Air flow sensor for improving air inlet temperature monitoring and process thereof

Abstract

The invention discloses an air flow sensor for improving air inlet temperature monitoring and a process thereof, and the air flow sensor comprises a housing which is provided with a plug, an air measurement flow channel and a communication groove; the circuit board is arranged on the shell through the circuit board placing groove; the ventilation flow channel penetrates through the two ends of the circuit board and is communicated with the circuit board placing groove; the first temperature measuring element comprises a platinum wire resistor and a thermistor which are arranged in the air measuring flow channel; in daily use, by the adoption of the technical scheme, according to the bridge balance principle, the balance state of the bridge is not affected by the same increment of the compensation element and the platinum wire resistance caused by air temperature rise, and therefore the compensation element eliminates the influence of air temperature on the flow measurement value.

Description

technical field [0001] The present invention relates to an air flow sensor and a process for improving the monitoring of intake air temperature. Background technique [0002] Air flow sensor, also known as air flow meter, is one of the important sensors of EFI engine. It converts the air flow inhaled into an electrical signal and sends it to the electronic control unit (ECU), as one of the basic signals for determining fuel injection. To monitor the mass flow of the engine intake air; in the current state of the art, the working environment does not consider whether the ambient temperature has an influence on the monitoring data. In this way, the detected data has a large error, and the components are affected by the air duct temperature, resulting in poor stability. The main board element circuit affects the thermal film element on the air measuring element placement rack, which further causes the distortion of the detected air flow detection data; the key is that the plat...

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Problems solved by technology

It converts the inhaled air flow into an electrical signal and sends it to the electronic control unit (ECU), as one of the basic signals for determining fuel injection. At present, the air flow sensor is a key component in the electronic control system of the automobile engine. Its function is to use To monitor the intake mass flow rate of the engine; the current working environment in the prior art does not consider whether the ambient temperature has an impact on the monitoring data, so that the detected data has a large error, and the components are affected by the temperature of the air duct, resulting in poor stability. The circuit of the motherboard components affects the hot film components on the wind measuring component rack, further causing the distortion of the air flow detection data; the key is that the platinum wire resistor in the prior art is in front of the compensation component, and the temperature of the platinum wire resistor itself is high, and the gas in the Due to the thermal field area passing through the platinum wire resistance, the gas temperature rises twice, which affects the resistance value of the compensation element and increases the distortion, resulting in the unequal resistance value of the platinum wire resistance and the resistance value of the compensation element, causing the bridge to lose balance

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