what is b and t on a water temp gauge

• 2022-07-20

The vehicle temperature control switch uses high-quality disc-shaped bimetal as the temperature sampling element. The water temperature switch installed at the temperature sensitive part of the water tank dynamically collects the changes of water temperature. Applying the principle of "instantaneous jump" and combined with mechanical action, the two contacts can quickly contact, start the fan and cool the water in the water tank, which plays a role of safety protection for the automobile engine.

The function of the water temperature switch is that when the cooling water of the car is insufficient and the temperature is too high, the automatic thermostat will automatically stop heating, so as to prevent the car from spontaneous combustion caused by too high engine temperature, and also prevent the engine from shutting down automatically when the water tank temperature is too low. The water temperature switch is composed of a temperature sensor, which converts the temperature signal that changes when the water temperature changes into an electrical signal and transmits it to the electronic components of the thermostat in time through the resistance change of the controller. When the engine temperature rises, the thermostat sends a signal to reduce the cooling water temperature controlled by the engine control unit and increase the heating water temperature controlled by the engine control unit.

T on the thermostat indicates the control cycle. P indicates that the scale has a set value. P. Proportional band set value. The higher the p value is, the lower the sensitivity of the output of the master relay of the thermostat is. The smaller the p value is, the higher the sensitivity of the output of the master relay of the thermostat is. T. Control cycle. When the temperature rise and fall rate of the system is relatively fast, t should be reduced. Generally speaking, the smaller t is, the better the system temperature control is, but too small T will affect the service life of the relay.

The water temperature switch can be installed on the vehicle water temp gauge or in the compartment. After the temperature control switch is installed on the vehicle, it can effectively prevent the spontaneous combustion of the vehicle engine caused by insufficient engine cooling water. The temperature control switch is generally composed of two resistors and two contacts. One is the temperature controller control unit, and the other is the water tank temperature controller. The heating water temperature controlled by the engine temperature controller control unit can be adjusted higher and the cooling water temperature controlled by the engine control unit can be adjusted lower.