45 results about "Air flow meter" patented technology

The invention belongs to the technical field of aluminum electrolysis, and particularly relates to an electrolytic aluminum oxide concentrated phase conveying solid-gas ratio monitoring system and method, and the system comprises a control system, a material tank system, a compressed air system and a concentrated phase conveying system; the output end of the charging bucket system is connected with the input end of the concentrated phase conveying system; the output end of the compressed air system is connected with the charging bucket system and the concentrated phase conveying system; an air flow meter is mounted on the compressed air system, a weighing sensor is mounted on the charging bucket system, and the control system calculates and controls the solid-gas ratio through the air flow meter and the weighing sensor; the solid-gas ratio is calculated and controlled through the control system, and the working efficiency is improved.

The present application relates to the technical field of fuel cell, in particular to a fuel cell system and a vehicle, the present application constructs fault-tolerance control, so that after the flowmeter failure, the way of directly giving up the judgment of air flowmeter is abandoned, and the pressure data and temperature data are used for judgment, so that the air system control can still be normally operated, the actual stack flow pressure is maintained in the target range, and the normal operation of the fuel cell is realized.

The application provides a methanol reforming hydrogen production device test bench, and relates to the technical field of new energy sources.The methanol reforming hydrogen production device is connected with an air supply branch, a methanol water vapor supply branch, a heating branch, a reforming gas treatment branch and a temperature measurement branch.The air supply branch comprises a blower, an air flow meter and a temperature sensor 1.The methanol water vapor supply branch comprises a constant flow pump 1, a liquid flow meter 1 and a temperature sensor 2.The heating branch comprises a constant flow pump 2, a liquid flow meter 2, a temperature sensor 3 and a temperature sensor 4.The temperature measurement branch comprises a temperature sensor 5, a temperature sensor 6, a temperature sensor 7 and a temperature sensor 8.Feedback regulation is realized through the cooperation of a plurality of constant flow pumps, a plurality of liquid flow meters, a blower, an air flow meter and other controllable actuators and sensors, so that the reactant flow entering the methanol reforming hydrogen production device can be accurately controlled, and quantitative analysis on the performance of the methanol reforming hydrogen production device can be realized.

The utility model belongs to the fuel cell air compressor test field, and especially relates to a controllable humidity hydrogen fuel cell system single-stage air compressor test bench comprising an air filter used for inputting air; the first-stage temperature and humidity control box realizes temperature and humidity control based on electric heating and water spraying and is connected to the air filter; the second-stage temperature and humidity control box realizes temperature and humidity control based on a mold temperature controller and water spraying and is connected to the first-stage temperature and humidity control box; the air inlet pressure control valve is connected to the second-stage temperature and humidity control box; the air flow meter is connected to the air inlet pressure control valve; the single-stage air compressor is connected to the air flow meter; the first intercooler is connected to the single-stage air compressor; the dehumidification control box achieves dehumidification based on cooling of the mold temperature controller and is connected with the first intercooler. The exhaust control valve is connected to the dehumidification control box; a muffler connected to the exhaust control valve; and the inversion module is electrically connected to the single-stage air compressor, so that a humidity-controllable hydrogen fuel cell system single-stage air compressor test scheme is realized.

The invention discloses a control method for remote fault diagnosis and processing of a fuel cell air flow meter. The running condition of the fuel cell system can be monitored in real time, a fault detection mode in power-on self-test of parts such as an air flow meter is activated when the fuel cell is powered on, whether a fault exists or not is judged within the specified time, if no fault exists, a normal mode is entered, and a PID closed-loop control mode is adopted, so that the fault detection efficiency is improved. If a fault exists, entering a fault mode, and adopting an interpolation look-up table calculation mode to quickly compare and select a target value of pressure output according to the calibrated change curve data of the fuel cell current relative to the air inlet pressure of the electric pile, so as to ensure the quick and accurate implementation of the processing method; according to the invention, a full-life-cycle management mode of the air flow meter is realized through a power-on self-test-dual-algorithm mode switching-cloud cooperation three-level architecture, so that the state of the air flow meter is detected and diagnosed in real time, the state is controlled, prevention is carried out in advance, maintenance is carried out in time, and the operation smoothness is guaranteed.

The utility model discloses an air volume adjusting device of a constant-displacement air conditioner, which relates to the technical field of air volume adjustment of air conditioners, and comprises a constant-displacement air inlet air conditioner, one end of the air inlet air conditioner is communicated with an air flow meter through a pipeline, and the other end of the air inlet air conditioner is communicated with a precision filter through a pipeline, adjustable electric valves are mounted on a pipeline between the air inlet air conditioner and the air flow meter and a pipeline between the air inlet air conditioner and the precision filter, and the other ends of the adjustable electric valves between the air inlet air conditioner and the air flow meter are connected with an air pump through pipelines; according to the utility model, a part of air is pumped out from the rear part of the system through the air pump and is injected into the pipeline between the air inlet air conditioner and the air flow meter, so that the purpose of increasing the air volume is achieved under the condition that the displacement of the air inlet air conditioner is not changed, and the air flow in the brake emission measuring instrument is controlled through the opening degree of the two adjustable electric valves.

The utility model discloses an air compressor integrated system which comprises an air compressor main body, an air inlet is formed in one end of the air compressor main body, an air flow meter and a temperature and pressure sensor are arranged at the air inlet, an outlet of the air compressor main body communicates with an inlet of an intercooler, the intercooler is arranged above the air compressor main body, and the air flow meter and the temperature and pressure sensor are arranged on the air compressor main body. An outlet of the intercooler and the air inlet are located on the same side, and a temperature sensor is arranged in the intercooler. The intercooler, the flow meter, the temperature and pressure sensor and the air compressor are integrated into a whole, so that the space occupied by an air pipeline in a system is greatly reduced, and the complexity of a special-shaped rubber pipe is reduced.

A pressure difference detection device, for a particulate collection filter, includes an upstream pressure sensor, a downstream pressure sensor, an air flow meter, a low-pass filter, a processed differential pressure value acquiring unit, an intake air amount correcting unit, and an actual differential pressure value acquiring unit.

The invention belongs to the technical field of fuel cell engines. The air system comprises an air compressor, an intercooler, a humidifier, an electric pile outlet air stop valve, an electric pile inlet air stop valve, a humidifier bypass valve, a fuel cell air inlet bypass valve, a back pressure valve, an air flow meter, an intercooler rear pressure sensor, an electric pile inlet pressure sensor and an electric pile inlet temperature sensor. The stack outlet temperature sensor, the sensor assembly for the bench test, the mass spectrometer for the bench test, the air inlet pipeline and the air outlet pipeline are detachable parts, and the sensor assembly for the bench test and the mass spectrometer for the bench test are used for the bench test and are detached after the test is finished. According to the invention, the detachable sensor assembly and the mass spectrometer are additionally arranged in the air system, and interlocking optimization is carried out by combining a bench test control method and a performance calculation result, so that the accuracy of a bench test result is ensured, the battery pack is protected, the calibration method has very important significance in the calibration process of the fuel cell engine, and the cost is saved.

The utility model relates to a detection system for a gas water heater, which comprises a gas passage communicated with a gas inlet of the gas water heater, and a gas proportional valve is arranged in the gas water heater; the compressed air channel is communicated with an air inlet of the gas water heater, the compressed air channel and the gas channel can be selectively opened, the compressed air channel is provided with a first pressure regulating valve and an air flow meter used for detecting simulated air flow, and the air flow meter is arranged on the downstream of the first pressure regulating valve; and the controller is electrically connected with the first pressure regulating valve, the air flow meter and the gas proportional valve. The method has the advantages that the heat load of the gas water heater can be determined without gas combustion in a manner of replacing gas with compressed air; in addition, the compressed air flow is converted into the gas flow, so that the opening degree of the gas proportional valve can be adjusted according to the converted gas flow, and the gas water heater can reach the determined heat load.

The utility model provides a maximum output judging and adjusting device for a medium-speed coal mill, and belongs to the field of coal mills. Comprising a current monitoring device, a pulverized coal fineness monitoring device, a differential pressure gauge, an air volume meter, a cold air control valve, a hot air control valve and a dynamic separator, the air volume meter, the cold air control valve and the hot air control valve are installed at an inlet of the coal mill, the pulverized coal fineness monitoring device is installed at an outlet of the coal mill, and the differential pressure gauge is used for measuring the pressure difference between the inlet and the outlet of the coal mill; comprising a hydraulic oil station and a loading force proportional overflow valve, the output end of the hydraulic oil station is connected to the input end of the loading force proportional overflow valve, and the output end of the loading force proportional overflow valve is connected to the coal mill. According to the utility model, monitoring data can be acquired in real time through the current monitoring device, the pulverized coal fineness monitoring device and the differential pressure gauge and whether the coal mill reaches a preset upper limit is judged so as to ensure the operation safety of the coal mill, and the maximum output of the coal mill can be adjusted in real time by adjusting the loading force proportional overflow valve, the dynamic separator and the hot air control valve.

The application discloses a kind of automobile air flow meter devices, it is related to the technical field of measuring device, including: flowmeter main body, for detecting the air flow in air pipe inside;Communication component is connected with the flowmeter main body, for cutting off or restoring the flow channel of pipeline medium by its rotation;Limiting component is located above communication component, for limiting and fixing flowmeter main body;Specifically, maintenance personnel only need to rotate knob, can make rotary seat rotate, realize the misplacement of the channel of communication pipe two ends and the docking plate connecting port, effectively prevent external dust and impurities from entering air intake system, this operation simultaneously drives positioning rod to move, by loosening locating bolt, the limiting hole in the inside of rotating disc can be rotated and aligned with flowmeter, flowmeter main body is ejected from docking interface under the action of spring, and maintenance personnel can easily take out flowmeter main body to replace or maintain.

Accurately determine the lifespan of the filter. [Solution] The fuel cell system 20 is equipped with an air flow meter 31 that detects the flow rate of air that has passed through the air cleaner 23 and before it is drawn into the air compressor 22. The fuel cell system 20 is equipped with a higher-level ECU 33. The higher-level ECU 33 functions as an integrated value calculation unit that calculates the integrated value of the air flow rate detected by the air flow meter 31, a collected dust amount calculation unit that calculates the amount of dust collected by the filter 29 by multiplying the calculated integrated value by a dust concentration preset based on the operating environment, and a notification unit that notifies when the calculated collected dust amount exceeds a collection allowance which is a preset threshold.

The application discloses a fuel cell system and a self-cleaning control method thereof, and belongs to the technical field of fuel cell systems. The system comprises an air filter, an air flow meter, an air compressor, a middle cooler, an air stop valve, an air bypass valve, a humidifier, a temperature-humidity-pressure integrated sensor, a back pressure valve, an air path-to-cooling path electric valve, a cooling path-to-air path electric valve, an inlet hydrogen electromagnetic valve, a hydrogen supply module, a hydrogen pressure sensor, a water distributor, a hydrogen circulation pump, an anode hydrogen discharge valve, an anode water discharge valve, a hydrogen path-to-cooling path electromagnetic valve, a cooling path-to-hydrogen path electromagnetic valve, a cooling path outlet temperature-pressure integrated sensor, a cooling path water pump, an electric three-way valve, a deionizer, a PTC heater, a cooling path inlet temperature-pressure integrated sensor, a water discharge valve, a radiator module, a water supplement tank, a tail exhaust pipe, a stack, an external water storage tank and a water supplement pump. The application can realize self-cleaning control of the fuel cell system, prolong the service life and improve the maintenance convenience.

This air flow rate meter comprises an enclosure having an auxiliary passage and a circuit chamber, and a flow rate detection sensor. The flow rate detection sensor has a diaphragm in which a flow rate detection unit is formed on a main surface, a recessed section formed on the reverse-surface side of the diaphragm, and a package part having a first package section and a second package section, the first package section being positioned in the auxiliary passage, and the second package section being positioned in the circuit chamber. An airflow passage linked to the recessed section is formed in the interior of the package part. The recessed section communicates with the auxiliary passage via a plurality of ventilation pathways that communicate with the auxiliary passage via the airflow passage.

The invention discloses an engine stepless continuous in-cylinder braking method based on dynamic closed-loop control, and relates to a vehicle braking control system or a component thereof, when a vehicle operation condition is a braking condition, the braking power P1 is calculated by combining the stress condition of the vehicle under the current operation condition; dynamic braking demand calculation correction is conducted on the braking power P1 to obtain corrected braking power P2, the corrected braking power P2 is converted into a negative torque control pulse spectrum of the engine, and target air inlet pressure is calibrated based on the negative torque control pulse spectrum; performing air flow calculation according to the target air inlet pressure to obtain an air inlet flow demand; and the air inlet flow demand is converted into throttle valve flow, and a throttle valve opening degree target is obtained through calculation according to the throttle valve flow. The invention further discloses an engine stepless continuous in-cylinder braking system based on dynamic closed-loop control. The problems that in-cylinder braking modes in the prior art are correspondingly lagged, complex long downhill cannot be met, and energy loss is too large are solved.

The utility model provides an ozone aeration system with a backwashing function. The ozone aeration system comprises an ozone aerator; a controller; the air outlet end of the ozone aeration pipe is communicated with the ozone aerator; the air flow meter is arranged on the ozone aeration pipe, is used for monitoring the air inlet flow of the ozone aeration pipe and is electrically connected with the controller; the pressure sensor is arranged on the ozone aeration pipe, is used for monitoring the air inlet pressure of the ozone aeration pipe and is electrically connected with the controller; the flushing device is communicated with the ozone aerator, is used for flushing the ozone aerator and is electrically connected with the controller; when the monitoring value of the air flow meter is smaller than the set flow value and the monitoring value of the pressure sensor is larger than the set pressure value, the controller controls the flushing device to be opened. The ozone aerator can be automatically flushed, the ozone aerator can be prevented from being blocked, and it is guaranteed that the ozone aerator can operate efficiently.

The invention discloses an automatic product quality control system and method for a combined type dry separation system in the technical field of coal separation, and the system comprises a first-section separation bed, a middle-section separation bed and a tail-section separation bed which are arranged in parallel, the middle gaps of the adjacent separation beds are connected through rubber sheets, and a vibration motor is mounted at a bed surface back plate of each separation bed; a discharging plate with the angle controlled through a servo motor is installed at the discharging end, each section of sorting bed supplies air through an air supply pipeline connected with a frequency conversion air blower, an air flow meter and an automatic air valve are installed on each air supply pipeline, and the first section of sorting bed and the tail section of sorting bed are connected with automatic suspension devices. According to the invention, the quality of the separated raw coal and the coal quality of the clean coal product and the gangue product are monitored on line, so that the separation process of the combined type dry separation system in the production process is regulated on line according to the quality of the raw coal and the product, and the adaptability and the intelligent level of the combined type dry separation machine to the change of the coal quality are improved.

The invention discloses a research and development verification device for large-flow exhaust emission control, which comprises the following components: ventilation equipment, an air flow meter, heating equipment, a pressure sensor, a temperature sensor, an electric control PLC (Programmable Logic Controller) and a urea injection device, the ventilation equipment is connected with the heating equipment through an air inlet pipe I; an air flow meter is arranged at the middle section of the air inlet pipe I; a temperature sensor and a pressure sensor are arranged in the middle section of the air outlet pipe, and the tail section of the air outlet pipe is connected with a urea spraying device; and the ventilation equipment, the air flow meter, the heating equipment, the pressure sensor, the temperature sensor and the urea spraying device are respectively connected with the electric control PLC. Ventilation of the ventilation equipment is used for replacing exhaust gas of an internal combustion engine, an engine pedestal is not needed, fuel oil is not combusted, exhaust gas is not discharged, the environment is not polluted, the cost is greatly saved, all the components are connected into the electric control PLC, different working conditions can be monitored, adjusted and simulated in real time, the operation efficiency is improved, and time, steps and sites are saved.

Provided is a deterioration degree estimation system capable of estimating the degree of deterioration of a three-way catalyst while suppressing the amount of NOx emission. A deterioration degree estimation system is provided with: an air flow meter that detects the amount of intake air of an engine; a three-way catalyst disposed in an exhaust passage of the engine and capable of absorbing oxygen; an air-fuel ratio sensor disposed in the exhaust passage upstream of the three-way catalyst; a NOx sensor disposed in the exhaust passage downstream of the three-way catalyst and capable of detecting the amount of ammonia in the exhaust gas; and an estimation device that estimates the degree of degradation of the three-way catalyst, the estimation device comprising: an acquisition unit that acquires a detected rich air-fuel ratio, which is the detected air-fuel ratio, in a state in which the detected air-fuel ratio by the air-fuel ratio sensor indicates a rich air-fuel ratio, a detected intake air amount detected by the air flow meter, and a detected ammonia amount detected by the NOx sensor; and an estimation unit that estimates the degree of deterioration on the basis of the detected rich air-fuel ratio, the detected intake air amount, and the detected ammonia amount, and estimates the degree of deterioration as the detected ammonia amount is smaller than the detected rich air-fuel ratio and the detected intake air amount.

The utility model relates to the technical field of fuel cells, discloses a sensor mounting seat tube for a fuel cell air path system, and aims to solve the problems of inaccurate measurement, high maintenance cost and large flow resistance caused by airflow turbulence in the prior art. The installation seat tube comprises a tube body, and two ends of the tube body are connected in series with an external air path, an integrated rectification structure, a fixed support seat, an air flow meter installation interface and a differential pressure sensor installation interface. The rectifying structure adopts a perforated plate or a flow guide grid and is in smooth transition with the inner wall of the pipe body to reduce vortexes. The sensing interfaces and the fixing support seats are evenly distributed in the circumferential direction of the pipe body, and redundant configuration, multi-brand adaptation or idle plugging are supported. According to the utility model, the airflow stability is optimized through the rectification structure, low flow resistance and system reliability are considered, and the requirement of large flow is met; the connector of the air flow meter is fixed through screws, sealing performance is good, and quick disassembly and assembly are supported; the differential pressure sensor interface bolt and the cover plate are fixed, so that quick disassembly and assembly are realized, looseness is prevented, and the maintenance efficiency is improved.

A turbocharger selection device comprises a test bench and an engine arranged on the test bench, a turbocharger to be matched is connected with the engine, an air intake of the engine is provided with an air flow meter, an exhaust port of the engine is provided with a smoke meter, and a pressure regulating mechanism for regulating opening pressure of a turbocharger exhaust valve is further arranged on the test bench. A selection method thereof comprises the following steps. 1. Selecting multiple turbochargers to be matched with different turbo end flow capacities, connecting the turbochargers to the engine to test air-fuel ratio and smoke of the engine under idling load conditions, both satisfying preset targets, and entering the next step. 2. Defining rail pressure and timing emission parameters based on a specific NOx boundary of the engine, testing air-fuel ratio under a calibration condition, exhaust temperature under a maximum torque condition and low-speed torque of the engine, adjusting the opening pressure of the exhaust valve to the parameters to satisfy boundary requirements by using the pressure regulating mechanism, and entering the next step. 3. Selecting a turbocharger with a large turbo end flow capacity to complete selection.

To determine the filter's lifespan with greater accuracy. [Solution] The fuel cell system 20 includes an air flow meter 31, a pressure sensor 32, a pressure regulating valve 30, and a control unit 34. The control unit 34 calculates the differential pressure ΔPcp between the discharge pressure and suction pressure of the air compressor 22 based on the rotational speed of the air compressor 22 when the air flow rate detected by the air flow meter 31 is the target flow rate, and calculates the pressure loss ΔPac due to the filter 29 based on the differential pressure ΔPcp. Taking the value of the pressure loss ΔPac at a predetermined time as a reference value, the control unit 34 determines whether the value obtained by subtracting the reference value from the value of the pressure loss ΔPac calculated in a later period after the predetermined time exceeds a predetermined threshold.

The application discloses an oil pump inflation test device, which comprises a gas pipe connected with an air inlet end of a bubble generator, a trumpet end of a trumpet oil pipe covering an air outlet end of the bubble generator, the bubble generator, the trumpet oil pipe and an oil pump inlet pipe being placed in an oil tank, one end of the oil pump inlet pipe being connected with the other end of the trumpet oil pipe, the trumpet end of the trumpet oil pipe being connected with the oil tank, and the other end of the oil pump inlet pipe being connected with a pipeline of an oil inlet of the oil pump; an electric control adjusting valve is installed on the gas pipe; and an air flow meter is installed on the gas pipe. The technical content disclosed by the application can quantitatively control the air content of oil liquid sucked by the oil pump, simulate the actual working environment of the oil pump to test the oil pump, and improve the reliability of test development.

The utility model discloses a research and development verification device for large-flow exhaust emission control, which comprises the following components: ventilation equipment, an air flow meter, heating equipment, a pressure sensor, a temperature sensor, an electric control PLC (Programmable Logic Controller) and a urea injection device, the ventilation equipment is connected with the heating equipment through an air inlet pipe I; an air flow meter is arranged at the middle section of the air inlet pipe I; a temperature sensor and a pressure sensor are arranged in the middle section of the air outlet pipe, and the tail section of the air outlet pipe is connected with a urea spraying device; and the ventilation equipment, the air flow meter, the heating equipment, the pressure sensor, the temperature sensor and the urea spraying device are respectively connected with the electric control PLC. Ventilation of the ventilation equipment is used for replacing exhaust gas of an internal combustion engine, an engine pedestal is not needed, fuel oil is not combusted, exhaust gas is not discharged, the environment is not polluted, the cost is greatly saved, all the components are connected into the electric control PLC, different working conditions can be monitored, adjusted and simulated in real time, the operation efficiency is improved, and time, steps and sites are saved.

The utility model relates to the technical field of integrated air flow meters, in particular to a vehicle integrated air flow meter sensor which comprises an integrated air flow meter mechanism, the integrated air flow meter mechanism comprises a filtering sleeve, the filtering sleeve is arranged on the outer wall of the integrated air flow meter mechanism in a sleeved mode, and an installation base is installed on the outer wall of the integrated air flow meter mechanism. An air flow meter assembly is arranged in the mounting seat, mounting holes are formed in the side wall of one end of the mounting seat, a bolt body is mounted in the air flow meter assembly, and an inner screw is mounted on the outer wall of the integrated air flow meter mechanism. According to the filter screen, firstly, the outer screw is in threaded connection with the inner screw, and the mounting sleeve is matched with the integrated air flow meter mechanism, so that an operator can conveniently mount, dismount and clean the filter sleeve and the integrated air flow meter mechanism, and the filter screen main body is prevented from being blocked by dust.

As a control device for an internal combustion engine, an in-cylinder airflow calculation unit is provided, which calculates the amount of air entering a combustion engine cylinder based on an airflow sensor. Here, the control device for the internal combustion engine includes a calculation unit that calculates an intermediate parameter, which specifies an intake efficiency, for calculating the in-cylinder airflow quantity based on an intake manifold pressure. The intermediate parameter is corrected based on one or both an estimated value and a measured value of a physical quantity that changes with a change in the combustion chamber wall surface temperature in the combustion engine cylinder.

The present application relates to a control method of an internal combustion engine and a control device of an internal combustion engine, in which an intake air amount (A1) directly measured by an air flow meter (19) is selected as an air amount that becomes a basis of an air-fuel ratio control at normal times, and in a state in which an opening area (St) of a throttle valve (14) is smaller than an opening area (Sn) of a negative pressure generation valve (18), an intake air amount (A2) that is not dependent on the air flow meter (19), for example, an intake air amount that is estimated and calculated based on a throttle opening degree, is selected as an air amount that becomes a basis of an air-fuel ratio control at a prescribed transition state. Thus, a response delay of detection of the intake air amount can be suppressed, an intake air amount (A) corresponding to a requested engine torque (T) of the internal combustion engine (1) can be supplied, and an improvement in precision of the air-fuel ratio control can be achieved.

The utility model relates to the field of semiconductor testing, in particular to a wafer testing auxiliary device, which comprises a frame body, a wafer testing auxiliary device and a wafer testing auxiliary device, the rotating mechanism comprises an adsorption part used for adsorbing the dummy wafer, and the rotating mechanism drives the dummy wafer and the wafer on the placing platform to rotate; wherein an arc-shaped shaping wall is formed on one side of the placing platform, when the dummy wafer and the wafer are placed on the placing platform, part of the side edges of the dummy wafer and the wafer abut against the shaping wall, part of the side edges which do not abut against the shaping wall protrude out of the placing platform, and the projection of the side edges abutting against the shaping wall and the projection of the side edges protruding out of the placing platform are at least partially overlapped. The wafer test auxiliary device not only can effectively solve the problem of insufficient vacuum adsorption force of an air flow meter wafer caused by a microfluidic network structure, but also can avoid additional damage to the wafer, and meanwhile, improves the test efficiency and accuracy.

The invention discloses an air flow meter integrated with an active adjusting function and an air inlet flow adjusting and controlling method, and relates to the technical field of automobile engine air inlet control. The air flow meter comprises a shell, and a flow sensor, a flow adjusting mechanism, a controller and an air heating device are arranged in the shell; the flow sensor and the flow adjusting mechanism are electrically connected with the controller, the controller is in communication connection with an engine control unit (ECU) of a vehicle, and the flow adjusting mechanism is used for changing the sectional area of a flow channel or the gas direction under the control of the controller. According to the method, the air flow passing through the flow meter can be directly, rapidly and accurately adjusted at the air flow meter according to the real-time combustion requirement of the engine in combination with historical empirical values, so that the combustion process is optimized, the engine efficiency and dynamic responsiveness are improved, and emission is reduced.