Application of Compressed Air Flow Meter in Automobile

Abstract: The application information of compressed air flow meter in automobiles is provided by excellent manufacturers of flow meters and flow meters. The compressed air flowmeter is a sensor used to calculate the intake air volume of the engine. In the electronically controlled fuel injection device of the automobile, the air flow sensor is one of the important components that determines the control accuracy of the system. Combine the air flow signal with the engine speed signal. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of compressed air flowmeters in automobiles. The compressed air flowmeter is a sensor used to calculate the intake air volume of the engine. In the electronically controlled fuel injection device of the automobile, the air flow sensor is one of the important components that determines the control accuracy of the system. The air flow signal and the engine speed signal are used as the reference signal for the injection time. According to the different characteristics of the air flow meter sensor, the fuel control system is divided into L-type control that directly measures the intake air amount and D-type control that indirectly measures the intake air amount according to the measurement method of the intake air amount. The original electronic fuel injection control system used not a microcomputer, but an analog circuit. At that time, a valve-type air flow sensor was used, but as the microcomputer was used to control fuel injection, several other air flow sensors also appeared. The development of the air flow meter has generally gone through the following four generations: * The generation is referred to as the L type, and a linked slip resistance is set on the throttle shaft to measure the throttle opening, and then the speed signal and the intake temperature signal are converted into intake air. quantity. At present, it is rarely used, mostly used in old models, and some models are now used for auxiliary signals. The second generation is abbreviated as D type. The vacuum is drawn from the intake manifold. The vacuum acts on the voltage induction sheet to induce the voltage value. The corresponding intake pressure is calculated in the ECU, and then the intake air is calculated with reference to the cross-sectional area of ​​the intake air. quantity. Mainly used in Audi V6 and other models. The third generation is abbreviated. The principle is that the ECU maintains a constant temperature by giving different currents. When different flows of air flow through, it will take away different heat, and the current change at this time becomes a measure of the intake air volume. The fourth generation is referred to as hot film type, and its working principle is basically the same as that of the type. It is an improved type of the type and is currently the most widely used. Air flow meter troubleshooting and repair. The ECU of the electronically controlled fuel injection system has a fault storage function, which summarizes the working conditions of each sensor and actuator, and compares it with the fixed program stored in the computer. If the error exceeds the specified range, it is stored as a fault, and maintenance personnel can pass The fault reader (detector) reads the specific fault condition. If the air flow meter or connecting line fails, the measurement of the intake air volume of the engine will be inaccurate, and the mixture will be too rich or too lean, so that the ECU cannot accurately control the fuel injection volume of the engine, resulting in difficulty in starting the engine, unstable idle speed, Faults such as poor acceleration, abnormal operation, easy flameout, rising fuel consumption and excessive emissions. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Application of Compressed Air Flow Meter in Automobile'

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Overall, mass flow meter may be a great way for manufacturers to expand their use of technology, but the price could present a significant hurdle for some businesses.