Water temperature plugs, of course.
1. When the water temperature sensor fails, the temperature signal is often displayed when the cold car is started or when the hot car is started, and the ECU can not provide the signal of too strong mixture, and can only supply the thinner mixture of the engine (the signal of the hot car), so the engine cold car is not easy to start. In this case, you need to check whether the water temperature sensor plug contact is normal or replace the water temperature sensor. The fuel consumption increases sharply and the idle speed is unstable, similar to the failure of cylinder and fire break; Acceleration is difficult, step on the accelerator pedal to accelerate, the speed does not go up, the muffler emits black smoke and makes a \"tuk\" sound.
2, the water temperature sensor is actually a temperature switch, when the engine water temperature exceeds 90 degrees Celsius, the water temperature sensor will be connected to the fan circuit. If the circulation is normal, and the temperature rises, the fan does not turn, the water temperature sensor and the fan themselves need to be checked when the water in the tank is in large circulation, when the water temperature exceeds 90 degrees, then the temperature control switch begins to work, drive the fan to work, reduce the temperature of the cooling system, so that the water temperature reaches normal, the temperature control switch is closed. This is the working situation and function of the temperature control switch.
The engine water temperature sensor is not in the form of a switch, it is a negative temperature coefficient resistor inside, and the resistance value gradually decreases as the temperature increases, and vice versa. The water temperature meter is essentially an ammeter, and the current will change with different resistance values, and the indication of the watch hand will also change.
1. Most of the sensors on the cylinder are magnetic switches. When the cylinder runs to the position of extending and retracting to the original position, the indicator of the induction switch is lit. The magnetic switch is composed of a magnetic reed tube. When the cylinder runs to the two ends, the magnetic ring inside is close to make the magnetic reed tube close.
2, there is a hall switch composed of Hall components, Hall switch is a semiconductor Hall components induced by the magnetic field to generate signals, amplified by the circuit output on and off signals.
3, the induction switch can sense the position of the cylinder, can directly control the relay circuit work, or send to the controller to automatically control the action of the equipment.
4, for example: the induction switch can be directly added to the input end of the control of the meter control TPC4-4TD, through the function setting to directly control the on and off of the output solenoid valve, so as to achieve the automatic work of the control cylinder.