What is the idle speed of an automatic transmission?
2 Answers
Under normal conditions, the idle speed of an automatic transmission ranges between 800 and 900 RPM. Idle speed refers to the operating condition of the engine when the car is in neutral. The idle speed of a vehicle may vary depending on the engine type and model, but the idle speed range generally does not differ significantly. Below are specific details: 1. Lower engine temperature: The idle speed of an automatic transmission during a cold start is around 1200 to 1500 RPM. 2. Normal engine temperature: When the temperature is normal, the idle speed of an automatic transmission typically remains between 800 and 900 RPM. 3. Using D gear without pressing the accelerator: In this case, the idle speed of an automatic transmission is approximately 5 to 10 km/h. Note: When starting the car in a cold state, the idle speed is higher. This is because engine wear is more severe when operating at low temperatures. When the engine control unit detects a low engine temperature, it increases the idle speed to help the engine reach its optimal operating temperature more quickly and adjust to normal working conditions, thereby minimizing wear.