24 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.

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 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 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 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.

To ensure that braking force can be generated in the vehicle even if one of the two power sources fails to supply power. [Solution] The braking system 30 includes two front wheel braking units 41FL, 41FR provided corresponding to each of the two wheel cylinders 21 and adjusting the hydraulic pressure of the corresponding wheel cylinders 21; a switching unit 43 that can switch between a connected state in which the two wheel cylinders 21 are in communication and a disconnected state in which the communication between the two wheel cylinders 21 is blocked; two rear wheel braking units 60RL, 60RR provided corresponding to each of the two rear wheels 11RL, 11RR and adjusting the braking force generated by the corresponding rear wheels 11RL, 11RR; a first power supply 71 that supplies power to the front wheel braking unit 41FL and the rear wheel braking unit 60RR; and a second power supply 72 that supplies power to the front wheel braking unit 41FR and the rear wheel braking unit 60RL.

The application provides a brake-by-wire control system, and relates to the technical field of automobile electronics, which comprises a signal input module, a brake function module and a hydraulic control module which are sequentially connected in communication; the signal input module is used for collecting state observation data of a vehicle and sending the state observation data to the brake function module; the brake function module is used for determining a wheel cylinder pressure request signal based on the state observation data and sending the wheel cylinder pressure request signal to the hydraulic control module; and the hydraulic control module is used for outputting a target brake torque based on the wheel cylinder pressure request, and the target brake torque is used for controlling the vehicle to brake. The above-mentioned modules can improve the flexibility of the Onebox brake-by-wire control system.

A drum brake device for a vehicle may comprise: a first brake shoe and a second brake shoe, which are movably connected to a back plate and spaced apart from each other; a wheel cylinder, which is positioned between one end of the first brake shoe and one end of the second brake shoe and is designed to expand the distance between the one ends of the first and the second brake shoe; and an actuator, which is positioned between the other end of the first brake shoe and the other end of the second brake shoe and is designed to provide a driving force for expanding the distance between the one ends of the first and the second brake shoe and the distance between the other ends of the first and the second brake shoe.

The utility model provides a kind of high-strength anti-impact combined train brake pad inlay mechanism belongs to train brake technical field.The high-strength anti-impact combined train brake pad inlay mechanism, including brake caliper body and brake caliper body outer wall two sides respectively integrally made into shape with two brake oil cylinder, it is characterized by: brake caliper body inside is equipped with two brake blocks, two brake oil cylinder inner portions are respectively equipped with two wheel cylinder pistons, two wheel cylinder pistons telescopic end is respectively fixedly connected with two brake blocks inside by two locking components, two brake blocks opposite face is respectively provided with two clamping slots, two clamping slots inner portions are respectively installed with two brake pads, two brake pads are respectively fixedly connected with two brake blocks by two groups of inlay components, wherein, by brake oil cylinder inner cavity equipped wheel cylinder piston and brake block, locking component, clamping slot and brake pad and the cooperative matching of inlay component, brake pad is not easily replaced, and the problem that impact resistance is not enough can be effectively solved.

A kind of polytetrafluoroethylene microporous film calender, including equipment platform, calender table, cutter seat, cutter, transmission belt main wheel, transmission belt motor, clamp cylinder, clamp positioning rod, the front part of the equipment platform is fixedly connected with calender table, the lower part of calender table is rotatably connected with calender bottom wheel, the lower part of calender table is fixedly connected with calender motor, the output shaft of calender motor is fixedly connected with calender bottom wheel, the side portion of calender table is fixedly connected with guide column, the side portion of lifting frame is fixedly connected with guide seat, guide column is adapted to guide seat, guide column connects guide seat, guide seat slides in guide column, the upper portion of calender table is fixedly connected with calender wheel cylinder, the lower portion of calender wheel cylinder is fixedly connected with lifting frame, calender top wheel is rotatably connected in the lower portion of lifting frame.

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 on 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 adjusts 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 closes the solenoid valve and reduces the servo pressure to a lower limit pressure set based on a maximum rated value at which continuous power supply to the structural member is possible. Further, when a differential pressure between the wheel cylinder pressure and the lower limit pressure is small, the controller reduces a valve current supplied for closing the solenoid valve compared to when the differential pressure is large.

The braking control device of the present invention is applicable to vehicles equipped with regenerative braking devices in the front wheels. The device includes: a control cylinder that generates a base pressure using an electric motor as a power source; a solenoid valve that adjusts the base pressure to an adjustable pressure; and a controller that controls the electric motor and the solenoid valve. The device controls the front wheel cylinder pressure via the adjustable pressure and controls the rear wheel cylinder pressure via the base pressure. The controller performs either single-system pressure adjustment to achieve a total braking force corresponding to the required braking amount by making the adjustable pressure equal to the base pressure, or dual-system pressure adjustment to achieve a total braking force by making the adjustable pressure less than the base pressure while maintaining the front-rear distribution of the total braking force at a predetermined value. Furthermore, a first indicated pressure for controlling the adjustable pressure under single-system pressure adjustment and a second indicated pressure for controlling the adjustable pressure under dual-system pressure adjustment are calculated, and based on a comparison of the first and second indicated pressures, single-system pressure adjustment and dual-system pressure adjustment are selected.

A braking system 30 comprises: two front wheel braking units 41FL, 41FR that are provided corresponding to respective two wheel cylinders 21 and that adjust hydraulic pressure of the corresponding wheel cylinders 21; a switching unit 43 that is switchable between a communication state in which the two wheel cylinders 21 communicate with each other and a cut-off state in which the communication between the two wheel cylinders 21 is cut off; two rear wheel braking units 60RL, 60RR that are provided corresponding to respective two rear wheels 11RL, 11RR and that adjust braking force generated at the corresponding rear wheels 11RL, 11RR; a first power supply 71 that supplies power to the front wheel braking unit 41FL and the rear wheel braking unit 60RR; and a second power supply 72 that supplies power to the front wheel braking unit 41FR and the rear wheel braking unit 60RL.

This invention relates to an electronic hydraulic braking system and control method for a medium-sized off-road vehicle. The system includes a brake fluid reservoir connected to a master cylinder, a front axle power unit, and a rear axle power unit. The master cylinder is connected to a hydraulic power assist unit, and the front and rear axle power units are also connected to the hydraulic power assist unit. The hydraulic power assist unit is connected to the wheel brake cylinders via a hydraulic ESC regulator. The master cylinder forms an independent dual-channel circuit, enabling independent control of the front and rear axle braking circuits. The hydraulic power assist unit and the hydraulic ESC regulator form independent front and rear dual-circuit hydraulic control units, which can independently control the oil pressure of the front and rear axle brake cylinders. This effectively achieves adjustable braking force at each wheel, helping the driver control the vehicle to achieve a safe driving speed and improving braking safety.

To properly improve safety of a straddle-type vehicle.The controller includes a determination unit and an execution unit. The determination unit (63) determines, based on at least one of a first master cylinder pressure and a second master cylinder pressure, whether a braking operation is performed. The execution unit executes a driving support mode, in which a braking force generated in a straddle-type vehicle is amplified, when the determination unit determines that the braking operation is performed. The execution unit, in the driving support mode, amplifies: the braking force generated in the straddle-type vehicle, based on surrounding environment information about environment around the straddle-type vehicle; the braking force generated in the straddle-type vehicle with the amplification of the second wheel cylinder pressure superior to the amplification of the first wheel cylinder pressure when the rider performs the braking operation with the operation of the first braking operation unit superior to the operation of the second braking operation unit; and the braking force generated in the straddle-type vehicle with the amplification of the first wheel cylinder pressure superior to the amplification of the second wheel cylinder pressure when the rider performs the braking operation with the operation of the second braking operation unit superior to the operation of the first braking operation unit.

The braking control device of the present invention is applied to a vehicle equipped with a regenerative braking device in the front wheels, and comprises: a control cylinder that generates a base pressure using an electric motor as a power source; a solenoid valve that adjusts the base pressure to a regulating pressure; and a controller that controls the electric motor and the solenoid valve to control the front wheel cylinder pressure of the front wheel cylinders by adjusting the pressure, and to control the rear wheel cylinder pressure of the rear wheel cylinders by using the base pressure. The controller calculates the required fluid volume to be supplied to the front and rear wheel cylinders as the front wheel standard fluid volume and the rear wheel standard fluid volume based on the front wheel target pressure and the rear wheel target pressure, respectively, and controls the electric motor based on the front wheel standard fluid volume and the rear wheel standard fluid volume, and controls the solenoid valve based on the front wheel target pressure and the rear wheel target pressure.

A braking control device for a vehicle includes “an upper braking unit configured to output a supply pressure by throttling, with a pressure adjustment valve, a circulation flow discharged by a fluid pump driven by an electric motor”, and “a lower braking unit disposed between the upper braking unit and a wheel cylinder and configured to adjust the supply pressure to output a wheel pressure to the wheel cylinder”. When the lower braking unit executes an antilock brake control, the upper braking unit increases a rotation number of the electric motor.

A braking device 30 comprises: a first supply source 34A having an electric cylinder 40 that supplies brake fluid to a wheel cylinder 211; a second supply source 34B having an electric cylinder 40 that supplies brake fluid to a wheel cylinder 212; a switching unit 35; and a processing circuit 71. When all of the plurality of supply sources 34A, 34B are normal, the processing circuit 71 controls the switching unit 35 to create a cut-off state, and causes the plurality of supply sources 34A, 34B to operate through forward movement amount control. If an abnormality occurs only in one supply source among the plurality of supply sources 34A, 34B, the processing circuit 71 creates a communicating state by control of the switching unit and causes the normal supply source to operate through hydraulic control.

A braking device 30 comprises: a first supply source 34A that includes an electric cylinder 40 that supplies brake fluid to a wheel cylinder 211; a second supply source 34B that includes an electric cylinder 40 that supplies brake fluid to a wheel cylinder 212; a switching unit 35; and a processing circuit 71 that, when an abnormality occurs in only one of the plurality of supply sources 34A, 34B, executes retraction processing in which a piston of the supply source in which the abnormality is occurring is moved to the initial position of the piston by setting the state of the switching unit 35 to a communication state and causing the brake fluid to be supplied from the supply source having no abnormality to the supply source in which the abnormality is occurring.

The application relates to a vehicle braking system comprising a BWA module and an ESP module, the BWA module comprising an actuator motor, an actuator, a master cylinder, a reservoir, a master cylinder port in communication with the master cylinder, a reservoir port in communication with the reservoir, and a first control unit in communication with a pedal sensor and for controlling the actuator motor; the ESP module comprising a wheel cylinder port, a liquid inlet port in communication with the master cylinder port, a liquid outlet port in communication with the reservoir port, a liquid supply line in communication with the wheel cylinder port, the liquid inlet port and provided with a system pressure valve, a liquid discharge line in communication with the wheel cylinder port, the liquid outlet port, a liquid make-up line in communication with the liquid supply line and the liquid discharge line and provided with a pump, a pump motor, and a second control unit in communication with the first control unit and for controlling the pump motor. The application also relates to a vehicle braking method using the system.

The present invention relates to a double lock structure. A lock housing includes a faceplate and a base. A number lock mechanism includes a plurality of number wheels, a plurality of wheel cylinders for receiving the number wheels, a plurality of wheel cylinder springs, and a wheel bar. The number wheels are arranged in intervals, and the wheel bar is received in the wheel cylinders. The wheel cylinder springs are elastically pressed between the wheel cylinders. The wheel cylinders have flat portions and circular lugs. A key lock mechanism includes a lock base and a lock cylinder. A control piece set includes a lock cylinder control piece, a support spring, and a shaft wheel. The lock cylinder control piece is abutted against the lock base and selectively abuts against the flat portions or the circular lugs. The support spring is elastically pressed against a bottom surface of the lock cylinder control piece. The lock cylinder control piece has a convex shaft, and the shaft wheel is sleeved with the convex shaft. When the lock cylinder control piece abuts against the circular lugs, the lock cylinder control piece is flipped around the convex shaft to lock the lock base.