Abstract: In an anti-skid control system for a motor vehicle, brake fluid pressure reduction-control mode and brake fluid pressure buildup-control mode occurs cyclically; in the reduction-control mode, reduction of the brake fluid pressure is started on the basis of detection of an abrupt drop in wheel speed which occurs when the wheel is braked; and in buildup-control mode, a valve is repetitively opened and closed so that brake fluid pressure buildup and holding operations are performed alternatley and repetitively, whereby the brake fluid pressure is caused to build up gradually.

Abstract: A roll machine for straightening a brake shoe comprising a main roller and a dependent roll. The main roll has a groove into which the web of the brake shoe is fit and flanges slightly shorter than the thickness of the brake shoe film. The freely rotating dependent roll is hydraulically pressed against the turning main roll and brake shoe. A replaceable block is disposed between the hydraulic piston rod and the support of the dependent roll and a roller pin perpendicular to axis of the two rolls is placed in corresponding grooves of the block and dependent roll support.

Abstract: The piston boot is first set at the middle portion of a cylinder jig having a small diameter upper step portion and a large diameter lower step portion with the middle portion position therebetween and having radial air blow off vents. The upper step portion is then inserted into an inner circumferential face of a piston while simultaneously advancing the lower step portion toward an end face of the piston from which the inner circumferential face extends and blowing air from the blow off vents, as a result of which the piston boot is radially expanded and fitted on an outer circumference of the piston adjacent the end face. A cup form jig slidably fitted around the lower step portion is then advanced toward the piston boot and further advances the piston boot until the piston boot is fitted into a piston boot fitting portion of the piston.

Abstract: A brake system with a hydraulic booster type braking hydraulic pressure generator includes a hydraulic pressure control device for controlling pressure in a first brake channel of a hydraulic pressure source, the control depends on a force exerted on a brake pedal. A hydraulic pressure generating device generates the hydraulic pressure of a second brake channel proportional to the hydraulic pressure in the first brake channel; and a fail-safe fluid chamber is capable of generating fail-safe hydraulic pressure in response to the motion of a piston depending on the force exerted on the brake pedal.

Abstract: A disk brake arrangement for a motor vehicle includes a metal backing plate shaped so as to have at each end thereof, a recessed portion. The support, rigidly attached to the motor vehicle, includes peripheral wall portions shaped to fit within a corresponding receased portion of the pad assembly. The cooperation of these portions prevents a rotation of the pad assembly during braking.

Abstract: A non-asbestos friction composition capable of manufacturing in dry process is disclosed characterized in that, to a composition used 1 to 10 vol. % of aramid fiber pulp and 10 to 40 vol. % of inorganic fibers and added with binder resin and friction modifier, 1 to 6 vol. % of cork powder is added as a processing aid.

Abstract: A system for controlling motor vehicle driving force comprises means for detecting the rotational speed of each of the driving wheels and a driven wheel, means for controlling brake means for the driving wheels according to the output of the detecting means, first comparing means for comparing the rotational speed of the driving wheels with the rotational speed of the driven wheel, calculating means for determining a slipping ratio corresponding to the ratio of the rotational speed of the driving wheels to the rotational speed of the driven wheel, second comparing means for comparing the output of the calculating means with a predetermined threshold slipping ratio, third comparing means for comparing the rotational speed of the driven wheel with a predetermined reference speed, and switching means for connecting the output of the first comparing means to the control means when the rotational speed of the driven wheel is lower than the predetermined reference speed and connecting the output of the second compa

Abstract: An anti-skid control system for motor vehicles is provided wherein the higher one of the lefthand and righthand rear wheels is selected as a first computed speed; the lower one of the above two wheel speeds is selected as a second computed speed; the lower one of the first computed speed and lefthand front wheel speed is selected as a third computed speed; the lower one of the first computed speed and righthand front wheel speed is selected as a fourth computed speed; and a reference speed is set up on the basis of the first computed speed in such a manner that it is lower than the first computed speed by a predetermined amount and follows the first computed speed with such a speed difference.

Abstract: A disc brake having a rotor, a pair of friction pads which are arranged to be capable of frictionally engaging the revolving faces of the rotor, a caliper which is arranged to straddle a portion of the periphery of the rotor and to incorporate therein a piston-cylinder device which is arranged to cause the pair of friction pads to frictionally engage the revolving faces of the rotor and a support member which carries the caliper in such a way as to have the caliper slidable in the axial direction of the rotor and is arranged to receive a braking torque arising on the friction pads either directly or through the caliper, comprising a fixed support arranged to have the support member carried by and turnable on a pin member which is disposed in parallel with the axis of the rotor and to include anchor parts which engage the support member to limit the turnable degree of the support member on the pin member, and a turning force detector which is disposed on at least one of the anchor parts and is arranged to dete

Abstract: In an anti-lock system for a vehicle having a first valve arranged in a brake fluid pressure transmission line from a master cylinder to each brake device to operate under an anti-lock control signal, a second valve arranged to open for reducing the brake fluid pressure, a pressure fluid return device arranged to bring a brake pressure fluid into an accumulator for returning the pressure fluid to the upstream side of the first valve and a gate valve arranged in between the first valve and the master cylinder, the gate valve is provided with a balance piston which is arranged to receive at one end thereof the pressure fluid brought into the accumulator and to receive the pressure fluid of the brake device at the other end; and a shut-off valve device arranged at an axially intermediate part of the balance piston to close a passage between the master cylinder and the first valve according to the balance piston.

Abstract: A method of preventing the rust-forming and adherence between friction material and opposite friction member by incorporating into the friction material a mixture or reaction product of boric acid and zinc oxide as an additive in an amount of 0.5 to 20 wt. %.

Abstract: A method of casting a fiber-reinforced caliper wherein inorganic fiber is wound up in a direction parallel to the axis of cylinder around a core conforming approximately to the inside shape of the bridge portion of a caliper, the wound-up fiber is cut off in the shape of the bridge, and matrix metal is cast onto the cut-off molding of fiber under high pressure to form the shape of caliper, or the whole shape of caliper is formed by a casting method after the bridge portion is formed by casting under high pressure.

Abstract: A pad is engaged by a rotor by hydraulic pressure whereas another pad is engaged by the rotor on the other side thereof by a pair of pawls of the caliper under reaction. The reaction of the caliper is imparted to the other pad in a plane where a pair of the pawls of the caliper are opposed to the other pad and in a position at the marginal edges of the other pad, thereby minimizing squeal when the brake is applied.

Abstract: An antiskid control system for a vehicle, comprises a gate valve device inserted in a braking hydraulic pressure transmission line disposed between a master cylinder device and a braking device and is provided with a valve mechanism receives a pressure fluid from a pressure accumulator and is arranged to close the braking hydraulic pressure transmission line and to initiate communication with the braking device through a branch line; an electromagnetic valve device including a first solenoid valve which is arranged to normally close a transmission pressure fluid supply line provided for supplying the pressure fluid from the accumulator to the gate valve device and to open the transmission pressure fluid supply line when the pressure of the braking device must be lowered and a second solenoid valve which is arranged to normally open a hydraulic pressure release line to release hydraulic pressure from the pressure fluid input chamber of the gate valve device to a reservoir and to close the release line when the

Abstract: In a high frequency induction heating device for a brake shoe lining, a high frequency induction heating coil is arranged to extend zigzag in a curved shape along the inner circumferential surface of the rim of a brake shoe body from one end to the other thereof and is opposed to the inner circumferential surface of the rim; at least three carrying rods are arranged to have their one ends discretely connected to two ends of each of the curved parts and to the middle of the length of the curved part of the coil on their one sides respectively while the other ends of the carrying rods are connected to a fixed supporting member; and the curvature of the curved part of the coil is variable by adjusting the lengths of the carrying rods.

Abstract: In a method for antiskid control of a vehicle, the operating condition of a two-channel type antiskid control device is arranged to be shiftable according to the road surface condition, in such a manner that, in the case of a so-called split road surface condition, the braking force is maintained as much as possible on wheels which remain sufficiently in contact with the road surface, so that the brake distance can be prevented from lengthening without losing the maneuverability of the vehicle.

Abstract: An automatic stop valve device adapted to be mounted in the fluid pressure brake system of a vehicle and having a valve mechanism capable of being shifted between an open and a closed state and operative by closing to maintain fluid pressure in the system to hold the brakes in an applied condition. An electromagnetic mechanism having a coil and an armature actuated by the coil is capable of shifting the valve mechanism to its closed state. The electromagnetic mechanism is arranged to be energized to hold the brakes in the applied condition when a moving vehicle is brought to a stop, to maintain the valve mechanism closed while the vehicle remains stopped to hold the brakes in the applied condition and to open the valve mechanism when the operation of the vehicle resumes to release the brakes.

Abstract: In a vehicle having a brake fluid pressure controller arranged to control brake fluid pressure on following and driving wheels, one independently of the other, a brake fluid pressure retaining device arranged to retain brake fluid pressure for parking by means of said fluid pressure controller and an engine revolution controller, a method for controlling the start of the vehicle comprising the steps of (a) completely releasing the brake fluid pressure on the following wheel and gradually reducing the driving wheel brake fluid pressure in response to a vehicle starting operation; (b) holding the driving wheel brake fluid pressure at a value which is obtained at a point of time when the rotation of the driving wheel is detected; (c) stopping the acceleration of engine revolution at a point of time when the rotating speed of the driving wheel comes to exceed a predetermined value and then lowering the rotating speed of the driving wheel at least either by increasing the brake fluid pressure on the driving wheel

Abstract: Herein disclosed is an antilock system for use with an air brake system. The antilock system comprises a hydraulic cylinder mechanism which has a piston fitted therein and connected to the actuator rod of the air brake system. Further comprised is an oil pressure system for feeding an oil pressure to the hydraulic cylinder mechanism in response to a control signal detective of the locked state of a wheel or wheels, if any, to turn the brake arm, thereby to release the braking force.

Abstract: A brake system of a semi-metallic friction material and a braking component is characterized in that the friction material contains a metallic fiber and/or a metallic powder, a part or all of which has a lower hardness than that of the braking component.