Should You Warm Up Your Car in Winter?
1 Answers
Winter car warm-up is necessary; after prolonged parking, the engine oil flows back to the oil pan at the bottom of the engine. Reasons for warming up the car in winter: 1. Lack of lubrication: After the car has been parked for an extended period, the engine oil flows back to the oil pan at the bottom of the engine. Therefore, when starting the engine after a long period of inactivity (such as overnight), the upper part of the engine is without oil and lacks lubrication. It takes about 30 seconds after starting for the oil pump to circulate the oil to the parts of the engine that need lubrication the most, such as the pistons, connecting rods, and crankshaft. If you start the engine and drive immediately, as long as you don't accelerate aggressively and maintain low-speed operation, the effect is the same as idling. 2. Low fuel supply temperature: Before the engine reaches its operating temperature (approximately between 90-110 degrees Celsius), the fuel supply system, due to the low temperature, cannot effectively vaporize the gasoline completely. When the gasoline is not vaporized and remains in a wet, liquid state, it is difficult to ignite and start the engine. At this point, the choke valve comes into play, restricting some air from entering the cylinders to increase the gasoline/air mixture ratio and raising the engine speed to prevent stalling.
