The air flow sensor is inhaled air into electrical signal sent to the electronic control unit (ECU), as the basic signal decision of injection. The engine is inhaled air flow measurement of the sensor. The electronic control gasoline engine for various operation in injection can be obtained under the condition of the optimal concentration, must accurately determined mixture every moment the amount of air inhaled engine ECU, as calculated (control) injection quantity of main basis. If the air flow sensor or lines malfunction, ECU can correct amount of signal, cannot normally injection quantity on the control, will cause the mixture too thick or thin, make the engine is running normally. Petrol injection system of electronic control air flow sensor, a variety of types of common air flow sensor according to its structure can be divided into blades (wing) type, quantity, hotline, core, thermal membrane etc. Several Carmen vortex

The traditional wave xu L petrol injection system and some intermediate model using the vane air flow sensor, such as Toyota CAMRY (pleasant) cars, Toyota PREVIA (big), Mazda MPV overlord passenger MPV etc. Its structure is shown in figure 1, chain sprocketby air flow and potentiometer two parts. The air flow in intake channel with a round of rotor shaft can swing (measure), as figure2shows, role in the shaft coil springs can make the measurement piece close intake pathways. When the engine intake air flow through the air, promote measuring deflection, make its open chips. The size of the opening Angle measuring slices of measurement depends on air flow measurement of axial thrust and chips elasticity of the rollup spring balance. The size of the amount of the throttle to change. The large amount of measurement, the air of the thrust, measurement of the opening Angle. In the measurement on the shaft connecting a piece potentiometer, as shown in figure 3 below. The sliding arm potentiometer measuring and slice the rotation, synchronous coaxial slice open Angle measuring the amount of changes (namely) convert electrical resistance changes. Through a wire connectors, potentiometer connected with the ECU. ECU according to the change of potentiometers resistance or acting on it, and the variation of the voltage measurement of gas into the engine, as shown in figure 4. roll forming machine forming machine

In the air flow sensor vane, usually within a petrol pump, electric switch, as shown in overhead conveyorfigure 5. When the engine conveyor partsstarting operation, measuring deflection, the piece, electric switch contacts closed the gasoline pump electricity, After the engine flameout, turning to measure in the closed position, conveyor chain make electric gasoline pumps switch. Now, even the ignition switch in the open position, electric gasoline pumps will not work.

Flow sensor and a the inlet temperature sensor to measure the inlet temperature, temperature compensation amount to make.

Vane air flow sensor wire connectors generally have seven terminals, as shown in figure 5, 6 and 36 in 39, nine, eight, 7, 27. But also have a potentiometer internal power gasoline pump control switch to cancel after five terminal. Figure 6 shows a Toyota and nissan vehicle vane air flow sensor wire connector contacts Replica Handbags"biomarkers". The terminal "marked" general mark in the connector on the sleeve.