摘要:
A brake control system includes a plurality of fluid channels communicating from a hydraulic pressure source to a reservoir for controlling brake hydraulic pressures supplied to respective brake calipers by a plurality of hydraulic pressure control valves arranged in the respective fluid channels, wherein valve drive circuits for controlling the hydraulic pressure control valves are provided, two power relays for supplying power are connected to the plurality of valve drive circuits and when all hydraulic pressure control valves arranged in one fluid channel are normally open valves which communicate the hydraulic pressure source to the reservoir when nonenergized, different power relays are used for at least two valve drive circuits in the valve drive circuit corresponding to all the hydraulic pressure control valves to thereby prevent a malfunction of one power relay from causing all brake hydraulic pressures to fall.
摘要:
An ultrasonic probe comprising a coaxial cable 11 capable of transferring an energizing pulse voltage and an echo signal, at least one piezoelectric element 5, an acoustic matching layer 7 disposed on a sound transmitting face side of each piezoelectric element 5 and an acoustic backing layer 8 disposed on its opposite side, the above ultrasonic probe being adapted to transmit and receive an ultrasonic wave, wherein each piezoelectric element 5 has the following distribution of spontaneous polarization according to positions of the piezoelectric element. The spontaneous polarization of the ultrasonic probe of the present invention has differences such that the spontaneous polarization is caused to be strong at a position where the absolute value of Bessel function J.sub.0 (x/a) is large while the spontaneous polarization is weak at a position where the absolute value of J.sub.0 (x/a) is small.
摘要:
A brake control apparatus includes an actuator configured to generate a braking force of road wheel; a first control unit configured to calculate a target braking controlled variable in accordance with an amount of brake manipulation of a driver; and a second control unit including a backup calculation section configured to calculate a backup target braking controlled variable, by receiving the amount of brake manipulation separately from the first control unit. The second control unit selects one of the target braking controlled variable and the backup target braking controlled variable in accordance with operating conditions of the first control unit and the second control unit. The second control unit outputs a drive signal to the actuator so as to bring the braking force of road wheel closer to the selected one of the target braking controlled variable and the backup target braking controlled variable.
摘要:
In circuit abnormality determining apparatus and method applicable to a brake control apparatus, an abnormality determining section determines at least one of an abnormality location of the electric circuit and an abnormality kind of the electric circuit on a basis of monitoring results of a current state in the electric circuit detected by a current detection section, a voltage state of the electric circuit detected by a open circuit detection section, and a power supply voltage.
摘要:
An anti-loosening bolt assembly having a setscrew with an external screw on its outer periphery, a lock bolt having an external screw with the same pitch as the screw of the setscrew, and an axial end which is engaged with an axial base of the setscrew. One of the axial base of the setscrew and axial end of the lock bolt has a conical protrusion part, with the other having a first concave part, with which the protrusion part is engaged. An outer peripheral surface of the protrusion part and an inner peripheral surface of the first concave part are slightly eccentric.
摘要:
A brake control apparatus includes a master cylinder, a wheel cylinder that is provided for a vehicle wheel, a hydraulic actuator that is provided separately from the master cylinder and adjusts a hydraulic pressure of the wheel cylinder, a control unit that controls the hydraulic actuator on the basis of a brake operating amount by a driver. The control unit has a main unit that performs the computation of a target hydraulic pressure of the wheel cylinder and a sub unit that drives the hydraulic actuator based on the target hydraulic pressure computed by the main unit.
摘要:
An anti-loosening nut assembly is composed of an upper nut 3 and a lower nut 2 that engage with each other in an eccentric manner to afford the so-called ‘wedging’ effect of surely inhibiting them from loosening themselves. The upper nut 3 has one or more lateral lugs to be brought into contact with the lower end of a fastening tool such as a spanner. The lug or lugs 3b protrudes or protrude from the outer peripheral portion or portions of the upper nut 3 for the purpose of visual detection of rotation angle of this nut.
摘要:
An exhaust gas purifying catalyst in which catalytic activation particles 3 composed of a catalytic element or its compound are carried on a carrier 1. The catalytic activation particles 3, as carried on the carrier 1 and exposed to the outside of the carrier 1, are coated with the carrier 1 by 20 to 90% of their whole surface area. Also disclosed is a process for producing the exhaust gas purifying catalyst.