity to the first and second brake systems, wherein the hydraulic brake system includes an auxiliary power source that supplies electricity to the first brake system when a failure occurs in the main power source, and wherein the first pump device is continuously driven when the failure occurs irrespective of the pressure in the accumulator.

A method for controlling a machine during a transition from a service brake state to a parking brake includes receiving, by a control module, a request for activating a parking brake assembly. The method also includes transmitting, by the control module, control signals for activating a set of first brakes associated with a service brake assembly, a set of second brakes associated with the service brake assembly, and a clutch assembly. The method further includes controlling, by the control module, the set of first brakes for deactivating the set of first brakes. The method includes controlling, by the control module, the parking brake assembly for activating the parking brake assembly. The method also includes controlling, by the control module, the set of second brakes for deactivating the set of second brakes. The method further includes controlling, by the control module, the clutch assembly for deactivating the clutch assembly.

A braking control device includes: a control unit that is configured to control front-wheel braking power and rear-wheel braking power based on braking power distribution and requested braking power; a distribution setting unit that is configured to set the braking power distribution; and a slip judgment unit that is configured to judge whether or not the vehicle is in a rear-wheel-led slip state. If it is judged that the vehicle is in the rear-wheel-led slip state when the braking power distribution is first braking power distribution, the distribution setting unit executes a distribution shifting process of shifting the braking power distribution to second braking power distribution within a predetermined period. The second braking power distribution is such distribution that the rear-wheel braking power is reduced relative to that observed when the first braking power distribution is set as the braking power distribution.

A braking control device includes: a control unit that is configured to control front-wheel braking power and rear-wheel braking power based on braking power distribution and requested braking power; a distribution setting unit that is configured to set the braking power distribution; and a slip judgment unit that is configured to judge whether or not the vehicle is in a rear-wheel-led slip state. If it is judged that the vehicle is in the rear-wheel-led slip state when the braking power distribution is first braking power distribution, the distribution setting unit executes a distribution shifting process of shifting the braking power distribution to second braking power distribution within a predetermined period. The second braking power distribution is such distribution that the rear-wheel braking power is reduced relative to that observed when the first braking power distribution is set as the braking power distribution.

A friction material comprising a Fe part; a coating layer formed over a surface of the Fe part; and a friction part formed on a surface of at least a part of the coating layer wherein: the coating layer comprises a first coating layer and a second coating layer in order from Fe part side, the first coating layer is constituted of an alloy containing Cu, Ni and Fe such that Fe content be not less than 10 atom %, the second coating layer is constituted of an alloy containing Cu and Ni, or an alloy containing Cu, Ni and Fe such that Fe content be less than 10 atom %, an average thickness of the first coating layer is not less than 1.0 μm and not more than 6.0 μm; and an average thickness of the second coating layer is not less than 9.5 μm and not more than 24.0 μm.

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).

A method for reducing jolt moments during a deceleration of a vehicle by a braking system, the braking system having at least one electrically actuatable pressure supply device, hydraulic wheel brakes and a valve device. The valve device is designed to apply a pressure provided by the pressure supply device to a selectable subset of the wheel brakes. The method includes: determining a braking requirement, determining a vehicle speed, checking whether the vehicle speed is below a defined threshold value, and if the vehicle speed is below the threshold value, selecting the subset of wheel brakes and applying a pressure provided by the pressure supply device to only the subset of wheel brakes, the pressure being determined according to the selected subset of wheel brakes.

The present disclosure provides a braking method of a vehicle, comprising: a control start determination operation of determining whether traction control system (TCS) control is needed; a required pressure calculation operation of calculating required pressures, which are required for wheel brakes to brake a vehicle, of wheels when it is determined that the TCS control is needed; a control mode determination operation of determining whether the TCS control is performed in a single wheel control mode or multi-wheel control mode; and a hydraulic pressure supply operation of supplying hydraulic pressure to a low-pressure wheel brake through valve control and supplying hydraulic pressure to a high-pressure wheel brake through pressure control in the multi-wheel control mode and supplying hydraulic pressure to any one wheel brake through the valve control in the single wheel control mode in order for the wheel brakes to reach the required pressures.

To suppress a sharp variation in the posture of a vehicle in a control apparatus that is configured to control the posture of the vehicle by adjusting a distribution ratio of a braking force between the front and rear during braking of the vehicle.

The control apparatus includes a distribution setting unit that is configured to change the braking force distribution ratio from a basic braking force ratio during braking of the vehicle so that a posture of the vehicle follows a posture indicated by the target posture value. If the target posture value is varied when the braking force distribution ratio is different from the basic braking force ratio, the distribution setting unit sets the amount of change, by which the braking force distribution ratio is changed per unit time, equal to or smaller than a restriction amount.

To suppress a sharp variation in the posture of a vehicle in a control apparatus that is configured to control the posture of the vehicle by adjusting a distribution ratio of a braking force between the front and rear during braking of the vehicle.

The control apparatus includes a distribution setting unit that is configured to change the braking force distribution ratio from a basic braking force ratio during braking of the vehicle so that a posture of the vehicle follows a posture indicated by the target posture value. If the target posture value is varied when the braking force distribution ratio is different from the basic braking force ratio, the distribution setting unit sets the amount of change, by which the braking force distribution ratio is changed per unit time, equal to or smaller than a restriction amount.