Is a temperature sensor input?
A temperature sensor is an electronic device that measures the temperature of its environment and converts the input data into electronic data to record, monitor, or signal temperature changes. There are many different types of temperature sensors. Non-contact temperature sensors are usually infrared (IR) sensors.
What does the coolant temperature sending unit do?
A coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor) is used to measure the temperature of the coolant/antifreeze mix in the cooling system, giving an indication of how much heat the engine is giving off.
How does a car temperature sending unit work?
The sending unit is a temperature-sensitive material that is part of a variable resistance, water-sealed unit that sits in the coolant stream in the engine. As the engine warms up the resistance in the sending unit is lowered gradually until the system reaches maximum heat.
What is the input detected by coolant temperature sensor?
The coolant sensor detects the change in temperature and signals the Powertrain Control Module (PCM) so it can tell if the engine is cold, warming up, at normal operating temperature or overheating.
How is the coolant temperature sensor used by the ECU?
The resistance of the sensor varies with temperature, this is how the ECU can monitor temperature changes. The ECU uses this reading to calculate the coolant temperature, and from there adjusts the fuel injection, fuel mix, and ignition timing, and controls when the electric cooling fan is switched on and off.
How does the ECU work in a car?
The ECU uses this reading to calculate the coolant temperature, and from there adjusts the fuel injection, fuel mix, and ignition timing, and controls when the electric cooling fan is switched on and off. This information is also used to send an accurate reading of the engine temperature to a gauge on the dashboard.
How is the temperature gauge attached to the dashboard?
Later, the temperature gauge moved onto the dashboard to make it easier to see. The vapor-pressure type sending unit attached to the gauge via a long copper capillary that attaches to a C-shaped copper tube in the gauge.
How does a temperature sending unit work in an engine?
Gauge sending units work a little differently. A heat conductor disc is attached to an electrically conductive spring that allows more voltage through the circuit as the engine temperature increases.