What is the principle of the coolant temperature sensor?
1 Answers
The engine ECU receives the signal from the coolant temperature sensor as a correction signal for fuel injection and ignition, and also uses it to control the coolant fan, air conditioning, etc., making its role significant. If the ECU receives a distorted signal from the coolant temperature sensor, it will severely affect the normal operation of the engine, and may even cause difficulty in starting the engine. Below is additional information: 1. ECU correction timing: The coolant temperature sensor is installed in the engine block water jacket or coolant pipeline, in contact with the coolant, to detect the engine's coolant temperature. After receiving this temperature signal, the ECU adjusts the fuel injection timing and ignition timing. 2. Function: When faults such as excessive vehicle load, water shortage, incorrect ignition timing, or non-rotating fan cause the coolant temperature to rise excessively, the engine body temperature will increase, preventing the engine from operating properly. Therefore, a coolant temperature gauge is designed in the instrument system. The coolant temperature sensor detects the engine coolant temperature, allowing the driver to visually observe the coolant temperature under any operating condition and take appropriate action promptly.
