How Long Should a Car Warm Up in Winter?
1 Answers
In winter, a car can be driven after warming up for 30 seconds to one minute. Below is an introduction to car warm-up: 1. The correct warm-up method is to start driving after 30 seconds to one minute of idling, but avoid driving at high RPMs at this time. Maintain a low speed with the engine RPM not exceeding 3000, generally keeping it around 2000. Otherwise, the severe wear on the engine and transmission may be irreversible. Once the engine temperature rises to the normal operating temperature (which usually takes 3 to 5 minutes), normal driving can resume. 2. Driving immediately after starting the car is harmful. When starting the vehicle, you may notice that the tachometer needle briefly stays at a position more than double the normal idle RPM (this is more noticeable in automatic transmission cars). This happens because the modern car's computer control module (commonly known as ECU) instructs the fuel injection system to inject more fuel into the cylinders to increase the engine RPM, allowing the engine to warm up quickly in cold conditions. The extent to which the cold-start RPM increases depends on the external ambient temperature and the ECU settings for each specific car model, meaning not all cars will have the same RPM value. Under normal circumstances, the engine RPM will drop significantly within one minute of a cold start.
