4results about How to "Shorten shift time" patented technology

This invention discloses a vehicle control method, device, equipment, and storage medium, comprising: acquiring current vehicle driving information; determining resistance information based on the driving information; determining the total output torque demand based on the driving resistance information; and controlling the current vehicle according to the total output torque demand; wherein the current vehicle is a dual-electric drive axle four-motor system. Using this method, the output torque demand of the dual-electric drive axle four-motor system is obtained through driving information, and the actuator and its torque magnitude are determined based on the torque demand. This achieves the effects of balancing drivability and power, reducing shift frequency, reducing shift shock, reducing shift time, and eliminating power interruption during shifting.

The application provides a power uninterrupted continuously variable hybrid transmission, and relates to the technical field of automobile transmission.The scheme is that the continuously variable hybrid transmission comprises a transmission body, a first gear shifting device, a second gear shifting device, a third gear shifting device and a fourth gear shifting device are sequentially arranged from the input end to the output end of the central shaft, the second gear shifting device is arranged between the tenth transmission gear and the eleventh transmission gear of the first hollow shaft, the third gear shifting device is arranged between the fifth transmission gear and the sixth transmission gear of the second hollow shaft, the fourth gear shifting device is arranged at the left end of the front planet carrier, the rear planet carrier is connected with the second hollow shaft and the central shaft through bearings and splines respectively, and the front planet carrier is connected with the second hollow shaft through a bearing.The application has the effects that the gear shifting frequency is reduced, the output power is uninterrupted during the whole vehicle gear shifting process, the continuously variable transmission function is achieved, the gear shifting jerk is eliminated, and the comfort, economy and safety of the whole vehicle are improved.

This invention discloses a method for self-learning the clutch of an AMT (Automated Manual Transmission) in commercial vehicles, specifically including the following steps: Step 1: Determine whether the current vehicle meets the self-learning conditions; if so, proceed to Step 2; Step 2: Clutch self-learning: After activating clutch self-learning, the clutch will perform two rounds of disengagement and engagement; Step 3: After the clutch performs two disengagement and engagement actions, the learned parameters are stored in the TCU (Tracking Control Unit), completing one clutch self-learning cycle; Step 4: Repeat the above process to complete multiple clutch self-learning cycles. The method of this invention defines the complete disengagement point and the first, second, and third contact points by using the input shaft speed as a threshold, resulting in higher recognition accuracy and a simpler and more efficient TCU judgment and calculation logic.

The application discloses a kind of mechanical automatic transmission rotational speed synchronization self-adjusting predictive control method, comprising: the initial length of calculating brake combination signal sending to brake torque reaches constant value time point;Brake shaft speed drop value during brake torque constant time point is calculated to brake torque start to produce brake torque;Brake torque is zero during brake torque from constant brake torque start to reduce, and brake shaft speed drop value;According to the initial value of dynamic speed difference threshold value calculated according to the above results;Test the extreme value of brake friction plate separation torque reduction stage duration;According to the initial value of the extreme value of brake shaft speed curve parameter in separation torque reduction stage;According to the size relationship between the difference between the target speed of brake shaft before braking and current speed and dynamic speed difference threshold value, the rotational speed synchronization of transmission is controlled.The application improves control accuracy, shortens gear shifting time, improves gear shifting smoothness, enhances the robustness and stability of control method under time-varying working condition.