Abstract: An in-vehicle controlling apparatus, comprising an evaluation unit configured to evaluate a sense-of-security level a passenger may feel with respect to an object present in a traveling direction of a self-vehicle, and a signal generation unit configured to generate a predetermined signal based on the sense-of-security level, wherein the evaluation unit evaluates the sense-of-security level based on a time headway and a temporal variation component of the time headway.

Abstract: A vehicle braking system includes: a master cylinder; a slave cylinder communicated with the master cylinder; a vehicle behavior stabilizer communicated with the slave cylinder; first and second master cut valves, each being a normally closed valve for opening and closing a fluid flow path between the master cylinder and the slave cylinder, for making hydraulic pressures in the slave cylinder and the vehicle behavior stabilizer work in a valve closing direction; a pressure sensor for detecting the hydraulic pressure in the vehicle behavior stabilizer; and a piston controller for advancing first and second slave pistons in the slave cylinder when the hydraulic pressure on the vehicle behavior stabilizer side, detected by the pressure sensor, exceeds a predetermined value, and returning the pistons at a predetermined timing.

Abstract: 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.

Abstract: An in-vehicle controlling apparatus, comprising an evaluation unit configured to evaluate a sense-of-security level a passenger may feel with respect to an object present in a traveling direction of a self-vehicle, and a signal generation unit configured to generate a predetermined signal based on the sense-of-security level, wherein the evaluation unit evaluates the sense-of-security level based on a time headway and a temporal variation component of the time headway.

Abstract: A vehicle braking system includes: a master cylinder; a slave cylinder communicated with the master cylinder; a vehicle behavior stabilizer communicated with the slave cylinder; first and second master cut valves, each being a normally closed valve for opening and closing a fluid flow path between the master cylinder and the slave cylinder, for making hydraulic pressures in the slave cylinder and the vehicle behavior stabilizer work in a valve closing direction; a pressure sensor for detecting the hydraulic pressure in the vehicle behavior stabilizer; and a piston controller for advancing first and second slave pistons in the slave cylinder when the hydraulic pressure on the vehicle behavior stabilizer side, detected by the pressure sensor, exceeds a predetermined value, and returning the pistons at a predetermined timing.

Abstract: An electric brake device includes: a motor cylinder device that generates a hydraulic pressure in accordance with a brake operation of a driver with an electric motor; a rotational angle sensor that detects a rotor rotational angle ? of the electric motor; and a motor control section that controls an output torque of the electric motor corresponding to the rotor rotational angle ? and controls the electric motor by advancing a detection value of the rotational angle sensor. The current phase setup section sets a current phase to an advanced side as an electrical advance control. The current phase setup section inhibits the advancing the detection value when the electric motor performs reversed rotation, or sets the current phase to a retarded side.

Abstract: There is provided a brake system for vehicles, the brake system including: a slave cylinder S/C to generate a hydraulic pressure by an electric motor according to a braking operation by a driver; and a controller to decrease an operation amount of the slave cylinder S/C when an operation amount of the electric motor is maintained, then increase an operation amount of the slave cylinder S/C when a change occurs in an operation amount of the electric motor subsequently. The controller determines whether or not the phase currents Iu, Iv, Iw of the electric motor are in two-phase continuously energized state and the state remains for a certain time or longer. When the determination conditions are satisfied, the controller performs commutation control to generate commutation in the electric motor by reducing a target hydraulic pressure of the slave cylinder S/C.

Abstract: The vehicle braking device includes a hydraulic pressure generating device generating a primary hydraulic pressure corresponding to the braking operation by a driver, a motor cylinder device operating to cause the secondary hydraulic pressure generated by operation of the electric motor to track the target hydraulic pressure based on the control operation quantity, a brake pedal sensor detecting the braking operation quantity, a primary hydraulic pressure sensor, an ECU performing switching control in accordance with whether the braking operation quantity detected by the brake pedal sensor reaches a predetermined threshold value, between operating the motor cylinder device on the basis of the braking operation quantity and operating the motor cylinder device on the basis of a correlation value of the braking operation force detected by the motor cylinder device 16 or the correlation value and the braking operation quantity.

Abstract: Provided is a brake system for a vehicle including an input side hydraulic system, an output side hydraulic system, a first and a second shutoff valves to shut off flowing of the brake fluid between the input side hydraulic system and the output side hydraulic system when closed, a first and a second out-valves through which the brake fluid flows into a reservoir unit when opened, and a control unit to control a motor cylinder device of the output side hydraulic system to generate the brake fluid pressure according to the operational amount of a brake pedal. The control unit opens one or both of the first and the second shutoff valves and the first and the second out-valves when output characteristic of the brake fluid pressure generated by the motor cylinder device shifts from basic characteristic.

Abstract: A vehicle brake system includes a slave cylinder configured to drive an electric motor and generate a brake fluid pressure by moving pistons with a ball screw shaft; normally open type master cut valves that communicate/shut off between the slave cylinder and a master cylinder; and a control unit that controls the electric motor to close the master cut valves and limit a displacement of the ball screw shaft on the basis of a reference position during operation of a VSA device.

Abstract: The object of the present invention is to provide a vehicle brake system capable of appropriately setting an upper limit value of hydraulic pressure of a by-wire brake during stopping of a vehicle in accordance with conditions. When the vehicle is stopped, a maximum allowable drive voltage calculation unit sets a maximum allowable drive voltage to V2, and sets a brake pressure generated by a motor to P2. When the vehicle is stopped, if a duration time of stopping of the vehicle or a duration time of generation of the brake pressure exceeds a reference value, the maximum allowable drive voltage calculation unit sets the maximum allowable drive voltage to V3, and sets the brake pressure generated by the motor to P3 which is lower than P2.

Abstract: In a brake-by-wire brake system which includes a motor actuated cylinder configured to produce a brake fluid pressure according to an operating stroke thereof and an electric motor for actuating the motor actuated cylinder, the control mode is normally based on a fluid pressure control, but is switched to a stroke control when the brake pedal is released for the purpose of quickly reducing the operating stroke of the motor actuated cylinder to an initial value. To avoid a sudden increase in the noises of the electric motor at the time of switching from the fluid pressure control to the stroke control, a limit circuit limits electric current supplied to the electric motor when the control mode is switched from the fluid pressure control to the stroke control.

Abstract: Provided is a brake system for a vehicle including an input side hydraulic system, an output side hydraulic system, a first and a second shutoff valves to shut off flowing of the brake fluid between the input side hydraulic system and the output side hydraulic system when closed, a first and a second out-valves through which the brake fluid flows into a reservoir unit when opened, and a control unit to control a motor cylinder device of the output side hydraulic system to generate the brake fluid pressure according to the operational amount of a brake pedal. The control unit opens one or both of the first and the second shutoff valves and the first and the second out-valves when output characteristic of the brake fluid pressure generated by the motor cylinder device shifts from basic characteristic.

Abstract: The vehicle braking device includes a hydraulic pressure generating device generating a primary hydraulic pressure corresponding to the braking operation by a driver, a motor cylinder device operating to cause the secondary hydraulic pressure generated by operation of the electric motor to track the target hydraulic pressure based on the control operation quantity, a brake pedal sensor detecting the braking operation quantity, a primary hydraulic pressure sensor, an ECU performing switching control in accordance with whether the braking operation quantity detected by the brake pedal sensor reaches a predetermined threshold value, between operating the motor cylinder device on the basis of the braking operation quantity and operating the motor cylinder device on the basis of a correlation value of the braking operation force detected by the motor cylinder device 16 or the correlation value and the braking operation quantity.

Abstract: The object of the present invention is to provide a vehicle brake system capable of appropriately setting an upper limit value of hydraulic pressure of a by-wire brake during stopping of a vehicle in accordance with conditions. When the vehicle is stopped, a maximum allowable drive voltage calculation unit sets a maximum allowable drive voltage to V2, and sets a brake pressure generated by a motor to P2. When the vehicle is stopped, if a duration time of stopping of the vehicle or a duration time of generation of the brake pressure exceeds a reference value, the maximum allowable drive voltage calculation unit sets the maximum allowable drive voltage to V3, and sets the brake pressure generated by the motor to P3 which is lower than P2.

Abstract: In a brake-by-wire brake system which includes a motor actuated cylinder configured to produce a brake fluid pressure according to an operating stroke thereof and an electric motor for actuating the motor actuated cylinder, the control mode is normally based on a fluid pressure control, but is switched to a stroke control when the brake pedal is released for the purpose of quickly reducing the operating stroke of the motor actuated cylinder to an initial value. To avoid a sudden increase in the noises of the electric motor at the time of switching from the fluid pressure control to the stroke control, a limit circuit limits electric current supplied to the electric motor when the control mode is switched from the fluid pressure control to the stroke control.

Abstract: An electric brake device includes: a motor cylinder device that generates a hydraulic pressure in accordance with a brake operation of a driver with an electric motor; a rotational angle sensor that detects a rotor rotational angle ? of the electric motor; and a motor control section that controls an output torque of the electric motor corresponding to the rotor rotational angle ? and controls the electric motor by advancing a detection value of the rotational angle sensor. The current phase setup section sets a current phase to an advanced side as an electrical advance control. The current phase setup section inhibits the advancing the detection value when the electric motor performs reversed rotation, or sets the current phase to a retarded side.

Abstract: There is provided a brake system for vehicles, the brake system including: a slave cylinder S/C to generate a hydraulic pressure by an electric motor according to a braking operation by a driver; and a controller to decrease an operation amount of the slave cylinder S/C when an operation amount of the electric motor is maintained, then increase an operation amount of the slave cylinder S/C when a change occurs in an operation amount of the electric motor subsequently. The controller determines whether or not the phase currents Iu, Iv, Iw of the electric motor are in two-phase continuously energized state and the state remains for a certain time or longer. When the determination conditions are satisfied, the controller performs commutation control to generate commutation in the electric motor by reducing a target hydraulic pressure of the slave cylinder S/C.

Abstract: A vehicle brake system includes a slave cylinder configured to drive an electric motor and generate a brake fluid pressure by moving pistons with a ball screw shaft; normally open type master cut valves that communicate/shut off between the slave cylinder and a master cylinder; and a control unit that controls the electric motor to close the master cut valves and limit a displacement of the ball screw shaft on the basis of a reference position during operation of a VSA device.