2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42
The coolant temperature sensor is a mechanism that is designed to make a DC voltage from the temperature of this fluid. Thanks to its information, it is possible to carry out a correction of the main parameters that control the engine, depending on what its thermal state is.
The coolant temperature sensor is a unit powered by operating current, which comes from a stabilized source of the control unit. Its output voltage can be adjusted. It depends on the ambient temperature. This is how the temperature sensor works. If it increases, then the output voltage of the sensor also increases.
It is worth telling how the coolant temperature sensor is designed. It consists of a metal body, which has a cylindrical cap. Inside it is a sensitive element. Also included is a plastic tail piece with a two-prong plug.
How is such a thing as a coolant sensor mounted and installed? This mechanism is installed on the engine, as a rule, on the body of the block thermostatengine cylinders. And the air temperature sensor is placed on the receiver of the engine intake pipe. This mechanism is screwed into the threaded mounting hole, after which, with the help of a sealant, the connection is sealed. The sensor is connected to the wiring harness using a two-pin socket with a latch. I would like to note that these mechanisms are polar according to the switching scheme, that is, the state of breakage is equivalent to turning the sensor back on.
There are several types of this mechanism. The most common type is the coolant sensor - thermistor. The resistance of such a mechanism changes if the temperature of the liquid also changes. Most often, these are thermistors with a negative temperature coefficient. In them, the resistance decreases with increasing temperature and, conversely, becomes greater if the engine is cold. When it warms up, the resistance drops, when its temperature reaches a minimum, work begins.
Not every coolant temperature sensor has one function. Sometimes mechanisms with a double function are used. That is, when the temperature reaches a certain level, the electronic control unit changes the voltage value so that the readings acquire a higher resolution.
On older models of machines, other units are also used. Basically they have a switch with two positions. These sensors can open or close only at a specific temperature. In addition, they are directly connected to a relay so that the cooling fan can be switched off and on. Or he sends a signal to the dashboard, and after that the lamp starts to light, indicating that the signal has been received. Such sensors (which are single-wire) send a signal to the measuring device, which is located on the instrument panel.
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