139results about How to "Improve shift smoothness" patented technology

The invention provides a method for controlling oil filling of clutches of an automatic double-clutch gearbox. The method comprises the step of filling oil in advance, wherein the clutches are filled with the oil in advance after pre-shifting of a target gear is finished, and the preset time is maintained; the step of filling the oil for the second time, wherein the clutches of the target gear are filled with the oil for the second time until linkage point pressure is reached; the step of maintaining the linkage point pressure, wherein the linkage point pressure of the clutches of the target gear is maintained until torque is alternated. In the step of filling the oil in advance, the current oil temperature of the gearbox is measured, and filling the oil in advance is carried out according to the current oil temperature of the gearbox. The temperature change of the oil in the gearbox is utilized for controlling the clutch oil filling process, and therefore timeliness and smoothness of clutch motions in the shifting process can be improved, and the fault rate of the automatic wet type double-clutch gearbox can be lowered.

The invention provides a gear choosing-shifting actuator for automatic speed changers, which comprises a gear-choosing actuator and a gear-shifting actuator, wherein the gear-choosing actuator comprises a gear-choosing guide shaft (4), a gear-choosing guide shaft gear (6) and a gear-choosing guide shaft angle sensor (7), and the gear-shifting actuator comprises a gear-shifting shaft (19), a gear-shifting sensor shaft (3), a gear-shifting rocker arm (32), a gear-shifting shaft rack (21) and a gear-shifting sensor shaft angle sensor (18). The gear choosing-shifting actuator is characterized in that the gear-choosing actuator and the gear-shifting actuator mesh with each other through the gear-shifting shaft rack (21) and the gear-choosing guide shaft gear (6). Due to the technical proposal, the gear choosing-shifting actuator has the advantages of compact structure, high transmission efficiency and strong gear choosing-shifting reliability.

The invention provides a pure electric two-speed transmission. The pure electric two-speed transmission comprises an input shaft (1), a reducer (6), an output shaft (7) and a brake (8), and a planetary mechanism which comprises a sun gear (4), a planet gear (3), a gear ring (5) and a planet carrier (2), wherein the planet carrier (2) is fixedly assembled to the input shaft (1), the sun gear (4) is fixedly assembled to the output shaft (7), and the right end of the output shaft (7) is fixedly connected with the reducer (6), the pure electric two-speed transmission is characterized by further comprising a one-way clutch (9), the right end of the output shaft (1) is connected with the left end of the output shaft (7) through the one-way clutch (9), and the gear ring (5) of the planetary mechanism is connected with the brake (8). According to the invention, gears can be shifted only by using one one-way clutch 9 and one brake 8, and one one-way clutch 9 and one brake 8 are only required to be controlled when the gears are shifted, so that the control difficulty is smaller.

The invention discloses an automatic gear shift control system and method of a motor-transmission integrated drive system for an electrical vehicle. The motor-transmission integrated drive system comprises a drive motor, a transmission, a motor controller and a gear shift execution mechanism, wherein the drive motor is directly connected with the transmission through a spline and controlled by the motor controller to output a torque to the transmission; the gear shift execution mechanism is used for finishing the gear shift operation of the transmission; the motor-transmission integrated drive system is characterized in that a vehicle controller is arranged for coordination control on the motor controller and the gear shift execution mechanism to realize automatic gear shift function of the motor-transmission integrated drive system; the vehicle controller and the motor-transmission integrated drive system form the automatic gear shift control system. According to the automatic gear shift control system, the automatic gear shift function of the motor-transmission integrated drive system can be realized and the gear shift quality of the motor-transmission integrated drive system can be improved.

The invention discloses a plug-in type single-motor hybrid electric vehicle transmission which comprises a flywheel shock absorber, an engine connecting clutch, a planet gear set, a gear ring, a planet carrier, a sun gear and a planet row control clutch, wherein the gear ring, the planet carrier, the sun gear and the planet row control clutch are arranged in the planet gear set. The transmission further comprises a motor integrating a starting function, a drive function and a power generating function, a motor shaft connecting the motor with the sun gear, a brake controlling the gear ring to be fixed or rotate, a mechanical speed change system taking charge of transmission gear changes, an input shaft connecting the planet carrier with the mechanical speed change system, an output shaft connecting the mechanical speed change system with a main speed reducer, a battery system and a power distribution and electronic control system. The transmission has the beneficial effects that the structure of a single-motor system, a power synthetic system and the mechanical speed change system is adopted, the power performance is excellent, an engine and the motor work in the most economical rotation speed section, stepless speed regulation is matched with mechanical stepping gear shifting in the acceleration process, acceleration power is not interrupted, and the gear shifting efficiency and the gear shifting smoothness are extremely high.

The invention relates to a double-motor self-adaptive speed pre-regulating multi-gear power coupling device and a control method thereof. The double-motor self-adaptive speed pre-regulating multi-gearpower coupling device comprises a main driving motor (8), a planetary line speed change device (100), an auxiliary motor (15), a vehicle transmission shaft (9) and a vehicle driving axle (10); the planetary line speed change device (100) comprises a planet gear mechanism and a double-way combining device (105); the planet gear mechanism comprises a planetary line sun gear (102), a planetary linegear ring (103), a planetary line planet carrier (108) and a planetary line shell (107); and the planetary line gear ring (103) is jointed with the planetary line shell (107) or a planet carrier output shaft (106) through the double-way combining device (105). Compared with the prior art, the double-motor self-adaptive speed pre-regulating multi-gear power coupling device has the advantages that running requirements of a pure electric bus can be satisfied, the rotation speed of the motor can be pre-regulated before the gear shifting process, self-adaptive speed regulation is realized to a certain degree, and the rotation speed relation is automatically regulated and matched according to gear shifting needs in any running state.

The invention provides a two-speed transmission of a pure electric vehicle, which is relatively simple in structure and less in control difficulty and relatively low in cost. A sun gear (3) of a planetary row is located within a planetary carrier (5); a planetary wheel (4) is rotationally mounted on the planetary carrier (5); a gear ring (6) is mounted outside the planetary carrier (5); the right end of the motor shaft (2) of a driving motor (1) is fixedly connected to the planetary carrier (5) of the planetary row; the right end of the sun gear (3) of a planetary row is fixedly connected with the left end of a main shaft (7) of a reducer (11); and a gear ring (6) thereof is fixedly connected with the right end of an outer ring (8). The two-speed transmission has the characteristics that a clutch (10) is a high-speed-disengage centrifugal clutch, and is connected to the lower end of the outer ring (8) and the planetary carrier (5) of the planetary row, and the middle of the outer ring (8) is connected with a brake (9).

The invention relates to a method for shutting off cylinders and reducing torsion of gasoline engines. The method is applied to gasoline engines with three or more cylinders. The method is characterized by adding mixed gas self-adaption control function through special control software for mixed gas self-adaption on the basis of general gasoline direct injection engine air-fuel ratio closed-loop function; two engine operation cycles are used as a cylinder shutoff control period for sending gasoline injection commands of gasoline injectors; through combination of adjustment of ignition angles,the more accurate torsion reduction requirement can be achieved. The method specifically comprises eight steps. The method has the beneficial effects that the functions of calculating torsion reduction efficiency, coordinating torsion reduction, making cylinder shutoff strategy, executing cylinder shutoff and correcting ignition are added into ECU control strategy under the premise of not adding engine mechanical structures and electronic device hardware cost; finally, the engine torsion reduction accuracy is more than doubled; the engine torsion reduction effect of the vehicle during shiftinggears is effectively improved; the gear shifting smoothness of the vehicle is improved.

The invention provides a vehicle control method. The vehicle control method comprises the steps that when an engine drives a vehicle to run through two clutches, whether gear shifting conditions are met is judged, and if yes, the current first output ends or second output ends connected with the input ends of the two clutches are controlled to be separated; when the first output ends or the second output ends connected with the input ends of the two clutches are separated until reaching sliding friction points, an ISG motor is controlled to drag the engine to carry out rotation speed adjustment, and a drive motor is controlled to improve output torque to maintain the drive force needed by the vehicle according to the torque requirement of the vehicle; when the current rotation speed of the engine is within the target rotation speed adjustment range, the current second output ends or the first output ends separated from the input ends of the two clutches are controlled to be connected with the input ends of the two clutches to achieve gear shifting. The vehicle control method has the advantages that gear shifting time is short, gear shifting smoothness is high, and the two clutches are long in service life. The invention further provides a vehicle control system and a vehicle.

The invention provides a gear shifting control method and device for a pure electric mode of a hybrid electric vehicle which belongs to the technical field of vehicles, and solves the problem that inthe prior art, the power interruption time is long during gear shifting. The gear shifting control method for the pure electric mode of the hybrid electric vehicle comprises the steps of when it is judged that a target gear is inconsistent with a current gear according to the real-time working condition information of the vehicle, entering a gear shifting mode; unloading the torque of a driving motor to zero; enabling a synchronizer to be disengaged from the current gear to a neutral gear; when the synchronizer is disengaged to the synchronization point of the current gear, sending out a speedregulation instruction signal through a gearbox controller; using a motor controller to control the driving motor to adjust the speed, and when the rotating speed of the driving motor reaches the target rotating speed, unloading the torque of the driving motor to zero; and enabling the synchronizer to enter the target gear, and recovering the torque of the driving motor to the target torque. Theinvention further provides a gear shifting control device for the pure electric mode of the hybrid electric vehicle. According to the invention, the gear shifting power interruption time in the pure electric driving mode can be shortened.

The invention provides a planet row type two-gear transmission of a BEV, the structure is relatively simple, the cost is low and the control difficulty is small. The planet row type two-gear transmission of the BEV comprises a driving motor (1), a motor shaft (2), an output shaft (7), an outer ring (8), a clutch (10), a brake (9) and a planet row, wherein a sun wheel (3) of the planet row is located in a planet carrier (5), a planet wheel (3) of the planet row is rotationally mounted on the planet carrier (5), a gear ring (6) of the planet row is located on the gear row outside of the planet carrier (5), the right end of the motor shaft (2) of the driving motor (1) is fixedly connected with the sun wheel (3) of the planet row, the right end of the planet carrier (5) of the planet row is fixedly connected with the output shaft (7), and the gear ring (6) is fixedly connected with the left end of the outer ring (8). The planet row type two-gear transmission of the BEV is characterized in that the clutch (10) is a high-speed combined centrifugal clutch and is connected with the right end of the outer ring (8) and the planet carrier (5) of the planet row respectively, and the brake (9) is connected with the middle of the outer ring (8).

The invention discloses a three-gear parallel-axis type limping dual-motor single-planetary-line hybrid power system with a power take-off module. The system comprises an engine, a first motor, a second motor, a speed regulating mechanism, a shell, a first central shaft, a second central shaft and an output shaft, wherein the front end of the first central shaft penetrates out of the shell and is then connected with the engine, the first central shaft is sleeved with a first hollow shaft, the rear end of the first central shaft is in transmission connection with the hollow shaft through a planetary line, the rear end of the planetary line is connected with the second central shaft, the rear end of the second central shaft is in transmission connection with the output shaft, the rear end of the output shaft penetrates out of the shell to transmit power to a wheel system, the speed regulating mechanism is in transmission connection with the second central shaft and the output shaft, the first motor is in transmission connection with the hollow shaft, and the second motor is in transmission connection with the output shaft. The system provided by the invention has the advantages of being capable of effectively improving a space utilization rate, rich in gear, wide in vehicle model adaptability and the like.

The invention relates to a motor-driven planetary gear train gear shifting mechanism, which consists of a planetary gear train mechanism, a synchronizer and a gear shifting transmission fork mechanism, wherein the planetary gear train mechanism comprises a center wheel, an inner gear ring, a planetary carrier and three planetary gears; the planetary carrier is formed by the fact that a disk is coaxially connected with one spindle; the three planetary gears are evenly distributed on the disk and are respectively meshed with the center wheel and the inner gear ring; one side of the inner gear ring is connected with a tubular shaft sleeve; the shaft sleeve sheathes the spindle of the planetary carrier; one side of the synchronizer sheathes the shaft sleeve of the inner gear ring, and the other side of the synchronizer sheathes the spindle of the planetary carrier; the gear shifting transmission fork mechanism comprises a transmission fork, a ball screw and a servo motor. According to the motor-driven planetary gear train gear shifting mechanism, the ball screw driven by the servo motor is used for driving a gear shifting transmission fork to realize gear shifting, so that gear shifting impact is small, and gear shifting smoothness and service life are improved and prolonged. Since the servo motor is supplied with power by an automobile battery instead of directly consuming the kinetic energy of an engine, the efficiency of the engine is effectively improved.

The invention relates to the field of engines, and puts forward a gear shifting method and device for an automatic catch vehicle. The method comprises the following steps: in a gear shifting process,a gearbox controller is used for calculating a practical torque transmission ratio transferred by a clutch side according to the torque distribution of two clutches so as to send a practical torque transmission ratio to the engine controller. The engine controller obtains a wheel rim torque according to practical vehicle speed and an accelerator pedal position by table look-up, the wheel rim torque and the practical torque transmission ratio are combined to obtain a practical output torque, and the engine is controlled to output the practical output torque. In a gear shifting process, an original gear shifting strategy is changed, so that the practical torque transmission ratio calculated by the gearbox controller more conforms to real-time changes in a gear shifting process so as to guarantee stable vehicle acceleration in a gear shifting process, power failure feeling in the gear shifting process is eliminated, and gear shifting smoothness is improved.

The invention discloses a vehicle hybrid power system and a control method thereof. The system involves an engine, a hybrid power module and a double-input-shaft speed change mechanism, wherein the hybrid power module is composed of a motor, a planetary gear train and a first clutch, the planetary gear train is provided with at least three rotating shafts, the three rotating shafts comprise a rotating shaft X1, a rotating shaft X2 and a rotating shaft X3, axes of the three rotating shafts are on one straight line, the rotating speed of the rotating shaft X2 is between the rotating speed of therotating shaft X1 and the rotating speed of the rotating shaft X3, a first clutch is arranged between any two of the three rotating shafts, a power output shaft of the engine is connected with the rotating shaft X3 or the rotating shaft X1 of the planetary gear train and a second input shaft of the double-input-shaft speed change mechanism, a rotor of the motor is connected with the rotating shaft X1 or the rotating shaft X3, and the rotating shaft X2 is connected with a first input shaft of a double-input-shaft gearbox. According to the system and the method, the transmission efficiency is high, multiple gears are provided, the three-axis double-freedom-degree planetary gear train is introduced, a vehicle is driven to start by the differential between the engine and the motor, starting of the vehicle is stable, the smoothness of gear shifting is good, and the impact of gear shifting is small.

The invention provides a two-shift pure electric vehicle power system with a relatively simple structure, low cost and less control difficulty. The two-shift pure electric vehicle power system comprises a clutch, a transmission and an output shaft of a brake, and a planetary row. A sun wheel of the planetary row is located within a planetary carrier, planetary wheels of the planetary row are rotatably mounted on the planetary carrier, and a gear ring of the planetary row is located outside the planetary carrier. The right end of the motor shaft of a drive motor is fixedly connected with the sun wheel of the planetary row, and the right end of the planetary carrier of the planetary row is fixedly connected with the output shaft. The two-shift pure electric vehicle power system is characterized in that it further comprises an outer race and a one-way clutch, the one-way clutch and the clutch of the transmission are positioned side by side between the drive motor and the sun wheel of the planetary row in the left-and-right direction, the outer ring of the one-way clutch is fixed, the inner ring is connected with the left end of the outer race, the inner drum of the clutch of the transmission is connected with the motor shaft of the drive motor, the outer drum is connected with the left end of the planetary carrier of the planetary row, the right end of the outer race is fixedly connected with the gear ring of the planetary row, and the middle part is connected with the brake.

A 4DHT hybrid electric vehicle transmission comprises a flywheel damper, an engine connection clutch, planetary gear sets, gear rings, planet carriers, sun gears, planetary gear set control clutches, starting function, driving function and power generating function integrated motors, motor shafts, brakes, input shafts, a first output shaft, a first output shaft clutch, a second output shaft, a second output shaft clutch, a single-way clutch, a locking clutch and a differential. The gear rings, the planet carriers and the sun gears are arranged in the planetary gear sets which are used for power synthesis, and the planetary gear set control clutches are arranged between the gear rings and the planet carriers to control relative movement or fixation of the gear rings, the planet carriers and the sun gears. The motor shafts are used for connection with the motors and the sun gears, and the brakes are used for controlling fixation and rotation of the gear rings. By control of an engine, the motors and each torque control element, functions of pure motor driving, engine driving, hybrid power driving, power generating in vehicular static state and running state, energy recovering and the like of a vehicle are realized.

The invention discloses a hybrid driving system with a three-clutch automatic transmission and a control method thereof. In order to solve a problem of the traditional hybrid driving system that total powers of an engine and a driving motor cannot be sufficiently utilized or the driving motor cannot always operate within an optimal output characteristic rotation speed range, the hybrid driving system with the three-clutch automatic transmission comprises a first power converter, a starter / generator integrated machine, an engine, a fourth clutch, a driving motor, an energy storage device, a second power converter, the three-clutch automatic transmission, a differential mechanism, a fourth clutch output shaft end gear, a driving motor output shaft end gear and a transmission input shaft end gear, wherein the transmission input shaft end gear is mounted on a transmission input shaft of the three-clutch automatic transmission; and the fourth clutch output shaft end gear, the driving motor output shaft end gear and the transmission input shaft end gear are engaged with each other in sequence. The invention further provides a control method for the three-clutch automatic transmission.

The invention belongs to the technical field of hybrid power, and relates to a hybrid power driving system and a vehicle. The hybrid power driving system comprises an engine, an engine output shaft, afirst motor, a second motor, a hydraulic torque converter, a first clutch and a transmission, the transmission comprises a transmission input shaft, a transmission output shaft, a speed change gear mechanism and a gear shifting synchronizing mechanism, the hydraulic torque converter is provided with a locking clutch, and the gear shifting synchronizing mechanism only comprises one or more clutches. According to the hybrid power driving system and the vehicle, gear shifting is achieved through combination of the hydraulic torque converter and the clutch(es), a gear shifting synchronizer adopted by an existing transmission is omitted, and the gear shifting smoothness is good. The vehicle adopting the hydraulic torque converter has the advantages of being stable and comfortable in starting,easy to operate by a driver and the like, and is more suitable for urban working conditions or non-road working conditions.

The invention provides a starting and gear shifting coordination control method of a starting engine of a P2 configuration hybrid power vehicle. The method comprises a starting-gear shifting coordination process for the gear shifting in a starting process of the starting engine and a gear shifting-starting coordination process for starting of the starting engine in a gear shifting process, the starting process and the gear shifting process of the starting engine can be carried out in parallel under any working condition, and the situation that the mode switching or gear shifting time is too large due to the fact that the two processes are mutually independent is avoided; and in addition, by coordinating the starting process and the gear shifting process, on the basis of shortening the modeswitching and gear shifting time, mutual interference between the starting process and the gear shifting process is avoided, and the power response and the gear shifting smoothness of the whole vehicle are improved.

The invention discloses a seamless gear shifting automobile automatic transmission. The seamless gear shifting automobile automatic transmission comprises an input shaft, an output shaft and a gear shifting mechanism, wherein the gear shifting mechanism comprises a gear shifting motor and a gear shifting drum; a shifting fork, a transmission gear and a three-position bidirectional controllable overrunning clutch are arranged in each gear; the overrunning clutch is meshed with the transmission gear; the overrunning clutch and the transmission gear are respectively arranged on the input shaft or the output shaft. During gear shifting, the gear shifting motor drives the gear shifting drum to rotate, when the gear shifting drum rotates for one preset angle, the overrunning clutch in a corresponding gear is switched among an idle state, a forward driving reversed overrunning state and a reversed driving forward overrunning state, a three-position bidirectional controllable overrunning clutch is arranged in each gear, an object gear enters a driving state firstly and then a current gear enters the idle state during gear shifting, a clutch coupled with an engine is not required to be started during gear shifting, and mechanical seamless gear shifting is realized.

The invention discloses a two-clutch double-row planetary gear four-gear automatic transmission. The transmission comprises an input shaft, input end double clutches, a front shaft assembly, a box body, a first planetary row, a second planetary row, a rear shaft assembly, output end double clutches and an output shaft, wherein the input end double clutches comprise a first clutch and a second clutch, the front shaft assembly comprise a first sun wheel front shaft and a first front planet carrier front shaft, the first planetary row comprises a first sun gear, a first front planet carrier, a first rear planet carrier, a first planetary gear shaft, a first planetary gear and a first gear ring, the second planetary row comprises a second gear ring, a second planetary gear, a second planetarygear shaft, a second planet carrier and a second sun gear, the rear shaft assembly comprises a second sun gear rear shaft and a second planet carrier rear shaft, and the output end double clutches comprise a third clutch and a fourth clutch. According to the transmission, the clutches are arranged outside the box body, the churning loss of a gearbox is reduced, the efficiency of the planetary geartransmission is very high, the multi-gear adjustment of the transmission is realized, so that the chance that a motor works in a high-efficiency area is increased, the economy of the whole vehicle isimproved, and the driving mileage is increased.

The invention relates to a permanent magnet torque converter. The permanent magnet torque converter is characterized in that a coupling transmission work condition and a slip transmission work condition are achieved by permanent magnetic field force; torque can be changed in the slip transmission work condition; and the permanent magnet torque converter is suitable for various traditional vehicles, railway vehicles, new energy vehicles, electric bicycles, motorcycles, industrial and mineral machinery, ships, aircrafts and the like as a transmission component, and is especially suitable for the new energy vehicles, the traditional vehicles and the railway vehicles. The permanent magnet torque converter is characterized by structurally comprising a complicated magnetic disk, a simple magnetic disk, a magnetic disk rack, a permanent magnet, a windup spring and a bearing part; the power can be transferred according to the coupling transmission work condition and the slip transmission work condition; and the torque is changed according to the requirements in the slip transmission work condition.

The invention belongs to clutches, in particular to a device for reducing the towing loss and abrasion of wet dual-clutch. The device comprises an input shaft, a driven disk, a clutch shell, a driving plate, a driven plate, a clutch pressure plate, a return spring and an output shaft and is characterized in that release springs are distributed along the periphery of projections of the driving plate, and the projections are matched with the clutch shell, the release springs are fixed on the driving plate by bolts, there or more than three of release springs are adopted and are uniformly distributed as far as possible according to the number of the projections on the driving plate and are arranged at the same side. The device has a simple structure, is safe and reliable, is convenient to machine and manufacture and effectively solves the problem of non-uniform gaps of the driving plate and the driven plate in a combination and separation process of a wet multi-disc clutch and at the separation state of the wet multi-disc clutch on the condition that the less cost is increased, thereby reducing the towing loss of the clutch at the separation state, ensuring the clutch to effectively separate and uniformly combine during shifting, prolonging the service life, increasing the accuracy of shifting control and improving the smoothness of automobile shifting and riding comfortableness.

The invention discloses a single-gear-ring dry-friction external-control three-gear transmission. The single-gear-ring dry-friction external-control three-gear transmission comprises a planetary gear train transmission case and a gear shift control element outside the case, wherein the planetary gear train transmission case comprises a first gear set, a second gear set, a planetary carrier, a gear ring and a case body; the first gear set comprises a first sun gear and a first planet gear; the second gear set comprises a second sun gear and a second planet gear, and the second planet gear is further separately engaged with the first planet gear and the gear ring; the first planet gear and the second planet gear are separately arranged on the planetary carrier, and the planetary carrier is connected with one end of a power output shaft; the gear shift control element comprises a first brake for braking the first planet gear, a second brake for braking the gear ring and a clutch. According to the transmission, through controlling the clutch, the first brake and the second brake, the stability of few-gear and large-speed-regulation-range gear shift is achieved, radial and axial dimensions of the transmission are reduced, and thus, the transmission can be extensively applied to electric automobiles.

The invention discloses a dry friction external control four-gear transmission. The dry friction external control four-gear transmission comprises a gear-shifting control element and a planetary gear train gearbox which are arranged outside a box. The planetary gear train gearbox comprises a first gear set, a second gear set, a third gear set, a first planet carrier, a second planet carrier, a gear ring and a box body. The gear-shifting control element comprises a first dry friction clutch, a second dry friction clutch, a first brake and a second brake. By means of the dry friction external control four-gear transmission, by controlling the clutches, the first brake and the second brake, gear-shifting stability within the small-gear and large-adjustable-speed range is achieved, the radial and axial dimensions of the transmission are decreased, and the dry friction external control four-gear transmission can be widely applied to hybrid electric vehicles.

The invention discloses an electronic shifting system of a vehicle mechanical gearbox. The electronic shifting system of the vehicle mechanical gearbox comprises a controller, a pneumatic-electric united pump, an electric pushing rod pump and an electronic shifting handle. The pneumatic-electric united pump and the electric pushing rod pump are controlled by the controller. The pneumatic-electric united pump is connected with a clutch. The electric pushing rod pump is connected with a gear selecting and shifting mechanism. According to the electronic shifting system of the vehicle mechanical gearbox, a manual operation rod on a manual gearbox is changed to an electric pushing rod so that electric shifting operation can be achieved; a clutch pedal mechanism is changed to the pneumatic-electric united pump so that automatic clutch operation can be achieved; the electronic shifting handle (or a knob) is additionally arranged, so that individualized shifting operation is achieved and adaptability is enhanced; the controller is additionally arranged, so that smooth shifting and interactive processing of relevant information are achieved.

The invention discloses an electronic shifting system of a vehicle mechanical gearbox. The electronic shifting system of the vehicle mechanical gearbox comprises a controller, an electric hydraulic pump, an electric pushing rod pump, an electronic shifting handle, a brake pedal and a power source. The electric hydraulic pump and the electric pushing rod pump are controlled by the controller. The electric hydraulic pump is connected with a clutch. The electric pushing rod pump is connected with a gear selecting and shifting mechanism. According to the electronic shifting system of the vehicle mechanical gearbox, a manual operation rod on a manual gearbox is changed to an electric pushing rod so that electric shifting operation can be achieved; a clutch pedal mechanism is changed to the electric hydraulic pump so that automatic clutch operation can be achieved; the electronic shifting handle (or a knob) is additionally arranged, so that individualized shifting operation is achieved and adaptability is enhanced; the controller is additionally arranged, so that smooth shifting and interactive processing of relevant information are achieved.

The invention provides a power system of a pure electric automobile. The system comprises a drive motor (1) equipped with a motor shaft (2), a speed changer equipped with a clutch (7) and a brake (8), an output shaft (10) as well as a planet row of which a solar wheel (3) is located in a planet carrier (5), a planet wheel (4) is installed on the planet carrier in a rotatable manner, and a gear ring (6) is located beside the planet frame, wherein the right end of the motor shaft of the drive motor is firmly connected to the solar wheel of the planet row; and the right end of the planet frame of the planet row is firmly connected to the output shaft. The system also comprises an outer ring (9) and a one-way clutch (11), wherein the one-way clutch and the clutch of the speed changer are placed in a side-by-side manner and located between the drive motor and the solar wheel of the planet row; the outer ring of the one-way clutch is fixed, and the inner ring is firmly connected to the left end of the outer ring; an inner drum of the clutch is connected to the motor shaft of the drive motor, and the outer drum is connected to the middle part of the outer ring; and the right end of the outer ring is connected to the brake of the speed changer and the gear ring of the planet row at the same time.

The invention discloses a gear position determining of an ATM transmission. The method is characterized in that the gear limiting positions are corrected by learning, and meanwhile, the accurate position of each gear and the synchronizing point position of each gear are learned, so that the service life of each mechanical part in the transmission gear is prolonged; the problem of abnormal noise ingear shifting is solved; and meanwhile, the gear shifting time is reduced; the gear shifting is smoothly carried out. The invention also discloses a gear position determining system and device of theATM transmission and a computer-readable storage medium. The system and the device have the abovementioned beneficial effects.