105results about How to "Reduce brake pressure" patented technology

A pneumatic vehicle tire includes a carcass, a bead with a bead core arranged in the bead, and a first sensor located within the bead. The first sensor delivers signals which are correlated to frictional forces transmitted by the pneumatic vehicle tire during operation. This sensor has a first end and a second end, wherein the first end includes a heel attached to the bead core and the second end extends radially outward from the bead core within the tire. A plurality of such sensors can be included in each tire, some for measuring longitudinal forces in a circumferential direction of the tire and others for measuring lateral forces in an axial direction of the tire.

A pressure reduction start distance is obtained (S9) based upon a deceleration after an operation of an automatic brake. When an obstacle-to-vehicle distance between a vehicle and an obstacle ahead becomes a distance obtained by adding the pressure reduction start distance to a target stopping distance to the obstacle ahead, the reduction of the brake pressure is started (S11) to suppress a pitching vibration generated before and after the vehicle stops. When the obstacle-to-vehicle distance becomes a stopping brake start distance that is just before the target stopping distance, the brake pressure is increased (S13) so as to allow the vehicle to stop.

In a method for recovering energy in a braking process of a hybrid vehicle which has an internal combustion engine and an electric drive, as well as a hydraulic or pneumatic braking system, the exploitation of the electric drive is able to be optimized if the braking system includes at least one pressure reduction valve, using which the braking pressure exerted by the driver is able to be reduced as a function of the deceleration proportion of the electric machine.

The invention relates to a system for reinforcing the braking of an auxiliary wheel of an automobile. A vehicle bridge of the bottom of the automobile is provided with a set or a plurality of sets of tires capable of moving up and down. When the automobile has emergency brake, a driver steps on a foot brake and simultaneously presses a startup switch of the system; an auxiliary tire set is instantly ejected out and is contacted with the ground, thereby having braking force on the automobile; therefore, besides the tire of the automobile in normal driving has braking force, the braking force of the auxiliary tire on the automobile is increased so as to increase resultant force of automobile braking, thereby shortening the inertia forward distance after the automobile is braked; with the system, the braking force of a front wheel can be set to be small, that is, the front wheel can also have little rotation when being braked; the automobile has good direction control effect when being braked; and with two advantages, the automobile improves driving safety.

A rotation generation device is provided that includes: at least one pair of Cylindrical Containers having Chambers therein at each end to receive and discharge a fluid, the Cylindrical Containers interconnected via a tubular member and mounted essentially perpendicular to a Shaft; Threaded Caps with dual nozzles that screw on to each Chamber at the end of the Cylindrical Containers; two or more Pistons, each Piston interconnected to another Piston via a hollow tube, each Piston resides in a sliding relationship in a respective Cylindrical Container and wherein the hollow tube resides in the tubular member, the hollow tube having a length for a first of the two or more pistons to cause one of the Cylindrical Containers to receive fluid as the first piston slides within the respective Cylindrical Container, while a second of the two or more pistons causes another of the Cylindrical Containers to discharge fluid therein; a weight, residing and capable of moving laterally within the hollow tube; Pipes interconnecting adjacent Cylindrical Containers via the Cap nozzles; bellows within each Chamber of the Cylindrical Containers, wherein each bellow attaches on one end to a Piston and at an opposite end to the Chamber of the Cylindrical Container.

Disclosed is an electronic braking system and operation method thereof. The electronic braking system and operation method thereof includes a hydraulic pressure supplier configured to create hydraulic pressure by moving a hydraulic piston based on an electric signal output to correspond to displacement of a brake pedal, and a hydraulic controller configured to control hydraulic pressure of a pressure medium applied to each wheel cylinder, and performs normal operation mode, abnormal operation mode, regenerative braking mode, and check mode by controlling a plurality of valves equipped in the hydraulic controller.

A control device in a hybrid vehicle includes a controller capable of switching, between an operating state and a non-operating state, a fuel-cut recovery control in which engine rotation speed is kept at or above a predetermined rotation speed by starting supply of fuel upon the engine rotation speed falling to the predetermined rotation speed from a state in which the engine rotation speed is higher than the predetermined rotation speed and the supply of fuel is stopped.

A control device is provided for a hydraulic braking system of a vehicle, including an actuating device which is designed for outputting, at least temporarily, at least one first control signal and at least one second control signal in at least a first operating mode, taking into account at least one sensor signal. A known hydraulic braking system may be controlled with the aid of the control signals, output by the actuating device, in such a way that during an activation of a brake actuating element, at least one blending valve of a first brake circuit which is connected to the master brake cylinder via a first changeover valve is controlled into an at least partially open state in such a way that brake fluid is displaceable into at least one storage chamber, and at least one first brake pressure which is present in at least one first wheel brake cylinder of the first brake circuit is limitable, and a pressure relief valve of a second brake circuit, which is connected to the master brake cylinder via a second changeover valve, is controlled into an at least partially open state in such a way that brake fluid is displaceable into a brake fluid reservoir, and at least the first brake pressure is additionally reducible. Moreover, a hydraulic braking system is provided which includes the control device, and a method is provided for operating a hydraulic braking system.

A test bench for testing a brake comprises a pressure generating assembly for providing a brake fluid with an increased hydraulic pressure, a test bench control, and an electromechanical brake actuator. The pressure generating assembly is actuated mechanically and the brake fluid is supplied to the brake to actuate the brake. The electromechanical brake actuator, which simulates a vehicle driver's braking foot, is provided for mechanical actuation of the pressure generating assembly. The brake actuator comprises an electric motor activated by the test bench control and a planetary roller screw drive driven by the electric motor. The planetary roller screw drive is mechanically coupled to the pressure generating assembly to mechanically actuate the pressure generating assembly.

A brake control device for a utility vehicle having a trailer, including: a pneumatic brake control circuit having a vehicle pressure path to output a brake pressure to a vehicle brake which brakes the utility vehicle, based on a target input of a driver of the utility vehicle, and having a trailer pressure path for outputting the brake pressure to a trailer brake, which brakes the trailer, on the basis of the target input; and a pneumatic start assist circuit to output a further brake pressure to a trailer brake of the trailer based on a speed of the utility vehicle, in which the pneumatic start assist circuit is pneumatically connected to the trailer pressure path of the pneumatic brake control circuit.

A pressure transmission device for a power-assisted braking system of a vehicle; at its inlet, the pressure transmission device being connectible in a hydraulically operative manner to a master brake cylinder of the power-assisted braking system, and at its outlet, the pressure transmission device being connectible in a hydraulically operative manner to a wheel brake cylinder of the power-assisted braking system; the pressure transmission device including an accumulator and a linkage, which transmits a pressure difference between the inlet and the outlet to the accumulator and stores it in this.

The invention discloses a front and rear wheel braking force distribution system of a vehicle. The system comprises a double-cavity brake master pump, a front wheel brake, a rear wheel brake, a fixedproportion valve and a load sensing proportion valve, the double-cavity brake master pump is used for providing brake pressure, the front wheel brake and the rear wheel brake are communicated with twoindependent oil outlets on the double-cavity brake master pump, the fixed proportion valve is communicated between the front wheel brake and one oil outlet of the double-cavity brake master pump, theload sensing proportion valve is communicated between the rear wheel brake and the other oil outlet of the double-cavity brake master pump and used for controlling the output pressure of the double-cavity brake master pump for the rear wheel brake according to the corresponding relationship between preset rear axle load variation and ideal rear axle braking force. According to the system, the braking force of a rear axle can be reasonably distributed according to load variation of a front axle and the rear axle, so that the rear axle has suitable braking force, insufficient or excessive braking of the rear axle is avoided, and braking stability and braking reliability of the vehicle are improved. The invention further discloses a vehicle which has the advantages.

The invention relates to a control valve, an electronically controllable brake system and a method for controlling the electronically controllable brake system. The control valve for applying a spring-loaded brake pressure to spring-loaded parts of a rear-axle wheel brake is pneumatically activated as a function of a parking-brake braking demand and a service-brake braking demand. A first controlchamber is connected via a first control piston to a control arrangement in the control valve. During an adjustment of the first control chamber via the service-brake control pressure, the spring-loaded brake pressure at the working output is a function of the service-brake control pressure or of the parking-brake control pressure. The first control piston is connected to a third control chamber,wherein the pressure in the first control chamber acts on the first control piston in one direction, and the pressure in the third control chamber acts on the first control piston in the opposite direction. The first control chamber is selectively connectable to the third control chamber via a switchable bypass valve.