803 results about "Master cylinder" patented technology

A brake system includes a reservoir and a motor-driven master cylinder for actuating a plurality of wheel brakes. A secondary power transmission unit provides pressurized hydraulic fluid at first and second PTU outputs for actuating the wheel brakes in at least one of a normal non-failure braking mode and a backup braking mode. The secondary power transmission unit includes an electric PTU motor and at least two pump pistons. At least two brake pressure sensors are provided. Each brake pressure sensor is located directly adjacent a corresponding wheel brake for sensing hydraulic pressure at the corresponding wheel brake and responsively producing a brake pressure signal. An electronic control unit is provided for controlling at least one of the secondary power transmission unit and the master cylinder responsive to at least one brake pressure signal. The secondary power transmission unit is directly fluidly connected to the reservoir.

A brake system includes a master cylinder generating pressure at first and second MC outputs for actuating first and second pairs of wheel brakes. A secondary brake module is configured to provide fluid at first and second PTU outputs for actuating the wheel brakes. The secondary brake module includes an electric motor configured to selectively pressurize the hydraulic fluid by transmitting rotary motion to at least two pump pistons. A pump inlet attenuator is interposed hydraulically between a reservoir and the pump pistons and in direct fluid connection with the reservoir via a single return line. An electronic control unit controls at least one of the secondary brake module and the master cylinder responsive to a brake pressure signal. The pump inlet attenuator regulates pressure in the single return line to reduce pressure fluctuations at an inlet side of each pump piston via solely mechanical pressure attenuation.

A brake system for actuating a plurality of wheel brakes comprising first and second pairs of wheel brakes includes a reservoir and a motor-driven master cylinder operable during a normal non-failure braking mode to generate brake actuating pressure at first and second MC outputs for hydraulically actuating the first and second pairs of wheel brakes. A secondary power transmission unit is configured for selectively providing pressurized hydraulic fluid at first and second PTU outputs and includes an electric PTU motor configured to selectively pressurize the hydraulic fluid by transmitting rotary motion to at least two pump pistons. The secondary power transmission unit is indirectly fluidly connected to the reservoir to selectively draw hydraulic fluid therefrom.

A brake system includes a motor-driven master cylinder for generating brake actuating pressure at first and second MC outputs for hydraulically actuating pairs of wheel brakes. A secondary brake module is configured for selectively providing pressurized hydraulic fluid at first and second PTU outputs for actuating the first and second pairs of wheel brakes. A low pressure accumulator is interposed hydraulically between the first and second pairs of wheel brakes. The low pressure accumulator is in indirect fluid communication with the reservoir via the first and second MC outputs and the master cylinder. The low pressure accumulator at least partially provides slip control to the wheel brakes in coordination with the secondary brake module when the brake system is in the normal non-failure braking mode.

A brake system includes a reservoir and first and second motor-driven master cylinders. An electronic control unit is provided for controlling at least one of the first and second master cylinders responsive to at least one brake pressure signal. A secondary power transmission unit is configured for selectively providing pressurized hydraulic fluid at first and second PTU outputs for actuating first and second pairs of wheel brakes in at least one of a normal non-failure braking mode and a backup braking mode. Each of the first and second PTU outputs provides fluid to a corresponding one of the first and second pairs of wheel brakes. The secondary power transmission unit is directly fluidly connected to the reservoir.

The invention discloses a spiral friction extruder and an extrusion forming method, comprising a first fixed beam, a movable beam, an outer sliding block, a second fixed beam, a first master cylinder, a perforating cylinder, a second master cylinder, a turntable, a central sliding block, a rotating extrusion rod, an extrusion barrel, a positive extrusion rod, etc.; the first fixed beam and the second fixed beam are fixed, the movable beam and the outer sliding block are located between the first fixed beam and the second fixed beam, the first master cylinder, the perforating cylinder, and the second master cylinder are fixed on the second fixed beam, the perforating cylinder is located on the central axis, the first master cylinder and the second master cylinder are connected to the outer sliding block to drive the outer sliding block to move; the central sliding block is connected to the perforating cylinder; the turntable is installed on the first fixed beam, and the turntable is driven to rotate by a driving device; the rotating extrusion rod is fixed on the turntable, and the extrusion barrel is fixed on the movable beam; the positive extrusion rod is fixed on the outer sliding block; the hopper is located above the extrusion barrel; the perforating needle is connected to the perforating cylinder; the concave die is fixed on the rotating extrusion rod, and the punch is fixed on the perforating needle.

The invention relates to an intelligent control method and system for extrusion forming of an aluminum profile, and the method comprises the following steps: carrying out acoustic emission sensor array measurement and preprocessing on a mold inlet region of the aluminum profile in an extrusion process, and obtaining a preprocessed acoustic emission signal sequence; performing time-frequency domain energy distribution analysis on the acoustic emission spectrum to generate an acoustic emission energy spectrogram; carrying out material flow stability analysis based on the spectrogram to obtain a flow analysis result; if the flow instability degree exceeds the target stability range, multi-constraint optimization calculation is conducted on the main cylinder pressure and the extrusion speed based on the analysis result, and optimization control parameters are obtained; and finally, closed-loop feedback control is performed on the extruder through a distributed PID controller, so that the material flow stability is kept in a target range, intelligent high-precision forming control is realized, and the problem that in the traditional extrusion process, the material flow stability is often influenced by factors such as the extrusion speed, the main cylinder pressure and the mold design is solved. And a flow instability phenomenon is easy to occur.

A hybrid flute for a stalk roll may be configured with a sharp edge positioned between a first blunt edge and a second blunt edge along a length of the flute edge. The flute edge may extend radially outward from a main cylinder of the stalk roll. The flute edge may be engaged with a radius at the base of the flute edge, and a flute base may extend from the radius. A plurality of flute bases positioned adjacent to one another may be configured to form a main cylinder for the stalk roll. Wherein the main cylinder and one or more support members are formed of separable halves, the support members comprising inside planar surfaces for attachment to a square drive shaft.

A brake system for hydraulically actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a master cylinder fluidly connected to a reservoir and operable to provide a brake signal responsive to actuation of a brake pedal connected thereto. The master cylinder is selectively operable during a manual push-through mode by actuation of the brake pedal to generate brake actuating pressure at an output for hydraulically actuating a selected one of the pair of front and rear wheel brakes. A first power transmission unit is configured for actuating the selected one of the pair of front and rear wheel brakes. A second power transmission unit is configured for actuating the other one of the pair of front and rear wheel brakes. A first electronic control unit is provided for controlling at least one of the first and second power transmission units.

The invention relates to a brake pedal system, in particular to a master cylinder simulation brake pedal system and a control method. Comprising a mounting frame and a pedal body, the pedal body is rotatably mounted on the mounting frame, the pedal feeling simulator is arranged on the mounting frame, the pedal stroke sensor is mounted on the side, close to a pedal, of the mounting frame, and the pedal stroke sensor is mounted on the side, close to the pedal, of the mounting frame. The travel data acquisition module is connected with a pedal travel sensor, the analysis and calculation module is connected with the travel data acquisition module, the brake execution module is connected with the analysis and calculation module, and the brake intention of a driver can be input to a whole vehicle electronic control unit to wake up an EMB system by means of a sensor on a pedal. Therefore, decoupling between braking input and braking output is truly achieved, and comfortable feedback force is provided for a driver when the driver conducts pedal braking operation.

Disclosed herein is a hydraulic unit of a brake system. The hydraulic unit in accordance with the present embodiment may include a hydraulic block including a cylinder bore provided with a master cylinder connected to a brake pedal, a motor bore provided with a motor that generates hydraulic pressure by operating by an electrical signal output corresponding to displacement of the brake pedal, a hydraulic flow path, and a valve bore provided with a valve that controls a flow of a pressurized medium through the hydraulic flow path and an electronic control unit configured to control operation of the motor and the valve based on information on the displacement of the brake pedal.

A brake system for a vehicle include first brake devices respectively provided in two vehicle wheels of a vehicle and configured to perform a braking operation by transmitted liquid pressure, second brake devices respectively provided in the other two vehicle wheels of the vehicle and configured to perform a braking operation by an embedded second electromechanical actuator, a reservoir, a master cylinder including a master chamber, and a master piston provided in the master chamber, a hydraulic actuator configured to generate the liquid pressure by an electrical signal outputted in response to a displacement amount of the brake pedal, a hydraulic circuit configured to control the liquid pressure to be transmitted to the first brake device, and an electronic control unit configured to control the first electromechanical actuator, the hydraulic actuator, and the hydraulic circuit so that the first brake device and the second brake device generate braking forces.

An electric hydraulic brake includes: wheel brakes configured to braking force to wheels of a vehicle; a reservoir storing brake oil; a master cylinder connected to the reservoir, and operated in conjunction with a main brake motor to generate pressure of the brake oil; a first controller configured to control the main brake motor; a hydraulic controller including a pump configured to form pressure of the brake oil in conjunction with an auxiliary brake motor, and a hydraulic block configured to selectively transmit the pressure of the brake oil formed in the master cylinder or the pump to the wheel brakes; and a second controller configured to control the auxiliary brake motor when the master cylinder or the first controller malfunctions. The hydraulic controller is provided with an auxiliary flow path to transmit the brake oil from the reservoir to the pump directly through the auxiliary flow path.

The invention discloses a vehicle brake boosting system control method, an ECU controller, a medium and a product, and relates to the field of data processing. The method is applied to an ECU controller of a vehicle brake booster system and comprises the steps that target brake pressure is determined according to the displacement and speed of a brake pedal, and then the feed-forward target position of a master cylinder push rod is calculated; acquiring actual pressure through a pressure sensor, and comparing the actual pressure with target pressure to determine a corrected target position so as to obtain a final target position; calculating a feed-forward target current of the power-assisted motor according to the final target position; and acquiring an actual position signal by using a motor angle sensor, comparing the actual position signal with a final target position, determining a corrected target current, finally determining and conveying the final target current to a power-assisted motor, and driving a main cylinder push rod to apply braking force. The stability and reliability of the braking system can be improved, and therefore the braking performance and safety of the vehicle are improved.

Braking system with: a hydraulic brake device for generating a friction braking force comprising a pedal (16), at least one brake caliper (21a - 21d) a main pressure generating device (200) with a main cylinder (212) and a piston (251) which pressurizes the main cylinder (212), a wheel pressure generating device (300) for generating a hydraulic pressure in the at least one brake caliper (21a - 21d); and a regenerative braking device (18) and a brake control device (100) for calculating a braking force distribution between friction brakes and regenerative braking, wherein the braking system is configured to adjust a total braking force (Ft) based on a pedal reaction force and a displacement amount of the piston (251) that pressurizes the master cylinder (212), or adjust the total braking force (Ft) based on the pedal reaction force and the generated hydraulic pressure in the at least one brake caliper (21a - 21d) to keep the total braking force (Ft) at a constant level when transitioning from regenerative braking to friction braking in response to a reduction in vehicle speed.

The embodiment of the invention provides a hydraulic coupling type electronic hydraulic braking system and method and a vehicle, and relates to the field of vehicle braking, the system comprises a mechanical braking module, a first braking module, a second braking module, an isolation valve, an oil can module and a wheel end module, and the mechanical braking module is connected with the oil can module and the wheel end module; the first braking module is connected with the oil can module, the mechanical braking module and the wheel end module. The second brake module is connected with the mechanical brake module, the first brake module and the wheel end module, the mechanical brake module comprises a two-position three-way valve, a pedal simulation module and a main cylinder, the two-position three-way valve is connected with the main cylinder and the pedal simulation module, the two-position three-way valve is connected with the wheel end module, one end of the isolation valve is connected with the two-position three-way valve, and the other end of the isolation valve is connected with the pedal simulation module. The other end of the isolation valve is connected with the first brake module, isolation of the pedal simulation module and the first brake module is achieved, the first brake loop and the second brake loop are isolated through the isolation valve, and therefore the stable redundancy capacity is ensured.

The utility model discloses a hydraulic control system, which relates to the technical field of hydraulic control and comprises an oil tank, a hydraulic pump, a main cylinder, a first electromagnetic plug-in mounting direction valve, a second electromagnetic plug-in mounting direction valve and a third electromagnetic plug-in mounting direction valve. The main oil supply path is communicated with a rapid cavity of the main cylinder through a first electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with a lower cavity of the main cylinder through a second electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with an upper cavity of the main cylinder through a third electromagnetic plug-in mounting direction valve, and the upper cavity, the lower cavity and the rapid cavity of the main cylinder are all communicated with an oil tank through an oil return path; sliding valve control of a conventional hydraulic machine is replaced by cartridge valve control, the hydraulic machine is simple in structure and stable in performance, can be widely applied to the fields of game coins, souvenir medal, medal and the like, brings considerable benefits, and can adjust the drift diameter of corresponding cartridge valve combination parts according to actual conditions so as to improve the application range.

The utility model discloses a driverless formula car braking system, including adjustable slide rail, brake pedal and brake actuating mechanism, adjustable slide rail is provided with foot support, first base and second base in proper order, brake pedal bottom is connected with first base through brake stay bar, brake stay bar one end is connected with first base, brake stay bar one end is connected with second base, brake stay bar one end is connected with second base, brake stay bar one end is connected with second base, brake stay bar one end is connected with the brake actuating mechanism. The other end is connected with the brake actuating mechanism; the brake executing mechanism is connected with the second base through a mounting support, the brake supporting rod is connected with two brake main cylinders through a brake balance rod arranged in a penetrating mode, and a brake air cylinder is arranged below the foot support and located at the bottom of the brake balance rod. According to the unmanned formula car braking system, a manned mode braking system and an unmanned mode braking system are designed to be connected in parallel, normal braking and emergency braking are freely switched under the unmanned condition, mutual interference is avoided in the mechanical structure, the positions of pedals and sliding rails are adjustable, all parts are modularly designed, and the braking system is convenient to use and easy to popularize. Disassembly and assembly are convenient, and the driving experience of a driver is high.

A control device includes a housing having a base portion and an extension portion. The base portion of the housing has an inward facing side and an outward facing side. The control device includes a lever coupled to and pivotable relative to the housing, and a master cylinder portion supported by the housing. The master cylinder portion has a hollow fluid cylinder. The control device also includes a piston assembly supported by the housing. The piston assembly is movable relative to the master cylinder portion. At least part of the piston assembly is disposed within the master cylinder portion. The master cylinder portion is angled relative to the outward facing side of the base portion of the housing, such that the first end of the fluid cylinder is closer to the outward facing side than the second end of the fluid cylinder is relative to the outward facing side.

The present disclosure in some embodiments provides an oil reservoir assembly for a vehicle, the assembly comprising: a first oil reservoir formed with an outlet; a second oil reservoir spaced apart from the first oil reservoir in a lateral direction and in front of the vehicle, in fluid communication with a master cylinder, and having an inlet; a connecting member connecting the outlet and the inlet to convey a working fluid from the first oil reservoir to the second oil reservoir and a first rib located inside the second oil reservoir, extending from an upper surface of the second oil reservoir and parallel to a longitudinal direction of the vehicle, and extending in a first direction of the inlet.

The invention relates to a brake master cylinder, a brake assembly and a vehicle, the brake master cylinder comprises a cylinder body, a piston and a displacement sensor, the piston extends into the cylinder body and is slidably connected with the cylinder body, the displacement sensor comprises a displacement generator and a displacement receiver, the displacement generator is fixed in the piston and is used for transmitting signals, the displacement receiver is fixed relative to the cylinder body, and the displacement receiver is used for receiving the signals. And the sensor is used for receiving signals of the displacement generator to detect the sliding displacement of the piston relative to the cylinder body. The displacement generator in the displacement sensor is directly fixed in the piston, so that the design of an additional connection structure between the displacement generator and the cylinder body can be omitted, the matching error can be reduced, the displacement between the piston and the displacement generator is favorably limited, the displacement generator is prevented from shaking, and the reliability of the displacement sensor is improved. Therefore, the uniformity of multiple emission signals of the displacement generator in the reciprocating motion process of the piston is ensured, and the detection precision of the displacement sensor is improved. In addition, the displacement generator is contained in the piston, so that the space layout of the brake master cylinder is facilitated.

The invention discloses an automobile brake master pump, which comprises a brake pump assembly, a first piston and a second piston, the brake pump assembly comprises a main cylinder, a first piston and a second piston, the main cylinder is provided with an end A and an end B, the first piston is adjacent to the end A, the second piston is adjacent to the end B, a first sealing chamber is formed between the first piston and the second piston, and a second sealing chamber is formed between the second piston and the first sealing chamber. On one hand, the second sealing chamber is compressed to directly increase the pressure, on the other hand, fluid is supplemented to the first sealing chamber through the liquid inlet pipe, the hydraulic pressure of the first sealing chamber is forcibly increased, pressure loss caused by bubbles can be counteracted through superposition of the two, and it is ensured that the first branch pipe and the second branch pipe output enough braking force to the front and rear wheel calipers; brake failure or lag caused by moisture influence is avoided; the basic thrust applied by the push rod and the additional hydraulic increment generated by the electromagnet form a synergistic effect, and the pressure of the first sealing chamber and the second sealing chamber is remarkably amplified.

The invention provides a hydraulic brake system which comprises an oil can, a brake master cylinder, a pedal simulator, an electric supercharging device, a wheel brake unit, a brake pedal, a control unit and a backflow oil way, the two ends of the backflow oil way are connected with the oil can and a hydraulic cavity of the brake master cylinder respectively, and a backflow valve is arranged on the backflow oil way; the control unit is connected with the return valve and used for controlling opening and closing of the return valve according to the braking efficiency of the vehicle braking device during braking. When the backflow valve is opened, brake fluid in the hydraulic cavity of the brake master cylinder can flow back to the oil can through the backflow oil way. The hydraulic brake system can increase the stroke of the brake pedal when the brake efficiency of the vehicle brake device is attenuated, so that a driver can sense the attenuation of the brake efficiency. The invention further provides a vehicle.

The invention provides a braking system for an all-terrain vehicle and the all-terrain vehicle. The brake system comprises a brake starting assembly, a hydraulic control assembly and an electric control power assisting assembly. The brake starting assembly comprises a pedal mechanism and an angle sensor. The hydraulic control assembly comprises a main cylinder and a front left wheel brake, a rear right wheel brake, a front right wheel brake and a rear left wheel brake which are communicated with the main cylinder, the main cylinder comprises a piston rod, a first cavity and a second cavity, and the brake starting assembly is connected with the piston rod to drive the piston rod to stretch out and draw back; the electric control power assisting assembly comprises an energy storage unit, a motor and an electric control unit, the first cavity communicates with the front left wheel brake and the rear right wheel brake through the energy storage unit, and the second cavity communicates with the front right wheel brake and the rear left wheel brake through the energy storage unit; the braking system has the power assisting function and is compact in structure, the requirement for the installation space of the all-terrain vehicle is reduced, and the technical problem that drifting and sideslip are likely to happen in the braking process is solved.

The invention provides a distributed driving system structure of an electric transmission vehicle. The distributed driving system structure comprises a driving motor, a hub reduction gear, a brake disc, brake calipers, a pressure regulator, a master cylinder, a brake controller, a filter and a connecting flange plate. The output end of a driving motor of the driving system, a hub reduction gear and a brake are coaxially arranged. A double-motor double-side independent driving mode is adopted, motors with different power densities are reasonably selected, and wheel reducers are matched, so that the driving system works in a reasonable working range. The power output part, the brake disc and the brake calipers of the driving system are arranged outside the vehicle body, the wire outlet end of the driving motor, the water inlet and the water outlet and the like are arranged in the vehicle, the environmental adaptability of the braking device and the driving motor can be improved, and the characteristics of compact structure and small size are achieved.

The invention relates to the field of motorcycle braking systems, and discloses a motor-free motorcycle ABS system and a control method, the motor-free motorcycle ABS system comprises a negative pressure generation unit, a hand brake unit and a return valve; the system further comprises a pressure increasing valve, a pressure reducing valve, an energy accumulator and a braking unit. The hand brake unit is connected with the negative pressure generation unit, the hand brake unit comprises a main cylinder, the main cylinder provides high-pressure brake fluid for an ABS system, the main cylinder is connected with two oil ways, one oil way is communicated with an energy accumulator, the other oil way is communicated with the brake unit through a pressure increasing valve, and the other end of the negative pressure generation unit is connected with a return valve; the reflux valve is connected with the reducing valve; the pressure reducing valve and the pressure increasing valve are connected in parallel and then connected with the brake unit; the energy accumulator is connected between the hand brake unit and the pressure increasing valve through the one-way valve, and the energy accumulator is connected with the return valve and the pressure reducing valve. The brake system has the advantages of low cost, reliability in use and the like.

A control device includes a housing having a base portion and an extension portion. The base portion of the housing has an inward facing side and an outward facing side. The control device includes a lever coupled to and pivotable relative to the housing, and a master cylinder portion supported by the housing. The master cylinder portion has a hollow fluid cylinder. The control device also includes a piston assembly supported by the housing. The piston assembly is movable relative to the master cylinder portion. At least part of the piston assembly is disposed within the master cylinder portion. The master cylinder portion is angled relative to the outward facing side of the base portion of the housing, such that the first end of the fluid cylinder is closer to the outward facing side than the second end of the fluid cylinder is relative to the outward facing side.

The invention relates to an electric cylinder, in particular to a compact underwater electric cylinder. Comprising an execution assembly, a driving assembly and a transmission assembly, the execution assembly comprises a push rod and a lead screw, the driving assembly comprises a motor, and further comprises a main cylinder body and an end cover, a motor cavity and an execution cavity are formed in one end of the main cylinder body, the driving assembly is located in the motor cavity, and the execution assembly is located in the execution cavity; the rotating shaft of the motor is parallel to the axis of the motor chamber and deviates towards the direction of the execution chamber; and the end cover can seal the ports of the motor chamber and the execution chamber. According to the scheme, the compact underwater electric cylinder is compact in size and has excellent replaceability for an oil cylinder; and the device is light and small and can be used in a certain water area.

The present invention provides a wire-controlled braking device, including a pedal simulator, a shell, a master cylinder sub-assembly, a displacement sensor, a control unit and an electric power-assisting mechanism, wherein the pedal simulator includes a push rod and a pedal mounting seat; the master cylinder sub-assembly includes a master cylinder body, a master cylinder piston, a return spring and a master cylinder push rod; one end of the shell is connected to the pedal mounting seat, and the other end is connected to the master cylinder body, the lower end of the push rod is inserted into the cylindrical portion of the master cylinder push rod, the outer periphery of the cylindrical portion is provided with symmetrical axial sliding grooves and limiting bosses, and the rod-shaped portion of the master cylinder push rod is inserted into the master cylinder piston; the electric power-assisting mechanism includes a motor, a planetary gear set and a crankshaft-connecting rod slider structure that transmits to each other, the slider moves in the sliding groove of the master cylinder push rod and is respectively connected to the connecting rod, the other end of the connecting rod is movably connected to the crankshaft, the displacement sensor monitors the movement of the push rod and transmits the data to the control unit, the control unit controls the rotation or stop of the motor, and then acts on the master cylinder push rod through the crankshaft-connecting rod slider structure to achieve braking.