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1. Explanation of the principle of automobile intake flow meter
The principle of automobile intake flow meter is to accurately measure the intake volume of the engine through different measurement methods and sensors.
1. Indirect Measurement Method In the "D" type fuel injection control system, the car intake flow meter adopts the indirect measurement method.
. This method detects the air pressure inside the intake manifold through a pressure sensor, and indirectly calculates the amount of intake air drawn into the engine cylinder. Although this method has relatively low measurement accuracy, it has been widely used in some economical vehicles due to its low cost.Secondly, the direct measurement method is used. In the "L" type fuel injection control system, the intake flow meter of the car adopts the direct measurement method.
. This method directly measures the amount of air drawn into the engine cylinder through an air flow sensor. The commonly used air flow sensors include wing type, Karman vortex type, hot wire type, and hot film type. These sensors can measure the intake air volume with high precision, providing more accurate data support for the ECU.III. Working principle of wing type air flow meter Taking the example of a numerical wing type air flow meter, its working principle is that when air passes through the channel of the sensor, the blades will be rotated by the pressure of the airflow and the elastic force of the return spring.
. The sliding arm of the wing and potentiometer rotate coaxially, so the angle change of the wing opening will be converted into a change in resistance value. The ECU can determine the intake volume of the engine by measuring the change in
2. What country is the Delta Airflow Delta Flow Meter from?
The Delta Flow Meter is a product from Germany.. The following is a detailed answer about the Delta flowmeter:
1. The nationality of the Delta flowmeter. The Delta flowmeter is produced by SYSTEC, a German company. It uses the principle of differential pressure and adopts an insertion installation method. It is a high-precision flow measuring instrument.
2. Characteristics of Delta Flow Meter Multi point Measurement: Delta Flow Meter is easy to achieve grid Fabry Perot measurement in pipelines, which is its obvious advantage compared to single point measurement instruments such as Bitoba Flow Meter.
. Strong anti blocking ability: The pressure tapping hole of the Delta flowmeter is designed with stable components and strong anti blocking ability. There are no movable parts, so the collected signal is stable. High precision: The flow coefficient of the Delta flowmeter is linear and does not vary with Reynolds number and flow velocity like orifice plates or nozzles, so its measurement accuracy is relatively high, generally up to 0.5%. Large range ratio: The range ratio of the Delta flowmeter can reach 10:1 or more, suitable for measuring different flow ranges.III. Application of Deltaba Flow Meter Deltaba flow meters are suitable for high-precision flow measurement of gases, liquids, and vapors, and are widely used in industries such as petroleum, ch
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