9results about How to "Improve shift smoothness" patented technology

The invention discloses a single-motor hybrid power system based on an automatic mechanical transmission and a control method. The system comprises an engine, an automatic clutch, a motor and the automatic mechanical transmission which are connected in sequence. The automatic mechanical transmission comprises an input shaft, a transmission driving gear set, a main shaft, a main shaft gear set, an auxiliary shaft, an auxiliary shaft gear set, a planetary gear mechanism and an output shaft, the planetary gear mechanism comprises a gear ring, a planet gear, a planet carrier and a sun gear; the motor is fixedly connected with the engine, the input shaft is sleeved with the automatic clutch in an empty mode, and the motor is fixedly connected with the automatic mechanical transmission and conducts power transmission through meshing of an input shaft outer spline and a motor inner spline. Different driving modes such as engine driving, motor driving, hybrid driving and energy recovery of the vehicle can be achieved by selecting the working modes of the driving motor, the engine and the automatic mechanical transmission.

The utility model relates to the technical field of vehicle driving devices, in particular to a novel hybrid power assembly driving device, which is characterized in that an engine device is fixedly connected with the input end of a torsion damper device, the output end of the torsion damper device is fixedly connected with a planet carrier component of a power dividing device, and a clutch device is arranged on a sun gear of the power dividing device; the clutch device is connected with a generator device; a gear ring output shaft of the power dividing device and a driving motor input shaft of the driving motor device are connected with a gear mechanism device; a main reduction driven gear and an output device are connected to the differential device, the main reduction driven gear is meshed with the gear mechanism device, and gear shifting adjustment is conducted on the gear mechanism device through the synchronizer power gear shifting device. The synchronizer power gear shifting device is located at the engine end so that gear shifting smoothness can be better achieved, and abrasion can be reduced due to the fact that the synchronizer power gear shifting device is arranged on the middle shaft; the whole structure is novel, the layout is compact, the occupied space is small, and the whole vehicle carrying performance is higher.

The invention belongs to the field of comprehensive transmission of tracked vehicles, and particularly relates to a self-adaptive gear shifting control method of a planetary comprehensive transmission device, which aims at how to utilize a rotating speed signal to realize self-adaptive adjustment control in a rapid oil charging and discharging stage for the first time. A control algorithm based on feed-forward and feedback is formulated, and initial control parameters are calculated through feed-forward control according to clutch structure parameters and electro-hydraulic gear shifting control loop characteristics; and the feedback algorithm performs adaptive adjustment on the initial control parameters by monitoring the actual oil charging and discharging process, and updates the control parameters in the feed-forward control for the control of the next preparation stage. Model reference adaptive control is adopted in a torque phase stage, and by comparing an actual control result with reference model output, an adaptive law is generated through a nonlinear feedback adaptive controller by using deviation of performance indexes to adjust initial control parameters; and differential preceding type PID control is adopted in the inertia phase stage, and the purpose of improving gear shifting quality control is achieved.

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 discloses a lubricating oil composition for improving the friction characteristic of a gear and a preparation method thereof. The lubricating oil composition comprises the following raw materials in parts by weight: 81-95 parts of base oil, 1-4 parts of a gear oil complexing agent, 1-10 parts of a viscosity index improver and 2-5 parts of a friction improved dispersant. The friction-improved dispersant is introduced into the lubricating oil for the gear, so that the problem that the conventional friction-improved dispersant competitively adsorbs with other additives on a metal surface to generate adverse effects on the friction characteristics of an oil product is solved; in addition, the introduction of the substance can effectively adsorb and disperse oil sludge, paint film and other sediments in the oil product, prevents the sediments from gathering and depositing to cause frictional wear, further improves the oxidation stability of the vehicle gear oil, and prolongs the service life of the vehicle gear oil. The prepared lubricating oil composition for the gear has excellent friction characteristics, can effectively improve the friction characteristics of transmission oil, and improves the friction characteristics and gear shifting smoothness of an automobile transmission.

The invention relates to the technical field of vehicles, in particular to a transmission assembly, a drive assembly, a drive axle and a vehicle. One end of the transmission assembly is suitable for being connected with a power unit, the other end of the transmission assembly is suitable for being connected with a differential mechanism, the transmission assembly comprises a planetary structure, the planetary structure comprises a sun gear, and the sun gear is suitable for being in transmission connection with the power unit; and the gear ring surrounds the periphery of the sun gear and is in transmission connection with the sun gear, and the gear ring is connected with the differential mechanism. In the process that a planetary structure participates in gear shifting, due to the fact that the speed ratio can be designed to be small, the stage difference between a first gear and a second gear is small, and gear shifting smoothness is good, the problem that when a planetary reducer serves as a driving unit, gear shifting impact is caused by the fact that the gear shifting stage difference is large due to sun gear input and planet carrier output is solved. Therefore, according to the transmission assembly, the comfort of the vehicle can be improved.

The invention discloses an electromagnetic valve automatic flushing control method in a D-gear mode of an automatic transmission, and belongs to the technical field of transmissions. The method comprises the following steps that whether execution conditions are all met or not is confirmed, if yes, a clutch on a gear is recognized, and a corresponding electromagnetic valve is excluded; washing control is conducted on the remaining electromagnetic valves in sequence according to the washing sequence logic ring; repeatedly washing the sequential logic ring, and if a certain electromagnetic valve does not finish washing in the washing process, continuously washing by taking the electromagnetic valve as a starting point when the washing condition is met next time; and according to the calibrated washing sequence logic ring repetition period and the electromagnetic valve washing times, quitting after washing is completed. Under the D-gear steady-state gear, the non-working electromagnetic valve is scoured according to the scouring sequence logic ring, the method is closer to the actual use working condition, the situation that a certain clutch cannot be subjected to oil charging action for a long time is avoided, the problem that the electromagnetic valve is blocked due to gear shifting after long-distance and high-speed driving is avoided, and the service life of the electromagnetic valve is prolonged. And the gear shifting smoothness and the driving feeling are improved.

The invention discloses a neutral gear position learning method of an AMT multi-gear gearbox and a related device, and relates to the technical field of software, under the condition that neutral gear self-learning triggering conditions are met, the limit position at the position of a non-gear inlet on a neutral gear belt is detected; performing extreme value processing on the extreme position to obtain a neutral gear position of the neutral gear belt; and value verification is conducted on the neutral gear position, and under the condition that the neutral gear position passes value verification, maximum stroke gear selecting action verification is conducted in a reciprocating mode through the neutral gear position so that the neutral gear position can be optimized. According to the method, the unified and accurate neutral gear position can be obtained, the problem that the neutral gear position consistency of the AMT multi-gear gearbox is poor is solved, and the gear shifting smoothness and the success rate are improved.

This utility model belongs to the field of new energy vehicle power transmission technology, and discloses a single-motor two-speed electric drive axle powertrain, including a disc motor, a reducer housing, a first shaft assembly, an intermediate shaft assembly, a reducer end cover, an axle housing, a first half-shaft, a differential, a second-stage reduction passive gear, a second half-shaft, a coupling sleeve, and a differential lock assembly. This solution achieves the advantages of compact structure, short axial dimension, and high power density by adopting an integrated design of an axial flux disc motor and a two-speed reduction mechanism, which is convenient for application in vehicles with high ground clearance requirements and limited installation space. By using a ball screw type shifting actuator in conjunction with motor speed adjustment, synchronizer-free rapid shifting is achieved, improving shifting smoothness and system reliability. The hollow intermediate shaft assembly and lubrication oil passage design make lubrication efficient and the structure simplified, improving operational reliability. The rear-mounted integrated differential lock assembly enhances the ability to get out of trouble in complex road conditions and the vehicle's adaptability.