132results about How to "Small shift shock" patented technology

The invention relates to an electric motor zero torque control bisynchronous shifting method for hybrid vehicles, belonging to the technical field of modern transportation. The method is characterized in that vehicle speed ua and throttle valve alpha are monitored to identify shifting points; throttle percentage is reduced and the electric motor torque is increased; when throttle percentage is less than the given threshold value, a clutch is separated and the electric motor torque is controlled to be zero and original shift is restored; engine speed is adjusted to matched target speed ne, meanwhile zero torque control is performed on the electric motor and a zero torque control map, input voltage Uin and input current Iin corresponding to the given inverter matched target speed nm are inquired and the electric motor speed is controlled to reach the matched target speed nm; when the deviation between the electric motor speed nm and the matched target speed nm of the electric motor is less than the given threshold value, a new shift is moved to; electric motor torque output is restored; when the deviation between the engine speed ne and the matched target speed ne is less than the given threshold value, the clutch is combined; finally, engine torque output is restored. The invention has the effects and benefits of reducing shifting impact, shortening power interruption time and improving shifting comfort.

The invention discloses a three-gear wire control automatic transmission of an electric vehicle. one end of an input gear is connected with an input shaft of the transmission, and the other end of the input gear is frequently engaged to a first-gear high speed gear, a second-gear high speed gear, a third-gear high speed gear and a reverse-gear idle gear along the peripheral outer side of the gear; the first-gear high speed gear, the second-gear high speed gear, the third-gear high speed gear and a reverse-gear high speed gear are respectively connected with a first-gear main shaft, a second-gear main shaft, a third-gear main shaft and a reverse-gear main shaft through a first-gear electromagnetic clutch, a second-gear electromagnetic clutch, a third-gear electromagnetic clutch and a reverse-gear electromagnetic clutch; the first-gear main shaft, the second-gear main shaft, the third-gear main shaft and the reverse-gear main shaft are distributed at the periphery of an intermediate shaft of the transmission; an electric control unit controls the joint and the separation of all gears of high speed gears and a driving gear through all gears of electromagnetic clutches to realize the wire control gear shifting control of the three-gear wire control automatic transmission of the electric vehicle. The three-gear wire control automatic transmission of the electric vehicle has such advantages as compact structure, wire control power gear shifting and no mechanical or hydraulic gear shifting parts.

The invention discloses a micro slip control method during lock-up meshing of a wet clutch, including: firstly, reading current throttle percentage and engine speed; secondly, looking up a micro slip speed diagram to obtain optimal micro slip speed namely MicroSlip Speed; thirdly, calculating the current rotating speed difference between the engine and the input shaft of a gear reducer; fourthly, calculating the current rotating speed N required to be regulated; fifthly, converting the rotating speed difference into corresponding current variation value, namely the current delta I required to be regulated to control relevant solenoid valve of the clutch, through appropriate PID regulation; sixthly, adding the current delta I of solenoid valve required to be regulated the clutch with the current existing effective current and calculating optimal control current of the solenoid valve during micro slip lock-up meshing of the clutch. The invention can effectively reduce shift impact, reduce oil consumption in frequent shift process and can obviously improve operation reliability of the clutch and prolong the service life of the clutch.

The invention relates to a shifting method for an AMT (Automated Mechanical Transmission) automatic gearbox. The shifting method comprises the following steps A, during a driving process of a vehicle, judging whether shifting to other advancing gears or not according to a vehicle driving state parameter and an operation signal, if yes, executing step B, and if not, repeating step A; B, determining a target gear; C, calculating a target rotating speed of an engine according to a rate of the present vehicle speed to the gear speed of the target gear; D, judging whether the target rotating speed of the engine is greater than or equal to an idle speed or not, and if yes, executing steps E-G; E, maintaining the present rotating speed and using a shifting motor for retreating a present gear synchronizer to a neutral gear; F, controlling a gear selecting motor to act, and controlling the rotating speed of the engine to the target rotating speed of the engine when the gear selecting motor moves to the target gear position; G, controlling the gear selecting motor to act, shifting a target gear synchronizer to the target gear, cancelling the control on the rotating speed of the engine and finishing the gear shifting.

The invention relates to a motor and speed changer integrated power assembly for battery electric vehicles. The motor and speed changer integrated power assembly comprises a motor, a speed changer and a differential mechanism; the motor comprises a stator, a rotor and a rotor base, and the stator is located on the inner wall of a motor shell; a first electromagnetic brake and a second electromagnetic brake are further arranged on the inner wall of the motor shell, a gear ring is arranged on the first electromagnetic brake in a matched mode, and a planet carrier is arranged on the second electromagnetic brake in a matched mode; the planet carrier is further respectively provided with three front-row planet wheels and three back-row planet wheels; front-row sun wheels are arranged at one axial end of the rotor base; back-row sun wheels are fixedly connected with flanges on a shell of the differential mechanism through screws; one end of the differential mechanism is located in the tubular rotor base, and the other end of the differential mechanism is located in the motor shell. By means of the motor and speed changer integrated power assembly, two-gear shifting can be achieved through different combinations of the two electromagnetic brakes; meanwhile, the motor and speed changer integrated power assembly is compact in structure, small in size and low in weight, and meets the automobile light-weight principle.

The invention discloses an automatic synchronous shifting system and an electric vehicle, belonging to the technical field of electric vehicles. The automatic shifting system provided by the present invention includes a power mechanism, a deceleration mechanism, a fork mechanism and a shifting mechanism. The deceleration mechanism of the present invention uses a lead screw and a nut sleeve to form a lead screw and nut pair. Compared with the self-locking pin or positioning pin that prevents off-gear in the existing automatic shifting system, the use of the lead screw and nut pair can not only achieve self-locking and The purpose of deceleration also simplifies the structure of the entire shifting system. The present invention also provides an electric vehicle using the above-mentioned automatic shifting system, the automatic synchronous shifting system for electric vehicles not only has a self-locking function, but also has low cost and reliable performance, and also saves the synchronous ring structure, thereby improving The shifting speed is reduced and the shifting shock is reduced.

The invention provides a control method for a power system of an automatic transmission automobile. The engine revolution speed in the upshifting process is controlled by controlling output torque of an engine and pressure of a lock-up clutch of a hydraulic torque converter in the gear shifting process. By controlling the output torque of the engine and the pressure of the lock-up clutch of the hydraulic torque converter in the gear shifting process, the control method can enable the engine revolution speed to be kept in a constant range, and therefore a driver does not perceive the gear shifting process through the change of the engine revolution speed; and the influence of inertia torque on gear shifting can be effectively lowered, and meanwhile the negative effects that combustion is not sufficient, and the use efficiency of fuel oil is reduced are not caused.

The invention relates to the field of transmission control, in particular to an AMT intermediate shaft brake pneumatic control method based on a dual PWM valve. The method comprises the following steps of determining intermediate shaft reduction speed difference control target value; determining intermediate shaft reduction speed rate control target value; determining intermediate shaft reductionspeed rate control tolerance value; determining action time value for preliminarily building brake capacity; starting a brake command, and executing a preliminary brake capacity building stage; executing an intermediate shaft brake capacity fine adjustment stage, and carrying out intermediate shaft brake capacity fine adjustment; decontrolling the intermediate shaft brake capacity; judging whetherthe current intermediate shaft rotating speed is not higher than the intermediate shaft rotating speed control target value or not, and if not, finishing the intermediate shaft brake control process,and finishing intermediate shaft brake; and if the current intermediate shaft rotating speed is higher than the intermediate shaft rotating speed control target value, executing the intermediate shaft reduction speed micro control stage until the intermediate shaft brake is finished. The problems of over brake and in-advance decontrolling in the prior art can be solved.

The invention discloses a high-power hydraulic variable speed transmission device, which comprises an integral torque converter and a planetary speed changer, wherein an input flywheel, a locking clutch and a power taking device are also arranged in the torque converter; four planetary row assemblies, four brakes and two rotating clutches are arranged in the planetary speed changer; all parts are connected through splines or gears; the two rotating clutches and the four brakes are used for realizing different control; the gear requirements of eight forward gears and a neutral gear can be realized; the gear number can be reduced by decreasing the number of planetary rows and the brakes. The high-power hydraulic variable speed transmission device has the advantages that the application power is great; the structure is compact; the deformation is easy; the whole machine arrangement is favorably realized.

The invention discloses a bulldozer gear-shifting controller and a system. The gear-shifting controller is used for acquiring oil temperature data in a clutch oil cavity and first rotate speed data ofan engine so as to determine a first controlled volume value according to the oil temperature data and the first rotate speed data; acquiring first rotate speed data and second rotate speed data of aturbine output end in a torque converter so as to determine a second controlled volume value according to the first rotate speed data and the second rotate speed data; and generating a gear-shiftingcontrol command according to the first controlled volume value and the second controlled volume value. According to the gear-shifting controller, a target current value aiming at the control of a proportional electromagnetic value is determined by adopting the rotate speed of the engine and oil temperature data, a load of a bulldozer is determined based on the speed ratio of the rotate speed of the engine and the rotate speed of a torque converter turbine, and the engagement speed of a clutch is further determined, so that the bulldozer can carry out variable-speed adjustment under the full temperature range and the full rotate speed range, the gear-shifting impact of a gearbox can be effectively reduced, the service life of the gearbox is prolonged, and the comfort of drivers and passengers are improved.

The invention discloses a power motor auxiliary gear-shifting control system and a control method thereof. The power motor auxiliary gear-shifting control system comprises a vehicle control unit, a throttle opening sensor, a motor, a transmission, a gear-selecting and gear-shifting execution device and an output shaft speed sensor, wherein the throttle opening sensor is connected with the vehicle control unit to transmit throttle opening information to the vehicle control unit, the motor is connected with the vehicle control unit and reaches a target speed according to the instruction action of the vehicle control unit after the vehicle control unit receives the throttle opening information, the gear-selecting and gear-shifting execution device is respectively connected with the vehicle control unit and the transmission and indicates gear-selecting and gear-shifting action of the transmission according to the instruction of the vehicle control unit, and the output shaft speed sensor is connected with the vehicle control unit to feed back acquired transmission output shaft speed information to the vehicle control unit. According to the power motor auxiliary gear-shifting control system and the control method thereof, gear-shifting quality can be improved, and the service life of the transmission is prolonged.

The invention discloses a hydraulic automatic gearbox gear-shifting control method and system. The method includes the steps of detecting a gear-shifting signal of an automatic gearbox; when the gear-shifting signal is detected, comparing a current gear-shifting working condition with different preset gear-shifting working conditions to obtain the certain preset gear-shifting working condition matched with the current gear-shifting working condition; executing a clutch control mode corresponding to the certain preset gear-shifting working condition. By means of the hydraulic automatic gearbox gear-shifting control method and system, the clutch control mode can be adjusted in time to adapt to the current gear-shifting working condition, so that gear-shifting impact can be reduced, and the gear-shifting smoothness can be improved.

The invention discloses a multi-mode transmission special for hybrid power. The multi-mode transmission comprises an input shaft, a first planetary gear train, a second planetary gear train, an intermediate shaft, a differential mechanism, a first clutch, a second clutch, a first brake and a second brake. The input shaft is connected with an engine through a torque limiting shock absorber; the first planetary gear train comprises a sun gear A, a planet gear A, a planet carrier A and a gear ring A, the planet gear A is arranged between the sun gear A and the gear ring A and installed on the planet carrier A, and the planet gear A is meshed with the sun gear A and the gear ring A; the sun gear A is mounted on the input shaft; the second planetary gear train comprises a sun gear B, a planet gear B, a planet carrier B and a gear ring B. The invention has the beneficial effects that through the arrangement of the first clutch, the second clutch, the first brake and the second brake, the fixed connection mode of the first planetary gear train and the second planetary gear train is changed, static elements in the planetary gear trains are changed, and various transmission ratios are achieved under the condition that no extra gear pair is additionally arranged.

The invention provides a hybrid dynamic system, which includes an engine, a first motor, a first driving disc which drives with the engine, a first clutch of a first driven disc, a second driving disc which drives with the first motor, a second clutch of a second driven disc and deceleration assemblies which includes a high retaining gear pair, a low retaining gear pair and a deceleration output gear. The high retaining gear pair includes a high retaining driving gear and a high retaining driven gear which are mutually meshed. The high driving gear is connected with a first driven plate. The low retaining gear pair includes a lowretaining driving gear and a low retaining driven gear which are mutually meshed. The low retaining driving gear is connected with asecond driven plate. The deceleration output gear respectively and synchronously rotates with the high retaining driven gear and the low retaining driven gear.The hybrid dynamic system also includes a differential mechanism which drives with the deceleration output gear. Through setting the first clutch and the second clutch, the vehicle can meet torque and speed requirements.

The invention discloses a variable-speed drive device for a tractor. The device comprises a main variable-speed device, an auxiliary variable-speed device and a transfer case idle wheel. The main variable-speed device and the auxiliary variable-speed device are sequentially arranged front and back, one end of the main variable-speed device is connected with a tractor front transmission box, one end of the auxiliary variable-speed device is connected with a tractor rear axle, the transfer case idle wheel is connected with a tractor transfer case, through the above arranging manner, power is transmitted to the tractor rear axle, a tractor front axle and a power output shaft, through combination of the main variable-speed device and the auxiliary variable-speed device, 16 gears are achieved,the main variable-speed device adopts a synchronizer to achieve non-park gear shifting, gear shifting impact and gear shifting force are small, work efficiency is high, an auxiliary variable-speed driven shaft in the auxiliary variable-speed device and a small conical gear are whole, a low-gear driven gear and a high and low gear engaging sleeve cantilever are arranged on the front end of an auxiliary variable-speed driven shaft, the structure is compact, and the axial size of the variable-speed device is effectively reduced. A transfer case driving gear is engaged with the idle wheel on a transfer case idle wheel shaft, occupied space is small, and the speed ratio adjusting is convenient.

The invention relates to a control device and control method for a pneumatic automated mechanical transmission gear shifting force. The control device for the pneumatic automated mechanical transmission gear shifting force comprises a structure characterized in that a control valve piston is connected with a push rod, and the control valve piston slides cooperatively in a hollow valve body so as to divide the valve body into a left cavity and a right cavity. A first air inlet and a first interface communicating with the left cavity, as well as a second air inlet and a second interface communicating with the right cavity are formed in the valve body; quick exhaust valves are arranged at two ends of the control valve piston; a first electromagnetic valve and a second electromagnetic valve communicate with the first interface and the second interface, and inflate a double-piston gear shifting air cylinder through a control valve; the push rod is pushed to move leftwards or rightwards so as to engage a gear and shift the gear, and drive the control valve piston sliding in the valve body to synchronously move at the same time; and the pressure in the double-piston air cylinder is adjusted cooperatively, so that an acting force after gear shift is reduced. The device provided by the invention solves the problems of excessive impact force, big gear shifting noise and easiness in damage of an original gear shifting actuator, and has the characteristics of simple structure, small gear shifting impact force, low noise, difficulty in damage, convenience in operation, no need of position detection, flexibility and reliability.