Motor temperature sensors, also known as sensors, are used to measure in many places in the car, and as a rule, they are either thermoresistors (thermal sensitive resistor), thermocouple, resistive sensors (RTD) or infrared devices. Thermocouple, as a rule, uses measurements of higher indicator (for example, the temperature of the exhaust gases), and infrared sensors are used, in places where direct contact with the object is undesirable.
Thermocouple operates on the principle of changes in the physical condition of the bimetallic plate from two heterogeneous metals connected together when temperature changes. Thermocouple can be used when a very short response time is required.
RDTs are based on some metals (usually platinum, nickel or copper) thermo-respiratory behavior is measured to detect temperature changes. RDT respond to changes very linearly and can reach high accuracy.
Thermistors are made of semiconductor material, the resistance of which changes depending on the temperature. Thermistors have two options: a positive temperature coefficient (PTC) and a negative coefficient (NTC). These types relate to changing resistance in relation to an increase in temperature. For example, the resistance of the PTC type packaging will increase with an increase in temperature. NTC Type will behave in the opposite way. Thermistors, as a rule, have lower limits than thermocouple or RDT, but they are less susceptible to signal interference.
Engine temperature sensor.
This sensor is installed in the circuit circuit circuit. The engine control unit uses its signal to determine the engine temperature. The measurement range of this type of sensor, usually from -40 degrees to +130 degrees Celsius.
Air temperature sensor.
This sensor is installed in the intake manifold and is used to measure the temperature of the absorbed air. The engine control module uses the temperature and pressure of the air to calculate the mass of the absorbed air. The measurement range of this type of sensor is usually from -40 degrees Celsius to +120 degrees Celsius.
Engine temperature sensor.
This sensor is used to calculate the oil temperature in the engine. The range of measurement of the oil temperature sensor in the engine is usually from -40 degrees to +170 degrees Celsius.
Exhaust gas temperature sensor.
The exhaust gas sensor, as a rule, uses a platinum measuring resistor. The information received from this sensor is used to regulate the exhaust gas recirculation system in the engine. This sensor is installed in the system of producing engine gas gas. The measurement range is usually from -40 degrees to +1000 degrees Celsius.
Fuel temperature sensor.
This sensor is located along the fuel supply system, and provides feedback from the IKM regarding the state of the fuel system. The range of these sensors is from -40 to 160 degrees Celsius.
Gearbox fluid temperature sensor.
This sensor is located on the body of the automatic gearbox valves block and is used to measure the flow of the transmission medium. The measurement range of this sensor is approximately -40 degrees up to 210 degrees.
Tire sensor and brake discs.
These sensor, as a rule, are located in the area around the tire shell, where the sensor can “see” the radiation emitted by either the tire or in the brake disc. Since direct contact with these elements is not desirable, infrared sensors are usually used (see McLaren Electronic Systems give more detailed information).
Additional temperature sensors.
Some auxiliary systems (for example, seats heaters) that can be installed on some vehicles will also have an appropriate sensor to accompany them. These sensors provide feedback necessary for managing these systems.
The sensor of external temperature.
This sensor allows a person inside the vehicle, know the temperature outside the vehicle. He is often in the field of the front bumper.
Cabin temperature sensor (salon).
A surrounding air temperature sensor inside the cabin, usually located in the area or inside the steering column. It measures the temperature in the car interior, which will signal the HVAC system to increase or decrease the temperature in order to match the required temperature range, is turned on with the climate control system.