Does an Automatic Transmission Have Idle Speed?
2 Answers
Yes, all motor vehicles have idle speed. Here is some additional information: The meaning of car idle speed: Car idle speed is not a type of speed but rather a working condition. When the engine is running without load, it is called idle speed. When the accelerator pedal is fully released while the engine is running, the engine enters idle speed. The engine speed during idle is referred to as idle speed. Idle speed can be adjusted by modifying the throttle opening size, among other methods. Generally, the optimal idle speed is the lowest RPM at which the engine does not shake. The purpose of idle speed: Avoid useless work—Idle speed overcomes the engine's own operational resistance, maintains the minimum engine speed, and provides convenience for drivers in various driving and temporary parking situations. For example, when waiting at traffic lights or in congested traffic areas, although the time may be short, temporarily turning off the engine can achieve immediate energy-saving and emission-reduction effects.
I've been driving an automatic transmission car for over ten years, using it daily for commuting, so of course I'm familiar with idling! Idling refers to when the car is stationary but the engine is still running, at a very low RPM, usually around 800. This feature is particularly practical—for example, the air conditioning stays on at red lights without interruption, and in winter, you don't have to worry about freezing. It's very convenient. I drive a Toyota Camry, and it idles very smoothly with almost no vibration. However, it's important to note that prolonged idling can increase engine carbon buildup and fuel consumption. For instance, in traffic jams, I try to minimize idling in P gear for too long, which both protects the car and saves fuel. Overall, idling is a basic function of automatic transmission cars, similar to manual transmissions, but the operation is more hassle-free, making it ideal for daily commuting.
