What Causes a Gasoline Engine to Stall at High Temperatures?
2 Answers
Gasoline engine stalling at high temperatures can be caused by various factors such as cylinder scoring, crankshaft bearing seizure, and connecting rod mechanism failure. Below are some relevant introductions about gasoline engines: 1. Introduction One: A gasoline engine is a spark-ignition internal combustion engine that uses gasoline as fuel. It typically adopts a reciprocating piston structure and consists of components such as the engine block, crankshaft connecting rod mechanism, valve train system, fuel supply system, lubrication system, and ignition system. 2. Introduction Two: Gasoline engines have advantages such as being lightweight, low manufacturing cost, relatively low noise, and good cold-start performance. However, they have lower thermal efficiency and higher fuel consumption rates compared to diesel engines. 3. Introduction Three: Most passenger cars and light trucks use overhead valve water-cooled gasoline engines. However, with increasing emphasis on fuel consumption issues, diesel engines are becoming more widely used in such vehicles. Small aircraft engines, which prioritize lightweight and high power-to-weight ratio, mostly use air-cooled gasoline engines with hemispherical combustion chambers.
My car experienced high-temperature shutdown during the last long-distance trip, mainly due to issues with the cooling system. A clogged radiator and non-functioning fan caused engine overheating; the fuel pump overheated and couldn't draw fuel, creating vapor lock that interrupted fuel supply; additionally, spark plugs or ignition coils failed under high temperatures. Thinned-out engine oil with poor lubrication increased friction resistance, also leading to shutdown. Some cars automatically activate the ECU protection system to prevent spontaneous combustion. During repairs, I found that regular radiator cleaning and switching to high-viscosity index oil for summer can prevent this. Driving habits also matter—avoid stomping on the accelerator during extreme heat for prolonged periods, and allow some idle time before parking to let the engine cool down.
