Vehicle exterior temperature obtaining system and method

Abstract

The invention provides a vehicle exterior temperature obtaining system and method. The vehicle exterior temperature obtaining system comprises a vehicle exterior temperature sensor, an engine cooling water temperature detector and a storing memory module, wherein the vehicle exterior temperature sensor, the engine cooling water temperature detector and the storing memory module are connected with a logical processing unit; and the logical processing unit and the storing memory module are arranged in an automatic air condition controller. The vehicle exterior temperature obtaining system and the method provided by the invention are executed. The method comprises the following steps of according to the logical comparison operation of the temperature value of cooling water, the value of the vehicle exterior temperature sensor and the memory value of the storing memory module, judging the cold starting condition and the hot starting condition of a vehicle when the vehicle is started, and obtaining the accurate vehicle exterior temperature. According to the vehicle exterior temperature obtaining system and the method disclosed by the invention, under a low-power dissipation situation that the automatic air conditioner controller cuts off own power supply, after reigniting is performed again for operating the vehicle, the cold-vehicle condition and the hot-vehicle condition of the vehicle can be accurately judged, the vehicle exterior temperature sensor can also be free from the influence of a radiator and a hot water tank, and an initial value of the vehicle exterior temperature which is close to the actual environmental temperature is obtained.

Description

technical field [0001] The invention relates to the technical field of hot and cold starting of automobiles, in particular to a system and method for obtaining the temperature outside the vehicle. Background technique [0002] The function realization of conventional automotive automatic air-conditioning controller needs the support of the following input signals: interior temperature, exterior temperature, evaporator temperature, vehicle speed, etc. Since the outside temperature sensor is installed at the front air intake grille of the vehicle, it is easily affected by the heat radiation of the radiator and air conditioner condenser during driving (especially when the vehicle speed is low), resulting in the outside temperature value detected by the outside temperature sensor Not the actual ambient temperature. Moreover, as the static power consumption requirements of the electronic control unit of the car are getting lower and lower, the automatic air-conditioning controll...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a system and method for obtaining the temperature outside the vehicle, which solves the problem of judging the cold and hot start state of the vehicle when the current vehicle is started and acquiring Technical issues with accurate outside temperature

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