439 results about "Air brake" patented technology

A brake monitoring system for an air brake arrangement including: at least one sensor to measure air pressure in at least one component of an air brake arrangement; at least one local controller to determine air brake data; and at least one communication device to transmit at least a portion of the air brake. An air brake arrangement and a computer-implemented method of determining air brake data in an air brake arrangement are also disclosed.

The invention relates to a method and a system for testing the brake of a high-speed motor train unit. The method comprises the following steps of: in a stationary state of a motor train unit, simulating various speed signals, train air spring load signals and regeneration brake analog signals by utilizing the testing system; after various analog signals are received by the motor train unit, applying a brake action by a train brake system, and outputting brake information; and acquiring and analyzing brake information data and judging whether the design requirements for various performance indexes of the brake system are met. According to the method and the system, in the stationary state of the motor train unit, various performance indexes of the motor train unit brake system can be comprehensively and effectively tested through simulating the train speed signals and the train air spring load signals, wherein the performance indexes comprise brake response time of the motor train unit, logic motions of an anti-slip system, regenerated brake feedback, air brake, sequential coordination control of regenerated brake, and the like, so that intensive study of complete train debugging key technologies of the motor train unit is realized so as to achieve the purpose of all-around high-precision analogue simulation of the test of the brake system.

The invention provides a brake system of CRH (China railway high-speed) and a brake method thereof. The brake system of the CRH comprises brake instruction equipment, a brake control unit, a basic brake device, a power brake device, and an air source device, wherein the brake instruction equipment is used for sending out a brake instruction; the brake control unit is used for receiving the brake instruction, and distributing the brake power; the basic brake device is used for executing the air brake; the power brake device is used for executing the non-friction brake; the air source device is used for providing compressed air for the brake system and other air utilization equipment. The brake method is used for the brake system of the CRH. The brake control method has the advantages that by favorably distributing the brake force, when the power brake of the CRH is sufficiently utilized, and the air brake distribution of the CRH and a trailer is also performed; by properly setting the numbers of basic brake devices of CRH and trailer in the brake system, the brake force which is applied to each set of basic brake device is uniform; the overhauling, maintenance and economy of basic brake are favorably realized.

The invention relates to the field of a semi-trailer train, in particular to a brake control system and method for the semi-trailer train. The brake control system for the semi-trailer train comprises an air braking system, a controller ECU (Electronic Control Unit) and a vehicle condition monitoring system; the air braking system comprises an energy supply module, a tractor braking module and a trailer braking module; the energy supply module comprises an air compressor, a standby air source, a pressure regulating valve and a three-loop protection valve; the tractor braking module comprises a tractor front-axis gas storage barrel, a tractor rear-axis air storage barrel; a brake proportional valve, a first two-position two-way electromagnetic valve, a tractor front-axis brake air chamber, a tractor rear-axis brake air chamber, a first air pressure sensor and a second air pressure sensor; the trailer braking module comprises a trailer air storage barrel, a second two-position two-way electromagnetic valve, an electrical control proportional valve, a trailer brake air chamber and a third air pressure sensor. According to the system, a braking pressure on a tractor and a trailer is regulated in real time; meanwhile, the problem of delay of trailer braking is solved; brake safety of the semi-trailer train is improved.

The invention discloses a relay valve control method and device in a hill starting process and an air braking system. The method comprises the following steps of: acquiring a clutch pedal position signal and a speed signal; judging that a vehicle is in an anti-slip braking state when a clutch pedal is in the lowest position and the speed of the vehicle is zero, or judging that the vehicle is in an anti-slip braking releasing state when the clutch pedal is not in the lowest position and/or the speed of the vehicle is not zero; and when the vehicle is in the anti-slip braking state, instantly inputting high pressure control gas to a control gas inlet to a relay valve to realize the anti-slip braking of the vehicle, when the vehicle is in the anti-slip braking releasing state, stopping inputting high-pressure control gas to the control gas inlet to the relay valve to release the anti-slip braking of the vehicle, or when the vehicle is switched to the anti-slip braking releasing state from the anti-slip braking state, stopping inputting high-pressure control gas to the control gas inlet to the relay valve after delaying setting time so as to release the anti-slip braking of the vehicle. The control method provided by the invention is simple, and the performance demand on the control device is low.

The invention relates to a microcontroller control electro-pneumatic brake unit for locomotive brake systems and aims to achieve conversion of electrical signals of a locomotive brake system and an air brake pressure signal. The microcontroller control electro-pneumatic brake unit comprises an air circuit portion and an electrical portion; the air circuit portion mainly comprises an intake electromagnetic valve, an exhaust electromagnetic valve and a pressure sensor. The electrical portion mainly comprises a life signal module, an RS232 communication module, an analog input module, a CAN (controlled area network) communication module, a BI (batch input) module, a master control CPU (central processing unit) module, a monitoring CPU module, a high-speed electromagnetic valve drive module, an analog acquiring module and a power processing module powering the modules above. The electro-pneumatic brake units in a brake control system can automatically control train tubes, distributor valves and independent brake pressures, separately, automatically in response to control commands of the electro-pneumatic brake units, the stability of the brake control system is improved, and fault rate is decreased.

In a feeding device comprising turret arms having spindle shafts for supporting a web roll, an air brake for applying a braking force in a rotating direction to the spindle shafts, and an accelerating motor for applying a drive force in the rotating direction to the spindle shafts and a braking force in the rotating direction to the spindle shafts, a braking force control device has a tension control device which exercises control such that if a braking force required for the spindle shafts is lower than a constant value, only the braking force from the accelerating motor is supplied to the spindle shafts, and that if the braking force required for the spindle shafts is higher than the constant value, the braking force from the accelerating motor is supplied to the spindle shafts, and the braking force of the air brake is supplied to the spindle shafts.

A vehicle brake system includes a source of fluid pressure adapted to supply a braking force to at least one brake actuator and a modular valve unit fluidly coupling the brake actuator to the source of fluid pressure. The modular valve unit includes a plurality of valve modules. Each of the plurality of valve modules includes a housing in which working elements of the valve module are contained and at least one port in the housing adapted to be an input port or an output port, the at least one port being adapted to cooperate with and be directly fluidly connected to at least one port of another of the plurality of valve modules, thereby obviating the need for tubing or piping. Each of the plurality of valve modules is self-contained and defines a stand-alone unit capable of operating independently of any other of the plurality of valve modules.

The invention discloses an environment room working condition adjusting system which comprises an air conditioner cabinet, a cooling device, a secondary refrigerant freezing circulating pipeline and a secondary refrigerant thermocycling pipeline. The system can work at a temperature lowering state, a working condition stable state, a defrosting state, an after-defrosting recovery state and a temperature raising state. By switching control of the freezing circulating pipeline, the thermocycling pipeline and an air conditioner electric air brake, a proper cold source and a proper heat source can be provided for a freezing surface air cooler and a cold and heat surface air cooler of the air conditioner cabinet, and the stability of environment room temperature and humidity working conditions is guaranteed. Surface air cooler automatic defrosting under the low-temperature working conditions is achieved, environment room working condition stability during the defrosting process can be guaranteed, and long-time operation of the low-temperature working conditions is achieved. The cooling device of the system is provided with a heat recovery unit, waste heat recovery is used for controlling secondary refrigerant temperature, and energy-saving operation is achieved.

The invention discloses a locomotive air and electricity composite braking control system, which comprises an independent control valve IBV, an automatic control valve ABV, a braking control unit BCU, a central processing unit CPU, a locomotive braking unit LBU, a dynamic braking device DBU and a tread braking unit TBU; the output end of the independent control valve IBV and the output end of the automatic control valve ABV are respectively connected with the input end of the braking control unit BCU; the output end of the braking control unit BCU is connected with the input end of the central processing unit CPU; the output end of the central processing unit CPU is respectively connected with the dynamic braking device DBU and the braking control unit BCU; the output end of the braking control unit BCU is respectively connected with the locomotive braking unit LBU and the tread braking unit TBU. The locomotive air and electricity composite braking control system is safe, reliable, energy-saving and environmentally friendly; without changing the operation habit of a driver, dynamic braking can be realized by directly controlling an air braking handle; during braking, dynamic braking is stimulated preferentially, so that energy consumption is reduced to the maximum degree, and energy recovery is implemented.

Embodiments of the invention provide a control system for controlling centralized braking of a train. The system comprises a pressure acquisition device and a train pipe control device, wherein the pressure acquisition device is used for acquiring a pressure of a main blast line; a pressure signal output end of the pressure acquisition device is connected with a pressure signal input end of the train pipe control device; a brake signal input end of the train pipe control device is connected with a brake signal output end of a brake controller; the train pipe control device is pneumatically connected with the main blast line and a train pipe through an air path end respectively. According to the scheme, the mounting space of a trailer and the cost are reduced. Moreover, because an automaticbrake control system is adopted to control pressure changes of the train pipe, a train can be linked with a passenger carriage adopting automatic air braking for operation, and the pressure changes of the train pipe and five-wire system control signals are controlled according to a brake request output by the brake controller and detection of a real-time pressure of the train pipe, thus realizingflexible formation.

The invention relates to a high speed train braking system and a braking method thereof. The braking method comprises the following steps of classifying fraction coefficient values into multiple sections according to a speed range and prestoring the classified fraction coefficient values into a BCU (Braking Control Unit); sending out a control instruction by virtue of the BCU; calculating air braking force required for train braking by virtue of the BCU; and finally generating a PBC (Pressure of Braking Control), and conveying hyperbaric air to a braking execution device, wherein the braking execution device is used for executing braking or parking. The BCU adopts a fraction coefficient which is not a constant average fraction coefficient, but is a sectional fraction coefficient value based on different speed ranges and braking levels, thereby being beneficial to the matching of a practical output braking force and a designed braking force; a condition that the practicable braking force is far greater than the designed braking force is avoided, so that the braking is smooth and steady; and meanwhile, the abrasion of a braking disc and a brake pad can be reduced, and the use economical efficiency of basic braking is improved.

An air brake controlling method and system for electric car is disclosed. An air compressor starting/stopping control system is arranged in the air brake control system for making the air compressor work in preset pressure range. When the air compressor is stopped, the electromagnetic valve and pneumatic direction valve are used to unload the energy supply loop and discharge pollutant, ensuring that the air compressor is started in idle state.

The invention relates to a control valve for indirectly acting compressed-air brakes of railway vehicles, containing a triple-pressure element (24) and a twin-pressure element (1), which comprises a control piston (2; 2'), on which from one side the pressure of the air of a main air line (L) acts and from the opposite side the pressure of the air of a valve spool chamber (S) acts and which interacts with an acceleration valve (6) via a tappet (5), which, in the open state, connects the main air line (L) via a check valve (12), and connects the valve spool chamber (S) via a valve (8; ; 8') or via a bore (9), to a channel (7), and further to a channel (13) for the additional ventilation at the start of braking via the triple-pressure element (24) and to a ventilation path (14) in the twin-pressure element (1) to the surroundings, wherein at least one throttle area (10) is arranged in the ventilation path (14), the effective cross-section of said throttle area being variable via actuation means in the twin-pressure element (1) from a closed or inactive state or from a minimum cross-section to a maximum cross-section.

The invention discloses a high-speed train braking force optimal distribution method which can be used for an electric-air braking force distribution strategy of a high-speed train; the method has thefollowing steps: firstly, building a mathematical model of a high-speed train braking process, and calculation of an object braking force, an electric braking force and an operation resistance is included; secondly, designing an objective function and constraint conditions for brake force optimal distribution, and proving the existence of an extreme value of the objective function; and then converting the established objective function and constraint conditions into a quadratic plan for solving. And finally, simulation shows that the distribution method not only can fully utilize different adhesion limits of each vehicle to effectively exert the available braking force of each vehicle, but also can reduce the slipping phenomenon of the bullet trains in a wet rail surface braking process,and is beneficial to improving the braking performance of the train and improving the braking efficiency.

Disclosed herein is a dishwasher. The dishwasher includes a main body, a tub placed within the main body to receive dishes therein, and an air brake mounted to one lateral surface of the tub. The air brake includes a communication hole communicating with the tub to allow air to be introduced into the tub or to be discharged from the tub, a guide rib configured to guide air, introduced through the communication hole, upward of the air brake, and a vent formed in a lateral surface of the air brake to allow air to be discharged outward from the air brake or to allow outside air to be introduced into the air brake, the vent being located below the guide rib to prevent hot air from being discharged from the air brake.

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 train brake control method and equipment. The method comprises the following steps: when emergency brake signals sent by a part of brake control units BCU are acquired, generating a first punishment brake signal, sending a traction blocking signal to a traction control unit DCU so as to enable the DCU to control the traction motor to output traction force with the numerical value lower than a preset value; sending a first punishment braking signal to a first target BCU in the train; when the BCU which does not send the emergency brake signal receives the first punishment brake signal, controlling the corresponding air braking device to output punishment braking force, wherein the first target BCU at least comprises a BCU which does not send an emergency braking signal, The braking force of the whole train in a non-traction running state can be increased, and the deceleration of the train is increased, so that the high friction force and high loss of the wheelsof the vehicle subjected to accidental emergency braking can be quickly dispersed to the wheels of other vehicles, the high friction force and high loss of the local wheels of the train are reduced,and the wheel scratching risk is reduced.

An air brake monitoring system includes an air brake control module and an air brake monitoring module. The air brake control module is configured to control variation of an amount of pressure in a brake pipe of the vehicle to actuate brakes of a braking system of the vehicle. The air brake monitoring module is configured to obtain a reference replenishment volume corresponding to a volume of air used to recharge the braking system after application of the brakes of the braking system when the braking system when a first amount of brakes are operational, to obtain an actual replenishment volume corresponding to an actual volume of air used to recharge the braking system of the vehicle after a braking activity performed by the vehicle, and to generate a signal based on a comparison of the actual replenishment volume to the reference replenishment volume.

The invention discloses an inflation pump control method and device for an air brake electric car, and relates o the field of inflation pump control methods. The inflation pump control method includes: determining if an inflation pump is in a starting up state or not; detecting the air pressure, determining if the air pressure is less than a lowest threshold or not, regularly measuring small air pressure values of an air storage tank set after the inflation pump starts working if so; differencing last five adjacent small air pressure values, and summing the differences to acquire an accumulative air pressure difference P; determining if an absolute value of the accumulative air pressure difference P is less a control threshold or not, and delaying 20 s and determining if the air pressure of the air storage tank set is greater than the lowest threshold or not during the period if so; allowing the inflation pump to stop working if so and jumping to air pressure detection; and allowing the inflation pump to work continuously if not till inflation is completed. The problem that the conventional inflation pumps are influenced by factors such as dryers, mechanical pressure adjustment andenvironments and result in poor control precision can be solved; stop is determined according to a stabile pressure, and the defects of poor control precision of the inflation pumps due to the fact the prior art is influenced by various factors can be overcome.

The invention discloses an intelligent cascade test system for braking of a single-marshalling train, and belongs to the technical field of semi-physical simulation. The system is characterized in that in order to realize a cascade control strategy, a single-marshalling train brake test platform formed by cascade marshalling and an upper computer software platform are constructed, and the system comprises the following parts: 1, cascade marshalling: the cascade marshalling is formed by an actuator controller, two brake actuators, a set of brake gas circuit structure and a data acquisition module; and 2, the upper computer software platform, wherein the upper computer software platform is used for configuring air brake parameters, cascade marshalling number and basic test parameters of test conditions. According to the cascade cycle control strategy, the braking performance test of M marshalling trains can be completed through M cascade tests by using the existing single marshalling train braking test platform.

The embodiment of the invention provides a braking force distribution method, device and system for an urban rail train. The braking force distribution method comprises the following steps of acquiring a total braking force target of a train and a total electric braking capacity which can be provided by all bullet trains of the train, wherein the total braking force target is calculated by a trainbraking system, and the total electric braking capacity is calculated by a train traction system; and when the total electric braking capacity is smaller than the total braking force target, using the train braking system to distribute the total electric braking capacity to all bullet trains, and using the train braking system to equally distribute a first-level air braking force to the middle train, wherein the first-level air braking force is equal to a difference value between the total braking force target and the total electric braking capacity. According to the embodiment of the invention, a technical problem that the urban rail train is high in probability of sliding is solved.