Will an automatic transmission car move when shifted to R gear without pressing the accelerator?
3 Answers
Here is an introduction to whether an automatic transmission car will move when shifted to R gear without pressing the accelerator: 1. Introduction one: During the idle stage, without pressing the accelerator, the engine still burns gasoline to perform work. At this time, the fuel injector and the engine's air intake and exhaust mechanisms do not operate based on the accelerator's action but follow the parameters set by the vehicle system to supply fuel, air, and perform work. 2. Introduction two: The idle state refers to a working condition when the engine is running without load. When the engine is running, if the accelerator pedal is completely released, the engine is in an idle state. When adjusting the idle speed, the RPM should not suddenly increase or decrease.
As a seasoned driver with years of experience driving automatic transmission cars, I can confidently tell you that shifting to R gear without pressing the accelerator will indeed make the car move backward slowly on its own! At first, I was quite puzzled, but later I realized this is a special design of automatic transmissions. The principle is that when the engine is idling, there's still a slight amount of power transmitted to the wheels, causing the car to creep slowly like a snail. When reversing, I hardly need to press the accelerator; just relying on this creeping motion allows me to control the position, which is especially convenient. However, I must remind you that this trick doesn't work when reversing on a steep slope—then you'll need to lightly press the accelerator for it to be effective. Another tip: remember to release the foot brake before reversing, otherwise the car will be locked and won't move. Now, I rely entirely on this feature for parking, and it's much more precise than using the accelerator.
I've noticed that every time I shift my automatic SUV into reverse (R) gear and release the brake, the car automatically rolls backward. This is actually quite convenient, especially when backing up in the neighborhood—no need to worry about throttle control. A mechanic once explained to me that it's similar to the half-clutch state in a manual transmission, where the engine still delivers minimal power. However, I recommend keeping your foot hovering over the brake while reversing. Even though the speed is slower than walking, you can stop immediately if a child suddenly runs into the path. Also, a heads-up: if the air conditioning is on or the car has been sitting in the summer sun, the creeping speed might slow down a bit, which is completely normal—no need to worry too much.
