180 results about "Wheel cylinder" patented technology

Disclosed is a wheel cylinder and a drum brake having the same, in which the number of position as well as other elements accompanied with the piston may be reduced, resulting in reduced manufacturing cost.

The invention provides a desktop-level hardware-in-the-loop test system building method, device and equipment, and relates to the technical field of hardware-in-the-loop simulation, and the method comprises the steps: configuring a vehicle network simulation and vehicle dynamics model in an upper computer with a CAN development environment and vehicle dynamics simulation software, a real-time data channel between the two is established through a full duplex transmission protocol; a driver instruction is generated through the driving control panel, and a vehicle state signal is generated through vehicle dynamics software; the wheel speed in the vehicle state signal is converted into a physical excitation signal, and a wheel cylinder pressure signal returned by the controller is collected; the pressure signal is fed back to the vehicle dynamics model to form a closed loop, a test scene is executed, and the desktop-level hardware-in-loop test of the brake controller is completed. By using vehicle dynamics simulation software, the test confidence coefficient is improved; data exchange is carried out by utilizing an FDX protocol of a CAN development environment, and complexity and potential risks of self-development of a communication interface are avoided.

A 3-way solenoid valve, a vehicle brake system including the 3-way solenoid valve, and a controlling method for the same are disclosed. The present disclosure in at least one embodiment provides a brake system for a vehicle, including one or more wheel cylinders configured to apply braking pressure to each of wheels of a vehicle by using hydraulic pressure, one or more of the 3-way solenoid valve configured to increase or decrease the hydraulic pressure supplied to the one or more wheel cylinders, and a braking device configured to supply the hydraulic pressure to the one or more wheel cylinders by using a stepping force applied to a brake pedal or driving of a hydraulic pump.

The steel bar bending machine comprises a machine box, a first servo motor and a material suction pump, transmission wheel cylinders are installed at the two ends of the upper portion of the machine box, a fixing plate is fixedly installed on one side of the upper portion of the machine box, a limiting block is fixed to the upper portion of the middle of the fixing plate, and a first groove is formed in the upper surface of one side of the fixing plate; a first adjusting screw rod is rotationally connected to the interior of a first groove in the upper surface of the fixing plate, a first clamping block is arranged on the first groove, a supporting plate is fixed to the upper portion of the first clamping block, a first servo motor is fixed to the middle of the lower portion of the machine box, and a rotating disc is fixed to the output end of the first servo motor; a middle shaft rod is fixed to the middle of the rotating disc. The steel bar bending machine can be used in cooperation with a hole and a material suction pump, sucked and falling steel bar protection layer scraps can be conveniently sucked and discharged into a collecting box, and therefore the scraps can be conveniently collected through a scrap protection layer.

To provide a hydraulic control unit for a saddle-riding type vehicle, which includes a pump for moving a brake fluid and a holder for holding a filter through which the brake fluid passes in the pump, can be miniaturized, and can prevent the holder from not being provided in a prescribed posture.SOLUTION: The hydraulic pressure control unit includes a base body in which an internal flow path that allows a wheel cylinder and a master cylinder to communicate with each other is formed, and a pump that moves a brake fluid in the internal flow path, wherein the base body includes a recessed portion in which the pump is provided, the pump includes a cylinder in which a compression chamber that compresses the brake fluid is formed, a piston portion whose input-side end portion is pressed by a motor and whose partition-side end portion is inserted into the compression chamber to partition the compression chamber, and a holder that holds a filter through which the brake fluid flowing into the inflow flow path passes, and the holder includes an abutting portion whose base end portion is connected to the cylinder and that abuts on a wall surface of the recessed portion.SELECTED DRAWING: Figure 3

This application relates to a vehicle braking system including a DPB module (100) and an ESP module (200). The DPB module includes a accumulator (RSV), a master cylinder and a hydraulic cylinder (HM), an output port connected to one of the master cylinder and the hydraulic cylinder, a return port connected to the accumulator, a hydraulic cylinder motor (DM) for driving the hydraulic cylinder, and a first control unit. The ESP module includes wheel cylinder ports, an inlet port connected to the output port, a drain port connected to the return port, a supply line connecting the inlet valve of the wheel cylinder port to the inlet port, a drain line connecting the outlet valve of the wheel cylinder port to the drain port, a replenishment line connecting the supply line and the drain line and equipped with a pump (PE1 / 2), a pump motor (PM), and a second control unit communicatively connected to the first control unit. This application also relates to a vehicle braking method utilizing this system.

The application provides a servo motor heat dissipation system and a use method thereof in the field of servo motor heat dissipation. The servo motor heat dissipation system is characterized by the following: an annular heat exchange cavity filled with heat-conducting oil is installed on the inner side of the shell, so that the heat inside the motor is quickly transferred to the heat dissipation fins on the outer side of the shell; a fan wheel and a guide ring are used to make the airflow contact the heat dissipation fins efficiently, so that the heat is quickly taken away from the vicinity of the shell; the heat exchange efficiency is improved by the cooperation of the fan wheel and the guide ring; meanwhile, a temperature sensor is arranged, the annular heat exchange cavity is divided into an inner annular cavity and an outer annular cavity which are in communication at the ends, and a wheel cylinder is arranged in the annular heat exchange cavity; the temperature inside the servo motor is monitored, the wheel cylinder is started in time, the heat-conducting oil is circulated inside and outside the annular heat exchange cavity, the flow inside the heat-conducting oil is accelerated, and the heat exchange speed is accelerated; the heat-conducting oil is circulated inside and outside and up and down through the liquid suction cylinder, and the overall heat exchange speed of the heat-conducting oil is further improved.

The embodiment of the present application provides a kind of brake system and vehicle.The brake system includes: liquid storage pot, hydraulic assembly, support wheel cylinder assembly and at least one first electromagnetic valve, first electromagnetic valve is connected to hydraulic assembly and liquid storage pot, first electromagnetic valve is also connected to support wheel cylinder assembly;Wherein, first electromagnetic valve at least has pressure building state, first pressure relief state and second pressure relief state, in pressure building state, first electromagnetic valve is communicated with hydraulic assembly and support wheel cylinder assembly, to carry out pressure building operation for wheel;In first pressure relief state, first electromagnetic valve is communicated with hydraulic assembly and support wheel cylinder assembly, to carry out first pressure relief operation for wheel;In second pressure relief state, first electromagnetic valve is communicated with support wheel cylinder assembly and liquid storage pot, to carry out second pressure relief operation for wheel.The control accuracy of brake system provided by the embodiment of the present application is higher, and cost is lower.

The application discloses a kind of brake-by-wire control system's auxiliary pressure loop and fault detection method, comprising: liquid storage tank;The output of the liquid storage tank is connected with analog circuit and pressure loop by check isolation valve;Under normal brake assist, the analog circuit is closed, the pressure loop is communicated, and pressure brake is carried out to wheel cylinder, under the activation of ABS brake assist, the liquid supplement valve of the pressure loop is opened, and pressure is built again;Through auxiliary pressure loop, and in the fault diagnosis method in ABS activation condition, the generation of the problem of the decrease of assist performance when the vehicle mechanical backup cannot be timely cut to due to circuit leakage can be prevented, to ensure the driving safety of driver.

The utility model discloses an adhesive tape operation device capable of automatically heating and cooling, which comprises a support base, a stabilizing column, a support column, an operation platform, an operation table, an emergency stop button, an upper pressing wheel cylinder button, a double-hand starting button, a material roller, a limiting roller column, a gluing brush, a profiling tool material table and a hot air table, the stabilizing columns are installed and connected to the corresponding positions of the surfaces of the supporting columns, the operation platform is installed and connected to the ends of the supporting columns, the operation table is installed and connected to the surface of the operation platform, the scram button and the upper pressing wheel air cylinder button are installed and connected to the surface of the operation table, and the two-hand starting buttons are installed and connected to the two sides of the operation table. A product and an adhesive tape are manually stuck and put into the tool, the end passes through the upper and lower pressing wheels, and the adhesive tape bypasses the guide wheel; when a cylinder button is pressed down, an upper pressing wheel cylinder presses down to clamp the product and the adhesive tape, a rubber pipe electromagnetic valve, a hot air port and a cold air port are opened, and a starting button motor is pressed down to start upper and lower wheels to clamp the product and the adhesive tape to complete pasting.

The utility model provides a sightseeing vehicle braking system integrating automatic driving and manual driving double braking, which comprises a manual driving control module, an automatic driving control module, a manual driving control module, a first three-way valve, a second three-way valve, a second three-way valve, a third three-way valve, a third three-way valve, a fourth three-way valve and a fourth three-way valve, a third connector of the first three-way valve is connected with a first connector of the second three-way valve, a second connector of the second three-way valve is connected with the front right wheel control wheel cylinder, and a third connector of the second three-way valve is connected with the rear left wheel control wheel cylinder. A third connector of the third three-way valve is connected with a first connector of a fourth three-way valve, a second connector of the fourth three-way valve is connected with a rear right wheel control wheel cylinder, and a third connector of the fourth three-way valve is connected with a front left wheel control wheel cylinder. The brake system is reasonable in design, simple in structure, convenient to operate and high in intelligent degree due to the adoption of a double-brake system.

The present application relates to a brake control device of a vehicle. The brake control device is provided with: a control cylinder that generates a servo pressure by movement of a control piston driven by a motor; a solenoid valve of a normally open type that is provided in a hydraulic pressure transmission path from the control cylinder to a wheel cylinder; and a controller that controls the motor and the solenoid valve, the brake control device adjusting a wheel cylinder pressure of the wheel cylinder by the servo pressure. In a case where a temperature correlation value related to a temperature of a structural member involved with the motor exceeds a threshold value, the controller executes a specific process of reducing the servo pressure by closing the solenoid valve. Also, in the specific process, the servo pressure is increased at a timing at which a predetermined time elapses from a timing at which the servo pressure is reduced.

This invention discloses an electronic braking system. The electronic braking system according to this embodiment may include: a reservoir storing a pressurized medium; an integrated master cylinder having a master piston connected to the brake pedal, a main chamber whose volume changes according to the displacement of the master piston, and a sealing component sealing the main chamber; a hydraulic supply device that operates a hydraulic piston to generate hydraulic pressure according to an electrical signal output corresponding to the displacement of the brake pedal; a hydraulic control unit disposed between the hydraulic supply device and a plurality of wheel cylinders, and controlling the flow of the pressurized medium supplied to the plurality of wheel cylinders; a loop pressure sensor that senses the hydraulic pressure supplied through the hydraulic supply device; a cylinder pressure sensor that senses the hydraulic pressure in the main chamber; a check flow path connecting the main chamber and the hydraulic supply device; and a check valve disposed in the check flow path to control the flow of the pressurized medium.

The present invention diagnoses the presence or absence of an abnormality in a sensor for detecting the fluid level position of brake fluid in a reservoir. A brake system 20 comprises: a first flow path group G1 connected to a master cylinder 42; and a second flow path group G2 connected to a wheel cylinder 44. A connection state of the brake system 20 can be switched between a first state in which the first flow path group G1 and the second flow path group G2 are disconnected and a second state in which the first flow path group G1 and the second flow path group G2 are connected. The brake system 20 comprises: a pressure generation unit 66 that controls the pressure of brake fluid in the wheel cylinder 44 in the first state; and a sensor that detects the fluid level position of the brake fluid in a reservoir 43 attached to the master cylinder 42. The control device comprises: a control unit that executes fluid level control to raise the fluid level by using the pressure generation unit 66; and a diagnosis unit that diagnoses the presence or absence of an abnormality in the sensor on the basis of a detection result from the sensor during execution of the fluid level control.

The present disclosure relates to a vehicle anti-slip control method, device, equipment and medium, wherein the method comprises: when the vehicle meets the preset anti-slip control condition, obtaining the acceleration request value of the vehicle, the slope value where the vehicle is located and the current vehicle mass; determining the candidate torque value according to the acceleration request value, the slope value and the current vehicle mass; correcting the candidate torque value according to the vehicle driving data of the vehicle to obtain the target torque value; and performing conversion processing on the target torque value to determine the wheel cylinder pressure for pressure maintaining control. According to the technical solution of the present disclosure, the safety, smoothness and comfort of vehicle driving are improved.

An electronic brake system and a method of operating the same are disclosed. The disclosed electronic brake system includes: a reservoir storing a pressurized medium; the integrated master cylinder comprises a main piston connected with the brake pedal, a main chamber of which the volume can be changed according to the displacement of the main piston, and a pedal simulator connected with the main piston to provide a treading feeling; a hydraulic pressure supply device that operates the hydraulic piston to generate hydraulic pressure according to an electric signal output in accordance with the displacement of the brake pedal; a first hydraulic circuit that controls the flow of the pressurized medium supplied to the first wheel cylinder and the second wheel cylinder; a second hydraulic circuit that controls the flow of the pressurized medium supplied to the third wheel cylinder and the fourth wheel cylinder; a single backup flow path having one end connected to the main chamber and the other end connected to any one of the first hydraulic circuit and the second hydraulic circuit; a shutoff valve provided in the backup flow path to control the flow of the pressurized medium; and a connection flow path connecting the first hydraulic circuit and the second hydraulic circuit, the other ends of the connection flow path and the backup flow path communicating with each other.

The application discloses an electric control wheel cylinder with built-in motor gear device. In the electric wheel cylinder, a horizontal cylinder hole is formed in a cylinder body, and a piston piece is arranged at both ends of the horizontal cylinder hole. A motor is located outside a screw sleeve, and one end of the screw sleeve is sleeved with one end of a screw rod through threads. The motor and a sun gear are coaxially fixedly connected, the sun gear is provided with a central through hole, and the sun gear is provided with meshed planetary gears around the sun gear. The sun gear and the planetary gears are hingedly connected to a planet carrier, and the end of the screw rod after passing through the central through hole of the sun gear is connected in an axially movable mode. The screw sleeve and the screw rod extend to the hole ends of the horizontal cylinder hole and are connected with the piston pieces at both ends. The application designs a transmission mechanism of the whole electric control wheel cylinder, can realize the braking process through the electric control mode, and can integrate the parking brake and the service brake into one.

The invention provides a brake anti-lock control method, a reference vehicle speed calculation method and a torque difference correction calculation method, a plurality of brake modules with shafts as basic units are included, power supply of each brake module is connected with the same battery, air supply of each brake module is connected with the same air storage tank, and the air storage tank is connected with the reference vehicle speed calculation method and the torque difference correction calculation method. The communication of each brake module is connected with the same master control ECU; the brake module comprises a brake pressure module, a brake wheel cylinder and a wheel speed sensor, and the brake pressure module comprises a first brake output port and a second brake output port; the first brake output port and the second brake output port are respectively connected with at least one brake wheel cylinder; the brake pressure module is used for controlling the actual pressure of a brake wheel cylinder according to the brake pressure of each wheel received on the whole vehicle network; by applying the technical scheme, the calculation of master control can be reduced, and the chassis supporting more axes can be realized.

The application discloses a kind of anti-immersion self-adjusting gap brake wheel cylinder, including piston, dust cover, cylinder and leather bowl, dust cover is integrally provided with first piston sealing ring near the position of piston, the first tower type bending part is integrally arranged near the position of first piston sealing ring of dust cover, first piston sealing ring is arranged in piston dust cover recess, and first piston sealing ring is integrally provided with first waterproof convex rib on the side of piston dust cover recess part insertion;The second piston sealing ring is integrally arranged near the position of cylinder of dust cover, the second tower type bending part is integrally arranged near the position of second piston sealing ring of dust cover, the second piston sealing ring is arranged in cylinder dust cover recess, and the second piston sealing ring is integrally provided with second waterproof convex rib on the side of cylinder dust cover recess part insertion;The above technical solution, structure design is reasonable, simple structure, good waterproof performance, good dustproof effect, good sealing performance and practical good.

A vehicle braking device includes: a first hydraulic pressure output unit that is connected to a master chamber through a first liquid passage and outputs hydraulic pressure to first wheel cylinders based on a hydraulic pressure of the first liquid passage; a hydraulic pressure generating unit that generates hydraulic pressure independently of a master cylinder; a second hydraulic pressure output unit that is connected to the hydraulic pressure generating unit through a second liquid passage and outputs hydraulic pressure to second wheel cylinders based on a hydraulic pressure of the second liquid passage; a normally closed communication control valve that is provided in a communication passage connecting the first liquid passage and the second liquid passage and opens and closes the communication passage; and a normally open master cut valve in the first liquid passage on the master cylinder side relative to a connection portion with the communication passage.

A redundancy brake apparatus includes a redundancy hydraulic circuit part connected to a main brake apparatus and a wheel cylinder part of a vehicle to allow brake fluid to flow, and a hydraulic block for auxiliary braking including an oil accommodation part that accommodates the brake fluid and is connected to the redundancy hydraulic circuit part to allow the brake fluid to flow, and an opening formed to allow air to flow into the oil accommodation part.

The invention relates to a vehicle control method and system based on a central computing platform and an area controller, and the method comprises the steps: collecting sensor data of a target vehicle through the area controller, and uploading the sensor data to the central computing platform; the central computing platform analyzes and optimizes the sensor data based on a physical model and an optimization algorithm to obtain the optimal brake pressure of each wheel cylinder, and the physical model comprises the influence of the sensor data on the friction coefficient between tires and the ground and the influence of weight transfer on the loads of the tires; and generating a corresponding control instruction according to the optimal brake pressure of each wheel cylinder, issuing the control instruction to a region controller to control the target vehicle, obtaining an execution state, and feeding back the execution state to the region controller. According to the invention, centralized control and dynamic scheduling of functions of the whole vehicle are realized, and complexity and integration difficulty of the system are reduced.

The anti-rust treatment equipment for the automobile parts comprises an oil washing mechanism and clamping mechanisms, the oil washing mechanism comprises an oil washing pool, a first hydraulic cylinder, a motor, a rotating frame and an impeller, the multiple clamping mechanisms are evenly distributed on the rotating frame in the circumferential direction, and each clamping mechanism comprises a second hydraulic cylinder, a clamping plate and a supporting strip; the second hydraulic cylinder drives the clamping plate to move, a plurality of brake wheel cylinder bodies are clamped and fixed between the clamping plate and the supporting strip, the first hydraulic cylinder drives the rotating frame to ascend and descend so that the clamped brake wheel cylinder bodies can be completely immersed in anti-rust oil in the oil washing pool, and the motor drives the rotating frame to rotate and drives the brake wheel cylinder bodies to move in the oil. The motor further drives the impeller to rotate through the transmission structure, oil liquid in the oil washing pool is stirred upwards, and the surface and threaded holes of the oil washing pool are washed. Efficient cleaning of the brake wheel cylinder body is achieved, it is guaranteed that anti-rust oil fully permeates, and cleaning and protection are free of dead corners.

The application provides a vehicle steering assisting method, device and system. The device comprises a vehicle hydraulic braking system, wherein the vehicle hydraulic braking system comprises a pressure building main path, a pressure building branch path, a liquid storage tank and wheel cylinders. The pressure building main path is communicated with the pressure building branch path, brake fluid can flow from the liquid storage tank to the pressure building branch path through the pressure building main path, and the pressure building branch path is communicated with the wheel cylinders of different wheels from the communication position with the pressure building main path. A pressure building valve is arranged on the path of the pressure building branch path leading to the wheel cylinders of different wheels. The pressure building valves on the paths of different wheel cylinders can cause pressure difference between the wheel cylinders, form wheel speed difference between the wheels and generate steering assisting force. The application can improve the functional safety level of the whole vehicle without setting a redundant electric power steering device, and the safety and economy are considered, the modification of the whole vehicle is small, and the adaptability is high.

An apparatus and method for controlling residual pressure in an electronic stability control (ESC) integrated brake system are disclosed. The apparatus for controlling residual pressure in an ESC integrated brake system of the present disclosure includes: a master cylinder configured to generate brake hydraulic pressure through a master piston; a hydraulic pressure regulating valve configured to regulate hydraulic pressure, in which the hydraulic pressure regulating valve is provided in a hydraulic pressure flow path connected between the reservoir and a wheel cylinder configured to perform braking of each wheel; and a processor configured to: adjust a position of a master piston of the master cylinder according to whether the master cylinder satisfies a preset residual pressure control activation condition; and controls the hydraulic pressure regulating valve based on the required pressure of the master cylinder and the loop pressure.

The invention discloses a redundant braking method and an electric two-wheeled vehicle, which are applied to the technical field of vehicle control and are used for solving the problem of poor braking reliability of the electric two-wheeled vehicle in the prior art. The method specifically comprises the steps that when a brake signal is received, main operation parameters of a main brake channel and redundant operation parameters of a redundant brake channel corresponding to the brake signal are obtained; when the main real-time wheel cylinder pressure and the redundant real-time wheel cylinder pressure meet the data deviation condition, main theoretical wheel cylinder pressure and redundant theoretical wheel cylinder pressure are obtained through a preset theoretical pressure generation model; determining a channel fault detection result based on the main real-time wheel cylinder pressure, the redundant real-time wheel cylinder pressure, the main theoretical wheel cylinder pressure and the redundant theoretical wheel cylinder pressure; the target braking channel is determined based on the channel fault detection result, the braking of the electric two-wheeled vehicle is controlled through the target braking channel, the health state of the braking channel can be accurately judged in real time, and the fault-tolerant capability and operation reliability of braking of the electric two-wheeled vehicle are remarkably enhanced.

The application relates to a redundant braking system with power-off self-braking, a control method and application thereof, and a redundant braking system based on a series double-cavity caliper, comprising a pump, an accumulator, a normally-open valve, a normally-closed valve and a brake wheel cylinder; an oil outlet of the pump is communicated with the accumulator, an oil inlet of the brake wheel cylinder is communicated with an oil outlet of the accumulator and a brake master cylinder of a vehicle system; the normally-open valve is connected between the accumulator and the brake wheel cylinder, and the normally-closed valve is connected between the brake master cylinder and the brake wheel cylinder; the normally-open valve and the normally-closed valve are powered by a power supply of the vehicle system. The technical scheme can meet the technical requirement that the braking function is still available when the power supply fails.

The application discloses an active pressure building and pressure regulating control system, which comprises a main pressure building unit, an oil can, a first electromagnetic valve, a second electromagnetic valve, a liquid pumping mechanism, a first one-way valve, a second one-way valve, a first pipeline, a second pipeline, a third pipeline and a control unit. One end of the first pipeline is connected with the main pressure building unit, the other end of the first pipeline is connected with a first wheel cylinder, and the first electromagnetic valve is connected with the first pipeline. One end of the second pipeline is connected with the oil can, the other end of the second pipeline is connected with the first wheel cylinder, the liquid pumping mechanism, the first one-way valve and the second one-way valve are connected with the second pipeline. One end of the third pipeline is connected with the second pipeline between the oil can and the first one-way valve, the other end of the third pipeline is connected with the first wheel cylinder, and the second electromagnetic valve is connected with the third pipeline. The control unit is electrically connected with the first electromagnetic valve, the second electromagnetic valve and the liquid pumping mechanism. The active pressure building and pressure regulating control system can actively build pressure and regulate pressure, and timely take over the vehicle braking. The application also relates to a vehicle.

A brake control device reliably decelerates and stops a vehicle at the time of failure of the brake control device, having a simplified system configuration and high reliability for automated driving. A brake device of the present invention includes a first unit, a second unit, and a connection pipe, where the first fluid pressure unit includes a first cutoff valve, a first pressure regulation unit, and a first control unit, and the second fluid pressure unit includes a second cutoff valve, a second pressure regulation unit, and a second control unit. The brake device further includes a third pressure regulation unit and a fourth pressure regulation unit that regulate brake fluid pressures supplied from the first pressure regulation unit and the second pressure regulation unit 105s to the plurality of first wheel cylinders and the plurality of second wheel cylinders respectively, and third control units that control these units.

The invention provides a self-adaptive anti-slip control system and method based on road surface recognition, and relates to the technical field of vehicle control. The rotating speeds and longitudinal accelerations of driving wheels and non-driving wheels of a vehicle and the slip level of the driving wheels are obtained through an electronic hydraulic brake control module; determining the pavement type of the current driving pavement; the method comprises the following steps: determining a wheel cylinder pressure control parameter of a driving wheel by adopting a pressure control strategy based on a road surface type and a slip level, generating a control instruction based on the wheel cylinder pressure control parameter, and sending the control instruction to a hydraulic actuator to execute pressure regulation, so as to realize height self-adaptive control on different road surfaces, improve the starting stability and driving efficiency of a vehicle and improve the safety of the vehicle. And the real-time performance and effectiveness of anti-slip control are enhanced.