631 results about "Master cylinder" patented technology

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 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.

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.

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 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 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 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 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.

A control device mountable to a handlebar of a bicycle includes a housing, 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 fluid cylinder. The fluid cylinder has a first end and a second end opposite the first end with a cylindrical wall therebetween. An opening extends through the master cylinder portion, from the first end to the second end. The control device also includes a plug removably connected to the master cylinder portion via the opening at the first end of the fluid cylinder, and a piston assembly supported by the housing. The piston assembly is movable relative to the master cylinder portion. The housing is made of a first material, and the master cylinder portion is made of a second material. The second material is different than the first material.

The invention belongs to the technical field of mining machinery automation control, and relates to a hydraulic support multi-objective optimization control method for temporary support of mine roadway tunneling, which comprises the following steps: constructing a state vector and a continuous state equation of a hydraulic support system and discretizing to obtain a discrete state space model; displacement and pressure synchronous tracking of the hydraulic support system is taken as a target, a model prediction controller is adopted to carry out rolling optimization search of a control quantity under a variable constraint condition, an expansion state observer is combined to estimate total disturbance of the hydraulic support system in real time, the total disturbance is fed forward and compensated into the model prediction controller, and a final control quantity is generated; and constructing an asymmetric coupling synchronous network by taking the master cylinder as a benchmark, and forming cooperative control of the master cylinder and the slave cylinder by adopting a synchronous deviation mechanism and a final control quantity to finish multi-objective optimization control of the hydraulic support. According to the invention, safe, efficient, stable and energy-saving accurate control of a single hydraulic column and multi-target cooperative control of pump-controlled multiple hydraulic columns can be realized.

The invention relates to a rear cover assembly structure and method for a line control brake system and a master cylinder assembly. The rear cover assembling structure comprises a main cylinder, a rear cover and a steel wire clamping ring. A main cylinder hole is formed in one end of the main cylinder, the inner diameter of the main cylinder hole is gradually reduced from outside to inside, and a first annular groove is concavely formed in the inner side wall of the main cylinder hole; the rear cover is embedded in the main cylinder hole, and the outer side wall of the rear cover is matched with the inner side wall of the main cylinder hole; a second annular groove and a mounting groove are further formed in the outer side wall of the rear cover, and the mounting groove is used for mounting an O-shaped ring. A main cylinder and a rear cover are fixed through a steel wire clamping ring, a first annular groove is formed in a cylinder hole of the main cylinder, a second annular groove is synchronously formed in the outer circle of the rear cover, after assembly, one part of the steel wire clamping ring can be clamped in the first annular groove of the cylinder hole of the main cylinder, and the other part of the steel wire clamping ring can be clamped in the second annular groove in the outer circle of the rear cover. And the axial fixation between the rear cover and the main cylinder is realized.

The invention discloses a hydraulic machine with a movable upper workbench, which relates to the technical field of hydraulic machines and comprises a lower beam, a stand column, a sliding block, a main cylinder, the upper workbench, an upper platform and an upper balance cylinder. The device has the effects of reducing the weight of the upper workbench and moving the upper workbench, three sets of bevel gear boxes are arranged at the top end of the upper workbench, and the two sets of bevel gear boxes at the front end and the rear end are connected with worm gear cases through couplings and second dowel bars, so that the worm gear cases can move along four sets of stand columns; the working stroke of the upper workbench can be effectively shortened, the working efficiency is improved, the adjusting mechanism is arranged at the middle end of the bottom of the upper workbench, the adjusting mechanism comprises a cavity, a telescopic mechanism, a rotating mechanism, a bottom plate and other assemblies, the bottom plate on the bottom face of the upper workbench can be rotated, and the angle of the bottom plate can be adjusted; and machining of special workpieces is facilitated, the flexibility can be effectively improved, and the manufacturing cost is reduced.

The invention provides a reverse pull rod center valve type hydraulic brake master cylinder, which is characterized in that a secondary piston and a primary piston are arranged in a cylinder body and are connected through a spring and a connecting rod; a reverse pull rod center valve type device serves as a core, is composed of a return spring, a pull rod, a valve seat, a sealing spring and the like and is of a plane sealing structure. The master cylinder solves the problems that a traditional brake master cylinder is lagged in response and unstable in braking. During braking, the push rod pushes the piston, the valve type device rapidly closes the channel, and high pressure is established to achieve braking. And braking is relieved, the piston resets under the action of the spring, the channel is opened, and oil flows back. The brake device has the advantages of high response speed, good sealing performance, efficient space utilization, low cost, stable and safe braking and the like, and meets the performance improvement requirement of a brake system.

Vehicle braking system, comprising: a master cylinder (15) adapted to be actuated by a brake pedal (11) and to receive a supply of brake fluid from a reservoir (16); an input sensor (11a) for detecting an operation of the brake pedal (11); a motor-operated cylinder (13) adapted to be actuated by an electric motor (12) in accordance with a control signal and to receive a supply of brake fluid from the reservoir (16); a solenoid shut-off valve (24a, 24b) provided with a fluid line (22c, 22d) between the master cylinder (15) and the motor-operated cylinder (13), the solenoid shut-off valve (24a, 24b) comprising: a piston (32) provided with a valve element (31), a valve seat (34) provided in a housing of the solenoid shut-off valve (24a, 24b) and adapted to cooperate with the valve element (31), a return spring (35) urging the piston (32) in a valve-opening direction, a solenoid (33) for actuating the piston (32) in a valve-closing direction upon energization, and a stopper (36) for mechanically limiting a stroke of the piston (32) in the valve-opening direction; and a control unit (6) for providing the control signal to the motor-operated cylinder (13) according to a detection signal from the input sensor (11a) and for closing the solenoid shut-off valve (24a, 24b) when the motor-operated cylinder (13) is actuated in response to the detection signal from the input sensor (11a), characterized by that the control unit (6) is arranged to control electrical power supplied to the solenoid (33) in order to slow down a movement of the piston (32) when the piston (32) reaches a point which is immediately adjacent to at least one of the stopper (36) or the valve seat (34), and that the control unit (6) supplies electrical power to the solenoid (33) at a first level (D2), a second level (D3) which is lower than the first level (D2), and a third level (D1) which is between the first level (D2) and the second level (D3), in this order, when the piston (32) is actuated in the valve closing direction, so that the solenoid shut-off valve (24a, 24b) is held in a fully closed state by the solenoid (33) which is excited by the electrical power at the third level (D1) against a biasing force of the return spring (35).

The application discloses a kind of hoses and oil pipe assembly for automobile ABS brake master cylinder, belong to automobile parts technical field.Hose for automobile ABS brake master cylinder includes in turn from inside to outside: inner rubber layer, intermediate framework layer and outer rubber layer;The rubber of inner rubber layer includes: EPDM raw rubber, liquid ethylene-propylene rubber, carbon black N550, white carbon black, antioxidant 445, stearic acid, 14-40B and crosslinking aid TAIC;Intermediate framework layer is made of yarn knitting;The rubber of outer rubber layer includes: EPDM raw rubber, white carbon black, carbon black N550, stearic acid, zinc oxide, insoluble sulfur, accelerator TBZTD and phenolic adhesive resin.The application is applied to the aspect of automobile ABS brake master cylinder connecting pipe, solve the problem that existing ABS brake master cylinder oil pipe for automobile is strong, loud noise, with high temperature resistance, high pressure resistance, good bending resistance, reduce noise characteristics.

The present invention provides a vehicle braking system and a vehicle. The vehicle braking system (1) comprises a brake fluid control assembly (100), connecting oil pipes (300), and a brake master cylinder assembly (200). The brake fluid control assembly comprises an oil circuit block (110) and a pressure booster (120). The pressure booster is mounted on the oil circuit block. Oil circuit block ports (111) are provided on the side of the oil circuit block, and one end of each connecting oil pipe is connected to an oil circuit block port, and the brake master cylinder assembly and the brake fluid control assembly are arranged separately. Assembly ports (210) are provided on the outer circumferential surface of the brake master cylinder assembly, and the other end of each connecting oil pipe is connected to an assembly port. The brake master cylinder assembly communicates with the brake fluid control assembly by connecting oil pipes, and both the brake master cylinder assembly and the pressure booster can be driven to output brake fluid from the oil circuit block.

The invention relates to an anti-lock device (1) for a wheel, which is arranged in a hydraulic pressure circuit between a master cylinder (2) and at least one brake caliper (3) of the wheel, in particular for an aircraft. According to the invention, the device comprises: a centrifugal element (4) attached to a rim (5) of the wheel and movable from a retracted position when the wheel is rotated at a speed below a threshold rotational speed to a deployed position due to centrifugal force when the wheel is rotated at a speed beyond the threshold rotational speed; a pressure regulating system (6) comprising a hydraulic inlet (6a) connected to the master cylinder (2) and a hydraulic outlet (6b) connected to the hydraulic inlet of the brake caliper (3), the pressure regulating system (6) is movable between a hydraulic circuit closed position when the centrifugal element (4) is in the retracted position and a hydraulic circuit open position driven by the centrifugal element (4) in the deployed position.

The invention relates to an EMB structure capable of achieving mechanical pressurization and pressure relief backup, and belongs to the field of automobile brake-by-wire systems. A main cylinder structure is inserted into a transmission mechanism of an EMB and a pedal simulator structure, when an EMB motor rotates, a push rod pushes a piston to compress oil in a main cylinder, then a caliper piston is pushed to achieve clamping of calipers, and meanwhile an oil outlet hole is reserved in the main cylinder of the EMB and connected to a main cylinder of the pedal simulator. Through opening and closing of the electromagnetic valve and plugging and communication of an oil return hole in the pedal simulator structure, the functions of mechanical backup and emergency pressure relief of braking force are achieved, and the safety redundancy of vehicle braking is greatly improved. Efficient electric control braking, failure redundancy and safe pressure relief are achieved in a single structure, and the reliability is remarkably improved.

The invention discloses a brake master cylinder pressure prediction method based on an MAML-AUKF model, and relates to the field of man-machine co-driving. The method comprises the following steps: constructing an MAML-AUKF model; dividing the brake master cylinder pressure prediction task into a plurality of meta learning tasks according to the driver brake deceleration peak value; leg sEMG signals and brake master cylinder pressure in the process that a driver steps on a brake pedal are obtained, a data set is established, and the data set is divided into a support set and a query set of different tasks according to a preset proportion; based on the support sets of different tasks, parameter updating of the AUKF model is realized through internal loop training of the MAML-AUKF model; based on query sets of different tasks, parameter updating of the AUKF model is achieved through outer loop training of the MAML-AUKF model; and collecting a real-time sEMG signal data set of a driver, and inputting the real-time sEMG signal data set into the AUKF model trained and updated by the MAML method to predict the pressure of the brake master cylinder. The method can adapt to the noise condition of frequent change of sEMG signals, and the robustness and generalization ability of the AUKF model in prediction of brake master cylinder pressure filtering are improved.

The application provides a vehicle coasting safety early warning method and system based on millimeter wave radar evaluation detection, and belongs to the technical field of vehicle braking control; the method comprises the following steps: when a vehicle is in a potential coasting working condition, a millimeter wave radar is activated to detect an obstacle behind the vehicle, and a relative distance and a relative speed are obtained; a micro-motion feature accumulation analysis is performed on a return signal to identify the type of the obstacle; a dynamic risk evaluation factor is calculated according to the relative distance, the relative speed and the type of the obstacle, and when the dynamic risk evaluation factor exceeds a threshold value, a hierarchical early warning is performed; and a driver intention recognition model is constructed through a negative correlation between a brake master cylinder pressure change rate and the relative speed to inhibit false early warning. The application can effectively distinguish between static obstacles and dynamic obstacles while avoiding misjudgment of the driver intention, and thus ensures the accuracy and intelligent level of the coasting early warning.

The utility model provides a kind of brake master cylinder machining positioning jig, it is related to positioning tooling technical field, including bottom plate, first positioning block, second positioning block and first pressure cylinder are set on bottom plate, first positioning block is opened with U-shaped gap, second positioning block is in convex type, first pressure cylinder is set in the side of second positioning block away from first positioning block, the piston rod of first pressure cylinder sets first pressing block. When using, one end of pump body is placed in U-shaped gap, and the middle position of pump body is placed in second positioning block, control first pressure cylinder to press pump body in first positioning block, i.

The present invention belongs to the technical field of extrusion hydraulic presses, and specifically discloses a large-scale long-cylinder multi-station horizontal extrusion hydraulic press, comprising a base, a column, a front beam, a rear beam, a slider, a return cylinder, a main cylinder, a punch assembly, and a die assembly; the column is fixed between the front beam and the rear beam; the main cylinder and the return cylinder are used to drive the slider to reciprocate; the punch assembly comprises a punch structure, a slide, a slide, and a punch switching cylinder, the slide is fixed on the slider, and the punch switching cylinder is fixed on the slide; the punch structure is arranged on the slide; the slide is vertically slidably connected to the slide; the punch structure comprises a roughing punch and a stretching punch; the punch switching cylinder is used to drive the slide to move vertically; the die assembly comprises a stretching die and a clamping die structure, and the clamping die structure is used to install the stretching die. By providing a roughing punch and a stretching punch, and using a punch switching cylinder to drive the roughing punch and the stretching punch to move vertically, the corresponding punches are moved to the working position, thereby realizing a rapid conversion of the roughing or extrusion process.

An ABS device for a hydraulic braking system of a bicycle or motorcycle, in particular for bicycles, comprises an electrically actuated valve unit (13) which is switchable between a first operating state in which a master cylinder (2) associated with a brake lever is in contact with an actuating cylinder (3) of a brake device and a second operating state in which the connection is interrupted and the actuating cylinder (3) of the brake device is in contact with a fluid accumulator (9).An electronic control (E) is designed to control the position of the moving element (11) of the fluid accumulator (9) both during activation of the ABS function and during deactivation of the ABS function in order to effect: a non-abrupt, but progressive, change in the pressure (CP) in the line (8) connected to the actuating cylinder (3) of the brake device (F), as a function of the rotational speed (ω) of the wheel (R1) to which the brake device is assigned, and as a function of a second parameter, which is the pressure (CP) in the actuating cylinder (3) of the brake device or the deceleration of the vehicle, which is detected or calculated from a sensor assigned to the vehicle.

A hydraulic disc braking system is disclosed. The system has a manually operated control device for a cyclist to issue a braking command. The system has a master cylinder assembly having a membrane dividing the hydraulic fluid tank into a variable volume filled chamber and a complementarily variable volume empty chamber. A membrane detector senses the presence of the membrane relative to a predetermined position in the tank and / or a meter measures the distance of the membrane from the ceiling of tank.

Hydraulic unit of an electronically controlled brake system, comprising a modulator block (80) with several receiving bores (164, 181 to 185) in which several valves (64, 81 to 84) and pressure sensors (85a, 85b) coupled to a master cylinder (20) are installed to control hydraulic brake pressure supplied to vehicle wheels, wherein passages (180) connecting the receiving bores are formed in the modulator block (80) and the passages (180) are formed such that they are divided into two layers (P1, P2), wherein the receiving bores (164, 181 to 185), in which an inlet valve (81), an outlet valve (82), a start valve (83), a simulation valve (64), a pressure sensor (85a, 85b) and a switching valve (84) are installed, are formed in one surface of the modulator block (80) and the receiving bore (186), in which a shut-off valve (86) is installed, is formed in the other surface of the modulator block (80), wherein the multiple receiving bores (164, 181 to 185) formed in a surface of the modulator block (80) have installed the inlet valve (81), the outlet valve (82), the start valve (83), the simulation valve (64), the pressure sensors (85a, 85b) and the switching valve (84) in this order.