Thermostat, thermostat control method and engine cooling system

Abstract

The invention discloses a thermostat, a thermostat control method and an engine cooling system. The thermostat comprises two outer supports and a temperature sensing sensor set, a shell is arranged at the bottoms of the opposite sides of the two outer supports, an outer shell is arranged in a cavity formed by the shell and the outer supports, a temperature sensing medium is arranged in an inner cavity of the outer shell, a push rod is arranged in an inner cavity of the temperature sensing medium, the bottom of the push rod penetrates through the inner cavity of the outer shell and extends to the outside of the shell, and the bottom of the push rod is fixedly connected with electric control equipment. According to the thermostat control method, the water temperature of an engine can be stably controlled, the actual water temperature fluctuation is small, the stable state is basically achieved, the actual water temperature and the target water temperature are kept roughly consistent, meanwhile, in the fault detection process, fault misjudgment is effectively avoided, the fault analysis and diagnosis rate is increased, and then the normal operation of a vehicle is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of thermostats, in particular to a thermostat, a thermostat control method and an engine cooling system. Background technique [0002] The thermostat is a valve that controls the flow path of the engine coolant, and is mostly installed in the engine outlet pipe. According to the different flow ranges of the coolant, the flow path of the coolant can be divided into a large circulation path and a small circulation path, including the radiator The circulation path is called the large circulation path, which is suitable for the working conditions with high coolant temperature; the circulation path that does not include the radiator, but includes the oil cooler or the heater core is called the small circulation path, and is suitable for the coolant temperature For lower working conditions, the electronic thermostat in the prior art is encapsulated with refined paraffin wax, which uses the characteristics of the v...

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Problems solved by technology

[0003] The object of the present invention is to provide a thermostat, a thermostat control method and an engine cooling system, which have the advantages of improving the fault detection effect and solve the problem of calculating the model water temperature by using various operating parameters of the engine. When the model water temperature reaches warm When the engine temperature is lower than the warm-up temperature, if the engine water temperature is lower than a certain threshold value of the warm-up temperature, it is determined that the thermostat is faulty, but there are certain errors in this control method, which leads to the problem of increased risk of misjudgment

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