Which Gear is the Driving Gear for Automatic Transmission Cars?

[ChloeLynn]

Automatic transmission cars use the D gear as the driving gear. Below is relevant information about the D gear: 1. Gear Introduction: The D gear is one of the most common gears in automatic transmission models, belonging to the forward gear category, covering all forward gears within the vehicle's automatic transmission. When the gear shift lever is placed in the D gear, the hydraulic control system automatically engages the corresponding forward gear oil circuit based on throttle opening signals and vehicle speed signals. The planetary gear transmission system, dual-clutch transmission system, or continuously variable transmission belt system will achieve the corresponding transmission ratio under the control of the actuating mechanism. As the output shaft speed and engine speed change, the system automatically shifts up or down within the forward gears to achieve automatic transmission functionality. 2. Main Purpose: The D gear is the most widely used forward gear in automatic transmission cars. Its primary purpose is to enable the transmission to automatically select the appropriate gear in real-time through the collaboration of the transmission's computer and mechanical structure while the vehicle is moving forward. This eliminates the need for manual intervention in gear shifting, significantly freeing the driver's hands and feet, and enhancing driving convenience, ease, and comfort. 3. Usage Method: To shift from P gear to D gear, firmly press the brake pedal and then quickly move the gear shift lever to the D gear in one motion without pausing at the R gear or N gear. This helps reduce vibration and impact during the gear shifting process.