333 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.

An electronic control unit for an electronic brake system, and a hydraulic assembly are disclosed. The electronic control unit comprises: a housing having a hydraulic block which is mounted on the front surface thereof and in which a plurality of valves, a flow path, and a pump are provided in order to regulate hydraulic brake pressure transmitted to a plurality of wheel cylinders; a control unit for controlling the plurality of valves and a motor which is accommodated in the housing and provides power to the pump; a first connector provided at the front surface of the housing so that the control unit can be electrically connected to an external device; and a second connector, wherein the first connector is disposed above the position at which the hydraulic block is mounted, and the second connector can be disposed below a reservoir mounted at a first side surface of the hydraulic block.

An electronic brake system and an operating method thereof are disclosed. Provided is an electronic brake system, according to the present embodiment, comprising: a first hydraulic pressure supply device for generating hydraulic pressure by means of an electric signal output in response to the displacement of a brake pedal; an oil pressure control unit including a first oil pressure circuit for controlling the hydraulic pressure of a first wheel cylinder and a second wheel cylinder, and a second oil pressure circuit for controlling the hydraulic pressure of a third wheel cylinder and a fourth wheel cylinder; and a second hydraulic pressure supply device which is connected between the first oil pressure circuit and the first and second wheel cylinders, and which generates hydraulic pressure by means of an electric signal if the first hydraulic pressure supply device and / or the oil pressure control unit malfunctions.

A vehicle braking device includes: an electric cylinder in which a piston driven by an electric motor slides in a cylinder to supply fluid; a hydraulic pressure output unit connected to the electric cylinder by way of a first liquid passage, the hydraulic pressure output unit pressurizing or depressurizing a hydraulic pressure in the first liquid passage and outputting the hydraulic pressure to a supply liquid passage connected to a first wheel cylinder; and a control unit that causes at least one of the electric cylinder and the hydraulic pressure output unit to generate the hydraulic pressure in the first wheel cylinder according to a relative position between the piston and the cylinder.

A electric brake system includes a main device that provides a first hydraulic pressure to a plurality of wheel cylinders respectively installed on a plurality of wheels, based on a position of a brake pedal; and art auxiliary device that provides a second hydraulic pressure to first and second wheel cylinders respectively installed on first and second wheels among the plurality of wheels based on the position of the brake pedal in a state in which the main device does not generate the first hydraulic pressure. The auxiliary device receives power from a power network different from that of the main device, and the auxiliary device controls at least one of first and second parking brakes respectively installed on third and fourth wheels among the plurality of wheels. In such an electric brake system, when the main device fails or is out of control, the auxiliary device may auxiliary generate the hydraulic pressure required for braking and may generate braking force using the parking brake.

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.

A braking control device includes a pressure adjustment unit that adjusts a wheel pressure Pw of a wheel cylinder by a servo pressure Pu generated using an electric motor as a power source, a solenoid valve provided in a hydraulic pressure transmission path from the servo pressure Pu to the wheel pressure Pw, and a controller that controls the pressure adjustment unit. The controller calculates a pressure loss Pd in the solenoid valve based on an instruction pressure Ps calculated from a braking request amount Bs and the wheel pressure Pw. Then, the controller determines a target pressure Pt by adding the pressure loss Pd to the instruction pressure Ps, and controls the pressure adjustment unit based on the target pressure Pt.

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 braking apparatus includes a pedal part pressurized for braking by a driver, a master cylinder part in which pressure of oil is amplified by the pedal part, a block part connected to the master cylinder part, supplied with the oil, and configured to amplify the pressure of the oil as an electric pump is driven by power applied thereto, a wheel cylinder part connected to the block part and configured to provide a braking force to a wheel, and a variable valve part mounted on the block part and configured to adjust the flow amount of oil based on a flow rate of the oil that is discharged by the electric pump.

The invention discloses a heavy-duty vehicle electric wheel structure and a using method thereof, and belongs to the technical field of electric vehicle drive.The heavy-duty vehicle electric wheel structure comprises a rim, a planetary reducer and a drum brake are connected to the inner surface of the rim, a cavity is formed in the drum brake, and a hub motor is installed in the cavity; the hub motor is connected with the planetary reducer through a motor shaft, the planetary reducer comprises a sun gear, a planet gear, a gear ring and a planetary reducer shell which are sequentially connected, the sun gear is connected with the motor shaft, the planetary reducer shell is connected with the rim, and a motor shell, a motor outer end cover and a motor inner end cover are arranged on the outer side of the hub motor. The two sides of the motor shell are connected with the motor outer end cover and the motor inner end cover respectively, the drum brake comprises a brake drum, a brake shoe and a brake wheel cylinder which are connected in sequence, the brake wheel cylinder is connected with the motor inner end cover, the brake drum is connected with the rim, the motor shell is connected with the brake drum, the design and assembly processes of independent components are reduced, and therefore the manufacturing cost is reduced.

A brake apparatus for a vehicle, comprising: a 3-way solenoid valve unit including one or more 3-way solenoid valves, a valve block having a first surface on which the 3-way solenoid valve unit is installed, at least one accumulator, a pressurizing unit, and a plurality of wheel cylinders, wherein each 3-way solenoid valve includes a first port, a second port, a third port, a first opening / closing flow path, and a second opening / closing flow path, and at least a part of the at least one accumulator is disposed between the 3-way solenoid valve unit and a second surface of the valve block.

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 discloses an unmanned mine car slip rate control method based on superhelix second-order sliding mode control. The method comprises the following steps: deriving a second-order slip rate system kinetic equation based on a wheel kinetic model; introducing a steepest differential tracker to carry out slip rate differential estimation; converting the second-order slip rate kinetic equation into an error variable form for expression; designing a non-singular sliding mode surface according to a fixed time convergence theorem, and calculating the control rate of second-order sliding mode control based on a superhelix algorithm: issuing a braking torque control signal to a hydraulic braking control unit of the unmanned mine car, and further adjusting the braking pressure of a wheel cylinder. The method has the advantages that the actual slip rate of the wheels is controlled to be close to the target slip rate, the locking phenomenon is prevented when the mine car is braked, and the braking efficiency and safety of the mine car are improved.

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 brake device may comprise: a hydraulic pressure supply unit fluidically connected to wheel cylinders of a vehicle; a parking brake arranged at at least one of the wheel cylinders; a first processor electrically connected to the hydraulic pressure supply unit and the parking brake; and a second processor electrically connected to the parking brake, and electrically connected to the first processor through a signal line. The first processor can control the hydraulic pressure supply unit on the basis of output signals of a pedal sensor of the vehicle, control the parking brake on the basis of output signals of a parking switch of the vehicle, and provide periodic signals to the second processor through the signal line. The second processor can control the parking brake on the basis of the output signals of the pedal sensor if the periodic signals of the first processor are not received.

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.