655 results about "Hydraulic brake" patented technology

The application discloses an intelligent electric chassis configuration and a fault-tolerant control method of the intelligent electric chassis, and relates to the technical field of electric chassis. The chassis configuration comprises a front axle centralized motor drive assembly, a rear axle distributed motor drive assembly, a front axle electronic hydraulic brake system, a rear axle electronic mechanical brake system and a chassis domain controller. The front axle centralized motor drive assembly comprises a centralized drive motor, a front wheel speed reducer and a drive half shaft which are sequentially connected. The rear axle distributed motor drive assembly comprises a left rear wheel end drive motor and a left rear wheel speed reducer which are sequentially connected, and a right rear wheel end drive motor and a right rear wheel speed reducer which are sequentially connected. The front axle electronic hydraulic brake system comprises a first main brake unit and a redundant brake unit. The rear axle electronic mechanical brake system comprises a second main brake unit. The chassis domain controller is used for controlling the centralized drive motor, the left and right rear wheel end drive motors, the first main brake unit, the redundant brake unit, the second main brake unit, a front axle steer-by-wire system, an intelligent suspension system and an intelligent tire. The application can improve the chassis safety and fault-tolerant capability to support high-level automatic driving functions.

The invention discloses a braking energy distribution method and system based on braking noise prediction and electronic equipment. The method comprises the steps that braking noise time sequence data, vehicle speed time sequence data, hydraulic braking torque time sequence data and pedal travel time sequence data of a current vehicle are obtained; inputting the braking noise time sequence data, the hydraulic braking torque time sequence data and the pedal travel time sequence data into a pre-trained braking noise prediction model to obtain a braking noise prediction value of the current vehicle after a preset time step; determining a corresponding braking noise threshold value according to the current working condition and the current driving mode of the current vehicle; and when the braking noise prediction value is larger than the braking noise threshold value, the braking energy distribution proportion is adjusted, so that the energy recovery torque is increased, and the hydraulic braking torque is reduced. According to the method, the braking noise of the vehicle is maintained below the threshold value through dynamic distribution of the braking energy, interference to users in the vehicle is avoided, the driving comfort of the vehicle is improved, and the method can be applied to the technical field of vehicle control.

The invention discloses an enhanced braking system for a mountain railway vehicle, which relates to the technical field of railway vehicle braking control, and comprises the following steps: acquiring a rail position vector and an arc length, calculating a rail curvature and a rail gradient, and combining the current speed and the target speed of the vehicle to solve a braking demand acceleration value and generate a gradient parameter and a curve parameter; according to the braking force distribution proportion, a wheel rail hydraulic braking torque value is adjusted, the meshing depth and the vibration frequency of a rack rail brake are controlled through a rack rail action instruction, and a wheel rail system state report and a rack rail work log are generated; and gradient parameters, actual adhesive force numerical values and toothed rail meshing efficiency in the braking process are extracted from a wheel-rail system state report and a toothed rail work log, and closed-loop optimization is carried out in combination with a terrain braking curve. Self-learning and self-adaptive adjustment are carried out on the braking process through closed-loop feedback and parameter optimization, so that the energy utilization efficiency is improved and the service life of key components is prolonged while the braking efficiency is guaranteed.

The invention belongs to the technical field of vehicle braking control, and provides a vehicle braking system failure auxiliary processing method, system and device and a medium. When the state is a non-failure state, executing a pressure building braking strategy; when the vehicle is in the failure state, an auxiliary processing strategy is executed, and the auxiliary processing strategy comprises the steps that the braking intention is judged based on vehicle braking feedback, and vehicle stability control threshold setting, deceleration distribution of electric braking and hydraulic braking, active adjustment of the braking pressure and active adjustment of the motor torque are sequentially completed based on the judgment result; and the wheel slip rate of the vehicle is monitored in real time, and the steering force of the vehicle is corrected in combination with vehicle braking feedback. While the deceleration of the vehicle meets the requirement of a driver, drifting or rollover of the vehicle due to the fact that the driver suddenly turns the steering wheel can be avoided, so that the stability of the vehicle is ensured.

A brake system for a vehicle may include at least two hydraulic brake circuits, each having at least one hydraulically acting wheel brake, at least two pressure supply devices, each of which is driven by an electromotive drive, at least one valve assembly having valves for the wheel-individual adjustment of brake pressures and / or for separating the wheel brakes from, or connecting same to, a pressure supply device, at least one electronic control and regulating unit, one of which is a superordinate central control unit that controls individual control and regulating units of the components of the brake system, as well as at least one additional electric drive motor for at least one axle or wheel of the vehicle. The brake system may use the at least one pressure supply device and / or the at least one electric drive motor for controlling pressure in at least one wheel brake for steering interventions.

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 an electronic pedal structure for brake-by-wire, which comprises a pedal support and a pedal arm rotationally connected to the pedal support through a pedal shaft, and further comprises a pedal simulator arranged below the pedal arm, the pedal simulator is provided with a central axis, and the pedal simulator can stretch out and draw back in the extending direction of the central axis. The two ends of the pedal simulator in the telescopic direction are flexibly connected with the pedal arm and the pedal support respectively, the pedal support is provided with a mounting face, the included angle between the mounting face and the central axis ranges from 80 degrees to 100 degrees, and projections of the pedal shaft and the pedal simulator on the plane where the mounting face is located are staggered. The height of the pedal support in the electronic pedal structure is small, so that the structural size of the pedal support is small; in addition, the electronic pedal structure and an original hydraulic brake pedal can be installed on an automobile in a replaceable mode, and therefore the transition requirement of the hydraulic pedal and the electronic pedal is met in stages.

A method, a device, a controller, and a computer program product for comfortable braking are disclosed. The method includes (i) determining a comfortable braking force based on an openness of a brake pedal of a vehicle, (ii) obtaining a current hydraulic braking force of the vehicle, (iii) requesting a drive force from a vehicle control unit in response to the hydraulic braking force being greater than the comfortable braking force, and (iv) performing comfortable braking on the vehicle based on the hydraulic braking force and the drive force. The above method enables the realization of the comfortable braking function with the participation of hydraulic brakes, which improves the flexibility of the comfortable braking by simultaneously utilizing the hydraulic braking force and the drive force, and expands the application scene of the comfortable braking, thereby improving the ride experience of drivers and passengers.

An oil pressure brake with a double-sealing structure comprises a brake pump body, a brake handle and an oil pipe assembly. The brake pump body is provided with a pressure cylinder and an oil storage cylinder, a piston push rod assembly acted by the brake handle is arranged in the pressure cylinder, and the pressure cylinder is communicated with the oil storage cylinder through an oil pressure adjusting hole. The piston push rod assembly comprises a front piston rod and a rear piston rod, a pushing cavity is formed in the rear piston rod, and the front piston rod can enter the pushing cavity; the front piston rod is provided with an oil guide cavity and an oil overflow hole; the front piston rod is further sleeved with a one-way piston oil seal, the one-way piston oil seal abuts against the inner wall of the pressure cylinder, and the one-way piston oil seal is located on the front side of the oil overflow hole. The hydraulic brake has the advantages that a new oil way is formed through the oil guide cavity and the oil overflow hole formed in the front piston rod, so that only one oil pressure adjusting hole is reserved between the pressure cylinder and the oil storage cylinder, only one one-way piston oil seal is used on the piston push rod assembly, and the brake use function can be achieved.

A brake system may include a plurality of wheel speed sensors respectively installed in a plurality of wheels of a vehicle, a plurality of hydraulic brake modules related to braking of the plurality of wheels, and a first controller configured to perform braking control on the plurality of hydraulic brake modules in response to at least one of a pedal displacement signal, which corresponds to a movement of a brake pedal, and wheel speed signals outputted from the wheel speed sensors, in which when a failure of the first controller is identified, a second controller, which is provided in a steering system of the vehicle, performs braking control on an electronic parking brake, which is provided in at least one of the plurality of wheels, in response to at least one of an operating signal of an EPB switch, the pedal displacement signal, and the wheel speed signals outputted from the wheel speed sensors.

The utility model relates to a mechanical and electrical integrated brake caliper. According to the technical scheme, the mechanical and electrical integrated brake caliper comprises a caliper body, two hydraulic brake pads and two motor brake pads. A mounting groove is formed in the calipers; the two hydraulic brake pads are slidably mounted on the two sides of one end of the mounting groove correspondingly. A hydraulic driving module is arranged on the calipers; the output end of the hydraulic driving module abuts against the two hydraulic brake pads. A motor driving module is further arranged on the calipers; one motor brake pad is fixedly mounted on one side of one end, far away from the hydraulic brake pad, of the mounting groove; the other motor brake pad is slidably mounted on the other side of the end, away from the hydraulic brake pad, of the mounting groove and abuts against the output end of the motor driving module. The brake caliper is stable in overall structure and convenient to install, a hydraulic caliper structure and an electronic caliper structure can be combined into a mechanical and electrical integrated brake caliper, and the integrated structure is higher in stability and safety; the space is saved, and meanwhile the parking effect is reserved.

A braking system for a motor vehicle has a plurality of hydraulic brake units for braking each braking one wheel of the motor vehicle and a first electric parking brake actuator for braking a first wheel and a second electric parking brake actuator for braking a second wheel. A first control device comprises a first hydraulic controller which is designed and set up to drive the plurality of hydraulic brake units. In order to ensure parking brake redundancy, the first control device has a driver for driving the first parking brake actuator. A second control device is also provided, which comprises a driver for driving the first parking brake actuator and a driver for driving the second parking brake actuator.

Disclosed are a hydraulic brake device, a hydraulic brake actuation device, and a two-wheeled vehicle. The hydraulic brake device comprises a cylinder body, a pushrod piston, and a return spring. One end of the pushrod piston moves back and forth within the cylinder body, overcoming the elastic force of the return spring. A pushrod head is provided at the other end of the pushrod piston.The hydraulic brake actuation device comprises a carrier, an actuating lever and the hydraulic brake device, wherein the actuating lever is rotatably connected to the carrier; the hydraulic brake device is symmetrically constructed and provided within the carrier; a drive rod is arranged on the carrier, wherein the head end of the drive rod is in contact with the actuating lever and the rear end of the drive rod is in contact with the hydraulic brake device; the drive rod serves to receive a drive force from the actuating lever.

The invention provides an energy recovery control method and device, a vehicle and a storage medium, and the method comprises the steps: monitoring the current driving working condition of the vehicle, and obtaining vehicle operation parameters, the current hydraulic braking force of vehicle braking and the current feedback braking force of a vehicle motor when the current driving working condition is a braking working condition; and the vehicle operation parameters, the current hydraulic braking force and the current feedback braking force are subjected to torque prediction through a pre-trained prediction model, target recovery torque is obtained, and a vehicle motor and a vehicle brake are controlled to output braking torque to a vehicle power system according to the target recovery torque. According to the method, it is monitored that the vehicle is in the braking working condition, the target recovery torque matched with the vehicle running parameters, the hydraulic braking force and the feedback braking force is rapidly and accurately predicted by combining the prediction model with the real-time vehicle running condition in time, cooperative control is conducted on a motor and braking through the recovery torque, and energy recovery with the maximum vehicle efficiency is achieved.

Disclosed are a bicycle hydraulic brake control device and a bicycle. The bicycle hydraulic brake control device includes: a control main body connected to a handlebar of a bicycle; a brake lever pivotally connected to an end of the control main body; a hydraulic cylinder connected to the control main body; a piston rod connected to the hydraulic cylinder; and a trigger member hinged to the control main body, wherein the trigger member includes a pressing portion and a pushing portion. In the brake control device, the piston rod is pushed by means of the rolling member to do a piston motion, so that hard friction between the trigger member and the piston rod is prevented to reduce the friction force between the trigger member and the piston rod and achieve a smooth hand feeling of braking, the braking effect is improved, and a rider's braking experience is also improved.

The stretching linkage equipment comprises a traction machine and the tension machine, the traction machine comprises a traction machine frame, a traction winding drum and a guide mechanism, the traction winding drum is installed on the traction machine frame, and the guide mechanism is arranged on the traction machine frame; the tension machine comprises a tension machine frame, an output shaft and a tension winding drum, the tension winding drum is rotationally arranged on the tension machine frame, and the output shaft is fixedly connected to the tension winding drum; a hydraulic resistance braking mechanism is fixedly arranged on the tension rack, and the hydraulic resistance braking mechanism is arranged on the output shaft in a sleeving manner; the tension machine further comprises a gear motor, and the gear motor is arranged on the tension machine frame. The hydraulic resistance braking mechanism comprises a liquid disc, a closed liquid cavity filled with magnetorheological fluid is arranged in the liquid disc, a resistance wheel set is arranged in the liquid cavity, and the resistance wheel set comprises a rotatable resistance blade and a motor; and a magnetic field regulation and control mechanism is arranged outside the liquid disc. The technical problem that hydraulic braking of existing stretching equipment fails is solved by integrating the hydraulic resistance braking mechanism and the magnetic domain regulation and control mechanism through the tensioner.

A stroke-adjustable oil pressure brake comprises a brake body, a piston rod, a handle and a transmission rod. The device further comprises a cylinder sleeve and an adjusting piece. The cylinder sleeve is movably arranged in the pressure cylinder, the cylinder sleeve at least has a first position state and a second position state relative to the pressure cylinder, and the movement of the cylinder sleeve can cause the piston rod to move relative to the pressure cylinder, so that the set initial position of the piston rod is changed; the adjusting part is movably connected to the brake body and comprises an operating end and an acting end, and the acting end of the adjusting part abuts against the cylinder sleeve; the adjusting piece acts on the cylinder sleeve to enable the cylinder sleeve to move, so that the transmission rod and the piston rod which are matched with the cylinder sleeve move along with the cylinder sleeve, the set initial position of the piston rod is changed, and the purpose of adjusting the idle stroke of the brake is achieved. Therefore, the matching relationship between the two is not changed.

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.

The utility model belongs to the technical field of hydraulic brake valves, and particularly relates to a hydraulic brake valve with an angle sensor, which comprises a mounting frame, a valve body is fixedly mounted on one side of the mounting frame, a slide valve cavity is arranged in the valve body, an output port communicated with the slide valve cavity is arranged above the valve body, and the angle sensor is arranged in the slide valve cavity. An input port communicated with the sliding valve cavity is formed in the side face, an oil return port communicated with the sliding valve cavity is formed below the sliding valve cavity, a valve element is slidably inserted in the sliding valve cavity, and the input port is formed between the output port and the oil return port; the other face of the mounting frame is movably connected with an operation panel, and a side frame is arranged on one side of the mounting frame. According to the novel automobile lamp, the stable adjusting control effect is achieved, the structure is compact, the braking effect is sensitive, a user can conduct fine adjustment according to needs through the operation panel, meanwhile, the angle sensor is arranged, the application scene that the new energy engineering automobile lamp needs signal feedback is met, and the user can know the adjusting control condition in real time.

The present invention belongs to the technical field of rail trains, and relates to a rail train hydraulic brake system slow-release device. The present invention also relates to a control method for a rail train hydraulic brake system slow-release device. A reversing valve module (A) includes a shuttle valve (1), a first pressure switch (2), and a second pressure switch (3). A manual pump module (B) includes a manual pump (4), an oil tank (5), and a pressure relief valve (6). The shuttle valve (1) is connected to the oil tank (5) through a first pipeline (7). A manual pump (4) is provided on the first pipeline (7). The shuttle valve (1) is connected to an auxiliary relief unit (9) through a second pipeline (8). The shuttle valve (1) is connected to a clamp (11) through a third pipeline (10). The first pipeline (7) is connected to the pressure relief valve (6). The rail train hydraulic brake system slow-release device of the present invention is easy to operate, can reliably complete relief and braking, effectively prevents the risks caused by misoperation and forgetting to restore the gear position, and reduces the probability of misactivation.

This invention relates to the field of vehicle technology, specifically providing a control method for a vehicle EPB system, aiming to solve the problem that existing vehicles struggle to brake according to different deceleration requirements when malfunctions or hydraulic braking modules fail. To this end, the vehicle EPB system of this invention includes a braking mechanism configured to clamp and release the vehicle's wheels; the control method includes: acquiring the vehicle's deceleration request; determining a target clamping force based on the acquired deceleration request; and controlling the braking mechanism to incrementally increase the clamping force until the clamping force reaches the target clamping force. The control method of this invention can brake the vehicle regardless of whether a malfunction occurs or the hydraulic braking module fails, with good braking effect, thus improving vehicle safety.

The utility model relates to a hydraulic braking system capable of realizing decompression braking and a tractor, the system comprises a left brake valve, a right brake valve and a decompression valve, and an oil outlet h on the decompression valve can be communicated with an oil inlet g or an oil return port i; the oil inlet g is communicated with one end of an oil inlet pipeline L5, and the oil return port i is communicated with one end of an oil return pipeline L6; the interface b on the left brake valve can be communicated with the interface a or the interface c; the oil outlet h is communicated with the interface c through a pipeline L1, and the interface a is communicated with the oil return pipeline L6 through a pipeline L2; the right brake valve is provided with an interface d, an interface e and an interface f, and the interface e can be communicated with the interface d or the interface f; the interface d is communicated with the pipeline L2 through a pipeline L3, and the interface f is communicated with the pipeline L1 through a pipeline L4. The single-side braking and double-side braking device is simple in structure, reasonable in design, capable of achieving free switching between single-side braking and double-side braking, capable of meeting different braking pressure requirements and convenient to use.

The invention relates to the technical field of motorized spindles, in particular to an end face type motorized spindle structure which comprises a box body, a spindle rotationally connected into the box body and a permanent magnet motor used for driving the spindle to rotate, and the permanent magnet motor is fixed to the end face located outside the box body. A left bearing and a right bearing are respectively fixed in the box body, and the main shaft is rotationally connected between the left bearing and the right bearing; a through hole is formed in the center of the spindle, a hollow pull rod is slidably connected into the through hole of the spindle, one end of the hollow pull rod is in threaded connection with a chuck, the other end of the hollow pull rod is in threaded connection with a rotary tensioning cylinder, a brake disc is fixed to the face, close to the permanent magnet motor, of the rotary tensioning cylinder, and a hydraulic brake used for braking the brake disc is arranged above the brake disc. A support is fixed above the box body, and the hydraulic brake is fixed on the support. Through external layout of the motor, the heat dissipation effect is improved, conduction of heat of the motor into the box body is reduced, and the service life of the main shaft and the bearing is prolonged; mounting and dismounting are convenient, and production efficiency is improved.

The invention discloses a parking braking mechanism of an electronic mechanical braking system. The parking braking mechanism comprises a valve block (1), a flange plate (2), a speed reducing mechanism module (3), a hydraulic cylinder body module (4), a simulator cylinder body (5), an ECU controller (6), a driving motor module (7) and a liquid storage tank (8). According to the parking braking mechanism of the electronic mechanical braking system, modular design is adopted, the machining difficulty of a single assembly is greatly reduced, the process assemblability is optimized, the assembly flexibility of a production line is improved, and the assembly process is simpler and more reliable.

Method for estimating the coefficient of friction of a hydraulic brake system with axle-specific pressure build-up of a motor vehicle, comprising the steps: a) Adjusting a braking torque on a wheel of a first axle or on a first axle of the motor vehicle via an actuator system which has a higher positioning accuracy than the hydraulic braking system; b) Measurement of the deceleration of the wheel or axle or motor vehicle caused by the braking torque; c) Determination of the transmission behavior between braking torque and deceleration of the wheel or axle or motor vehicle; d) Applying a target braking torque to the wheel or axle of the motor vehicle via the hydraulic braking system; e) Measurement of the deceleration of the wheel or axle or motor vehicle caused by the braking torque; f) Estimating the actual braking torque via the inverse of the transmission behavior between braking torque and deceleration of the wheel or axle or motor vehicle determined in step c); (g) Calculation of the coefficient of friction of the hydraulic brake system with axle-specific pressure build-up for the first axle of the motor vehicle, wherein the method also includes the determination of the coefficient of friction of the hydraulic brake system with axle-specific pressure build-up for at least one further axle of the motor vehicle.

Brake caliper (1) for a hydraulic disc brake, designed to enable the production of both radially and axially mounted hydraulic disc brakes for passenger cars, commercial vehicles and armored vehicles using a general forming pattern and general machining equipment, comprising the following: - an inner brake caliper half (1.1) configured to allow both radial and axial connection by machining hydraulic brake discs (1) with a radial connection; - Connection points ( 1.1.1) having an elliptical shape, which enables the machining of the inner brake caliper half (1.1) for both a radial and an axial connection from the same forming part; - rear extensions of connecting elements (1.1.6) that extend from the connecting elements (1.1.1) and structurally connect the inner brake caliper half (1.1) to the piston housings (1.1.2) and the connecting bolt extensions (1.1.3) through the forming surfaces.

The utility model discloses a floating type hydraulic brake, which relates to the field of hydraulic brakes and comprises a main mounting plate, the top surface of the main mounting plate is vertically, downwards and symmetrically welded with supporting vertical rods, the top ends of the supporting vertical rods are horizontally and fixedly welded with an auxiliary top plate, and the top surfaces of the main mounting plate and the auxiliary top plate are symmetrically provided with mounting through holes. Fixed top blocks are symmetrically welded to the top face of the main mounting plate, an overturning arc rod is vertically arranged on the side edge between the fixed top blocks, a fixed paired block is in butt joint with the inner side edge of the overturning arc rod, a brake pad is fixedly arranged on one side edge of the fixed paired block, and a limiting top rod is fixedly connected to the top end of the overturning arc rod. Auxiliary side rods are horizontally and symmetrically arranged on the two side edges of the overturning arc rod, multiple limiting and guiding structures are adopted, so that the situation of deflection and dislocation is not likely to be formed when the overturning arc rod is used for braking, and the situation of shaking is avoided when the overturning arc rod is installed and used for braking through the fixing and limiting structures on the upper face and the lower face.

The invention discloses a passive undercarriage braking system and method for an eVTOL aircraft. The system comprises a front undercarriage, a main undercarriage and a braking system. In the braking system, a comprehensive controller is used for receiving a braking fault signal sent by a braking controller, an emergency braking fault signal sent by a passive emergency braking control valve unit and a braking instruction signal sent by a ground work station, and normal braking or emergency braking is judged to be executed; when it is judged that normal braking is executed, a braking instruction signal is sent to a braking controller so as to control a left airplane wheel and a right airplane wheel to execute normal braking through a left airplane wheel braking control channel and a right airplane wheel braking control channel; and when it is judged that emergency braking is executed, a braking instruction signal is sent to the passive emergency braking control valve unit so as to control the left airplane wheel and the right airplane wheel to execute emergency braking through the emergency braking control channel. The problem that when an existing hydraulic brake system is applied to an eVTOL aircraft, the unique operation requirement of the eVTOL cannot be met is solved.

Brake lever arrangement for a hydraulic brake device (1) with a brake lever (2) for actuating a hydraulic piston (20), with a pivot axis (4) via which the brake lever (2) can be pivotably attached to a housing (6), with an actuator (10) which can be pivotably attached to the housing (6) about the pivot axis (4), wherein the actuator (10) is designed and arranged such that the piston (20) can be actuated by the brake lever (2) via this actuator, and can be supported on the housing (6) or on the piston (20) by a torsion spring (16) which is mounted on the pivot axis (4) and acts on the brake lever (2) with a spring force in the direction of actuation.