Passat Lingyu Air Flow Meter | Monitoring Quotation for Small and Medium sized Tunnel Vehicles

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1. Passat Lingyu air flow meter malfunction

1. Introduction to air flow meter The function of air flow meter The air flow meter measures the amount of fresh air entering the engine intake manifold and the intake temperature, and the ECU adjusts the fuel injection amount, smoke limit, and EGR opening control based on this information.

2. Installation position The sensor is installed on the intake pipe of the bending pin engine, at the rear end of the air filter. 3. Working principle 3.1. Principle of air flow meter The air flow sensor integrates some electronic components on a ceramic substrate. When the engine is working normally, it first heats the diaphragm, and when fresh air flows through the sensor, it will take away some heat. At this time, the ECU will control the Wheatstone bridge on the diaphragm to adjust the diaphragm. Supplementing heat will cause changes in the electrical signal, which when transmitted to the ECU, The ECU will calculate the intake air volume based on this change. 3.2. The principle of the air temperature sensor is that the intake air temperature sensor is a resistor with a negative temperature coefficient. When the intake air temperature changes, the resistance of the resistor will change, causing a change in the signal voltage at the ECU end. Based on this change, the ECU calculates the intake air temperature. 3.3. Determination of airflow direction There are two temperature resistors at each end of the hot film of the air flow meter. When the airflow passes through the hot film, it will take away some heat, so the temperature at the front end of the hot film is relatively lower than that at the back end. The ECU determines the direction of the airflow based on this

2. Detection of air flow meter: Fault codes related to air flow meter

2. Monitoring quotation for small and medium-sized channel vehicles

3. Where is the Passat Lingyu 1.8T air flow meter located

The Passat Lingyu 1.8T air flow meter is installed inside the air filter housing, at the connection between the rear end of the air filter and the intake hose.

1. Core position situation: 1) The air flow meter is directly located inside the air filter housing, downstream of the air filter element, adjacent to the engine intake hose connection. 2) The sensor is connected in series in the intake system, with the front end tightly held by the air filter and the rear end connected to the engine intake manifold through an intake hose to measure the air flow entering the engine.

2. Other related explanations: 1) The position of the air flow meter for the 1.8T model of the old Lingyu is the same as that of the Passat B.

5. Some Volkswagen models such as the Bora have a built-in design. 2) The air flow meter is the core sensor of the electronic fuel injection engine, which transmits air intake data to t

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