As the critical temperature monitoring component in automotive oil temperature sensor, NTC thermistor measures the junction temperature of engine lubricating oil, automatic transmission hydraulic oil, etc. by taking advantage of the characteristic that its resistance value is negatively proportional to temperature change. Consequently, automotive oil temperature sensor with NTC thermistor provides more accurate temperature data to the ECU, assisting in optimizing fuel injection strategies, adjusting shift logic, and providing overheat protection.

To obtain more accurate temperature information, oil temperature sensor is typically designed for direct contact with the fluid, enabling the internal NTC thermistor to sense oil temperature changes in real time. Specifically, oil sensor monitoring engine lubricating oil temperature is usually embedded into the side wall of the oil pan or the base of the oil filter housing. The NTC thermistor then contacts the lubricating oil through the sensor's metal heat-conducting casing. This positioning allows the thermistor to capture temperature fluctuations of engine oil during lubrication and cooling process. Particularly during cold start stage, it provides the ECU with low-temperature viscosity compensation signals, preventing component wear caused by inadequate lubrication. For automatic transmission hydraulic fluid temperature monitoring, the oil sensor is usually mounted on the side wall of the valve plate oil passage. This enables the NTC to promptly sense temperature changes in the hydraulic fluid during gear shifts, preventing excessive oil temperatures from affecting the working stability of transmission.

Therefore, with the assistance of oil temperature sensor, the ECU can take protective measures such as adjusting working stage of oil pump and controlling the cooling system based on temperature data from NTC thermistor in sensor under abnormal conditions. This ensures the engine maintains optimal operating temperatures at all times. Considering the complex temperature environment within engines, EXSENSE Electronics recommends the use of VT series automotive NTC thermistor:

1. High accuracy, ensures reliable temperature measurement for automotive oil temperature sensor. This enables the engine management system to select appropriate temperature control method based on more accurate data, thereby improving engine working efficiency and reducing exhaust emission.

2. High-temperature resistance, assists automotive oil temperature sensor in maintaining stable performance within the engine's high-temperature environment, ensuring sensor reliability throughout its entire lifecycle.

3. Excellent sensitivity, enables the automotive oil temperature sensor to promptly detect instantaneous changes in oil temperature, effectively protecting engine operation while significantly extending its service life.

Thus, the importance of EXSENSE automotive NTC thermistor for oil temperature sensors is self-evident. As the core temperature-sensing component of automotive oil temperature sensor, automotive NTC thermistor is crucial for ensuring optimal engine operating temperatures, prolonging engine lifespan, and improving fuel economy.