What does PTC mean on a car?

[DeJason]

PTC on a car refers to the automotive PTC heater. PTC stands for Positive Temperature Coefficient, which denotes semiconductor materials or components with a large positive temperature coefficient. The PTC in a car is primarily used for preheating the engine in winter and warming the cabin. It is a ceramic heating element designed for starting the car in low-temperature conditions and can be categorized into branch pipe type and flat disc type. The automotive PTC features automatic temperature-controlled heating. Typically fixed on the wall of the vaporization chamber, it directly heats the gasoline inside, rapidly raising the temperature and thereby enhancing fuel vaporization. This not only aids in normal car startup in cold temperatures but also reduces pollution from exhaust emissions and decreases fuel consumption.