Will an automatic car move automatically when shifted to D gear?

[MacTimothy]

An automatic car will move by itself when shifted to D gear without pressing the accelerator. Below is an introduction to automatic transmissions: 1. Operating principle: The engine's power is transmitted through the gearbox, which is also a key factor affecting fuel consumption. Generally, an automatic transmission consumes 10% more fuel than a manual transmission. Whether manual or automatic, the more gears a transmission has, the more fuel-efficient it is. 2. Driving techniques: For manual transmission cars, it is recommended to shift gears at higher RPMs. The engine is designed to operate at higher RPMs, and parameters such as dynamic balance and rotational inertia of various components are also designed based on high RPMs. If the engine operates for a long time under non-optimal conditions, the load and wear on internal components will naturally increase, leading to frequent shaking and knocking, and affecting the engine's lifespan. Choosing 3000 RPM as the shifting point ensures that after shifting, the engine operates at around 2300 RPM, keeping it within a healthy RPM range.