Method and device for detecting water temperature of automobile

Abstract

The invention discloses an automobile cooling fluid temperature detection method which comprises the following steps: judging whether an automobile engine is started according to an engine speed; if the automobile engine is not started, taking the current temperature outside an automobile as temperature of automobile cooling fluid; if the automobile engine is started, detecting a starting mode of the automobile; if the current starting mode of the automobile is cold starting, calculating the start time from ignition of the engine, calculating an average engine speed, and calculating the temperature of the automobile cooling fluid according to the average engine speed and the current temperature outside the automobile; and if the current starting mode of the automobile is hot starting, detecting flame-out time of the engine, and calculating the temperature of the automobile cooling fluid according to the flame-out time and the current temperature outside the automobile. The invention further provides an automobile cooling fluid temperature detection device. By the implementation of the technical scheme provided by the invention, the current temperature of the cooling fluid of the automobile can be calculated through intelligent simulation so as to realize functional control over other vehicle-mounted devices; and complicated automobile modification is avoided, and the cost and the development time are reduced.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to an automobile water temperature detection method and a device thereof. Background technique [0002] The water temperature of a car engine is related to many factors, such as engine speed, engine displacement, number of cylinders, cooling fan control, vehicle speed, fuel conversion rate, initial temperature and outside temperature, etc. At the same time, the water temperature of the car engine also restricts the performance of other on-board devices. For example, the implementation of a conventional automotive climate control controller typically requires the following input signals: interior temperature, exterior temperature, evaporator temperature, heating core (cooling water) temperature, sunlight intensity, vehicle speed, and engine RPM. [0003] For the development of a model, there are usually diversified designs such as high configuration and low configuration,...

AI Technical Summary

Problems solved by technology

However, adding the heating core (cooling water) sensor will greatly increase the vehicle upgrade cost and development time, and when adding sensors to the car, it is often necessary to modify the design of the wiring harness and air conditioning box, etc. The operation is complicated and requires professional maintenance personnel, and time consuming

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