Automotive air conditioning environment temperature judging system

Abstract

The invention provides an automotive air conditioning environment temperature judging system. A three-stage environment temperature judging mode is adopted, and when the difference between the water temperature of an engine and the environment temperature collected by an environment temperature signal sensor is narrow, the temperature collected by the environment temperature signal sensor is considered to be accurate; when the difference between the water temperature of the engine and the environment temperature collected by the environment temperature signal sensor is significant, and the water temperature of the engine is higher, the collected environment temperature is considered to have a large error. According to the system, the difference between the true environment temperature value and the water temperature value of the engine in the state, switching to stall from idle speed or low speed state, of the engine is finely distinguished as an error correcting value through previousexperiments so as to correct the surrounding environment temperature value collected by the environment temperature signal sensor, so that the intelligent air conditioning control error is reduced, and the driving comfort of a passenger is improved.

Description

technical field [0001] The invention relates to the field of automobile air-conditioning control, in particular to an automobile air-conditioning ambient temperature judging system. Background technique [0002] The ambient temperature signal sensor used to obtain the ambient temperature outside the car in the car air conditioner is installed on the air intake grille in front of the engine radiator, and the distance from the surface of the engine radiator is only a dozen centimeters. After the vehicle is driven from idling or low speed for a period of time until the engine is turned off, the air flow rate at the ambient temperature signal sensor is small, and the heat emitted by the engine or radiator can easily radiate and affect the ambient temperature signal sensor, resulting in a higher temperature than the temperature collected by the ambient temperature signal sensor. The actual ambient temperature is relatively high; after a period of time after the engine is turned o...

AI Technical Summary

Problems solved by technology

After the vehicle is driven from idling or low speed for a period of time until the engine is turned off, the air flow rate at the ambient temperature signal sensor is small, and the heat emitted by the engine or radiator can easily radiate and affect the ambient temperature signal sensor, resulting in a higher temperature than the temperature collected by the ambient temperature signal sensor. The actual ambient temperature is relatively high; after a period of time after the engine is turned off, the temperature signal collected by the ambient temperature signal sensor is still affected by the heat emitted by the engine and radiator

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