41results about How to "High brake pressure" patented technology

The present invention relates to a brake-by-wire actuator for actuating the brake system of a motor vehicle, comprising a simulator which can be acted upon by a brake pedal, with a signal of an actuation sensor being sent to an electronic control unit which controls a pressure source in response to the signal of the actuation sensor, and wherein an output of the pressure source is connected to a distributor device for the brake force and actuates individual wheel brakes of the vehicle, also comprising means for enabling actuation of the brakes by muscular power within a fallback mode. In order to provide an improved fallback mode in a brake-by-wire actuator, according to the invention, a lost travel is provided between a first actuation component such as a brake pedal in particular or a component articulated at the brake pedal and an actuation component that is connected downstream in the flux of force, in particular an input member, in order to uncouple the first actuation component mechanically from the reactions of force of the motor vehicle brake system in the by-wire mode.

The invention relates to an electronically controlled pneumatic braking system (100) comprising at least one braking circuit (A, B) with which at least one control valve (13, 11) for adjusting brakingpressures (p1, p2, p3, p4) is associated, the at least one control valve (13, 11) being controllable electronically in accordance with a control signal (SA, SB) and pneumatically in accordance with acontrol pressure (pA, pB). According to the invention, a second brake valve (25) is provided in addition to a first brake valve (24), the second brake valve (25) being able to output a pneumatic second brake valve control pressure (pA2, pB2) in an electronically controlled manner. The first brake valve (24) can, in addition to an actuation signal (S1), pneumatically output a first brake valve control pressure (pA1, pB1). The two brake valves (24, 25) are disposed in the pneumatic braking system (100) in such a way that the first brake valve control pressure (pA1, pB1) of the first brake valve(24) and/or the second brake valve control pressure (pA2, pB2) of the second brake valve (25) is/are output as the control pressure (pA, pB) to the at least one control valve (13, 11) in order for the at least one control valve (13, 11) to be pneumatically controlled, and the second brake valve (25) can be electronically controlled when the at least one control valve (11, 13) is prevented from being electrically controlled, such that an electronically-pneumatically controlled redundancy is created.

Disclosed is a full-pressure regulation type braking control method for an aircraft anti-skid braking system. According to the full-pressure regulation type braking control method, dual-range control is adopted, so that braking efficiency is improved and safety is ensured. Dual-range control refers to that one mode is adopted when Pm is not less than Pk, and another mode is adopted when Pm is less than Pk. The full-pressure regulation type braking control method for the aircraft anti-skid braking system has the advantages that nonlinear control is adopted when a value is between a target braking pressure value and a braking command voltage; when the braking command voltage is positioned in a low-gain region and the target braking pressure value Pm corresponds to the braking command voltage with high precision, a pilot can manipulate an aircraft flexibly in a glide braking phase; when the braking command voltage is positioned in a high-gain region and the target braking pressure value Pm corresponds to the braking command voltage with low precision, the pilot can apply maximal braking pressure rapidly if necessary, so that braking efficiency is improved and braking distance is shortened.

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.

The invention relates to a control device (60) for a brake system of a rail vehicle (10), the brake system having at least one first brake device (41-48) and a second brake device (41-48; 71, 72, 77, 78), which devices can be actuated by an actuating force during a braking process. The first brake device (41-48) and the second brake device (41-48; 71, 72, 77, 78) are adhesion-type brake devices. The control device (60) is capable of receiving and/or generating a loss of adhesion signal, which identifies insufficient adhesion for the first and/or second brake device (41-48), and is also designed, during a braking process, to actuate the first and/or second brake device (41-48; 71, 72, 77, 78) with an increased actuating force if a loss of adhesion signal is present. The invention also relates to a brake system for a rail vehicle comprising a control device of this type, to a corresponding rail vehicle and to a method for controlling the brake system of a rail vehicle using a control device.

A lifesaving apparatus for high building is composed of rope, case with suspending arm fixed to its top, static friction part installed to left of case, movable friction part matched with said static one to form a rope channel between them, pull spring hook, the boosting connection rod consisting of left and right connection rods, etc. Its advantages are dropping down at uniform speed, and high safety.

The invention relates to a method for operating a hydraulic braking system of a motor vehicle and the hydraulic braking system. The method for operating the hydraulic braking system of the motor vehicle, wherein the hydraulic braking system having a brake master cylinder and an electronic control device having an anti-lock braking system (ABS) function, comprises: determining whether the brake pressure requested by a vehicle's driver exceeds a wheel lock brake pressure (10) at which at least one of the wheels of the vehicle locks up; and activating the brake master cylinder electromechanically if the requested brake pressure exceeds the wheel lock brake pressure, to reduce the brake pressure produced by the brake master cylinder to a value lower than the brake pressure requested by the driver.

The invention provides a method for reducing the situation that a J-shaped turning state is erroneously judged to be a separated road state. When the separated road state is initially detected and an ABS of a vehicle is started, the method continues to execute the following steps that the absolute value |vDiff_Geo| of a geometric sliding rate is calculated, the geometric sliding rate is |vDiff_Geo|= (vFR-vFL)-(vRR-vRL), vFR is the speed of a right front wheel, vFL is the speed of a left front wheel, vRR is the speed of a left rear wheel, and vRL is the speed of a left rear wheel; a first specific value of the speed ratio of the left rear wheel to the right rear wheel and a second specific value of the speed ratio of the right rear wheel to the left rear wheel are calculated; the absolute value of the geometric sliding rate is compared with a set first threshold value, whether the first specific value or the second specific value is within a set area range or not is judged, and whether the situation that the J-shaped turning state is erroneously judged to be the separated road state exists or not is determined according to a comparison result and a judgment result. The invention further discloses a method for judging vehicle turning, a controller and a vehicle. The method can reduce erroneous judgment, and brake performance can be improved.

The invention relates to a method for controlling a compressed air brake system (1) of a vehicle, comprising the following steps: in the case of driver braking (FB) by actuating a brake pedal, outputting a similar driver brake pressure via a brake pressure control line, an activation device to a brake circuit, set in a driver brake position (S4 = 0), comprising at least one ABS shut-off valve device, a brake line and a wheel brake (St4); in the case of there being an external brake request signal of a driver assistance system without simultaneous driver braking, switching the activation deviceinto a functional position; conveying a system pressure to the ABS shut-off valve device; and modulating a similar brake pressure on the at least one brake line of the brake circuit with the at leastone wheel brake by controlling the ABS shut-off valve device (St5), characterised in that when there is driver braking as well as an external brake request signal, the driver brake pressure is measured and a driver brake pressure value is determined, the driver brake pressure value and an external brake pressure value contained in the external brake request signal are added or superimposed to form a combined brake pressure value, and the activation device is switched into the functional position and the combined brake pressure value is modulated from the system pressure by controlling the ABSshut-off valve device (St6).

The invention relates to the technical field of vehicle braking control systems or components thereof, in particular to a distributed braking system with multiple working modes and a parking function.The distributed braking system comprises a braking pedal, a manpower cylinder, a braking controller and a power supply, and further comprises at least three electric cylinders electrically connectedwith the braking controller; the electric cylinders are correspondingly connected to wheel brakes with the same number on a vehicle one to one; each electric cylinder and the corresponding wheel brakeform a braking loop; and each electric cylinder comprises a shell, a motor connected with the shell, a cylinder body, and a piston part slidingly arranged in the cylinder body. The distributed braking system is characterized by further comprising a disc part and a connecting rod; one end of the connecting rod is hinged with the piston part; and the other end of the connecting rod is eccentricallyand rotationally connected with the disc part. The distributed braking system has such advantages as compact structure, fast braking response, capability of realizing the parking function, reliable failure protection capacity and low manufacturing cost, and is high in vehicle braking reliability.

PCT No. PCT/DE96/01351 Sec. 371 Date May 21, 1997 Sec. 102(e) Date May 21, 1997 PCT Filed Jul. 18, 1996 PCT Pub. No. WO97/12791 PCT Pub. Date Apr. 10, 1997A hydraulic brake system for a vehicle with an anti-lock arrangement operable by wheel brake pressures are individually variable in front wheel brakes and rear wheel brakes, connected to diagonal brake circuits, of a four-wheeled vehicle, in order to reduce or eliminate a threat of wheel locking. The anti-lock arrangement has at least one return pump per brake circuit. The anti-lock arrangement is equipped with a total of four electrically controllable valves. In each of the brake circuits I, II there is one first valve between the master cylinder and a front wheel brake and one second valve between the master cylinder and the rear wheel brake. All the valves are embodied as normally open valves and are electrically closable. Inlets of each of the return pumps communicate directly with the respective front wheel brakes and indirectly with the rear wheel brakes through throttles. Check valves that open toward the inlets of the return pumps are provided in series with the throttles. The anti-lock arrangement creates the possibility that in the anti-lock mode, for instance in travel on an icy road, rear wheel brake pressures may be higher than front wheel brake pressures, to improve the braking action.