Temperature control system and method

Abstract

The embodiment of the invention provides a temperature control system and method, and relates to the technical field of engines. The temperature control method comprises the steps that the current opening degree of a thermostat valve is acquired; an execution duty cycle signal is generated based on the current opening degree of the thermostat valve and the influence parameters, wherein the influence parameters comprise at least one of the water temperature of an engine, the rotating speed of the engine, the air inlet pressure of the engine, the air inlet temperature of the engine and the wholevehicle speed; the execution duty cycle signal is converted into a driving electric signal for driving a direct-current motor actuator and is sent to the direct-current motor actuator; and the direct-current motor executor controls the opening degree of the thermostat valve by utilizing the driving electric signal. The temperature control system and method have the advantages that in the temperature control process, the opening degree of the thermostat valve in the temperature control system can be accurately controlled, so that the flow of cooling liquid flowing through the thermostat valvecan be accurately controlled, and therefore the working water temperature of the engine in the large and small circulation of a cooling system can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a temperature control system and method. Background technique [0002] In view of the enhancement of people's awareness of energy conservation and environmental protection, various automobile manufacturers have conducted research on vehicle fuel-saving technologies. For example, programs such as idling start-stop function, shift reminder function, and smart generators can be used to reduce vehicle fuel consumption. [0003] After the vehicle starts normally, the engine is in a cold running state, and the temperature is too low to increase the load on the engine. Therefore, for the engine cooling system, it is often achieved by shortening the cooling or warming up time of the engine and making the engine Run at a reasonable and accurate working water temperature to achieve the purpose of reducing fuel consumption. Among them, the thermostat is the core component of the engine coo...

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Problems solved by technology

[0004] Although the above-mentioned thermostat using paraffin as the temperature sensing component can control the opening or closing of the coolant, with the development of the automobile industry, people hope to control the working water temperature of the engine more accurately. Obviously, based on the structure of the mechanical wax valve It is difficult for a thermostat to meet the demand only by virtue of the physical characteristics of paraffin wax thermal expansion and cold contraction

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