60results about How to "Control air intake" patented technology

The invention discloses two-staged turbocharging system testing device and testing method. The components of an analogue turbocharging system are as follows: the outlet of an air compressor for simulating exhaust flow of an engine is sequentially connected with a filtering tank, a laminar flow meter, an intake control valve, a surge tank, a heater, an intake pressure regulating valve and high- and low-pressure turbines to empty; a branch pipe of an inlet pipe of the filtering tank is provided with a vent valve; a vortex side bypass-valve is connected between the inlet and the outlet of the high-pressure turbine; the outlet of a low-pressure gas compressor is sequentially connected with an intercooler, a high-pressure gas compressor, a second intercooler, a second surge tank, a second laminar flow meter and a back pressure regulating valve and then outputs pressurized air; a pressure side bypass valve is connected between the inlet and the outlet of the high-pressure gas compressor. The gas temperature, pressure and flow are adjusted in a plurality of manners; the pre-vortex pressure and the temperature gradient are tested by transient pressure and temperature sensors; theoretical basis and data support are provided for a transient control strategy.

The invention discloses a detection device for detecting air tightness of an air-tight door of a nuclear power plant by using a constant pressure method. The detection device comprises an air tightness testing box body and a testing system, wherein a testing opening is formed in the air tightness testing box body; a tested part is arranged on the testing opening; the testing system comprises a digital adjuster; a flexible sealing glue ring is cast between the testing opening and the tested part; an air inflation cavity is defined by a sealing ring, the testing opening, the tested part and the sealing glue ring jointly; the digital adjuster is used for adjusting the opening of a pneumatic adjusting valve and the opening of an inflation control valve according to the air pressure tested by a pressure transmitter to enable the air pressure inside the air tightness testing box body to be equal to the designed pressure intensity of the tested part and enable the air pressure inside the air inflation cavity to be approximate to that inside the air tightness testing box body. The detection device has the advantages that the structure is simple, the use is convenient, the automation degree is high, the air tightness of the tested part can be calculated quantitatively, and the leakage of non-testing gases is reduced.

The invention discloses a gear shifting manipulator of an automobile synchronizer testbed and a control device of the gear shifting manipulator. The gear shifting manipulator comprises a mounting bottom plate and a four-bar mechanism which is formed by hinge joint of a gear selecting shaft, a gear shifting rocker arm, a middle connecting bar and a gear shifting support bar, the gear selecting shaft is rotatably mounted on the mounting plate, an output shaft of a gear selecting motor is in transmission connection with the gear selecting shaft, a gear shifting air cylinder is hinged between the gear selecting shaft and the gear shifting rocker arm, a gear shifting connection bar is hinged to the upper end of the gear shifting support bar, and a tensile pressure sensor and angle sensors are arranged on the four-bar mechanism respectively. The control device comprises an MCU (micro control unit) and a human-computer interface LCD (liquid crystal display). The gear shifting manipulator is electrically connected with the MCU via the tensile pressure sensor and the angle sensors. The MCU is electrically connected with a gear shafting electromagnetic valve of the gear shifting air cylinder and the gear shifting motor. The human-computer interface LCD is in communication connection with the MCU. The gear shifting manipulator of the automobile synchronizer testbed and the control device of the gear shifting manipulator have the advantages of simplicity in operation, high positioning precision, precise controllability, stability in operation and capability of simulating a gear shifting effect of a human hand better.

The invention discloses a device and method for detecting the combustion characteristic of tail gas containing high-concentration CO. The device consists of a gas distribution induction system, a combustion system, a data acquisition processing system and a smoke discharge system. In the invention, a combustion chamber of the combustion system adopts a heat-insulation combustion mode, and a good heat insulation effect is realized; the system is uniform and stable; as the smoke discharge system is arranged in the device, the safe operation of the detection is ensured; research on the combustion characteristic of the tail gas with different CO components can be performed, and the research on the combustion characteristic of the tail gas can be performed in laboratories and production practice; and the device has the advantages of high feasibility, flexible detection mode, simple process, high safety, good stability and the like, and can be used for controlling the air input and air ratio.

The invention discloses a valve stroke variable adjusting system, which comprises a valve mechanism, a valve transmission set, a hydraulic gap adjustor and an adjustor power source, wherein the valve transmission set consists of a rocker arm bearing, a finger-shaped rocker arm and a camshaft; the camshaft is fixed on an engine cylinder through a bearing; one end of the finger-shaped rocker arm is provided with an arc groove and is in contact connection with the head of a plunger of the hydraulic gap adjustor; the middle section of the finger-shaped rocker arm is provided with the rocker arm bearing which is in rolling contact with the camshaft; the other end of the finger-shaped rocker arm is finger-shaped and presses a valve; and the camshaft rotates to drive the finger-shaped rocker arm to swing around the head of the plunger so as to control the valve to open or close. A step motor drives the hydraulic gap adjustor to move and the opening of the valve is changed, so that the air inflow is controlled, and the fuel efficiency is improved. The rocker arm bearing can reduce the impact and vibration in the transmission process and reduce noise.

The invention discloses an air inlet passage and impeller gap adjusting structure. The structure comprises a volute, an air inlet passage, an impeller, a displacement sensor, a servo screw motor and anut, wherein the air inlet passage is arranged in an inner hole of the volute, a certain gap is kept between the air inlet passage and the impeller, the air inlet passage is coaxial with the volute and the impeller, the displacement sensor is arranged in the air inlet passage, the nut is arranged on the air inlet passage, the servo screw motor is arranged on the upper end face of the volute, andthe outer end of a screw of the servo screw motor is connected with the nut. According to the structure, the motor forward and reversely rotates to drive the nut to ascend or descend, the nut drives the air inlet passage to ascend or descend, the ascending gap of the air inlet passage becomes large, and the descending gap of the air inlet passage becomes small, so that the air inlet amount is controlled, the surge of a system is controlled, and the structure is simple and effective.

The invention discloses an intelligent umbilicus moxibustion instrument. The intelligent umbilicus moxibustion instrument comprises an upper cover and a lower cover, wherein structures of two layers,i.e., an upper layer and a lower layer are arranged inside the lower cover, the upper layer serves as a moxa stick combustion zone, the lower layer serves as a positive-pressure moxibustion zone and anegative-pressure cupping zone, and the positive-pressure moxibustion zone and the negative-pressure cupping zone are of gap distribution in the same planar interval so as to achieve synchronous proceeding of moxibustion and cupping; and a spherical metallic mirror surface is arranged at the top of the moxa stick combustion zone, an optical reflection mirror surface of the spherical metallic mirror surface is of a parabolic type dome structure, the spherical metallic mirror surface takes an acupoint area of skin as a focusing point, and a photo-thermal reflecting plate is arranged at the bottom of the moxa stick combustion zone. According to the intelligent umbilicus moxibustion instrument provided by the invention, constant-temperature atmospheric moxibustion and constant-negative-pressure cupping can be achieved synchronously; overall photo-thermal re-focusing after combustion of moxibustion consumables can be achieved; integrated cooperation of a variety of common external therapymethods based on thermal moxibustion can be achieved; the intelligent umbilicus moxibustion instrument is environmentally friendly and smokeless; and the intelligent umbilicus moxibustion instrument has a variety of virtual and imitated intelligent functions.

The invention relates to the field of automobile accessory manufacturing, in particular to a cross-shaped shaft grinding and clamping device. The cross-shaped shaft grinding and clamping device comprises a machine tool main shaft and a machine tool guide rail. The machine tool main shaft is fixedly connected with a cross-shaped shaft clamping structure. The cross-shaped shaft clamping structure comprises an installing base, a positioning assembly and clamping assemblies. The installing base is provided with an installing hole, grooves are formed in the side wall of the installing hole, and theclamping assemblies are arranged in the grooves. Each clamping assembly comprises a wedged block, a clamping block, a fixing rod, a swinging rod, a first movable rod and a second movable rod, whereinthe first movable rod and the second movable rod are provided with reset springs between the inner walls of the corresponding groove. A tail base is fixedly connected to the machine tool guide rail and comprises a pneumatic tip, a drive assembly and a sliding sleeve. The drive assembly is located on one side of the tail base and used for driving the pneumatic tip to horizontally move, and the tail base is further provided with a cross-shaped shaft rotation structure making the cross-shaped shaft rotate. The cross-shaped shaft grinding and clamping device can automatically clamp the cross-shaped shaft, and the cross-shaped shaft machining efficiency is improved.

The invention provides an air-inlet grille, a system, an automobile and a control method. The air-inlet grille comprises a support, a grille blade set and a rotation driving mechanism, the support comprises a frame structure, an air inlet is formed in the middle of the frame structure, the grille blade set is arranged at the air inlet and comprises at least one grille blade, at least one end of each grille blade is movably connected with the frame structure, the grille blades can rotate around connecting points of the grille blades and the frame structure, the air input of the air inlet is changed when the rotation angles of the grille blades are changed, and the rotation driving mechanism is used for controlling change of the rotation angles of the grille blades and connected with the grille blades. Control of the air input of an engine cabin can be enhanced, time consumed by an engine reaching a proper working temperature can be reduced, and oil consumption and discharged pollutantsare decreased.

The invention discloses a transformer oil gassing device which comprises a sampler, a quantifying pipe, a vacuum chamber, a pneumatic chamber, a compressor, a fixed gas valve and a pressure controller, wherein the upper end of the sampler is connected with a transformer through an oil inlet valve, and the lower end of the sampler is connected with the upper end of the vacuum chamber through a degassing communicating valve; the upper end of the vacuum chamber is connected with the transformer through an air cylinder valve and an oil discharge valve, and the lower end of the vacuum chamber is matched with the pneumatic chamber through a piston rod; the outer end of the quantifying pipe is connected with a carrier gas valve, and the inner end of the quantifying pipe is connected with the vacuum chamber; the pressure controller is connected with the gas outlet of the compressor, the inlet end of the fixed gas valve is connected with the pressure controller, and the outlet end of the fixed gas valve is connected with the pneumatic chamber through an air cylinder upward valve and an air cylinder downward valve. According to the transformer oil gassing device, an oil pump is eliminated, so that the equipment cost is greatly reduced; due to the elimination of the oil pump, the oil getting way is changed, the forced oil circulation is no longer used, instead an oil sample in an oil inlet pipeline is extracted by the vacuum chamber, oil is discharged after being separated from gas, and a new oil sample is obtained.

The invention discloses an oxygen supply and thermal insulation device and a flammable gas combustion chamber with the same. After being inlaid in an inlet of the combustion chamber, the oxygen supply and thermal insulation device connects an inner cavity of the combustion chamber with a flame jetting opening of a combustion device. The oxygen supply and thermal insulation device comprises a gas inlet cylinder formed by mutually nesting an inner cylinder and an outer cylinder. An oxygen supply pipe is inserted between the inner cylinder and the outer cylinder, and the space between the inner cylinder and the outer cylinder is filled with temperature-resistant castable. The inner cylinder, the outer cylinder and the oxygen supply pipe are mutually fixed through supporting rings. A pipe cap used for adjusting the gas inflow of the combustion chamber is installed at the gas inlet end of the oxygen supply pipe. According to the oxygen supply and thermal insulation device and the flammable gas combustion chamber with the same, flammable gas can be fully burnt, and the burning temperature can be above 1000 DEG C, so that energy in the flammable gas can be fully used. Through a special sealing structure at the inlet of the combustion chamber, heat loss is avoided, so that heat energy generated by burning the flammable gas is used furthest. In addition, the inlet of the combustion chamber is welded in a sealed mode through a hubbed flange structure, so that the functions that the service life of the combustion chamber, the gas inlet cylinder and other parts is prolonged are achieved.

The invention discloses an air inlet system of an LNG natural gas engine. The air inlet system comprises an air supply subsystem, an LNG natural gas supply subsystem and a mixer, wherein the air supply subsystem comprises an air filter, an exhaust gas turbocharger, an intercooler and an electronic throttle valve which are connected sequentially, and the electronic throttle valve is used for controlling the air supply amount after cooling; the LNG natural gas supply subsystem comprises an LNG gas bottle, a vaporizer, a voltage stabilizer, a buffer tank, a lower pressure filter, a lower pressure fuel stop valve and an electronic control gas track assembly which are connected sequentially, LNG enters the electronic control gas track assembly for accurate control after vaporization, voltage stabilization, buffering and filtering, the mixer is used for mixing air flowing through the electronic throttle valve and natural gas flowing out of the electronic control gas track assembly and then supplies the mixture to an inlet branch pipe, and the inlet branch pipe is communicated with an inlet valve of an engine cylinder. The air inlet system can accurately and safely control the natural gas and the air, and the air inlet requirement of the LNG natural gas engine can be met.

The invention discloses an air filter choke valve device of a gasoline engine. According to the device, a choke valve plate is inserted into an air filter body; due to the fact that positioning through holes matched with a telescopic elastic positioning device are formed in the choke valve plate, the telescopic elastic positioning device is clamped into the different positioning through holes to position the choke valve when the choke valve plate is controlled to move, further, the choke valve blocks air inlets of the air filter body at different degrees, and air inflow of the air filter body is accurately and conveniently controlled. In addition, an oil bubble pump and a carburetor are separated, the oil bubble pump is installed on the top of the air filter body, inconvenience caused by integrated operation of the oil bubble pump and the carburetor is avoided, and oil mass of the oil bubble pump can be conveniently observed.

The invention discloses a plastic film unfolding frame. The plastic film unfolding frame is mainly composed of an opening device, a cutter, a cutter supporting column, a circular truncated cone unfolding device, an air inlet pipe, a supporting frame, an unrolling roller and a rolling roller all of which are arranged in a line shape. The cutter is located at the middle position of the opening device. The opening device is in a tongue shape and is fixedly connected with the circular truncated cone unfolding device. The front end of the opening device is provided with air holes, and the surface of the circular truncated cone unfolding device is provided with air holes. The circular truncated cone unfolding device is fixed to the supporting frame. The supporting frame is provided with slidingrails. The air inlet pipe is connected to the rear part of the unfolding device. The unrolling roller is located in front of the opening device and is parallel to the opening device and guides a plastic film to enter the unfolding frame, and the purpose of blowing the double-layer film can be achieved through ventilation of the air holes in the front end. By means of the plastic film unfolding frame, same journey in the unfolding process of the film parts can be guaranteed, meanwhile, the contact area of the film and the unfolding frame is reduced through an air film, the problem caused by being pulled of the film in the process is avoided, and the quality level of the film is improved.

The invention provides a smoke dust processing method and device. According to the smoke dust processing method, a power plant drives the tail end of a hose to swing so as to discharge smoke in the hose from the tail end of the hose. The smoke dust processing device comprises the power plant connected with the tail end of the hose, and the other end of the hose is connected with a smoke inlet. Preferably, the power plant is equipment with adjustable power. With adoption of the smoke dust processing method and device, smoke is stably discharged through swinging the tail end of the hose and the smoke discharging effect is excellent.

The invention discloses a biological safety type monkey negative pressure isolation device. The biological safety type monkey negative pressure isolation device comprises an isolation box body, an airfiltering unit, a power ventilation unit and a control unit, wherein the isolation box body is provided with a box door; the box door is hinged to the isolation box body; a plurality of isolation cages are arranged in the isolation box body, and a sliding door is arranged on the side, close to the isolation cages, of the box door; the sliding door is connected with the isolation box body in a sliding mode; an excrement tray is arranged at the bottom of each cage and communicates with an inner cavity of each isolation cage; and a sealing bag is connected to the bottom of the sliding door. According to the biological safety type monkey negative pressure isolation device, the interior of the isolation box body is in a negative pressure state, when the box door and the sliding door are opened, directional flowing of air can be effectively guaranteed, and harmful gas in the isolation box body is prevented from leaking out; meanwhile, when the excrement of the experimental animal is transferred, the excrement tray directly enters the sealing bag, the sealing bag is subjected to disinfection sterilization after being sealed, and high-concentration harmful organism aerosol in the excrement tray is effectively prevented from leaking to the environment outside an isolator.

The invention discloses a thermal treatment furnace for steel wires, and relates to the technical field of thermal treatment of the steel wires. The front of a heating section is arranged to be of a hot air type structure, a front nozzle is a hot air nozzle, and the input end of the nozzle is connected to air pipes and gas pipes; the rear of the heating section is arranged to be of a premixing type structure, a rear nozzle is a premixing nozzle, and the air pipes and the gas pipes are connected to a pre-mixer and then are connected to a premixing nozzle through mixed gas pipes; a furnace body is provided with a discharge flue, and the discharge flue is provided with an induced draft fan. When the external atmospheric pressure changes, the induced draft fan still can maintain certain gas displacement, and therefore smoke inside the furnace can become stable, the atmospheric pressure can keep stable, and the thermal treatment effect of the steel wires can be guaranteed. In addition, the hot air type structure and the premixing type structure are matched, the furnace atmosphere can be accurately controlled, the oxidation degree of the steel wires can be lower, the waste heat of the smoke can be fully utilized, and the energy utilization rate can be increased.

The invention discloses shoes with ventilating, waterproof and dustproof functions. Both a look-ahead fabric and a look-back fabric are designed to be of a multi-layer structure with a lining layer, filling cotton, a PTFE film and a wear-resisting fabric layer. Waterproof and breathable effects of the look-ahead fabric and the look-back fabric are realized by utilizing the PTFE film, and the lining layer is made of alginate fibers and polyester fibers according to the proportion of 1: 1. The component is made by blending, the alginate fiber has a strong antibacterial effect, the breeding of bacteria in the shoes can be inhibited, foot health of a user is protected, the alginate fibers can release infrared rays, the foot blood circulation of the user is promoted, the physiological functionof the human body is more active, an air inlet valve assembly is mounted on the outer wall of the heel tendon of the back view fabric, the air bag with the exhaust supporting strip is embedded in theupper end of the sole, the check valve and the air inlet pipe are communicated with the air inlet valve assembly, the air bag is driven to deform through limb movement during walking, external air iscompressed and then exhausted through the exhaust supporting strip, rapid ventilation in the shoe is achieved, it is guaranteed that the interior of the shoe is breathable, dry and comfortable, and the shoe is convenient to use and practical.

The invention discloses a composite membrane bioreactor with low energy consumption. The composite membrane bioreactor includes a reaction tank. Four corners of the outer wall of the bottom of the reaction tank are respectively provided with vertically-arranged support columns by bolts; the outer walls of the bottoms of the support columns are provided with supporting seats by the bolts; a same horizontally-arranged support plate is disposed among the four support columns by the bolts; the outer wall of the top of the support plate is provided with a water tank by the bolts; the outer wall ofone end of the water tank is provided with a water outlet pipe through a bolt; and the top of the inner wall of one side of the water tank is provided with a liquid level sensor through the bolt. Thecomposite membrane bioreactor performs a composite membrane biological reaction in the reaction tank; aeration is performed through an aeration head connected with an aeration draught fan; and a dissolved oxygen instrument is installed, the oxygen concentration of wastewater in the reaction tank is detected at any time, and the dissolved oxygen instrument is connected with an electromagnetic valvethrough a processor, and therefore, the air input of an aeration pipe is controlled, resources are rationally utilized, and the energy consumption of the composite membrane biological reaction is reduced.

The invention discloses an intelligent self-adaptive pressure swing adsorption nitrogen making machine. The nitrogen making machine comprises a nitrogen making machine body, an air compressor, a nitrogen purification device and a nitrogen storage box. A gas inlet of the nitrogen making machine body is fixedly connected with a first connecting pipeline; the other end of the first connecting pipeline is fixedly connected with the gas outlet end of the air compressor; a connecting branch pipe is fixedly connected to the side face of the first connecting pipeline; a pressure detector is fixedly connected to the top of the connecting branch pipe; a first flow limiting control valve is arranged at the position, close to the nitrogen making machine body, of the side face of the first connecting pipeline; and the gas outlet end of the nitrogen making machine body is connected with the nitrogen purification device through a pipeline. According to the nitrogen making machine, flow limiting control valves are arranged at the two ends of the nitrogen making machine, and the pressure detector is further arranged on one side of the first flow limiting control valve, so that the gas inlet amountand the gas outlet amount of the nitrogen making machine can be well controlled, and the purity of the nitrogen making machine can be guaranteed.

The invention provides a rotational flow electronic cigarette atomizer structure and a rotational flow electronic cigarette atomizer thereof, and belongs to the technical field of electronic cigarettes. The rotational flow electronic cigarette atomizer structure and the rotational flow electronic cigarette atomizer thereof comprise a shell assembly and an internal assembly. A connecting piece is connected to the bottom end of a base, a first air inlet hole is formed in the base, and a cigarette holder piece is connected to the upper end of a second cylinder body. An atomizing device is arranged in a first cylinder body, a tobacco tar storage area is arranged between the atomizing device and the first cylinder body, a rotational flow pipe is arranged above the atomizing device, the rotational flow pipe is arranged in the second cylinder body, an air inlet channel is formed in the rotational flow pipe, and a third air inlet hole is formed above the rotational flow pipe. The linear form of airflow can be changed favorably, the flowing range of tobacco tar can be enlarged favorably, tobacco tar particles can be separated and recycled favorably, and smoking discomfort and tobacco tar waste are reduced.

The invention discloses an exhaust assembly of a water-drive and non-electric exhaust fan. The exhaust assembly comprises an exhaust shell and an exhaust inner cylinder. The lower end of the exhaust inner cylinder is cylindrical, and the upper end of the exhaust inner cylinder is conical. The upper layer of the exhaust inner cylinder is provided with a fixing blade which is connected with the exhaust shell, and the lower layer of the exhaust inner cylinder is provided with a guide wheel blade which is connected with the exhaust shell. An impeller is driven to rotate through circulating of circulating fire fighting water in a ship body. The shape of concave blades in a turbine shell is improved, and therefore the conversion rate of water kinetic energy is improved, exhaust wind pressure is improved accordingly, and the ventilation distance of air in the ship body can be effectively increased by 30 meters.

The invention relates to an integrated stepping water-feeding type multistage A / O intensifying denitrification device. A tank is arranged as three-layer and more coaxial cylinders or cuboids; an inner layer chamber is communicated with the bottom of a middle layer chamber, so as to form a hydrolysis acidification tank; folded plates are arranged in an outer layer chamber, so that the outer layer chamber is separated into six and more cabinets; all the areas of the outer layer chamber are filled with floating balls, so as to form a multi-stage baffling floating biochemical tank; the hydrolytic acidification effluent flows into an O1 aerobic zone, an A1 anoxic zone, an A2 anoxic zone and an A3 anoxic zone under the effect of gravity in a stepping water-feeding manner; the effluent flows out from an effluent weir at the upper end of the last stage of aerobic zone. The invention adopts the integrated stepping water-feeding type multistage A / O intensifying denitrification device, with a multilayer coaxial cylinder or cuboid structure combined with anaerobic catalytic oxidation, stepping water feeding and multi-stage baffling floating biochemistry; the treating process is free from the mixed liquor backflow, sludge backflow and back wash operation processes; the required mechanical equipment is few; the operation management is simple; the unattended operation can be realized.

The invention discloses a wire coil capable of intelligently and automatically distributing a bundling rope by using a wire roller for a large-scale distribution box. The wire coil comprises a fixed base, wherein a base groove is formed in the fixed base; a first support disc connected to the fixed base is arranged in the base groove; a first rotary shaft which is driven by a motor is arranged in the base groove; a rotating second rotary shaft and a third rotary shaft are arranged on the first support disc; a rotating wire distribution rotary disc is arranged on the fixed base; wire distribution sliding blocks corresponding to support cylinder through grooves are arranged on a second support disc; wire distribution cylinders are respectively arranged on the wire distribution sliding blocks; sliding bundling ropes are respectively arranged in the wire distribution cylinders, and the wire distribution cylinders can be further clamped on the cables through sliding the wire distribution sliding blocks, so that the cables are further bundled by utilizing the bundling rope, the trouble caused by manually penetrating and inserting the bundling ropes is avoided, and the working efficiency can be further improved.

The invention relates to the technical field of glass production, in particular to a blowing device for glass manufacturing. The device comprises four supporting legs, wherein the tops of the four supporting legs are fixedly connected with a base; an isolation plate is fixedly connected to the top of the base and close to the center of the right side; a through groove is formed in the center of the inner wall of the isolation plates a placement plate is fixedly connected to the center of the top left side of the base; a groove is formed in the center of the top of the storage plate; an airbagis fixedly connected to the left side of the inner wall of the groove. Through the air bag and the connecting pipe,a worker can press the air bag so that air in the air bag is exhausted, enters a sleeve from a rubber hose and finally enters a glass product, and therefore blow molding is conducted on the glass product, the traditional manual blow molding mode of the glass product is replaced, manual labor is reduced, and meanwhile the air inflow of the glass product can be accurately controlled through the air bag.

The invention relates to the technical field of unmanned aerial vehicles, in particular to an electronic injection valve body assembly and an unmanned aerial vehicle. The electronic injection valve body assembly comprises an electronic injection valve body, a throttle valve shaft is rotationally arranged in the electronic injection valve body, and a throttle valve blocking piece used for adjusting the opening degree of an electronic injection valve is fixedly arranged on the throttle valve shaft; and the steering engine shell is connected with the electronic injection valve body in a sealed mode, a steering engine is fixedly arranged in the steering engine shell, and the steering engine is connected with the throttle valve shaft through a transmission structure. According to the arrangement mode, the steering engine is arranged in the steering engine shell, and the steering engine shell is hermetically connected with the electronic injection valve body, so that water and dust can be prevented, and the reliability of the engine is improved. Meanwhile, the steering engine directly drives the throttle valve shaft to rotate through the transmission structure, the response speed of the throttle valve can be increased, and the air inflow of the engine can be more accurately controlled.

The invention discloses an electronic air spray valve. When a current signal is transmitted by an electronic control unit, an electromagnetic coil is energized, electromagnetic force is generated, work is done by overcoming the elastic force of an elastic restoring piece, an armature and a valve head are picked up, the electronic air spray valve is opened at the moment and high-pressure air enters a valve body from a high-pressure air inlet at the tail of the valve body, is sprayed out through a high-pressure air outlet and enters an air cylinder; and when the current signal transmitted by the electronic control unit is cut off, the electromagnetic coil is de-energized, the electromagnetic force is released, the armature and the valve head are restored under the effect of the elastic force of the elastic restoring piece, the electronic air spray valve is closed, a complete air inlet process is completed and the air inlet amount can be controlled through the length of electronic pulses. Therefore, the electronic air spray valve has the advantages that the parts such as an air valve assembly are omitted, the air inlet structure is simplified, the power loss caused by complex connection is avoided and the air inlet amount can be effectively controlled. The invention additionally discloses an engine and an air inlet system of the engine, wherein the air inlet system uses the electronic air spray valve.

The invention relates to the technical field of engines, and provides an engine control method and device. The engine control method comprises the steps that the rotating speed and the load of an engine are detected; whether a variable valve timing mechanism of the engine meets an actuation condition or not is judged; when the variable valve timing mechanism does not meet the actuation condition, the common air-fuel ratio of the engine is controlled to be reduced according to the rotating speed and the load of the engine so as to obtain a first air-fuel ratio; and the engine is controlled to operate at the first air-fuel ratio. The engine performance can be improved.