57results about How to "Reduced brake response time" patented technology

A pressure control method for a brake cylinder of a magnetically levitated train comprises the steps that the error between an actual value of the brake cylinder pressure and a final target value of the brake cylinder is worked out and recorded as a target error; the error between the actual value of the brake cylinder pressure and a target value of the impulse limit of the brake cylinder is worked out and recorded as a transient error; a first threshold value and a second threshold value are set; when the target error is larger than the first threshold value, an inflating and deflating electromagnetic valve is opened normally; when the target error is larger than the second threshold value but smaller than the first threshold value, the open time of the inflating and deflating electromagnetic valve during one control cycle is adjusted according to the transient error and recorded as a rough adjusted duty ratio; when the target error is smaller than the second threshold value, the open time of the inflating and deflating electromagnetic valve during one control cycle is adjusted according to the transient error and recorded as a fine adjusted duty ratio; and the rough adjusted duty ratio is larger than the fine adjusted duty ratio. The method is conducted based on the target pressure and the impulse limit target, on the premise that the impulse limit target and the target pressure of the brake cylinder are met, more precise control can be achieved, the brake response time is shortened, the brake distance is decreased, and the steady-state performance of the brake cylinder is improved.

The invention discloses a trailer control valve which comprises a valve body with an inner cavity. A travel brake cavity, a large piston return cavity, a booster cavity, an air outlet cavity and a parking cavity are formed in the inner cavity of the valve body from top to bottom in sequence, an air inlet, an air supply opening, an air outlet, an exhaust port, a travel control opening and a parking control opening are communicated with the inner cavity of the valve body and are formed in the valve body, a pressure increasing valve, a pressure reducing valve and a pressure preparing valve which are communicated with one another are arranged on the valve body, the air inlet is communicated with an air cylinder of a motor tractor, the air supply opening is communicated with the air inlet through a throttling valve and outputs air pressure to an energy supply pipeline of a trailer, the air outlet is communicated with the air inlet through a combined valve, and the combined valve is a normally-closed valve and is controlled by the travel control opening/the parking control opening. Double-loop control of electric control signals and air control signals is adopted, the electrical control over the trailer control valve is achieved, the defect that in the traditional air pressure control process, due to the fact that the pipeline is long, air pressure signals are slow to transmit is overcome, and the vehicle brake response time is shortened.

The invention discloses an automobile EBS system based on a braking main valve. The automobile EBS system comprises an EBS electronic control unit, the braking main valve, a front shaft braking air chamber, a rear shaft braking air chamber, a first electromagnetic valve assembly, a second electromagnetic valve assembly, a first proportional relay valve, a second proportional relay valve, an electromagnetic valve, a wheel speed detection device and a pressure sensor assembly. The braking main valve is provided with a first loop air outlet and a second loop air outlet. The front shaft braking air chamber is sequentially connected with the first electromagnetic valve assembly, the first proportional relay valve, the electromagnetic valve, the pressure sensor and the second loop air outlet through a control pipeline. The rear shaft braking air chamber is sequentially connected with the second electromagnetic valve assembly, the second proportional relay valve and the first loop air outlet through a control pipeline. The EBS electronic control unit is electrically connected with the braking main valve, the first electromagnetic valve assembly, the second electromagnetic valve assembly, the first proportional relay valve, a second proportional relay valve, the electromagnetic valve, the wheel speed detection device and the pressure sensor assembly. The automobile EBS system is low in cost and enables the arrangement difficulty of a whole automobile to be reduced.

The invention relates to a multi-functional wet axle of a 5-10 T fork-lift truck. Service brakes of the drive axle are wet brakes; inner shells of the left brake and the right brake are provided with a first lubricating oil passage respectively; the first lubricating oil passages on the two sides are communicated with one ends of a right cooling oil pipe and a left cooling oil pipe respectively; the other ends of the right cooling oil pipe and the left cooling oil pipe are connected with a first port and a second port of a three-way pipe respectively; a cooling oil outlet pipe is arranged at the bottom of a drive axle shell corresponding to a main speed reducer assembly; a wheel hub body is provided with an oil drainage hole, a second lubricating oil passage and a third lubricating oil passage respectively; a third port of the three-way pipe and the cooling oil outlet pipe are communicated with an outlet and an inlet of a lubricating pump respectively; and thus, a forced circulatory lubrication system is formed. The service life of the wet axle is 3-5 times the service life of normal drum brakes, and the brake performance does not decline after the wet axle is used for more than three years; and the problem of insufficient engine power supply caused by large size of a hydraulic oil tank and additional arrangement of a cooling fan due to sharing of a cooling mechanism with a hoisting system is solved.

The invention particularly relates to a new energy vehicle brake sensing and pedal position active adjusting type pedal mechanism. The mechanism comprises a brake pedal, a brake rod, a pedal sensing simulator, a support and a push rod device, wherein the brake pedal is rotationally connected with one end of the brake rod through a stepping motor, and the other end of the brake rod is rotationally connected with the support; an angle sensor is arranged between the brake rod and the support, and a pre-induction sensor is arranged on the brake pedal; the pedal feeling simulator comprises a magnetorheological fluid damper and a spring damper, and the spring damper comprises a spring shell and a damping spring arranged in the spring shell; the magnetorheological fluid damper comprises a magnetorheological fluid shell, a damping piston, magnetorheological fluid and a coil, the damping piston, the magnetorheological fluid and the coil are arranged in the magnetorheological fluid shell, the damping piston moves front and back, the magnetorheological fluid shell is fixedly connected with the spring shell and the support, and a damping piston rod penetrates through the spring shell in a sliding mode and is rotationally connected with the brake rod; the damping piston rod is provided with a limiting piece for adjusting the pre-tightening force of the damping spring; the push rod device drives the support to move back and forth.

The invention relates to a four-drive running mechanism for a development machine, which is composed of two groups of track systems. Each group of track system mainly includes a track, a drive wheel, two guiding drive wheels and a wheel support saddle thereof, a tightener, a running bracket, drive power sources and a decelerator. The running mechanism is provided with four drive power sources to simultaneously drive the two guiding drive wheels and two back drive wheels to provide ultra-strong driving force for the development machine and simultaneously reduce the height of the gravity center of a chassis of the development machine, greatly improve the braking capacity and response speed of a running part and prolong the service life of the track.

The invention discloses a brake clearance pre-filling control method, equipment, a storage medium and a device. The method comprises the steps that the current working state of a target vehicle is obtained; it is judged whether the current working state meets a brake clearance pre-filling triggering condition or not; and when the current working state meets the brake clearance pre-filling triggering condition, the brake system is pre-filled with brake pressure. When the current working state meets the brake clearance pre-filling triggering condition, the brake system is pre-filled with the brake pressure so as to reduce the air clearance between the brake disc and the brake friction plate, then if the brake pedal is treaded down again, the effective brake pressure can be generated immediately, and therefore, the braking response time and the time for achieving the target deceleration are shortened, when a driver conducts emergency braking, the air gap between the brake disc and the friction plate can be actively eliminated, the braking response time is shortened, and the purpose of improving the driving safety is achieved.

The invention provides a drum type brake with an automatic and continuous adjustable gap. The drum type brake comprises a fixing plate, a right friction sheet, a return spring group, a lower brake cylinder assembly, a left friction sheet and an upper brake cylinder assembly, wherein the fixing plate is fixedly mounted on a vehicle axle; the upper brake cylinder assembly and the lower brake cylinder assembly are fixedly mounted on the fixed plate respectively; an upper buckle part of the right friction sheet is mounted in a right brake push cylinder notch on the upper brake cylinder assembly; and a lower buckle part of the right friction sheet is mounted in a right brake push cylinder notch on the lower brake cylinder assembly. According to the drum type brake with the automatic and continuous adjustable gap, the gap between a brake disc and a brake friction sheet of the drum type brake can be realized, and the gap between the brake disc and the brake friction sheet can be stable; and the brake responding time is shortened and the brake safety is improved.

The invention discloses a pedal-feeling simulator for a vehicle and the vehicle with the pedal-feeling simulator. The vehicle comprises a pedal, and the pedal-feeling simulator comprises a shell, a linear motor and an elastic part; and the linear motor comprises a motor primary part, a motor secondary part and a motor push rod, the motor primary part is fixed to the inner wall of the shell, the motor secondary part is arranged in the motor primary part, the motor secondary part is matched with the motor primary part so as to enable the motor secondary part to axially move relative to the motorprimary part, the motor secondary part sleeves the motor push rod to drive the motor push rod to move synchronously, the first end of the motor push rod extends out of the shell to be suitable for being connected with the pedal, and the elastic part is used for applying elastic force to the motor push rod. The pedal-feeling simulator for the vehicle is high in response speed, has a good braking effect, and meanwhile can provide a good 'brake feeling', especially a pedal braking feeling, for a driver.

The invention discloses a high-speed multi-oil-path torque motor rotating table for a numerical control machine tool. The high-speed multi-oil-path torque motor rotating table is characterized in by comprising a workbench, a lubrication groove, a rotating seal ring, a bearing, a pneumatic clamping system, a sliding seat, a core shaft, an oil separating sleeve, a torque motor, an oil separating block and an oil separating plate, the lubrication groove is formed in the workbench, a rotating seal ring is arranged on the lubrication groove, a sliding seat is arranged at the lower portion of the workbench, the pneumatic clamping system is arranged above the sliding seat, the bearing is arranged above the pneumatic clamping system, the torque motor is arranged in the sliding seat, the oil separating sleeve is arranged in the torque motor, the core shaft is arranged in the oil separating sleeve, the oil separating block is arranged at the bottom of the sliding seat, and the oil separating plate is arranged below the oil separating block.

The invention discloses a floating caliper disc brake with a permanent magnet. The floating caliper disc brake comprises a brake caliper and a brake disc, wherein a first groove is formed in the brake caliper at one side of the brake disc; a fixed brake block is arranged on the brake caliper at the other side of the brake disc; a second groove is further formed at the first groove; the permanent magnet is arranged at the groove bottom of the second groove; an armature is arranged at the first groove; a clamping groove is formed in the side, facing the permanent magnet , of the armature; the other side of the armature is connected with a movable brake block; and an excitation coil is arranged in the clamping groove. With the adoption of the technical scheme, the following effects are realized: the armature and the permanent magnet respectively drive the movable brake block and the fixed brake block to move towards the brake disc simultaneously, on one hand, the phenomenon that the movable brake block and the fixed brake block are not close to the brake disc simultaneously to cause inconsistent abrasion in a traditional floating caliper disc brake is avoided, and on the other hand, the brake response time is shortened since the movable brake block and the fixed brake block are close to the brake disc simultaneously, therefore, the braking efficiency is improved.

The invention belongs to the technical field of automobiles, and discloses a braking device and an anti-lock braking system. The braking device comprises an ABS solenoid valve and a brake air chamber,the ABS solenoid valve comprises an air inlet and an exhaust port, and the air inlet and the exhaust port can be selectively opened and closed; the brake air chamber is arranged on the ABS solenoid valve, a vent is formed in the brake air chamber, and the vent can be respectively communicated with the air inlet and the exhaust port. The braking device forms the brake air chamber integrated with the ABS solenoid valve, has a compact overall structure, and is convenient to install and arrange. The braking response time is greatly reduced, and the braking performance is improved. In addition, when the braking is released, the remaining compressed gas in the braking air chamber can be discharged through the exhaust port at the fastest speed to quickly release the braking, and the decompression process of the ABS solenoid valve and the brake return time are greatly reduced, thereby reducing the rate at which a brake heats up and improving the performance of the ABS solenoid valve.

The invention discloses a hydraulic brake device. The hydraulic brake device comprises two brake discs and a brake pad, the two brake discs are oppositely arranged and connected with each other, cavities are formed in the brake discs, and the two cavities are in communication with each other; mounting grooves are concavely formed in the surface, facing the other brake disc, of one brake disc, thetwo mounting grooves are oppositely formed and define a mounting space, brake bosses are convexly arranged on the bottom walls of the mounting grooves, the interiors of the brake bosses are in communication with the cavities, the two brake bosses are oppositely arranged, and oil filling holes communicated with the cavity are formed in any brake disc; the brake pad is arranged in the mounting spaceand located between the two brake bosses, the protruding ends of the brake bosses face the brake pad, and the surfaces, facing the brake pad, of the brake bosses can be close to or away from the brake pad so as to lock or release the brake pad. According to the hydraulic brake device, the braking force of the braking device is increased so as to shorten the braking response time.

The invention discloses a tread cleaning device. The tread cleaning device comprises a cylinder body, a first piston and a second piston, the first end of the first piston is in sealed sliding connection with the cylinder body, the first piston is sleeved with a first spring and a thrust sleeve, a through hole is formed in the first piston, and a movable block is embedded in the through hole. The second piston can penetrate through the first piston in a sealed and sliding mode, a second spring and a spring seat are arranged in the second piston, a second guide hole is formed in the second piston, the spring seat penetrates through the second guide hole and then is fixedly connected with the first piston, and a clamping groove is formed in the second piston. A radial hole is formed in the thrust sleeve, and a thrust piece is arranged in a cavity defined by the radial hole, the cylinder body and the second piston. The thrust piece can push the movable block to move after the second piston axially moves relative to the first piston, so that part of the movable block is clamped in the clamping groove. The tread cleaning device not only has a gap adjusting function, but also can ensure that the braking force change is small when the elongation of the piston is continuously increased.

The invention provides a hydraulic control air valve and an automobile brake control system, comprising a housing and a piston, the housing has a cavity, and the piston is slidably arranged in the cavity along the axial direction to divide the cavity into a first cavity chamber and the second chamber; the piston slides toward the second chamber as the pressure of the first chamber changes to have an initial position, a first position and a second position. When the piston is in the initial position, the first compensation hole communicates with the second In the second chamber, the brake air inlet is not connected to the brake air outlet; when the piston is in the first position, the piston cover seals the first compensation hole, and the brake air inlet is not connected to the brake air outlet; When the piston is in the second position, the piston cover seals the first compensation hole, and the air intake channel is connected with the brake air intake inlet and the brake air intake outlet. The scheme provided by the invention can realize the integration of clutch and brake of the automobile, achieve the effects of convenient operation and cost reduction, shorten the control pipeline, and reduce the braking response time.