Abstract: The present invention relates to a compound or a pharmacologically acceptable salt thereof having excellent tissue non-specific alkaline phosphatase inhibitory activity. The present invention provides a compound represented by the following formula (I): wherein X1 represents a nitrogen atom or CR9, R1 represents a hydrogen atom, a C1-C6 alkyl group, or a C1-C6 alkoxy group, R2 represents a halogen atom, R3 represents a hydrogen atom or a halogen atom, R4 represents a hydrogen atom or a halogen atom, and R5 represents a C1-C3 alkylsulfonyl group, a substituted C1-C6 alkyl group, a substituted C1-C6 haloalkyl group, a substituted C1-C6 alkoxy group, or a substituted C1-C6 alkylamino group, or a pharmacologically acceptable salt thereof.

Abstract: A vehicle brake fluid pressure control device that restrains brake fluid pressure from decreasing counter to driver's intent during vehicle stop time pressure holding control is disclosed. The vehicle brake fluid pressure control device is capable of exercising vehicle stop time pressure holding control (time t2 to t3) under which brake fluid pressure is held when it is determined that a vehicle has been stopped; if a first condition which includes a condition that an amount of lateral motion of the vehicle (yaw rate Y) has become equal to or greater than a first specified value (Yth1) within a first specified time period (T1) elapsed from a time when determined that the vehicle has been stopped (time t2) is fulfilled (time t3) during the vehicle stop time pressure holding control, the vehicle stop time pressure holding control is canceled even without operation of an operation member for operating the vehicle.

Abstract: A vehicle brake hydraulic pressure control apparatus includes a pressure increasing section, a holding section, and a determination section and wheel speed sensors. The pressure increasing section increases a brake hydraulic pressure by driving a motor. The holding section holds a brake hydraulic pressure. The determination section determines whether or not the motor is malfunctional. The wheel speed sensors detect whether or not a vehicle which is at a halt starts to move. If the wheel speed sensors detect that the vehicle starts to move while the holding section is executing a holding control, the pressure increasing section executes a hydraulic pressure re-increasing control by driving the motor, and the determination section determines whether or not the motor is malfunctional based on a detection result by the wheel speed sensors after the brake hydraulic pressure is started to be increased by the hydraulic pressure re-increasing control.

Abstract: A vehicle brake control system includes a clutch stroke acquiring section, a braking force holding section, a first release determination section, and a release execution section. The clutch stroke acquiring section acquires a clutch stroke. The braking force holding section holds a braking force imparted to a wheel brake of a vehicle being at a halt. The first release determination section includes a peak value holding part and a returned amount calculator. The peak value holding part holds a peak value of the clutch stroke. The returned amount calculator calculates a returned amount by which a clutch is returned from the peak value. The first release determination section determines whether or not the held braking force should be released, based on the calculated returned amount. If the first release determination section determines that the held braking force should be released, the release execution section releases the held braking force.

Abstract: A vehicle brake hydraulic pressure control apparatus includes a pressure increasing section, a holding section, and a determination section and wheel speed sensors. The pressure increasing section increases a brake hydraulic pressure by driving a motor. The holding section holds a brake hydraulic pressure. The determination section determines as to whether or not the motor is malfunctional. The wheel speed sensors detect as to whether or not a vehicle which is at a halt starts to move. If the wheel speed sensors detect that the vehicle starts to move while the holding section is executing a holding control, the pressure increasing section executes a hydraulic pressure re-increasing control by driving the motor, and the determination section determines as to whether or not the motor is malfunctional based on a detection result by the wheel speed sensors after the brake hydraulic pressure is started to be increased by the hydraulic pressure re-increasing control.

Abstract: A vehicle brake control system includes a clutch stroke acquiring section, a braking force holding section, a first release determination section, and a release execution section. The clutch stroke acquiring section acquires a clutch stroke. The braking force holding section holds a braking force imparted to a wheel brake of a vehicle being at a halt. The first release determination section includes a peak value holding part and a returned amount calculator. The peak value holding part holds a peak value of the clutch stroke. The returned amount calculator calculates a returned amount by which a clutch is returned from the peak value. The first release determination section determines whether or not the held braking force should be released, based on the calculated returned amount. If the first release determination section determines that the held braking force should be released, the release execution section releases the held braking force.

Abstract: A controller includes an initial current value calculation unit calculating an initial current value to open a normally open linear solenoid valve when a hydraulic pressure is shifted from a pressure reducing state or a pressure holding state to a pressure increasing state, a valve opening amount increasing unit reducing the energization amount from the initial current value so that a valve opening amount of the normally open linear solenoid valve increases, an offsetting necessity determination unit determining based on a predetermined condition whether or not the energization amount needs to be offset to an increase side when the valve opening amount increasing unit reduces the energization amount, and an energization amount offsetting unit offsetting at least once the energization amount to an increase side only for a predetermined time period when it is determined that such offsetting is necessary.

Abstract: A controller 20 includes an initial current value calculation unit 22 calculating an initial current value to open a normally open linear solenoid valve when a hydraulic pressure is shifted from a pressure reducing state or a pressure holding state to a pressure increasing state, a valve opening amount increasing unit 23 reducing the energization amount from the initial current value so that a valve opening amount of the normally open linear solenoid valve increases, an offsetting necessity determination unit 24 determining based on a predetermined condition whether or not the energization amount needs to be offset to an increase side when the valve opening amount increasing unit 23 reduces the energization amount, and an energization amount offsetting unit 25 offsetting at least once the energization amount to an increase side only for a predetermined time period when it is determined that such offsetting is necessary.

Abstract: A brake pressure controller for a vehicle is provided which can reliably restrain the difference between the left and right brake pressures from becoming excessively large. A controller 52 of a vehicle brake pressure controller includes an allowable differential pressure setting device 52A for setting an allowable differential pressure between the left and right wheels based on parameters indicating a motion state of a vehicle, a target control pressure setting device 52B for setting a value obtained by summing up the allowable differential pressure set by the allowable differential pressure setting device 52A and a lower-friction-side brake pressure as a target control pressure of a higher-friction-side brake pressure, and a higher-friction-side brake pressure control device 52E for adjusting the higher-friction-side brake pressure to the target control pressure.