Method for obtaining ambient temperature and its control unit

Abstract

A method for obtaining ambient temperature, which includes the following steps: (a), start; (b), parameter initialization; (c), signal acquisition; (d), program state judgment; if the program is running for the first time, then Execute action 01; if the program is not running for the first time, then execute action 02; (e), assign a value; record the current engine state as the engine state in the previous cycle during the next cycle; in addition, calculate the current ambient temperature As the ambient temperature output value of the display screen; (f), return to step (c), enter the next cycle calculation; (g), get the program stop signal, record the current ambient temperature calculation value, as the next program restart , the ambient temperature calibrated when the engine was turned off last time, the program ends. The beneficial effects of the present invention are: according to different situations, the temperature reading of the ambient temperature sensor is corrected, and interference factors are eliminated, so as to obtain a more accurate actual ambient temperature. The present invention also relates to a control unit using the above method for calculation.

Description

technical field [0001] The invention relates to a method for obtaining ambient temperature and a control unit thereof, which are applied in the field of automobile air conditioners. Background technique [0002] In order to enable people in the car to know the temperature of the external environment, it is usually displayed on the car dashboard. In the prior art, a temperature sensor communicated with the external environment is usually provided at the position of the air inlet at the front end of the vehicle body. Although the reading of the temperature sensor can indeed reflect the temperature at the location of the temperature sensor, because the temperature sensor is affected by factors such as engine heat radiation and vehicle exhaust in front, its reading often cannot reflect the real temperature of the external environment where the car is located. [0003] Therefore, it is necessary to improve the existing technology to solve the above technical problems. Contents...

AI Technical Summary

Problems solved by technology

Although the readings of the temperature sensor can indeed reflect the temperature at the location of the temperature sensor, because the temperature sensor is affected by factors such as engine heat radiation and vehicle exhaust in front, its readings often cannot reflect the real temperature of the external environment where the car is located.

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