What does automatic D gear mean?
1 Answers
Automatic D gear is the gear used when an automatic transmission car moves forward. The D gear is generally located in the middle and rear position of the gear shift console, behind the N gear, aiming to automatically select the appropriate gear when the car is moving forward. When the gear shift lever is placed in the D gear, the hydraulic system control device will automatically connect the corresponding forward gear oil circuit based on the throttle opening signal and vehicle speed signal. The planetary gear transmission system, dual-clutch transmission system, or continuously variable transmission belt system will obtain the corresponding transmission ratio under the control of the actuator. As the output shaft speed and engine speed change, the system will automatically shift up or down to the appropriate gear among the forward gears, achieving the automatic transmission function.