561 results about "Inlet manifold" patented technology

The invention discloses an air-fuel ratio control method for a high-pressure direct injection engine in a diesel-natural gas dual-fuel cylinder, and relates to the technical field of engine control, and the air-fuel ratio control method comprises the following steps: collecting diesel mass flow, natural gas volume flow and natural gas component data, and determining a diesel-natural gas mixing ratio; a basic target air-fuel ratio is obtained by combining the real-time rotating speed of an engine, the load and the diesel oil-natural gas mixing proportion; based on the pressure and temperature of the intake manifold and the rotating speed of the engine, the target air-fuel ratio after model correction is obtained; the working condition load change rate is detected, the pre-optimized air-fuel ratio trajectory MAP is called, and a transient correction target value is generated; calculating the deviation between the transient correction target value and the measured value of the air-fuel ratio sensor and the deviation change rate, and outputting an air-fuel ratio correction value; and the final target air-fuel ratio is calculated and sent to an air flow control valve to execute air inlet adjustment. The method is suitable for engine application scenes requiring high-precision and self-adaptive control to improve combustion efficiency and reduce emission.

The invention discloses a pipeline system for improving the self-pressurization speed of a gas vehicle and reducing the inlet gas temperature rise and a vehicle, and relates to the technical field of vehicle power system heat dissipation, the pipeline system for improving the self-pressurization speed of the gas vehicle and reducing the inlet gas temperature rise comprises an LNG vaporization pipeline, the LNG vaporization pipeline comprises a gas cylinder and a vaporizer, and the LNG vaporization pipeline is used for outputting vaporized LNG to an engine; the supercharging pipeline comprises a supercharger and an intercooler and is used for supercharging outside air to form high-temperature and high-pressure gas and cooling the high-temperature and high-pressure gas so as to convey the high-temperature and high-pressure gas to an engine intake manifold; the cold and heat energy coupling area, a channel between the gas cylinder and the vaporizer and a channel between the supercharger and the intercooler penetrate through the cold and heat energy coupling area so that heat exchange can be conducted between the high-temperature and high-pressure air and LNG. Cold and heat exchange can be achieved through LNG cold energy and the pressurization pipeline, meanwhile, the vaporization efficiency is improved, and the heat dissipation burden of the intercooler is relieved.

The invention provides an intake manifold split charging tool, and relates to the technical field of engine manufacturing, the intake manifold split charging tool comprises two groups of mounting seats, the side walls of the mounting seats are rotatably connected with rotary discs, and a mounting plate is connected between the rotary discs; the device further comprises a hydraulic clamping mechanism, the hydraulic clamping mechanism comprises multiple sets of fixing cylinders, the multiple sets of fixing cylinders are fixedly connected with the side wall of the mounting plate, the multiple sets of fixing cylinders are connected through multiple sets of communicating pipes, fixing rings are arranged in the fixing cylinders, multiple sets of sliding holes are formed in the surfaces of the fixing rings, and the sliding holes are communicated with the communicating pipes. According to the split charging tool for the intake manifold, through the multi-dimensional clamping system, all-dimensional stable constraint on the intake manifold is achieved, and the problem that the clamping stability of a traditional tool is insufficient is solved.

The invention discloses a gas engine cold start difficulty diagnosis method, system and device and a readable storage medium, and relates to the field of cold start fault detection, and the method specifically comprises the steps: determining an initial idle speed segment based on a real-time vehicle speed, a real-time engine rotation speed, a neutral gear signal and a clutch signal when the lowest environment temperature is detected to be smaller than a preset environment temperature threshold value; the initial idling segment is a working state when the vehicle is static and an engine is in an idling mode; in the initial idle speed segment, based on the maximum value of the engine rotating speed, the real-time engine rotating speed, the real-time gas rail pressure, the real-time gas rail temperature, the engine water temperature at the starting point of the initial idle speed segment, the real-time accelerator opening degree and the fault code, the cold start difficulty result of the gas engine is determined; the fault code is a corresponding fault code when the pressure of the intake manifold is smaller than a preset pressure threshold value of the intake manifold. According to the invention, specific faults of cold start difficulty can be identified efficiently and accurately.

An engine backfire problem-based alarming method, apparatus, and device, and a computer-readable storage medium. The method comprises: on the basis of collected information on the current vehicle speed and information on the temperature change of an air inlet pipe, determining whether a backfire problem occurs in an engine of a vehicle; if it is determined that the backfire problem occurs in the engine, calculating a total pressure impact on the air inlet pipe generated by the occurrence of the backfire problem in the engine; and sending alarm information on the basis of the total pressure impact on the air inlet pipe generated by the occurrence of the backfire problem in the engine. The method solves the existing technical problem in the related art that, when an engine backfire problem occurs, natural gas burns in an air inlet pipe, causing the air inlet pipe to crack, thereby rendering a vehicle unable to travel. The method enables an accurate determination of the change in strength of an air inlet manifold on the basis of a pressure impact generated by a backfire problem, thereby identifying in advance whether the air inlet manifold is cracked, providing an advance alarm to prompt replacement of the air inlet manifold, and avoiding the inability of the vehicle to travel due to cracking of the air inlet manifold.

The utility model provides a power take-off device independent of a blast pump and a vacuum pump, which comprises a power transmission mechanism and an engine intake manifold, the engine intake manifold is connected with one end of a first vacuum air pipe, the other end of the first vacuum air pipe is connected with one side of a vacuum tank, and the other side of the vacuum tank is connected with a vacuum pump. The other side of the vacuum tank is connected with one end of a second vacuum air pipe, the other end of the second vacuum air pipe is connected with a vacuum cylinder, and the vacuum cylinder is connected with a power transmission mechanism. According to the power take-off implementation device independent of the inflating pump and the vacuum pump, the blank of a power take-off scheme of a vehicle type without a vacuum pump and an inflating pump on the market is filled, and the possibility is provided for achieving multiple functions of the vehicle type; the power takeoff device is simple in structural arrangement, compared with an air pump and a vacuum pump, electric appliances of the whole vehicle are reduced, the power takeoff device is simpler and more convenient, and a new power takeoff technical route is provided for an oil brake type.

The application discloses a methanol engine control method, related device and methanol engine, and relates to the field of engine systems. By constructing a physical model of an air system, a first coupling influence compensation term representing the deterministic coupling influence between each actuator can be calculated in real time according to an expected value and an actual working condition. By introducing a nonlinear extended state observer, uncertainty factors, such as methanol injection amount deviation, pipeline carbon deposition, external environment changes and the like, which cannot be covered by the physical model, can be estimated in real time, and a second coupling influence compensation term can be generated. Finally, by a linear state error feedback control law, the first coupling influence compensation term and the second coupling influence compensation term are fused to form a dual-channel collaborative compensation architecture of physical model feedforward and nonlinear extended state feedback, and rapid and accurate control of an intake manifold pressure is realized. Through the cooperation of the physical model feedforward and the disturbance observation feedback, the control robustness of the intake manifold pressure and other key parameters is improved.

The invention relates to a carbon tank desorption system which comprises a carbon tank, an engine and a negative pressure pipeline. A venturi structure pipeline which is shrunk and then gradually expanded in the exhaust direction of the engine is arranged in the negative pressure pipeline, and a second air inlet B, a first air inlet A and an air outlet C of the negative pressure pipeline are sequentially distributed in the pipeline in the exhaust direction of the engine. A negative pressure pipeline is communicated with an exhaust pipeline of the engine through the second air inlet B and the air outlet C to form a bypass branch of the exhaust pipeline; the carbon tank is provided with a first air outlet pipeline and a second air outlet pipeline, and the first air outlet pipeline is communicated with an air inlet manifold of the engine to form an air inlet desorption route; and the second gas outlet pipeline of the carbon tank is communicated with the first gas inlet A of the negative pressure pipeline to form an exhaust desorption route. The device has the advantages that the two branches are arranged at the gas outlet end of the carbon tank, and negative pressure is formed in the negative pressure pipeline through the Venturi structural characteristic of the negative pressure pipeline so that gas in the carbon tank can be sucked in and transmitted to the gas exhaust pipeline to be combusted.

The invention provides a fuel cell system and a humidification control method thereof. The fuel cell system comprises an electric pile, a humidifier and an air pipeline, wherein the air pipeline comprises a dry air inlet header pipe, an air pile inlet pipeline, a dry air bypass, an air return pipeline, a backpressure pipeline and a bypass pipeline; one end of the air return pipeline is connected with an air outlet of the galvanic pile, and the other end is connected with a return air inlet of the humidifier; one end of the backpressure pipeline is connected with a backflow air outlet of the humidifier, and the other end is communicated with external atmosphere; two ends of the bypass pipeline are connected with an air return pipeline and a backpressure pipeline; a first throttle valve is arranged in the dry air inlet main pipe; a second throttle valve is arranged in the dry air bypass; a third throttle valve is arranged in the air return pipeline; and a fourth throttle valve is arranged in the bypass pipeline. In this way, when humidification is needed, the opening degree of the first throttle valve and the third throttle valve can be increased, the opening degree of the second throttle valve and the fourth throttle valve can be reduced, the water supplementing requirement of the humidifier is lowered, and the problems in the prior art are solved.

A vehicle includes an engine, an intake manifold, a starter motor, a battery, and a control apparatus. The intake manifold is coupled to the engine. The starter motor is configured to start up the engine. The battery is configured to drive the starter motor. The control apparatus includes one or more processors, and one or more memories coupled to the one or more processors. The one or more processors are configured to execute idle reduction control, and execute, during execution of the idle reduction control and before cancelling the idle reduction control, adjustment control of adjusting an internal pressure of the intake manifold and causing the internal pressure of the intake manifold to be lower as a voltage of the battery is lower.

A combustion engine arrangement comprising a combustion engine has an intake manifold, and an exhaust manifold the combustion engine arrangement comprising a turbocharged air intake system fluidly connected to said intake manifold. The turbocharged air intake system has an air pump; and an exhaust gas recirculation (EGR) system fluidly connecting said exhaust manifold to said intake manifold, the EGR system comprising an EGR pump. The EGR pump and the air pump are arranged to be independently controllable so as to enable independent control the exhaust gas inflow and the air inflow to the intake manifold of the combustion engine.

The invention discloses a corrugated manifold micro-channel cold plate with a cold and hot channel shunting function and a use method, and belongs to the technical field of semiconductors, the corrugated manifold micro-channel cold plate comprises a shell, heat sinks arranged on opposite surfaces, a cold plate inlet, an inlet manifold, a cold plate outlet, an outlet manifold and a shunting manifold arranged in the shell, the cold plate inlet and the inlet manifold are connected with the shell and are oppositely arranged, and the cold plate outlet and the outlet manifold are connected with the shell and are oppositely arranged. A closed space is formed by the shell, the heat sink, the cold plate inlet and the inlet manifold, and the cold plate outlet and the outlet manifold. In the working process, cooling fluid enters the closed space of the cold plate through the cold plate inlet and the inlet manifold, then the cooling fluid is precisely conveyed to different cooling areas through the flow dividing manifold, independent cold and hot channels are constructed by combining the different cooling areas formed by the heat sink, and the heat exchange process is completed. The invention provides a structural design of separating a cold channel from a hot channel, and overcomes the defects in the prior art.

The invention discloses a fuel cell bipolar plate and a flow field structure thereof, the flow field structure comprises: an inlet manifold extending along a gas flow direction and having a circulation cross-sectional area gradually reduced along the gas flow direction; a plurality of parallel flow channels are arranged on the side wall of the inlet manifold in the same direction in the direction perpendicular to the gas flowing direction, and the sectional dimensions of the flow channels in the direction parallel to the gas flowing direction are changed in a gradient mode. The flow field structure realizes uniform distribution of gas flow among different flow channels; according to the battery comprising the flow field structure, the problem of local high temperature caused by nonuniform electrochemical reaction due to reduction of oxygen uniformity is avoided.

The utility model is suitable for internal combustion engine gas supply mechanism technical field provides a kind of multi-point injection air intake pipe of gas machine, comprising: main pipeline, its one side is equipped with air inlet, the other side of main pipeline is equipped with several air intake manifold, each air intake manifold is equipped with air jet nozzle, the flow direction of the gas in the inside of air jet nozzle and air intake manifold has certain angle, air intake manifold and main pipeline use integrated structure, by this, the utility model is guaranteed by setting integrated air intake structure, the reliability of air intake, while setting a kind of separate air jet structure, to ensure the separate control to engine, optimization control effect.

To avoid, in an engine system comprising an exhaust gas recirculation device, function failure due to infiltration of condensate water into an intake pipe pressure introduction pipe.SOLUTION: A gas fuel supply device for an engine has a fuel cylinder 1, a regulator 2, an intake passage 5 comprising a throttle 3 and a mixer 4, a fuel pipe 8, an engine 10, and an exhaust gas recirculation device 13 that recirculates part of exhaust gas to the intake passage 5 as EGR gas, the gas fuel supply device comprising an intake pressure outlet formed in the intake passage 5, and a mounting part formed around the intake pressure outlet. The regulator 2 has an intake pressure inlet 30 formed on its outer surface. The regulator 2 is fixed to the mounting part by a fixing member in a state where the intake pressure outlet and the intake pressure inlet 30 are in direct and airtight communication.SELECTED DRAWING: Figure 1

The utility model provides a semi-automatic hot plug device of an intake manifold, which relates to the technical field of hot plug devices of intake manifolds, and comprises a bottom plate and a fixing mechanism, the left side of the bottom plate is fixedly connected with the fixing mechanism, the fixing mechanism comprises a fixing assembly and a pushing assembly, the fixing assembly is arranged on the left side of the bottom plate, and the pushing assembly is arranged on the right side of the bottom plate. Through the arrangement of the functional assembly, when the hot plug operation of the intake manifold is carried out, a heating ring is used for heating the mounting part of the intake manifold to a certain temperature so as to facilitate hot plug, and after an electric telescopic rod pushes the intake manifold to complete mounting, a cooling fan blows air for cooling, so that the hot plug operation of the intake manifold is completed. After insertion, the interface is rapidly cooled, the sealing and stability of the installation of the intake manifold are ensured, the design of the handle enables the whole device to be more portable and convenient to operate, as the installation positions of the intake manifold are different, the position of the functional assembly can be adjusted according to the actual situation, and the hot insertion operation of the intake manifold can be completed more efficiently.

An electronics package includes a manifold housing defining an enclosure and including an inlet port fluidly coupled to an inlet manifold, an outlet port fluidly coupled to an outlet manifold, a first inlet, a second inlet, a third inlet, and a fourth inlet, each fluidly coupled to the inlet manifold and the enclosure, and a first outlet, a second outlet, a third outlet, and a fourth outlet, each fluidly coupled to the outlet manifold and the enclosure. The electronics package also includes a first circuit board coupled to the manifold housing, and a second circuit board coupled to the manifold housing such that the second circuit board is offset from the first circuit board by a first gap. The electronics package further includes a third circuit board coupled to the manifold housing such that the third circuit board is offset from the second circuit board by a second gap.

A fluid end for use with a power end. The fluid end comprises a plurality of fluid end sections positioned adjacent one another. Each section includes a single horizontally positioned bore. A plunger is installed within the bore and includes a fluid passageway. Low-pressure fluid enters the bore through the plunger and high-pressure fluid exits the fluid end through an outlet valve installed within the bore. The intake of low-pressure fluid within the fluid end section is regulated by an inlet valve installed within the plunger. Low-pressure fluid enters the plunger through an inlet component attached to both the plunger and an inlet manifold.

A frameless cooling module to cool a fluid in a motorized vehicle includes a first heat exchanger comprising an inlet manifold; an outlet manifold; and a plurality of ducts fluidly connecting the inlet manifold to the outlet manifold. The inlet manifold and the outlet manifold couple to a chassis of the motorized vehicle.

A diagnostic system for an engine system comprising a plurality of engine cylinders (30) and an air intake manifold (44) for receiving an intake of air during an intake phase of an engine cycle, the diagnostic system comprising; a plurality of fuel injectors (46), each for delivering fuel to an associated one of the engine cylinders (30) via the air intake manifold (44), wherein each of the plurality of fuel injectors (46) has an injector-open state when the fuel injector (46) is delivering fuel during the air intake phase of the associated engine cylinder (30) and an injector-closed state when the fuel injector (46) is not delivering fuel; and a sensor configured to measure the air pressure in the air intake manifold. The diagnostic system further comprises a controller (18) configured to determine an occurrence of a backfire event in the air intake manifold (44) on the basis of the measured air pressure; measure the number of backfire events in the air intake manifold which are associated with one of the fuel injectors (46); compare the number of backfire events with a predetermined count threshold, and, if the measured number of backfire events is greater than the predetermined count threshold, output a warning signal.

Engine system, with: an engine with a plurality of cylinders (11-14) suitable for generating a driving torque by burning fuel; a first intake manifold (31) which is connected to an intake pipe (20) through which intake air flows into a part of the majority of cylinders; a second intake manifold (32) which supplies the intake air through the first intake manifold (31) to another part of cylinders of the plurality of cylinders (11-14); a first exhaust manifold (41) which is connected to a part of the cylinders which is connected to the first intake manifold; a second exhaust manifold (42) which is connected to another part of the cylinders which is connected to the second intake manifold (32); a return line (60) branched off from the second exhaust manifold (42) to be coupled to the second intake manifold (32); a recirculation inlet valve (61) located at the point where the recirculation line (60) and the second exhaust manifold (42) are connected; and a manifold connecting valve (63) which is arranged on an inlet line (20) between the first inlet manifold (31) and the second inlet manifold (32), wherein, when some cylinders are deactivated, the recirculation inlet valve (61) is open to supply exhaust gas from the second exhaust manifold (42) to the second inlet manifold (32), and the manifold connecting valve (63) is cut off in order to prevent intake air from being supplied through the first intake manifold (31) to the second intake manifold (32), and the entire exhaust gas flow rate from the deactivated cylinders flows back into the deactivated cylinders.

The invention discloses a dynamic gas supplementing method, system and equipment for a hydrogen engine and a medium, and relates to the technical field of engine control, the method comprises the steps that the current working condition and the current required gas inflow of the engine are obtained based on the current operation parameters of the engine so as to be matched with a gas supplementing gas source corresponding to the current working condition; the current actual air inflow of the engine is measured, and the difference value between the current required air inflow and the current actual air inflow is calculated; and on the basis of the difference value, the compensation gas amount is calculated through a preset flow compensation algorithm, and a gas supply gas source corresponding to the current working condition is adopted to supply gas to the engine intake manifold with the compensation gas amount. According to the method, the working condition of the engine is recognized, the corresponding air source is matched, meanwhile, the air inlet deviation can be continuously corrected through the preset flow compensation algorithm based on the difference value between the demand and the actual air inlet amount, air inlet pressure fluctuation caused by system delay or disturbance is effectively restrained, and therefore the engine is accurately controlled.

This invention relates to the field of engine intake manifold technology, specifically to an intake manifold with a resonant cavity, comprising a manifold body, a resonant tube, and an intake main pipe connected in sequence. The manifold body is fixedly connected to and communicates with the engine block. A connecting pipe is intersecting the middle of the outer side wall of the resonant tube. The manifold body and the connecting pipe are fixedly connected and communicate with each other. The intake main pipe is coaxially fixedly connected to the resonant tube. This invention achieves continuous adjustment of the resonant cavity volume by setting a bowl-shaped sealing plate and simultaneously setting an elastic tube between the resonant tube and the sealing plate. The elastic deformation capability of the elastic tube automatically compensates for the gap change between the sealing plate and the resonant tube. The maximum diameter of the inner sidewalls of the resonant tube and the elastic tube, and the inner sidewall of the sealing plate, remains consistent, avoiding the flow channel discontinuity problem caused by the setting of baffles and other components in traditional structures. This effectively maintains the smoothness of the inner wall of the resonant cavity and the continuity of the flow field, reduces intake resistance, and improves intake efficiency.

A novel engine general arrangement structure belongs to the technical field of engine general arrangement for engine production and is characterized in that a valve chamber housing assembly is connected to the upper right portion of an efficient supercharged engine body through bolts, and a supercharger air inlet pipe is arranged on the valve chamber housing assembly; the turbocharger assembly and the ternary and catalytic converter assembly are arranged on the exhaust side of the efficient supercharged engine body, the water pump and adapter assembly is arranged below the turbocharger assembly, the intake manifold assembly and the intercooler assembly are arranged on the upper half portion of the intake side of the efficient supercharged engine body, and the intercooler assembly is arranged above the intake manifold assembly. A throttle body is connected between the air inlet manifold assembly and the intercooler assembly, space is effectively saved for arrangement of a generator, the front end of the efficient supercharged engine body is provided with a supercharger air outlet pipeline, and the arrangement requirement of a compact type vertical cabin can be met.

The invention discloses a crankcase ventilation system, a control method and a vehicle, relates to the technical field of engines, and can reduce engine oil emulsification and improve engine reliability. The crankcase ventilation system comprises a crankcase, the crankcase comprises a crankshaft cavity and an oil storage cavity, and the crankshaft cavity is communicated between an engine air cylinder and the oil storage cavity; the air inlet channel is provided with an air inlet manifold, and the air outlet end of the air inlet manifold communicates with an air inlet valve of the engine. The air inlet end of the first exhaust channel is communicated with the crankshaft cavity, the air outlet end of the first exhaust channel comprises a first sub-end and a second sub-end, and the first sub-end is communicated with the first air inlet end of the air inlet manifold; the air inlet end of the second exhaust channel is communicated with the second sub-end, the air outlet end of the second exhaust channel is communicated with the second air inlet end of the air inlet manifold, the first exhaust channel is provided with a first one-way valve, and the second exhaust channel is provided with a second one-way valve.

Provided is a liquid cooling heat dissipation device for a multi-disk drive system, comprising: a chassis having a plurality of disk drive mounting positions internally; one or more cold plates fixed inside the chassis, wherein a coolant flow channel is provided in the cold plate; a manifold cold plate assembly including an inlet manifold cold plate and an outlet manifold cold plate, respectively connected to two ends of the flow channel of the cold plate, and configured to guide a coolant to flow into and out of the cold plate; a plurality of disk drive cartridges, each is detachably mounted in the chassis and accommodates one or more disk drives. Compared to traditional air cooling solutions, the device of the present disclosure can better cope with high thermal loads, ensuring that disk drives maintain good performance and stability under high-load operation conditions.

The invention discloses an oxygen concentration control method and system for an engine, and belongs to the technical field of engine power systems.The method comprises the steps that the current intake oxygen concentration, the current operation rotating speed and the current intake manifold pressure of the engine are collected; generating a target parameter correction instruction based on the current intake oxygen concentration, the current operation rotating speed, the current intake manifold pressure and a pre-constructed pulse spectrogram; and based on the target parameter correction instruction and a preset operation rotating speed fluctuation range threshold value, the engine is controlled to operate stably. According to the scheme, the intake oxygen concentration, the operation rotating speed and the intake manifold pressure of the engine are combined with the pulse spectrogram calibrated under the target oxygen concentration and the target air-fuel ratio, dynamic regulation and control of the operation parameters of the engine and closed-loop correction of the combustion state are achieved, the intake oxygen concentration and the air-fuel ratio of the engine can be accurately and stably controlled, and the engine efficiency is improved. And it is guaranteed that efficient and stable combustion of fuel oil of the engine can be achieved under different working conditions.

Title: Control Unit and Method for Determining Backfire in the Intake Manifold of a Hydrogen Engine. The control unit 118 determines backfire in the intake manifold 110 of the vehicle's hydrogen engine. The intake manifold includes the hydrogen injector 112 and a pressure sensor 114. The hydrogen engine includes the knock sensor 106. Gaseous hydrogen is injected through the hydrogen injector 112 and sent to the engine cylinder. The control unit 118 is configured to detect the first signal indicating a hydrogen flame in the intake manifold 110 via the flame sensor 116. The control unit 118 measures the second and third signals via the pressure sensor 114 and the knock sensor 106, respectively.Control unit 118 validates and determines the presence of backfire based on the correlation of the first signal with the second and third signals. After determining backfire, control unit 118 takes control measures that reduce its occurrence. Figure 1 for the summary.

The utility model belongs to the technical field of intake manifolds, and provides an intake manifold device for a compressed air system of a power station, which comprises a steam pocket, a reducer and a branch pipe, two ends of the steam pocket are respectively provided with an air inlet and a water outlet, the reducer comprises a first reducer and a second reducer, the first reducer is connected with the air inlet of the steam pocket, and the second reducer is connected with the water outlet of the steam pocket. One end, far away from the steam pocket, of the second reducer is connected with the drain valve; a plurality of branch pipe connecting ports are uniformly formed in the two sides of the steam pocket, each branch pipe connecting port is communicated with a branch pipe through a branch pipe seat, and one end, far away from the steam pocket, of the branch pipe is connected with a user pipeline through a branch valve. The utility model provides an intake manifold device for a compressed air system of a power station, which can enable all user pipelines of the compressed air system to be arranged in a centralized manner, realize integration, improve the space utilization rate and facilitate the operation of overhaul and maintenance.