8results 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 present invention relates to a gearbox shift control system, method, device and tractor for a tractor, and belongs to the technical field of tractor control. The system includes a starting clutch, a gearbox and a controller arranged on the tractor, wherein the starting clutch is controlled by a proportional solenoid valve, and the gearbox includes a plurality of gear clutches, each gear clutch is controlled by a switch solenoid valve, and the proportional solenoid valve and each switch solenoid valve are connected to the controller; the controller is used to obtain the operating parameter information of the tractor in real time; judge whether the current gear of the gearbox of the tractor meets the automatic shifting condition; if the automatic shifting condition is met, a control strategy is generated based on the operating parameter information and a preset control rule, and the operating state of the proportional solenoid valve and at least one switch solenoid valve of the gearbox is controlled based on the control strategy, so that the current gear of the gearbox is switched to the target gear. The slipping phenomenon of the clutch during the gear shifting process is reduced.

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.

The invention relates to a clutch torque reduction method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring vehicle state information; the engine torque reduction process and the current gear shifting type of the vehicle are judged; a clutch torque reduction target torque and a torque safety coefficient are obtained based on the vehicle state information and the engine torque reduction process; and according to the clutch torque reduction target torque, the torque safety coefficient and the final clutch target torque at the last moment, the comprehensive torque reduction target torque is obtained. The clutch is guaranteed to actively and coordinately control the engine torque during torque reduction separation, and the problems of engine speed rising and transmission system oscillation caused by torque reduction of the clutch earlier than that of the engine or long gear shifting time caused by torque reduction of the clutch later than that of the engine can be effectively solved, so that engine speed rising or transmission system oscillation is avoided, and the service life of the clutch is prolonged. Therefore, the driving comfort and the gear shifting speed of the vehicle are ensured.

The automatic transmission comprises a plurality of gear shifting guide rails and a gear shifting execution mechanism, and is characterized in that two adjacent gear positions in the transmission are not on the same gear shifting guide rail; gear shifting forks are arranged on the gear shifting guide rails; the gear shifting executing mechanism can control the two gear shifting guide rails at the same time to achieve linkage that one gear shifting fork executes out-of-gear operation and the other gear shifting fork executes in-gear operation, and out-of-gear operation and in-gear operation are completed in the same action stroke. The driving gear drives the gear shifting gear A and the gear shifting gear B to carry out gear selecting operation, and the time of the gear shifting process is not occupied. According to the automatic transmission, the gear shifting time can be shortened, the gear shifting comfort is improved, and the driving safety is improved.

The present application provides a self-adjusting device for gear meshing, the technical solution of which is as follows: comprising: an engagement sleeve, the engagement sleeve is provided with a guide groove and an internal spline for contacting and cooperating with a target gear engagement ring; a guide tooth, the guide tooth is slidably arranged in the guide groove, an elastic member is arranged between the guide tooth and the guide groove, and the elastic member makes the guide tooth protrude from the internal spline of the engagement sleeve. The self-adjusting device for gear meshing provided by the present application has the advantage of shortening the gear shifting time.