263 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 discloses a driving and braking suspension cooperative control method, device and equipment, a medium and a product, and relates to the field of vehicle active safety control. The method comprises the steps that a driving demand analysis and decision module determines driver demand torque, a control mode and a neutral steering target according to the vehicle state, the steering angle of a steering wheel of a driver and input information of a driving / braking pedal; the hybrid coordination control module determines front and rear motor torques according to the torque required by a driver and the vehicle state under the conventional working condition, and determines four-wheel cylinder brake pressure by using sliding mode control according to the vehicle state; the torque vector optimization distribution control and Smith predictor control method is adopted to determine the torque of a front motor, the torque of a rear motor and the brake pressure of a four-wheel cylinder according to the torque required by a driver, the vehicle state and a neutral steering target under the limiting working condition, and the weighted pseudo-inverse distribution vehicle body posture coordination control is adopted to determine the damping force of the semi-active suspension. The method can achieve the precise tracking of the expected neutral steering target, and gives full play to the lateral movement limit of the vehicle.

The embodiment of the invention provides a vehicle braking control method and device.The vehicle braking control method comprises the steps that vehicle operation parameters of a running vehicle are obtained and subjected to weighted fusion processing, and a dynamic working condition index is generated; acquiring a real-time driving signal of a current driver in a sliding window at preset time and importing the real-time driving signal into a preset driving intention prediction model to generate a driving intention type; according to the dynamic working condition index and the driving intention type, the braking force demand level of each wheel cylinder is determined; and the brake oil quantity of each wheel cylinder is adjusted based on the brake force demand level so as to adjust the brake condition of the vehicle, and the brake oil quantity of each wheel cylinder is corrected in real time according to the obtained feedback signal. According to the method, accurate matching of brake pressure distribution and vehicle dynamic characteristics can be achieved, front and rear shaft brake torque distribution is effectively balanced under the curve brake working condition, the response time from driving intention recognition to pressure adjustment execution is shortened, and the coordination control capacity of a brake system is improved under the sudden avoidance scene.

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.

This application describes examples of a brake-by-wire system and a control method. In one example, a braking control system includes a brake master cylinder, a first pressure booster, a second pressure booster, at least one first interface, at least one first control valve, at least one second control valve, at least one third control valve, at least one fourth control valve, and a second pedal feel simulation system. The at least one first interface is connected to at least one brake wheel cylinder, respectively. The brake master cylinder and the at least one first interface are respectively connected through the at least one first control valve. The first pressure booster and the at least one first interface are respectively connected through the at least one first control valve. The second pressure booster and the at least one first interface are respectively connected through the at least one third control valve.

Proposed is an electro-hydraulic brake device including a main brake unit configured to provide a braking fluid to a plurality of wheel cylinders by driving a motor, a storage unit connected to the main brake unit, and configured to store the braking fluid, an auxiliary brake unit configured to provide the braking fluid to one or more of the wheel cylinders when an operational failure of the main brake unit occurs, and configured to divide a hydraulic line of a hydraulic circuit unit physically by a function, wherein the hydraulic circuit unit disposed at a block unit is connected to the main brake unit and the storage unit.

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 invention provides a hydraulic pressure control method for a wheel cylinder of a brake-by-wire system of an electric vehicle. The hydraulic pressure control method comprises the following steps: constructing a nonlinear model of an electronic hydraulic brake system of the electric vehicle; designing a self-adaptive expansion state observer based on an improved particle swarm optimization algorithm to estimate the initial hydraulic pressure of the wheel cylinder of the electric vehicle; taking the estimated initial hydraulic pressure of the wheel cylinder of the electric vehicle as input, and designing a sliding mode attitude controller based on a self-adaptive expansion state observer; the improved sliding mode control method is obtained by improving an objective function and a fitness function established by an alpha evolutionary algorithm, improving a sliding mode surface equation through the objective function and the fitness function, and introducing a chaotic disturbance term, an evolutionary compensation term and a self-adaptive buffeting suppression factor. And the hydraulic pressure of the wheel cylinder of the electric vehicle is controlled through an improved sliding mode control method. According to the invention, high-precision hydraulic pressure control can be realized, and the anti-interference capability is improved.

A vehicle brake system includes: a plurality of wheel cylinders, a main pressure building module, a redundant pressure building module and a brake master cylinder assembly; the main pressure building module is separately connected to the plurality of wheel cylinders and is used for conveying a brake fluid to the plurality of wheel cylinders; the redundant pressure building module is connected to at least one wheel cylinder and is used for conveying the brake fluid to the at least one wheel cylinder; and the brake master cylinder assembly is separately connected to the plurality of wheel cylinders and is used for conveying the brake fluid to the plurality of wheel cylinders. Further disclosed is a vehicle.

The invention provides a method for detecting the comprehensive performance of a suspension air supply module, and the method comprises the steps: receiving a control instruction from a bus detection tool, and enabling the control instruction to be used for controlling the adjustment of a pressure pump and the opening and closing of a valve, so as to achieve the switching of air paths among an air storage tank, an inflation channel, an exhaust channel and a wheel cylinder; and detecting a suspension air supply module according to the control instruction. According to different detection item contents, different gas paths are flexibly arranged, the test model and the test sequence are not limited, the automation degree is high, the test period is short, the test result is reliable, the repeatability is good, and a reference is provided for standardization of ASU comprehensive performance test.

The present invention relates to a brake wheel cylinder, comprising a housing, a wedge, and a sleeve assembly. The sleeve assembly comprises a tappet, a sleeve, a screw, and a drive ring. A C-shaped spring and a winding spring are disposed between the tappet and the sleeve. Transmission balls are disposed on both sides of the wedge to cooperate with the tappet to achieve transmission. Inclined surfaces are formed on both sides of the wedge to cooperate with the transmission balls. Inclined surfaces are also formed on the side of the tappet to cooperate with the transmission balls. A ball retaining member is also disposed on the wedge to support a pair of transmission balls. The advantages of the present invention are that transmission balls are used as intermediate transmission between the wedge and the tappet, the transmission balls themselves can freely rotate 360 ​​degrees in any direction, and point-to-surface or line-to-surface contact can be achieved between the transmission balls and the wedge and tappet, thereby greatly reducing the contact area, avoiding the occurrence of jamming, and ensuring stable transmission.

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.

The utility model discloses a wheel cylinder with a self-exhausting function, which comprises a pump shell, a gas cavity and a liquid cavity arranged behind the gas cavity and communicated with the gas cavity are arranged in the pump shell, the front end of the gas cavity is open, and the liquid cavity is provided with a liquid cavity liquid inlet hole; the piston rod is arranged in the liquid cavity, and the front end of the piston rod extends into the air cavity; the piston disc is positioned in the air cavity and is fixed at the front end of the piston rod; the liquid cavity liquid inlet hole is located in the position, close to the first sealing assembly, of the top of the liquid cavity. The clutch has the function of automatically exhausting air in the liquid cavity when the piston rod returns, the influence of air residues in the liquid cavity on the stroke of a clutch system is avoided, and thorough separation of the clutch is guaranteed.

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.

Disclosed are an electronic brake system and an operating method thereof. The electronic brake system according to the present embodiment comprises: a reservoir having a pressurization medium stored therein; an integrated master cylinder having a master piston, a master chamber of which the volume varies according to the displacement of the master piston, and a sealing member sealing the master chamber; a simulator valve that controls the flow of the pressurization medium between the reservoir and the master chamber; a hydraulic supply device that operates a hydraulic piston on the basis of an electrical signal output in response to a displacement of the brake pedal and generates hydraulic pressure; and a hydraulic control unit provided between the hydraulic supply device and a plurality of wheel cylinders, wherein whether a component element including the integrated master cylinder leaks may be determined on the basis of an inspection flow path connected to the master chamber and an inspection valve provided in the inspection flow path.

The invention provides a control method and device of a braking system, electronic equipment and a storage medium, and belongs to the technical field of automobile braking, in the method, a collaborative architecture of AI dynamic prediction, 14-degree-of-freedom physical model constraint verification and multi-target model prediction control is adopted to carry out coupling analysis on road condition-vehicle-tire data, and a control result of the braking system is obtained. Wherein in the multi-objective model prediction control, optimization objectives comprise brake distance error, wheel cylinder pressure change rate, yaw velocity and energy recovery efficiency, the process retains the advantage of processing complex nonlinearity by AI, and the obtained four-wheel adaptive optimal brake pressure distribution scheme ensures physical rationality and also has the optimal brake pressure distribution effect. The electro-hydraulic servo braking system has the advantages that multi-dimensional optimal balance of braking distance, stability, comfort, energy efficiency and the like is achieved, the self-adaptive capacity is good, the response speed of electro-hydraulic servo braking is high, and the collaborative requirements of functional safety and energy recovery in an automatic driving scene can be met.

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 utility model discloses a clearance self-adjusting drum-type forklift brake which comprises a brake drum, a brake shoe is installed at the front end of the brake drum, a brake wheel cylinder is installed at the upper position of the front end of the brake shoe, a sleeve is connected to the outer wall of a return spring in a sleeved mode, and the outer wall of the return spring is sleeved with a brake wheel cylinder. According to the device, a sleeve is connected to the outer wall of a return spring in a sleeving mode, when the return spring is stretched, the sleeve can rotate with a gear shaft rod as a circle center shaft, the gear shaft rod rotates in a gear groove, the gear shaft rod can rotate in the gear groove, and therefore the brake shoe can rotate in the gear groove; and meanwhile, the stretching of the return spring enables the upper supporting seat to generate displacement, the upper supporting seat moves along the connecting column, and the movement of the connecting column enables the pushing plate to extrude the stainless steel spring, so that the displacement amplitude of the return spring can be limited when the brake shoe is subjected to applied force, and the phenomenon that the return spring falls off is prevented.

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 invention provides a brake system and a vehicle, and relates to the technical field of vehicle braking, the brake system comprises a brake pedal, a liquid storage tank, a single-cavity brake module, a motor voltage buildup module and a wheel cylinder module; the liquid storage tank is used for providing brake liquid for the brake system; a cavity of the single-cavity brake module is connected with the liquid storage tank; a cavity of the motor voltage buildup module is connected with the liquid storage tank; the wheel cylinder module is connected with the wheel end brake; when the motor pressure buildup module does not work, the liquid storage tank supplies oil to the wheel cylinder module through the single-cavity brake module, or when the motor pressure buildup module is matched with the single-cavity brake module to work, the liquid storage tank supplies oil to the wheel cylinder module through the motor pressure buildup module. The single-cavity brake module is adopted in the system, an oil way is simplified on the basis of ensuring the brake safety, the number of parts in the brake system is reduced, the manufacturing cost is saved, and the assembly steps are simplified.

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.