Will an automatic car move automatically when shifted to D gear?
4 Answers
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.
After shifting into D gear, an automatic transmission vehicle doesn't immediately start moving on its own. From my personal driving experience, once you engage D gear, the vehicle enters driving mode, but it will only make slight movement when you lift your foot off the brake pedal. This is called the creep function, which is particularly noticeable on slopes where the car may slowly roll forward—it's primarily designed by the transmission to assist smooth starts and prevent stalling. However, on level ground, the car won't move if the brake remains engaged. Beginners should be careful not to abruptly press the accelerator to avoid accidents. It's advisable to use this feature to reduce fatigue in traffic jams, but don't rely too heavily on it to prevent rollback incidents. Regularly checking transmission fluid and brake systems ensures proper functionality, as older cars or different models (like those with electronic parking brakes) may behave differently and require adaptation.
Yes, putting an automatic transmission car in D gear means it's ready to move, but you need to release the brake to get it going. I understand a bit about how transmissions work - it's because of the torque converter that creates thrust at engine idle, causing the car to creep forward slowly. This creeping effect is more noticeable on slopes, but it's not autonomous driving; you still need to manually control the pedal speed. If it's a new car with an electronic parking brake, it's normal for the car not to move immediately after shifting - you'll need to lightly press the accelerator. Don't get this confused, as unintended movement can be dangerous in parking lots or around pedestrians, so always stay alert when operating. Transmission maintenance is also crucial - insufficient fluid can affect this function and cause jerky movements.
After shifting to D gear, an automatic transmission car usually starts moving slowly, but you need to release the brake. I learned soon after driving an automatic that it gently creeps forward on flat ground, moving naturally in traffic jams. On steep slopes during hill starts, the car might creep a short distance by itself, which greatly helps beginners reduce the risk of stalling. However, it's not completely automatic; you need to get used to pedal control to maintain a safe distance and avoid collisions. Remember to regularly check the car's condition to prevent problems.
