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.

The invention relates to a friction brake for industry and automobiles, which is structurally characterized in that a brake friction pair consists of a brake pressure stressing piece and a stressed piece, wherein the friction surfaces of the brake pressure stressing piece and the stressed piece adopt conical surfaces, and another mode relative to the existing drum brake that the cylindrical surface and the disk brake adopt the end surfaces to produce friction torque is adopted, and the conical surface friction brake belongs to the technical field of mechanical devices and transportation. As the conical surface friction brake has the characteristics of the realization of being automatically reinforcing and changing the included angles between the brake acting force and the conical surfaces, so as to adjust the size of the torque, and the like, the friction brake can improve the interchangeability of the brake parts, widen the friction material selecting range, save the energy sources, and increase the brake torque, as a result, the friction brake has wide application prospect in the industry and the automobile brakes.

The invention discloses a vehicle braking method, system and equipment and a medium. The vehicle braking method comprises the following steps: receiving a starting signal sent by an automatic drivingsystem; responding to the starting signal, and collecting a speed change rate and a stroke of a brake pedal through a pedal stroke sensor; obtaining an initial brake pressure corresponding to the stroke of the brake pedal based on the fact that the speed change rate is greater than a preset first threshold value; increasing the initial brake pressure to obtain an actual brake pressure; braking thevehicle according to the actual brake pressure. According to the method, the speed change rate of the brake pedal can be detected in real time, and when the speed change rate is larger than the threshold value, the brake pressure is increased, so that rapid braking is achieved; three brake pressure curves are adopted to obtain different initial brake pressures, that is, different brake pressure curves are obtained before and after the automatic driving system is started, so that the actual brake pressure can be changed along with different road conditions and vehicle conditions, and a drivercan brake the vehicle in time.

The invention discloses an electric cylinder device with autonomous braking and parking braking functions. The electric cylinder device with the autonomous braking and parking braking functions comprises a main cylinder shell, a screw rod shell and a motor, wherein a piston is slidably arranged in the main cylinder shell; a first cavity D and a second cavity A are formed between the front end of the piston and the main cylinder shell as well as between the middle part of the piston and the main cylinder shell; an inner hole is formed in the middle of the back end of the piston; a compensatinghole C for communicating a liquid storage tank and the first cavity D, a liquid supply hole B for communicating the liquid storage tank and the second cavity A, and a liquid drainage hole E for communicating the first cavity D and a wheel brake are formed in the main cylinder shell; a packing cup is arranged on the front end surface of the piston; a screw rod pair and a planetary gear reduction mechanism are arranged in the screw rod shell; the front end of a screw rod stretches into the inner hole; a gap is left between the front end surface of the screw rod and the inner hole; and the motorprovides rotation power for the screw rod through the planetary gear reduction mechanism. The invention further discloses a braking system and a braking control method thereof. The braking system hasthe autonomous braking and parking braking functions, and is simple in structure, low in cost and fast in braking response.

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.

The utility model relates to a braking system of a motorcycle which adopts a front-rear linkage braking system and can make the braking feeling of the motorcycle better. In the braking device of a motorcycle equipped with ABS in which the brake caliper on the rear wheel side is linked to the brake operation on the front wheel side, when the front wheel braked by the brake operating part on the front wheel side When the ABS is activated, the ratio of the brake pressure of the brake calipers on the front wheel side and the rear wheel side can be changed compared to the case where the ABS is not activated.

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 discloses a wet brake with a step sealing structure. The wet brake comprises a piston (1) and a shell (2), wherein a sealing element is arranged at the cooperating part of the shell (2) with the outer diameter of the piston (1), and the sealing element is a step sealing element (3); the step sealing element (3) comprises a rubber O-ring and a wear-resisting ring. In the wet brake provided by the invention, the O-ring is a force application element, provides a sufficient sealing force and compensates the wear-resisting ring, and the wear-resisting ring plays the action of wear resistance in the use process so as to reduce wearing, therefore, the sealing property is enhanced, the service life is prolonged, and the braking effect of the wet brake is improved.

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 discloses an ignition supercharging type engine braking method, and belongs to the technical field of engine braking. The method particularly comprises the following steps that 1, an electronic control unit sends out a signal to an engine supply system at an intake stroke stage, and combustible mixed gas serves as a working medium to be sucked into a cylinder; 2, a crankshaft position signal of a crankshaft sensor is collected through the electronic control unit, an instruction is given out to an ignition device after a compression stroke is started, the combustible mixed gas in the cylinder is ignited, and a fuel gas compression stage is conducted; 3, before a piston reaches top dead center at a compression stroke, the electronic control unit controls an electronic control unit to be switched on, gas in the cylinder is exhausted, and a working and exhausting stage is conducted. According to the ignition supercharging type engine braking method, the compression working medium is high-pressure gas obtained after combustion of the combustible mixed gas; compared with an air working medium, on the condition that the air inflow is the same, resistance can be greatly increased by controlling chemical and physical state changes of the gas intake working medium of the engine at different time and changing an ignition working medium, and therefore braking power is greatly increased.

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 relate to a automobile brake system. Gas liquid mixing multiple plunger disk brake system, It comprises a hydraulic disk brake(2), a hydraulic pump(7), a fluid storage jar(8), The piston of the hydraulic main pump(7) connected with the piston of the hydraulic sub pump of the hydraulic disk brake(2) via oil tube, Its characteristic is: the piston rod of the hydraulic main pump (7) connected with the air pressure piston rod of power air compartment (9), the air cavity of the power air compartment (9) connected with the output port of the air pressure brake control valve (13) via a first air pipe (10), The air pressure brake control valve (13) is equipped a brake pedal(12), the input port (A),input port (B) of the air pressure brake control valve (13) connected with the tow mutual independence gas houses of the gas storage or the gas storages via second air inlet pipe(11) and third inlet pipe(14) separately. The invention is provided with traits of strong brake press, small pedal force, short braking length and even force on the brake friction block.

The invention relates to a decoupled electromechanical hydraulic integrated brake boosting system. The system comprises an electronic control unit (ECU), an oil can and a hydraulic unit, the hydraulicunit comprises a brake master cylinder, a pedal feeling simulator, a stroke sensor, a boosting master cylinder and a transmission mechanism connected with a piston of the boosting master cylinder, the inner cavity of the brake master cylinder is divided into a first working cavity and a second working cavity by a first piston and a second piston, the first working cavity is connected with a firstnormally closed valve and a first normally open valve, the first normally-closed valve is connected with a pedal feeling simulator, the second working cavity is connected with a second normally-openvalve, the inner cavity of the boosting master cylinder is connected with a second normally-closed valve and a third normally-closed valve, the first normally-open valve and the second normally-closedvalve are both connected with the first output port of the hydraulic unit, and the second normally-open valve and the third normally-closed valve are both connected with the second output port of thehydraulic unit. The brake master cylinder with a small cylinder diameter is adopted, so when the brake master cylinder fails, higher brake pressure can be established through the same pedal force, larger deceleration is achieved, and recovery of all brake energy is achieved.

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.

The invention provides a braking system applied to a hardware-in-loop HiL test. The brake system comprises a first brake master cylinder and a second brake master cylinder, the first brake master cylinder comprises a first cavity and a second cavity, and the second brake master cylinder comprises a third cavity and a fourth cavity; the brake pedal is connected with a piston of the second brake master cylinder; a first connecting pipeline and a second connecting pipeline, and a pressure sensor is arranged on the first connecting pipeline and used for acquiring the pressure of the braking system; the first one-way valve and the second one-way valve are respectively arranged on the first connecting pipeline and the second connecting pipeline; and the pressure mechanism is connected with the piston of the first brake master cylinder, and the pressure mechanism is used for driving the piston of the first brake master cylinder to move and can keep the position of the piston of the first brake master cylinder. The brake system applied to the hardware-in-the-loop HiL test can adapt to various test working conditions, obtain larger brake pressure, accurately control system pressure or maintain system pressure, is convenient to use, and improves test efficiency.

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.

The invention relates to the technical field of automobile control methods, in particular to a braking energy recovery control method. When the car is under braking conditions, the relevant signals are used to judge whether the total braking torque of the previous cycle has been adjusted, so as to determine the total braking torque of this cycle; when the vehicle controller does not receive the working flag signal , obtain the current target braking deceleration and current braking deceleration of the vehicle, obtain the first limit value and second limit value of this braking cycle through the current target braking deceleration, and compare the current braking deceleration with the first limit value value and the second limit value, the vehicle controller assigns the current cycle electric brake and the current cycle hydraulic brake under the premise of prioritizing the electric brake according to the comparison result; the first limit value is smaller than the second limit value. In the braking energy recovery of the present invention, electric braking is applied first, and the insufficient part is supplemented by hydraulic braking, so that the energy in the braking process is recovered to the greatest extent, the energy recovery is more efficient, and the vehicle is smoother in the braking process.