345 results about "Air brake" patented technology

The embodiment of the invention discloses a braking force distribution method and device for chassis control of an unmanned vehicle. The method comprises the steps that according to an acceleration instruction, a vehicle dynamics model and a PI controller are applied to obtain required torque; determining whether the vehicle is in a driving mode or a braking mode according to the required torque; and if it is determined that the vehicle is in a braking mode, according to the required torque, under the criterion of feeding back electric energy as much as possible, an electric braking torque instruction and an air braking reference value are obtained, the air braking reference value is adjusted based on control parameters adjusted by a neural network, and an air braking instruction is obtained. By means of the mode, on the premise that the maximum electric braking is guaranteed, the rapidity and accuracy of braking distribution and composite braking are improved, and meanwhile the accuracy and real-time performance of pneumatic braking are improved.

The invention relates to the technical field of new energy vehicles, and particularly discloses a control method, system and device for steep slope slow descent of an electric vehicle and a storage medium, and the method comprises the steps that a vehicle control unit calculates the required torque value of the vehicle at the actual vehicle speed based on the current gear, the actual vehicle speed, the slope, the vehicle mass and the state of a power battery; sending a negative torque request to the motor based on the demand torque value; the state of the vehicle is monitored, when it is monitored that the current state of the vehicle meets the preset abrupt slope slow descent function condition, according to the met abrupt slope slow descent function condition, the motor torque and air brake synergistic effect are dynamically adjusted based on the negative torque request, and the cruise switch of the abrupt slope slow descent function is controlled; therefore, the vehicle can run at a constant speed under the downhill road condition. According to the scheme, the abrupt slope slow descent function of the vehicle is controlled, potential safety hazards when the vehicle is driven on a high-speed downhill road section are avoided, and the safety of the whole vehicle is effectively improved.

The invention relates to the technical field of train operation optimization, and discloses an air braking efficiency uncertainty-oriented freight train operation optimization method, which comprises the following steps of: generating a state value function approximate value and a working condition selection set by adopting a constraint-based state value function table learning algorithm according to an initial state and a disturbance sampling value of a freight train; according to the state value function approximate value and the working condition selection set, a state value function table approximate algorithm based on operation time estimation is adopted to generate an operation time approximate value and an operation time estimation value; and according to the operation time approximate value and the operation time estimated value, a freight train operation sequence meeting the air braking constraint, the speed limit constraint and the operation time limit is generated by adopting an operation optimization algorithm meeting the time constraint. According to the method, the freight train operation sequence meeting various constraints can be calculated in a short time, meanwhile, the influence caused by uncertain disturbance is reduced, and the overall optimization effect of the calculation result is improved.

The invention provides a hydrogen fuel electric light truck whole truck structure. The hydrogen fuel electric light truck whole truck structure comprises a cab, a container, a truck frame, a hydraulic tail plate system, a hydrogen system, an electric system, a cooling system and an air brake system. The hydraulic tail plate system comprises a hydraulic tail plate, a hydraulic tail plate oil original tank, a hydraulic tail plate controller and a hydraulic tail plate cross beam; the hydrogen system comprises a hydrogen fuel electric pile, a left hydrogen storage tank, a right hydrogen storage tank, an air inlet air filter and an exhaust silencer; the power system comprises a battery pack, an all-in-one unit, a DCDC, a DCAC, a PTC, a hydrogen stack high-voltage box, a battery high-voltage box, a charging port and a low-voltage power supply unit; the cooling system comprises a high-pressure radiator, a low-pressure radiator, a low-pressure radiator water replenishing tank, a high-pressure radiator water replenishing tank, an air conditioner condenser, an air conditioner electric compressor and an integrated kettle; the air brake system comprises an inflating pump, a drying tank, a lower air cylinder, an upper air cylinder, a front axle and an electric drive axle. The layout of the whole truck can be optimized, so that the hydrogen fuel electric light truck can be compatible with an air brake and a hydraulic tail plate.

The invention discloses a pressure-limiting valve seat, a pressure-limiting valve assembly, a valve group module and an air braking system. The pressure-limiting valve seat comprises a valve seat base body, and the valve seat base body is provided with a first valve cavity, a second valve cavity and a third valve cavity which are independent of one another; the brake cylinder interface and the sensing valve lower cavity interface are communicated with the first valve cavity, the pressure reduction air cylinder interface and the sensing valve upper cavity interface are communicated with the second valve cavity, and the control valve interface is communicated with the third valve cavity; the valve seat base body is further provided with a pressure limiting valve connector used for being connected with a pressure limiting valve, and the pressure limiting valve connector communicates with the first valve cavity, the second valve cavity and the third valve cavity in a one-to-one correspondence mode. The brake cylinder connector, the sensing valve lower cavity connector and one of the pressure limiting valve connectors communicate with the first valve cavity, so that when a corresponding valve port of the pressure limiting valve communicates with the pressure limiting valve connector, the pressure limiting valve can communicate with the brake cylinder connector and the sensing valve lower cavity connector at the same time through the first valve cavity; therefore, the pressure limiting valve can be communicated with the brake cylinder and the sensing valve lower cavity of the sensing valve at the same time.

The invention discloses an anti-folding brake control method for a new energy tractor and a trailer, and belongs to the technical field of new energy vehicle braking. The method specifically comprises the steps that when braking is light braking, a tractor only starts electric braking, and a trailer starts slight air braking; when the braking is heavier braking, except for starting electric braking, all pneumatic brakes of the tractor provide corresponding braking air pressure according to calibration parameters, and the trailer provides corresponding pneumatic braking air pressure according to loads; when the braking is emergency braking, different braking air pressures are provided for each pneumatic brake of the tractor and the trailer according to pre-calibrated parameters, and then automatic adjustment is carried out according to wheel speed signals of all vehicles and signals fed back by a vehicle body stabilizing system. The braking force redistribution method is simple and is not limited by whether the trailer is provided with a power battery or not, the braking stability of the vehicle can be guaranteed, the kinetic energy of the vehicle can be recycled to the maximum extent, and the economical efficiency of the vehicle is improved.

The invention relates to the technical field of thread rolling machining, and discloses penetrating rod thread rolling equipment for an automobile air brake, the penetrating rod thread rolling equipment comprises a plurality of sets of thread rolling mechanisms which are sequentially connected in series, and each thread rolling mechanism comprises a feeding assembly, a thread rolling machining assembly, a discharging assembly, a feeding assembly and a detecting assembly; the detection module is used for detecting materials, the discharging module is used for discharging unqualified materials, and qualified materials can enter a thread rolling station; the thread rolling machining assembly is used for conducting thread rolling machining on the materials at the thread rolling station. The hopper in the subsequent thread rolling mechanism is in butt joint with the discharging assembly in the previous thread rolling mechanism. Three sections of threads are machined at a time by splicing the three thread rolling mechanisms, automatic conveying is achieved between the adjacent thread rolling mechanisms, materials do not need to be manually conveyed in sequence, the production efficiency is remarkably improved, and manual intervention is reduced; before entering the thread rolling process, the penetrating rod is subjected to at least one detection, defective products are eliminated, and the production requirements of high-precision parts are met.

The utility model discloses a composite cabin ventilation system meeting dynamic positioning redundancy requirements, which comprises an exhaust shutter, an air inlet shutter and a fan which are positioned in an upper cabin, a structural air duct positioned in a middle cabin and a diesel generator set positioned in a lower cabin, and the air inlet shutter, the fan, the structural air duct and a cavity of the lower cabin are sequentially communicated. The cavity of the lower-layer cabin is communicated to an exhaust shutter through a chimney; and an air brake for controlling the ventilation quantity is arranged between the fan and the structural air duct. According to the utility model, a water cooling mode is utilized to completely replace the heat dissipation air volume of a main part during the design of a conventional cabin ventilation system, and the discharge capacity of a ventilation fan and the size of an air duct are reduced. The internal circulation cooling jet fan does not need to be started, normal operation of the ship can be guaranteed through the frequency conversion fans with the small number and power, and energy conservation and emission reduction are achieved. All the frequency conversion fans and the internal circulation cooling jet fans can work at the same time, the use requirements of tropical areas under extremely hot working conditions are met, and the working condition adaptability of ships is improved.

The invention provides a freight train air-power joint multi-target manipulation optimization method, and relates to the technical field of rail transit operation control and energy-saving optimization, and the method comprises the steps: setting training parameters, vehicle information and freight train line information, and initializing a reinforcement learning environment and variables; calculating a selection action by utilizing a strategy function; decomposing the action vector to obtain a new state; calculating the state value of the new state; updating a Q value related to the current state in the Q table; and for the condition that the current step number n exceeds the maximum round number N, judging whether the updated Q table is converged or not by using the total reward, if so, executing actions by the agent according to the Q table, calculating a new state, obtaining a final sequence working condition, and completing the air-power joint multi-target operation optimization of the freight train. The problem that in the prior art, air braking and electric braking are not well matched in the long downhill section circulating braking process of the heavy-duty train is solved.

The invention discloses a control method for stable operation of a heavy-load combined train. The method is applied to the heavy-load combined train formed by connecting at least two traction locomotives and at least one dragged vehicle in series, and comprises the following steps: when the ramp type of the heavy-load combined train running on the current line is a preset type, before or simultaneously adjusting the working state of an air braking device to be a relieving state, adjusting the working state of the air braking device to be the relieving state; controlling the power braking device of the master control locomotive to increase the power braking force, and increasing the power braking force by the power braking device of the slave control locomotive; when the working state is adjusted to be a relieving state, the initial relieving moment is determined, when the accumulative relieving duration reaches the preset first duration, the power braking force of the power braking device of the master control locomotive is adjusted and reduced, and the power braking force of the power braking device of the slave control locomotive is adjusted and reduced; changes of hook pulling force and hook pressing force of the middle slave control locomotive are reduced, the longitudinal force of the train is controlled within an evaluation index range, and the running safety and stability of the train are improved.

A device adapted for attachment to a coupler of a trailing railcar of a train includes an enclosure defining an internal compartment, a port adapted for connection to an air brake hose receiving air from a brake pipe of the train, a handle extending from the enclosure, a communication device disposed within the internal compartment of the enclosure, and at least one antenna connected to the communication device and extending at least partially through the internal compartment of the enclosure and into an internal cavity of the handle.

A number of variations may include a product including a body mounted air brake stabilizing and steering a vehicle having autonomous driving capabilities or functions, and a method of using the same, wherein the air brake is power actuated.

The utility model relates to the technical field of air brake steel pipes, and discloses an anti-corrosion air brake steel pipe which comprises an air brake steel pipe body and a connecting ring, fixing rings are fixedly arranged at the two ends of the air brake steel pipe body, and the outer surface of the air brake steel pipe body is coated with an anti-corrosion coating. The threaded caps are aligned and inserted into the corresponding connecting rings, then the threaded caps are rotated to rotate the hemispheroid clamping blocks into the corresponding spherical clamping grooves in the connecting rings, at the moment, the hemispheroid clamping blocks are connected with the corresponding spherical clamping grooves in a clamped mode under the springback effect of the springs, and rapid installation of the air brake steel pipe is achieved. By rotating the fixing ring, the hemispheroid clamping block is separated from the spherical clamping groove and retracts into the mounting groove again to complete unlocking, and then the air brake steel pipe can be rapidly disassembled; the anti-corrosion coating has good adhesive force and abrasion resistance, the air brake steel pipe can be effectively protected from being affected by the external environment, meanwhile, the air brake steel pipe can be effectively prevented from being corroded, and the service life of the air brake steel pipe is greatly prolonged.

The utility model relates to the technical field of air brake steel pipes, and discloses an air brake steel pipe for automobile braking, which comprises a bottom plate, a clamping mechanism fixedly mounted on the top end face of the bottom plate, a connecting plate fixedly mounted on the top end face of the bottom plate, an adjusting mechanism fixedly mounted on the top end face of the connecting plate, and a cutting mechanism fixedly mounted on the side face of the adjusting mechanism. The adjusting mechanism comprises a fixing frame, a servo motor is fixedly installed on the side face of the fixing frame, and a first bearing sleeve is fixedly installed on the end face of the servo motor. When a steel pipe needs to be cut in a fixed-length mode, a servo motor is started, a first threaded rod is driven to rotate, the servo motor is matched with a first threaded sleeve to drive a sliding block to be slidably connected to the side face of a guide rail, a pointer installed on the top end face of the sliding block is further driven to move, and then the servo motor is matched with a graduated scale to drive a cutting mechanism installed on the side face of the sliding block; and the device moves to a designated position, so that the required cutting length is adjusted, the cutting length can be adjusted, and the use scene of the device is improved.

The application relates to a high-sealing fireproof air brake for a ship, which comprises a frame, a plurality of square blades for closing a ventilation channel in the frame after rotation, and a driving device; hollow edge columns are arranged on two inner side walls of the frame located on both sides of the air flow direction of the ventilation channel; first water through holes are arranged on the two hollow edge columns, and water injection pipes are communicated with the two hollow edge columns; the square blades are hollowly arranged and both ends of the square blades are provided with second water through holes; when the ventilation channel in the frame is closed after the rotation of the square blades, the two square blades located at the most edge are communicated with the corresponding hollow edge columns through the second water through holes of the square blades and the first water through holes of the corresponding hollow edge columns, and the second water through holes of the two adjacent square blades are communicated. The application has the advantages of high sealing.

The invention discloses a rail transit train longitudinal dynamic modeling traction and dynamic braking force calculation method, which comprises the following steps of: 1, acquiring the acceleration of a train, and calculating the sum of external forces borne by the train; 2, calculating the running resistance borne by the train; 3, air braking force borne by the train is calculated; 4, calculating the total traction force and the dynamic braking force of the train; and 5, distributing the total traction force and the dynamic braking force of the train to a specific vehicle. The method has the advantages that the method does not depend on acquisition of a locomotive performance curve any more, complexity and difficulty of locomotive control characteristic modeling in an existing method are simplified, accurate calculation and distribution of train traction and dynamic braking force can be achieved, and construction of a rail transit train longitudinal dynamic model is effectively supported.

The invention belongs to the technical field of rail vehicle engineering, and discloses a simulation calculation method for accurately calculating train dynamic curve passing, which comprises the following steps of: establishing a longitudinal-transverse-vertical interaction heavy haul train-rail three-dimensional coupling dynamics refined model; nonlinear links (such as axle box suspension nonlinearity, center plate contact nonlinearity, wedge friction nonlinearity, coupler gap impact effect and dry friction nonlinearity, buffer nonlinear hysteresis impedance and the like) of locomotive suspension and the multi-parameter continuous change characteristic of a curve track are fully considered. If the coupler is used as an independent rigid part for modeling, analyzing the actual coupling and vibration characteristics of the coupler; in combination with the gas flow theory, an air braking model is further improved, and the influence of a train marshalling form on braking wave distribution and braking wave transmission, the influence of distribution of braking force and brake shoe pressure in the braking process on the vehicle wheel-rail power effect and the like can be considered.

The utility model discloses a pneumatic silencing valve for PCTC, including silencer casing and air brake casing, the outside fixed support platform of silencer casing, the middle part rotationally connected with the main shaft of air brake casing, the rotationally connected with four driven shafts in air brake casing, every two driven shafts equidistance distribution are in the both sides of main shaft, and the air brake blade is fixed with in the outside of main shaft and driven shaft, and the end part that extends to the outside of air brake casing is fixed with crank no.1 in the main shaft and the driven shaft of being in the first, third position, and the end part that extends to the outside of air brake casing is fixed with crank no.2 in the driven shaft of being in the second, fourth position, and one side of air brake casing is provided with connecting rod no.1, connecting rod no.2 and connecting rod no.3. Air brake adopts two -way alternate open -close blade group, and five -piece blade group is driven by the main shaft, and the odd -numbered blade and even -numbered blade form reverse rotation mechanism, and the concentrated eddy current that alternately opens and shuts mode effectively avoids the traditional same -direction opening and closing, and reduces local turbulent energy loss.

The invention relates to the technical field of hydrogen fuel cells, in particular to a locomotive hydrogen fuel cell, an air braking system and a centralized air supply method of the locomotive hydrogen fuel cell and the air braking system. Comprising a first buffer air cylinder and a second buffer air cylinder which are located in the center of a system, one end of the first buffer air cylinder is connected with one end of the second buffer air cylinder, a second check valve is arranged on a connecting pipeline, a pressure sensor is arranged at the end of the extending end of the connecting pipeline, and one end of the first buffer air cylinder is connected with a fuel cell through a pipeline. A pressure reducing valve is arranged on a pipeline connecting the first buffer air cylinder and the fuel cell, the other end of the first buffer air cylinder is connected with an air compressor through a pipeline, an air purifying device and a first check valve are arranged on a pipeline connecting the first buffer air cylinder and the air compressor, and the other end of the second buffer air cylinder is connected with an air braking system. The system is provided with a plurality of air compressor sets, and normal operation of the locomotive cannot be affected even if a single air compressor breaks down.

The utility model provides an air brake interlocking device with a timing function, which relates to the technical field of waste gas treatment systems and comprises a base and two valves, each valve comprises a brake bar, a shell is arranged on the base, two timers are arranged on the outer side of the shell, two flow guide coils are arranged in the shell, one flow guide coil is arranged close to one side of the shell, and the other flow guide coil is arranged close to the other side of the shell. The timer is used for displaying and recording interlocking actions, after the diversion coils are in contact with the metal rod, the contact is in contact with the switch, when the threaded sleeve rotates to drive the interlocking plate to slide, the interlocking plate drives the metal rod to slide and be inserted into the diversion coils, and induced current is generated. Induced current passes through the current sensor, the comparator and the trigger pin, and records are displayed on the timer.

The utility model discloses a loader braking system, and belongs to the technical field of engineering machinery. The loading machine braking system overcomes the defect that in the prior art, due to the failure of a traditional loading machine braking system, vehicle braking cannot be achieved even if a brake is stepped down. The main structure of the device comprises an air storage assembly, an air outlet of the air storage assembly is connected with an electric control brake valve and an air brake valve, the electric control signal end of the electric control brake valve is connected with an electric control pedal through a controller, and air outlets of the electric control brake valve and the air brake valve are connected with air inlets in the two ends of a pressure selection assembly respectively. An air outlet of the pressure selection assembly is connected with the rear axle brake caliper and the front axle brake caliper through the booster pump. The utility model is mainly applied to engineering machinery such as loaders and the like.

The invention provides a method for generating performance degradation data of a train air braking system. The method comprises the following steps: on the basis of a brake system of a preset model, analyzing three stages of pressure rise, maximum pressure and pressure stability of pressure change of a brake cylinder, and extracting a plurality of typical fault modes; based on an extended random process model with non-monotonicity and independent incremental property, three stages of pressure change of a brake cylinder and multiple typical fault modes are combined, and linear, nonlinear or stepped performance degradation process modeling of the train air brake system is carried out; overlapping normal distribution random noise on a performance degradation track generated by modeling, simulating a control precision error of an actual braking system, and optimizing a performance degradation process model of the train air braking system; and utilizing the train air braking system performance degradation process model to generate train air braking system performance degradation data in batches.

A safety device including a pneumatic conductor and a pneumatic valve, the pneumatic conductor configured to be connected at a first end of the pneumatic conductor to the pneumatic valve and the pneumatic conductor configured to be connected at a second end to a second valve, wherein the second valve is configured to be pneumatically connected to an air brake system, wherein the pneumatic valve is opened to activate the air brake system and closed to de-activate the air brake system.

An air brake release system includes a shore power detection circuit configured to provide a power detection signal when a shore power supply is detected, a switch moveable between a first position and a second position in response to an air supply, and a solenoid valve operably connected to the shore power detection circuit and the switch. The solenoid valve is moveable between (1) an air supply position when the power detection signal is not being provided by the shore power detection circuit and the switch is moved to the second position, and (2) a non-air supply position when the power detection signal is provided by the shore power detection circuit and the switch is moved to the second position. A method of operating an air brake system is also provided.

This invention belongs to the field of vehicle suspension technology and discloses a double wishbone independent suspension system and a vehicle. The double wishbone independent suspension system includes a frame assembly and a steering mechanism. The steering mechanism includes a steering knuckle, a shock absorber assembly, an upper control arm assembly, an air brake disc assembly, a lower control arm assembly, and a rack and pinion steering assembly. The shock absorber assembly is located on the side of the frame assembly; the upper control arm assembly is connected to the upper part of the shock absorber assembly and the steering knuckle; the air brake disc assembly is spaced behind the shock absorber assembly in a first direction; the lower control arm assembly is connected to the frame assembly and the steering knuckle, and the lower part of the shock absorber assembly is connected to the lower control arm assembly; the tie rod of the rack and pinion steering assembly is located below the lower control arm assembly and connected to the steering knuckle. This double wishbone independent suspension system can improve the vehicle's suspension comfort and handling stability, and can ensure the vehicle's braking reliability.

A system and a method includes one or more processors to control operation of an air brake system having plural braking devices each disposed on a different vehicle of a vehicle system and configured to control braking efforts in the air brake system via the braking device disposed onboard the corresponding vehicle. The one or more processors may communicate one or more command messages to the braking devices to control one or more of a rate of a braking effort propagation along the vehicle system or a direction of the braking effort propagation between the plural braking devices.

1. The name of the design product: pump part of air compressor. 2. The use of the design product: the overall product is an air compressor mounted on a vehicle or the like, which supplies compressed air to a pneumatic device such as an air brake, and the claimed part is the pump part of the air compressor. 3. The design points of the design product: in the shape of the claimed part. 4. The picture or photograph best indicating the design points: perspective view 1. 5. Other circumstances requiring explanation: the design product requires partial design protection, the part other than the purple covered part is the claimed part, and the purple covered part is not the claimed part.

The invention discloses an air suspension passenger car braking force intelligent regulation and control system which comprises a vehicle detection module, a braking force distribution module and a suspension adjusting module, relates to the technical field of automobile suspension braking force regulation and control, and solves the problems that the bearing capacity of a passenger car is large, so that the mass difference between light load and heavy load is large, and if full braking meets the heavy load braking effect, the braking force of the passenger car cannot be adjusted. The technical problems that the heavy brake nodding phenomenon and even the rear axle wheel jumping phenomenon occur due to the fact that the braking force is too large when the vehicle is under light load and the wheel base is small, and therefore the riding experience is poor for passengers are solved. According to information of a brake pedal stepped by a driver of the vehicle when the driver drives the passenger car, the obtained deceleration required by braking can better meet the deceleration actually required by the driver, and then the electric braking force and the air braking force are distributed according to the load state, so that the maximum braking force of the vehicle can be improved; and the electric braking force proportion is adjusted according to specific conditions, the braking effect can be guaranteed, and meanwhile the energy recovery efficiency of the vehicle is improved.

This invention relates to a method, apparatus, equipment, and storage medium for detecting air brake faults in subway vehicles, belonging to the field of fault diagnosis technology. The method involves: acquiring in-stock data of subway vehicles based on in-stock screening rules; setting the inflation / deflation cycle duration T under normal operating conditions for the subway train; extracting and processing in-stock data for duration T to obtain a training dataset; dividing the data in the training dataset into normal data and fault data based on the subway vehicle's operation and maintenance data to establish an air brake fault detection model; acquiring the data to be detected during subway vehicle operation; importing the data to be detected into the air brake fault detection model to obtain the detection results. This method achieves multi-dimensional detection of subway vehicles through multi-dimensional in-stock data, effectively improving the accuracy of fault detection in the air brake system of subway vehicles.