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『Santana air flow meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Santana Zhijun just replaced the air flow meter. Whats the reason for high idle speed?
1. Introduction to air flow meter. The function of air flow meter is to measure the amount of fresh air entering the engine intake manifold and the intake temperature., ECU performs fuel injection quantity correction, smoke restriction, and EGR opening control based on this information
2. Installation position: The sensor is installed on the engine intake pipe, 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 takes away some of the heat. At this time, the ECU will control the Wheatstone bridge on the diaphragm to supplement the heat of the diaphragm, which will cause changes in the electrical signal. When the signal is 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. The intake air temperature sensor is a resistor with a negative temperature coefficient. When the intake air temperature changes, the resistance value of the resistor will change, which will cause a change in the signal voltage at the ECU end. The ECU calculates the intake air temperature based on this change. 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 lower than that at the rear end. The ECU determines th
2. Detection of air flow meters: Fault codes related to air flow meters
2. How to judge the quality of car air flow meters
1. Detection of wing type air flow meters There are two types of wing type air flow meters: 5-wire and 7-wire. The 5-wire wing type air flow meter does not have an oil pump switch inside, while the 7-wire wing type air flow meter has an oil pump switch inside.
. Names and functions of each terminal.2、 The detection of hot film air flow meter: Hot film air flow meter has low manufacturing cost, long service life, and is widely used. Santana Era Superman, SGM Buick and other cars all use this type of air flow meter. Symptoms of a broken car air flow meter include shaking at idle, high fuel consumption, weak performance at high speeds, and black smoke from the exhaust pipe. Inspection and analysis: After testing with a fault diagnosis instrument, it was found that the data block of the engine air flow meter exceeded the standard severely. The reason for the damage of the air flow meter was often due to the use of inferior air