83results about How to "Meet braking needs" patented technology

The invention provides a braking force compensation method under an air brake fault condition. The braking force compensation method is used for judging whether or not the brake level is lower than the value of a largest common braking force of a preset proportion when a carriage brake system of a city rail train fails so that air brake cannot be applied, if yes, air brake in the failed carriage is alleviated, and the other normal carriages compensate the braking force loss of the failed carriage so that the braking force requirement of the whole train can be met; if no, the failed carriage applies emergency brake on the whole train to compensate the braking force loss so that the whole train can meet the brake requirement. The compensation method makes the braking force of the train meet the brake requirement, removes hidden safety hazards, and does not influence operation of a driver and line operation.

The invention discloses an electric vehicle energy recovery method comprising the following steps: the step S1 of controlling a vehicle to uniformly decelerate at constant deceleration according to the pre-calibrated energy recovery torque in the first stage of vehicle energy recovery; the step S2 of stepping on a brake pedal to trigger the second stage of the energy recovery under the condition that the conditions of the first stage of the vehicle energy recovery are met; the step S3 of presetting the brake pedal stroke threshold in the second stage of energy recovery; when the brake pedal stroke is greater than the stroke threshold, the mechanical brake is applied; when the brake pedal stroke is less than the stroke threshold, the energy recovery torque is adjusted according to the stroke of the brake pedal. The method has the advantage that the pedal stroke is set to the idle stroke in the second stage of the energy recovery, where the mechanical brake is not applied, and the energyrecovery distortion is adjusted according to the actual pedal opening degree to improve the energy recovery torque, increase the brake and maximize the energy recovery while the brake demand is met.

The invention provides an electric vehicle regenerative braking energy coordinated recovery control method, which is based on a pure electric vehicle brake-by-wire system, and the energy is recoveredunder the coordinated control of the hydraulic braking torque of the brake-by-wire system and the feedback torque of a driving motor; the method comprises the following steps: 1, establishing a regenerative braking control system model; 2, modeling a driving motor and a battery; 3, designing a vehicle braking energy recovery controller; 4, selecting a control quantity and finishing control. According to the method, a regenerative braking control system model based on model predictive control is established; a brake energy recovery controller is designed; the hydraulic braking torque of the electro-hydraulic braking system and the feedback torque of the driving motor are selected as input of the controller, the hydraulic braking torque and the feedback torque of the driving motor are distributed in a coordinated mode to realize maximum braking energy recovery, such that the braking smoothness is guaranteed, the braking requirement of a driver is met, meanwhile, the front-back slippage rate is as small as possible, and the braking safety is guaranteed.

The invention discloses an electric servo brake device with various working modes. A shell is connected with an end cap, a cavity is formed between the shell and the end cap, a ball screw is mounted at the center of the cavity, a transmission mechanism is connected with the ball screw and used for outputting torque to drive a brake main cylinder to realize servo braking, a piston of the brake maincylinder is mounted in the shell, and the piston is pushed in a braking direction through a pushing mechanism which is connected with a pedal mechanism. The electric servo brake device has the advantages that the electric servo brake device is supportive of brake energy recycling, and a small-stroke line control function of the device can ensure maximization of brake energy recycling in most working conditions; when a corner sensor connected with a pedal or a corner sensor connected with the ball screw fails, the two corner sensors can be strategically switched to determine power assistance,so that reliability of the brake device is improved, and the brake device works in various working modes; the brake device has a failure backup manual brake function, so that brake needs under different working conditions are met.

The invention discloses an electro-hydraulic combined braking system with a retardance braking function. The electro-hydraulic combined braking system comprises a hydraulic braking subsystem, a motor braking subsystem and a control subsystem. The hydraulic braking subsystem is composed of a hydraulic regulator, an electronic braking pedal, a braking line and a double-disc brake. The motor braking subsystem is composed of a power battery, a DC / AC converter, a power line and a motor. The control subsystem comprises an electronic control unit and a signal line. The electro-hydraulic combined braking system with the retardance braking function can provide three braking modes, namely, the motor braking mode, the retardance braking mode and the hydraulic braking mode; under the condition that the maximum braking torque output in motor braking is limited by the performance of the power battery, the retardance braking mode is used for replacing the motor braking mode to meet the braking requirement of a driver, so that the use frequency of the hydraulic braking mode is effectively reduced, and braking dust pollution and braking noise pollution are effectively reduced.

The invention belongs to the technical field of braking, and particularly relates to a double-sided progressive double brake system. The system comprises a first brake mechanism, a connecting plate, aU-shaped support and a second brake mechanism, wherein the first brake mechanism is connected with an automobile hydraulic system. When the hydraulic system pushes the first brake mechanism to move toward a first brake disc, the first brake mechanism drives the second brake mechanism to move toward a third brake disc through a first gear mechanism; a first brake pad and the first brake disc firstgenerate friction, and light brake braking starts. The first brake pad continues to push a first brake disc mechanism to slide along a rotating shaft; the first brake disc mechanism drives a second brake disc mechanism to move to a second brake pad through a corresponding second gear mechanism, the second brake mechanism continues to move to the third brake disc and catches up with the third brake disc, then the second brake disc and the second brake disc generate friction, a third brake pad catches up with the third brake disc to generate friction, and the hard brake braking starts.

The invention discloses a hybrid power tractor brake system with a retarder. The hybrid power tractor brake system with the retarder comprises an engine, a clutch, a motor, a transmission, a retarder, a retarder handle, a hybrid power controller, an air cylinder, a brake valve, a first gas pressure sensor, a second gas pressure sensor, an electric valve, a brake chamber and a brake pedal which are arranged on a tractor, wherein the engine is connected with the motor through the clutch, the motor is connected with the transmission, the transmission is in serious with the retarder, the brake pedal is connected with the brake valve, the air cylinder , the brake valve, the electric valve and the brake chamber are sequentially connected through a pneumatic pipeline, the first gas pressure sensor is mounted in the pneumatic pipeline at the rear of the brake valve , and the second gas pressure sensor is mounted in the pneumatic pipeline at the rear of the electric valve. The invention further discloses a control method of the hybrid power tractor brake system. The hybrid power tractor brake system can recycle brake energy as much as possible while meeting brake requirements of a driver, and thus oil consumption of the whole tractor is reduced.

The invention discloses a control method of the maximum energy recovery when an electric vehicle brakes and belongs to the technical field of electric vehicles. The control method is characterized by comprising the following steps that (1), a calculation decision module of a vehicle control unit calculates needed brake torque according to the current state of the vehicle and the current road state, and the obtained brake torque is analyzed and processed according to the following situations; (2), according to the analysis result, through the coordinated logic control over the brake torque according to the brake process, the control over the maximum energy recovery when the electric vehicle brakes is finished finally. According to the control method of the maximum energy recovery when the electric vehicle brakes, the utilization rate of recovered energy of the electric vehicle is improved to be 50% from 20%, the driving range is increased by 75%, and the safety performance is ensured when the electric vehicle brakes; the road state can be sensed dynamically, the brake requirement by a driver is met in real time, the brake torque is adjusted, the brake requirement of the vehicle is met, and safety is ensured.

The invention relates to an electro-hydraulic composite braking system hierarchical control structure and method suitable for an integrated braking cylinder. The hierarchical control structure comprises an upper layer electro-hydraulic composite braking control unit and a lower layer hydraulic control unit. The upper layer electro-hydraulic composite braking control unit is in communication with the lower layer hydraulic control unit through a whole vehicle control system, the current running state of a vehicle is obtained, braking force distribution and stability control are achieved, needed wheel cylinder target pressure is sent to a lower layer hydraulic adjusting unit for real-time adjusting, and wheel cylinder practical pressure is sent to the upper layer electro-hydraulic composite braking control unit. Control system modularization is achieved, hierarchical design is achieved, software and hardware independent design, debugging, installing and testing are convenient, vehicle stability control can be integrated, the structure can be combined with regeneration braking to form an electro-hydraulic composite braking system, and the structure and the method can be widely suitable for braking systems of a pure electric vehicle, a hybrid power vehicle and a fuel cell vehicle.

The invention discloses a regenerated braking energy recovery optimization method and system for a hybrid power tramcar. According to an operation characteristic curve of the fuel cell hybrid power tramcar and a mechanical characteristic curve of a traction motor, braking operation control optimization of a driving mode is set, electric braking force is fully utilized, and braking energy feedbackis maximized; and then, by optimizing energy management strategies, output distribution of all power supplies is controlled, and braking energy recovery is maximized. According to the regenerated braking energy recovery optimization method and system for the hybrid power tramcar, stable braking and braking energy recovery are achieved while it is ensured that a fuel cell hybrid power system supplies electricity to the load of the tramcar reliably; under the premise of ensuring the braking property of the system, braking optimization of combination of feedback braking, energy consumption braking and mechanical braking is achieved, braking energy recovery is maximized as much as possible, the fuel utilization rate is increased, and the purpose of fuel economy is achieved; and braking noise is reduced, emission is reduced, the service life of an energy storage device is prolonged, the operating cost is reduced, and the braking safety of the tramcar is improved.

The invention discloses an air brake pressure control system and a brake control method. The system comprises an air inflation electromagnetic valve, an exhaust electromagnetic valve, a pressure sensor, a detection module, a pressure control unit and a controller, wherein controller comprises a learning record module and an abnormal control module. According to the brake control method, a synchronous learning and a recording control strategy of the learning record module is utilized, when signals of the pressure sensor are abnormal, the abnormal control module calls the control strategy of thelearning record module, and the air inflation electromagnetic valve or the exhaust electromagnetic valve is controlled to gradually reach the target pressure according to the corresponding control strategy. Compared with a certain fixed state that a control electromagnetic valve is in the normal power or normal power loss, the pressure of a pressure chamber to be controlled is more accurate.

The invention discloses a copper-based powder metallurgical friction material for brake. The copper-based powder metallurgical friction material mainly comprises the following components of 50 to 55%of Cu (copper), 1 to 2% of Ni (nickel), 1.5 to 2.5% of Sn (selenium), 16 to 20% of Fe (iron), 2 to 4% of Cr (chromium), 3 to 4.5% of Mo (molybdenum), 2 to 3% of W (tungsten), 1 to 1.5% of MgO (magnesium oxide), 1 to 1.5% of ZrO2 (zirconium dioxide), 0.5 to 1% of MoO3 (molybdenum trioxide), 1.5 to 2.5% of Ti (titanium), and 9 to 13% of C (carbon). The copper-based powder metallurgical friction material has the advantages that by adopting the particular design on proportional ratio of raw materials and components, the comprehensive property is excellent; the brake requirement of a high-speed train can be met, and the use and maintenance cost of the high-speed train is reduced.

The invention provides a multifunctional dual-motor redundancy brake system and a control method. The brake system mainly comprises a brake pedal assembly, a main electro-hydraulic servo brake assembly, an auxiliary electro-hydraulic servo brake assembly, a liquid storage tank, a parallel main cylinder, a brake main cylinder, a hydraulic adjusting unit and a brake set. The two sides of the main electro-hydraulic servo brake assembly are connected with the brake pedal and the parallel connection main cylinder respectively. The auxiliary electro-hydraulic servo assembly is connected with a brake master cylinder, and the mechanical assembly is provided with a self-locking mechanism and can achieve power-off locking. An oil outlet of the brake master cylinder is connected with two oil inlets of the parallel brake master cylinder through two loops respectively, and two oil outlets of the parallel brake master cylinder are connected with a left oil inlet and a right oil inlet of the pressure adjusting unit through the two loops respectively. According to the brake system, multiple working modes such as brake-by-wire brake with brake keeping, external request brake, brake energy recovery assistance and manpower backup brake can be achieved, multiple redundant brake modes are achieved, the brake requirement of a high-tonnage vehicle can be met, and the safety of the vehicle is improved.

The invention discloses an intelligent automobile composite line control braking system and a braking control method thereof. The braking system combines a mechanical electric control braking system with an integrated motor type electric control braking system and is independently controlled by an electronic control unit. An electromechanical braking (EMB) module consists of two brakes. An integrated motor type electric control braking IBS module consists of an integrated motor, a ball screw mechanism and a braking pressure generation unit. The ball screw mechanism is fixedly connected to theinterior of a rotor of the integrated motor, and the rotor transmits power to an output push rod of the braking pressure generation unit through the ball screw mechanism. Two inner cavities of a maincylinder of the braking pressure generation unit generate braking pressure under the push of the output push rod, and braking control over two braking wheel cylinders is achieved through electromagnetic valves. The mechanical electric control braking system is combined with the integrated motor type electric control braking system, the problems of a single braking system are solved to achieve rapid pressure generation and precise pressure control, and braking under multiple conditions can be achieved.

The invention relates to a hydraulic retarder and engine exhaust combined brake control method. The method comprises the steps that signals are collected through a signal port of a hardware circuit; whether the vehicle speed value is less than 5 Km / h or not is judged, and if yes, output of exhaust brake is closed; if not, whether brake gear input exists or not is judged, and if not, output of exhaust brake is closed; if yes, whether an input gear is a constant-speed gear or not is judged, and if yes, a constant-speed gear control sub-process is executed; if not, whether the retarder is at hightemperature or not is judged, and if yes, engine brake is started, and the retarder performs limited-torque output; if not, whether the retarder works at a highest gear, namely a fourth gear or not is judged, and if yes, the engine exhaust brake operation is started; if not, the engine exhaust brake is kept in an original state; the hydraulic retarder is output according to a normal gear; and thestep 1 is repeated, and the steps are carried out sequentially in a cyclic mode so as to form a control closed loop.

The invention discloses an electromagnetic eddy current braking device, and belongs to the technical field of high speed train braking. The electromagnetic eddy current braking device is composed of a magnet exciting coil unit, lifting devices, braking force transferring devices, gap adjusting devices and supporting plate devices. According to the electromagnetic eddy current braking device, the structure of the device is novel, the operating principle is clear, the magnet exciting unit is utilized to provide stable and reliable braking force, and iron cores and magnet yokes adopt integrated modeling; the lifting devices are utilized to bear the resultant force of brake gravity and electromagnetic attraction, air cylinders have high impact resistance, and dual hinges enable pistons of the air cylinders to only bear the force in the direction perpendicular to a rail; the braking force transferring devices are utilized to transfer the braking force horizontally on the rail surface to a bogie, lifting and lowering of the brake are not affected, and supporting rod structures only bear the horizontal force and can move in the vertical direction freely; the gap adjusting devices are utilized to adjust the size of gaps, the space occupied by the gap adjusting devices is small, and the gap adjusting operation is easy; and the supporting plate devices are utilized to provide support for the lifting devices and the braking force transferring devices, and the whole device is safe and reliable.

A locomotive brake control system comprises a brake cylinder pipe, a master air cylinder pipe, a first pressure valve and a primary control unit, wherein that primary control unit control the brake cylinder pipe and the master air cylinder pipe to communicate with each other through the first pressure valve; Also included is a secondary control unit that controls communication between the brake cylinder pipe and the master cylinder pipe via the second pressure valve, the control pressure of the second pressure valve being greater than the control pressure of the first pressure valve. A locomotive brake control system Two-stage braking is provided, and the braking force of two-stage braking is different. In the process of locomotive running, the first-stage braking is generally adopted. Ifthe first-stage braking cannot meet the braking demand of locomotive, the second-stage braking can be adopted, which can increase the braking capacity of locomotive in a short time and ensure the braking safety of locomotive. The invention also discloses a rail vehicle comprising the brake control system of the locomotive.

The invention provides an electric vehicle sliding control method and system, and a storage medium, and the method comprises the steps: responding to a driving state signal that a vehicle enters a sliding condition, and obtaining a preset sliding recovery level and the current driving speed of the vehicle; determining a target deceleration of the automobile according to the current driving speed and a preset sliding recovery grade; obtaining a target braking force of the automobile according to the current driving speed and the target deceleration; distributing the target braking force into target electric braking force and target hydraulic braking force; and obtaining the actual deceleration of the automobile under the target braking force, and compensating the target braking force according to the actual deceleration and the target deceleration to obtain the compensated target braking force. According to the method, the closed-loop control scheme with the target deceleration as the control target under the sliding working condition of the vehicle is achieved, and the deceleration of the vehicle can reach the real target deceleration.

The invention discloses an intelligent image analysis system of a railway goods inspection robot. A robot erected beside a railway rail slides on a customized rail for routing inspection, and the appearance state and the cargo loading state of a freight boxcar are collected in real time, wherein the appearance state and the cargo loading state include the appearance damage, the physical deformation, the sealing state and the like, and the data is transmitted to a station intelligent analysis terminal through a station WIFI, a 5G technology or a wired transmission mode, so that the inspection content and an inspection result during the cargo inspection process are presented in real time. By combining the information, such as the cargo inspection professional inspection standard, the normalappearance state of the cargo boxcar, etc., through a rear-end image analysis software, and by means of a machine learning algorithm and the model comparison, the functions of automatic inspection, fault warning, early warning and the like of the appearance state and the cargo loading state of the cargo boxcar, are achieved.

The invention discloses an engineering vehicle chassis brake control system and a crane, and relates to the technical field of engineering vehicles. The technical problem that braking capacity in the prior art is poor is solved. The engineering vehicle chassis brake control system comprises a foot brake valve, a first foot relay valve, a three-shaft left brake chamber, a three-shaft right brake chamber and a first air tank, and an air inlet of the first foot relay valve is communicated with an air outlet of the first air tank. One of two air outlets of the first foot relay valve is communicated with a travelling brake airflow inlet of the three-shaft left brake chamber. The other of the two air outlets of the first foot relay valve is communicated with a travelling brake airflow inlet of the three-shaft right brake chamber. The crane comprises a rear axle brake air path, and the rear axle brake air path comprises the engineering vehicle chassis brake control system. The engineering vehicle chassis brake control system and the crane are used for improving the brake performance of the chassis brake control system of the crane.

The invention relates to the technical field of automobiles, in particular to a steep slope slow descent control method, a system, a vehicle and a storage medium. The steep slope slow descent control method comprises the following steps: S1, calculating state parameters of the vehicle to obtain the mass of the whole vehicle, the gradient of a vehicle driving road and the friction coefficient of a brake disc; recognizing a driving system and a braking system for speed reduction, and determining normal working boundaries of braking of the driving system and the braking system; s2, whether the steep slope slow descent function needs to be started or not is judged, and if yes, the next step is executed; s3, setting an expected vehicle speed; s4, obtaining expected acceleration according to the difference value between the expected vehicle speed and the actual vehicle speed, and determining the whole vehicle braking torque corresponding to the current expected acceleration; and S5, distributing the braking torque of the whole vehicle. According to the invention, the braking torque can be reasonably distributed, and the driving safety is ensured.

The invention discloses a two-stage hill-holding system and a vehicle. The two-stage hill-holding system comprises a two-stage hill-holding manual valve which has a first driving state, a parking state and a temporary parking state; a parking brake subsystem which comprises a first relay valve and a spring brake cylinder; and a temporary stop function subsystem which comprises a second relay valve and a brake air chamber; When the two-stage hill-holding manual valve is switched from the first driving state to the parking state, the two-stage hill-holding manual valve controls the first relay valve to enable the spring brake cylinder to exhaust air, and a parking braking function is achieved. When the two-stage hill-holding manual valve is switched from the parking state to the temporary parking state, the two-stage hill-holding manual valve controls the first relay valve to enable the spring brake cylinder to exhaust air, and controls the second relay valve to inflate the brake air chamber, and the parking brake function and the temporary parking function are achieved. The working states of the parking braking subsystem and the temporary parking function subsystem are controlled through the three states of the two-stage slope parking manual valve, and when a vehicle is parked on a slope, the two subsystems work at the same time to improve the slope parking capacity.

The invention provides an electro-hydraulic composite brake anti-lock braking system and a control method thereof. The system comprises a hydraulic brake actuating mechanism, a motor brake actuating mechanism and an environment sensing and control decision mechanism, the control mode of the hydraulic brake actuating mechanism is a three-channel type rear axle low-selection ABS, and according to different road conditions, the motor brake actuating mechanism adopts different control modes, and is combined with the hydraulic brake actuating mechanism to perform alternate compensation to brake wheels. The motor brake actuating mechanism plays a role in rapid adjustment and accurate adjustment in the whole regulation and control process, and the hydraulic brake actuating mechanism plays a rolein providing large torque. The pavement adhesive force is utilized to the maximum extent, and the respective advantages of a motor and the hydraulic actuating mechanism are combined to meet the braking requirements under different working conditions.

The invention discloses an electric forklift driving system which comprises a wet-type mechanical brake driving system and an electromagnetic brake driving system, the wet-type mechanical brake driving system comprises a reduction gearbox and a motor, and the reduction gearbox comprises a wet-type mechanical brake system, a first-stage speed reducer, a second-stage speed reducer and an axle. Through meshing transmission of a helical gear of primary speed reduction and meshing transmission of a planetary gear train of secondary speed reduction of the reduction gearbox, high efficiency and low noise are achieved, meanwhile, integrated design of wet mechanical braking is achieved, and through the design of increasing or reducing friction plates, the braking requirements of electric forklifts of different tonnages are met, the universal design of wet-type mechanical brake components such as a brake rod and a pressing plate is achieved, the purpose of saving cost is achieved, the design of different versions of wet-type mechanical brake and electromagnetic brake of a driving system is achieved by changing the output shaft of the motor, and the requirements of different clients are met.

The invention relates to an automobile air rotary compression energy storage type braking system and belongs to the technical field of automobile control. The system mainly comprises a sliding vane type air compression device, a pedal and angle displacement inductor, an electromagnetic clutch, a pressure feedback transducer, a voltage comparator, an electromagnetic valve, a low-pressure air inflow device, a high-pressure air inflow device, a buffer box and an air storage tank. By the adoption of the system, force is acquired from rotation of an axle in the automobile braking process, the sliding vane type air compression device installed in the position of a brake disc is driven, air compression energy storage is conducted, power is adjusted and controlled by adjusting the initial pressure of air before the air is compressed, high-intensity air compression is achieved, and the large counter torque is output to stop an automobile from moving forwards continuously. By the adoption of the automobile air rotary compression energy storage type braking system, energy can be recycled and stored immediately under the common braking condition, braking operation is conducted on the brake disc through small-size high-intensity rotary air compression design, the system accords with a traditional braking operation habit, and the safety performance and the economic performance of the air rotary compression energy storage type braking system are improved.

The invention provides a parallel type hydraulic braking energy recovery system. Three energy accumulators with different initial pressures are used as accumulators; and the three energy accumulatorsare in a parallel state. During braking, the energy accumulators are selected according to different working conditions; when the braking strength of a vehicle is high, the high pressure energy accumulator works, and one part with insufficient braking force is supplemented by a friction brake; when the regenerative braking moment, which can be provided by the high pressure energy accumulator, reaches a required vehicle braking moment, the high pressure energy accumulator is closed, and the middle pressure energy accumulator begins to work; and when the braking strength of the vehicle is low, the low pressure energy accumulator works, and a desired braking moment of the vehicle is provided by the hydraulic braking energy recovery system.

The invention provides a multifunctional shuttle valve type dual-motor redundancy braking system and a control method thereof. The braking system mainly comprises a brake pedal assembly, a main electro-hydraulic servo brake assembly, an auxiliary electro-hydraulic servo brake assembly, a shuttle valve, a hydraulic control unit and a brake set. Wherein the main electro-hydraulic servo brake assembly is connected with the brake pedal, and the main electro-hydraulic servo brake assembly and the auxiliary electro-hydraulic servo brake assembly are in communication connection. A front cavity of a main brake master cylinder is directly connected to one oil inlet of the hydraulic control unit through a first loop, a rear cavity of the main brake master cylinder and an auxiliary brake master cylinder are connected to two oil inlets of the shuttle valve through a second loop and a third loop respectively, and an oil outlet of the shuttle valve is connected with the other oil inlet of the hydraulic control unit through a fourth loop. The hydraulic control unit is connected to the brake set through a brake pipeline. The system can meet the requirement of servo braking of vehicles with high design tonnage, and has the advantages of being compact in structure, convenient to arrange, optimal in braking pressure distribution and the like.

The invention discloses an electric vehicle brake vacuum pump working time prediction system which comprises an information collection module and a prediction module which are in communication connection. The information collection module is used for collecting the total braking frequency of a whole vehicle, the total starting frequency of the whole vehicle, the braking deceleration probability distribution, the initial vacuum degree of a braking vacuum pump and the starting vacuum degree of the braking vacuum pump in the life cycle of the whole vehicle; the prediction module comprises a braking hydraulic pressure probability distribution module, a braking frequency module, a starting frequency module and a working time module. The invention further provides a prediction method based on the prediction system. Information collected by the information collection module is transmitted to the prediction module, so that the total working time of the brake vacuum pump is predicted. The prediction result is high in accuracy, and the braking design requirement is met; the development period is shortened.

The invention belongs to the technical field of engines, and particularly relates to a supercharger control method and system. The supercharger control method comprises the following steps of judgingwhether a vehicle is in a braking state or not, controlling a supercharger to adopt a first closed-loop control strategy according to the braking state of the vehicle, and controlling the superchargerto adopt a second closed-loop control strategy according to the condition that the vehicle is in the non-braking state. According to the supercharger control method, an open-loop control strategy adopted by the supercharger in the prior art is changed into a closed-loop control strategy, so that the opening degree of the supercharger can be changed along with the working condition of the vehicleto meet the braking requirement of the vehicle, and the braking capacity of the vehicle is improved.

The invention discloses a decoupling type electric power-assisted brake device which comprises a box body, a pedal foot feeling simulation mechanism, a transmission mechanism, an anti-rotation mechanism, a brake master cylinder, an angle sensor, a motor and a pedal. The rotation angle change of the pedal is fed back to the brake control system through the angle sensor, the motor is controlled to work, the motor drives the transmission mechanism to rotate synchronously and axially pushes the anti-rotation mechanism through the transmission mechanism, and the brake master cylinder is pushed through parts in the anti-rotation mechanism to complete braking. The pedal foot feeling simulation mechanism penetrates through the transmission mechanism, a decoupling gap is formed between the pedal foot feeling simulation mechanism and the anti-rotation mechanism, the pedal foot feeling simulation mechanism can eliminate the decoupling gap and directly push the anti-rotation mechanism in the axial direction, and failure emergency braking is completed by pushing the brake master cylinder through parts in the anti-rotation mechanism. The layout mode of electric power assisting and pedal force decoupling is adopted, the foot feeling is comfortable, and safety and reliability are achieved; the device has the advantages of being simple in structure, fast in response, low in noise and the like, and automatic braking in automatic driving is met.