Blade type air flow meter | 4. Blade type air flow sensor, does it measure air pressure or flow rate?

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What are the advantages and disadvantages of car air flow meters?

1、 Blade type air flow meter: Advantages: Simple principle. Disadvantage: It obstructs the intake air. The signal changes slowly.

2、 Measuring core type: Advantages: None. Disadvantages: There is intake resistance and inaccurate signals. The above two have been eliminated.

3、 Carmen eddy current type: Advantages: It can directly generate digital signals that can be received by a computer. The signal is accurate. Disadvantages: Complicated or pure structure, high manufacturing cost.

4、 Hotline type: Advantages: Low cost and accurate signal. Fast response speed. Disadvantage: It can only generate analog signals, and the computer needs to convert the received signals.

2. What are the advantages and disadvantages of car air flow meters? The blade type air flow meter adopts a simple principle, but its significant disadvantage is that it obstructs the intake and the signal change speed is slow, which has made it gradually phased out in contemporary cars. The chip type air flow meter also has its shortcomings. Although it does not have obvious advantages, it still has intake resistance, which leads to inaccurate signals and has prompted its elimination. In contrast, the Karman vortex air flow meter can directly generate digital signals for computer reception, with high signal accuracy. However, its structure is cumbersome and the manufacturing cost is relatively high. Finally, there is the hot wire air flow meter, which has the advantages of low cost and accurate signal, fast response speed. However, it can only generate analog signals, and signal conversion is required when received by the computer, which also becomes one of its disadvantages. Overall, different types of air flow meters have their own advantages and disadvantages, and the selection should be based on specific needs and costs. Contemporary car manufacturers consider these factors comprehensively in their design to ensure the selection of the most suitable air flow meter core, thereby improving the efficiency and reliability of the engine. It is worth noting that with the development of technology, new types of air flow meters are constantly emerging, which may overcome some of the shortcomings of existing types and provide more possibilities for the future development of the automotive industry.

3. What are the advantages of blade type air flow meters?

1. Introduction to Air Flow Meter The function of an air flow meter is to measure the amount of fresh air entering the engine intake manifold and the intake temperature. Based on this information, the ECU corrects the fuel injection amount, limits smoke, and controls the EGR opening.

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. The principle of an 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, 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

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