TWI574860B - Control device for multi-mode continuously variable transmission mechanism - Google Patents

Description

Multi-mode stepless shifting mechanism control device

The invention relates to a control device for a multi-mode stepless shifting mechanism, in particular to a control device suitable for a multi-mode stepless shifting mechanism of a locomotive.

For a general vehicle, if the vehicle is driven by the stepless shifting mode, a stepless shifting mechanism must be provided in the vehicle. Generally, the mechanical V-belt has a stepless shifting structure, and the parameters such as the ball counterweight and the spring force of the drive disc spring are used to achieve the specific shift mode required. Therefore, only the single shift mode can be set.

In view of the increase in demand, there is a multi-mode stepless shifting mechanism. For example, the multi-mode stepless shifting mechanism disclosed in the applicant's patent application No. 201447142 filed by Sanyang Industrial Co., Ltd. has a plurality of sections. The function of the type, but the main control mode of the shift mode is still directly controlled by the rider, and the general mode or the fueling mode is selected according to the current road condition, and a switching action is performed. If the rider is riding, Innocent control, when the engine is operating in the fuel-saving mode, however, in the case where sudden acceleration is required, there is a situation in which the acceleration performance of the engine cannot be fully utilized because the stepless shifting mechanism is in the fuel-saving mode.

With the development of the electronic control system, the electronically controlled V-belt has a stepless shifting structure. The different shifting modes are directly set in the computer and controlled directly by the computer. However, such systems require complicated computer hardware and Software settings can achieve the required functions, and the cost is naturally much higher.

For example, the embodiment disclosed in the Taiwan Patent No. I304460 is based on the structure of a general mechanical beltless transmission, which uses a motor to provide thrust to the sliding drive disc set. By controlling the motor to push and outputting two sets of different modes of thrust, the force of the sliding drive disc of the stepless transmission is controlled, and the sliding drive discs are located at different axial positions to obtain two sets of shifting characteristics. Because the switching of the patent system uses the motor to directly apply force to the sliding driving disc, the required thrust is large, that is, the horsepower required by the motor is large, so the motor needs to be large, and the space and weight thereof are large, For space-constrained locomotives, it is not ideal and there is room for improvement.

Because of this, in the spirit of active invention and creation, we have considered a "control device for multi-mode stepless shifting mechanism" that can solve the above problems, and finally completed the present invention after several research experiments.

The main object of the present invention is to provide a control device for a multi-mode stepless shifting mechanism, which can detect the machine by using a throttle opening sensor. The throttle opening change rate or the throttle position detector detects the throttle opening position of the locomotive, and automatically changes the axial position of the movable platen, thereby enabling the multi-mode stepless shifting mechanism to be between the normal mode and the fueling mode. Make changes to respond to different road conditions.

Another object of the present invention is to provide a control device for a multi-mode stepless speed change mechanism, which can provide a thrust control of the axial movement of the movable pressure plate by using a motor of the switching module, and directly apply force to the sliding drive disk as compared with the conventional one. The thrust required by the invention is small, that is, the horsepower required for the motor is small, so the motor can be miniaturized, and the space and weight are small, and the overall design of the locomotive can save space and weight.

In order to achieve the above object, the control device of the multi-mode stepless shifting mechanism of the present invention is assembled on a locomotive having an engine, and the multi-mode stepless shifting mechanism comprises: an input shaft and a driving disc group, and the driving disc group The utility model comprises a driving disc, a sliding driving disc, a non-moving pressing plate, a plurality of driving elements and a movable pressing plate having a plurality of protruding portions; the movable pressing plate is arranged on the outer side of the non-moving pressing plate, and is coaxially slidably arranged on the input shaft; the driving plate and the stationary plate The pressure plate is coaxially fixed on the input shaft, and the sliding drive plate is located between the driving plate and the non-moving plate, and is coaxially slidably disposed on the input shaft. When the input shaft rotates, the plurality of driving elements can be pushed and pushed by the centrifugal force thereof. The driving plate is axially slid along the input shaft; and the fixed pressing plate is provided with a plurality of slots, and each protruding portion of the movable pressing plate can extend into each slot.

The control device of the multi-mode stepless speed change mechanism comprises: a switching module, a throttle opening sensor for detecting the rate of change of the throttle opening of the locomotive, and a throttle position detector for detecting the opening of the locomotive throttle And one electricity Sub-control unit. Wherein, the switching module is connected with the movable pressing plate, the switching module is used for controlling the axial movement of the movable pressing plate, and the axial position of the movable pressing plate is changed, and the multi-mode stepless shifting mechanism is divided into the general position according to the axial position of the movable pressing plate. Mode and fueling mode. In addition, the electronic control unit is electrically connected to the switching module, the throttle opening sensor and the throttle position detector. When the engine is in the starting state and the multi-mode stepless shifting mechanism is in the normal mode, the throttle opening degree changes to a predetermined rate of change or the throttle opening degree reaches a predetermined opening degree, and the switching module controls the axial direction of the movable pressure plate. Move to change the multi-mode stepless shifting mechanism from the normal mode to the fueling mode.

In addition, when the engine is in the starting state and the multi-mode stepless shifting mechanism is in the fueling mode, the throttle opening degree change rate is less than the predetermined rate of change or the throttle opening degree is less than the predetermined opening degree, and is maintained for a predetermined time, the switching module is The axial movement of the movable platen is controlled to change the multi-mode stepless shifting mechanism from the fueling mode to the normal mode.

The predetermined rate of change may be 160 to 200 degrees per second, the predetermined opening may be 70% to 90%, and the predetermined time may be between 3 and 5 seconds.

The switching module may include a driven gear having an internal thread, a driving gear meshing with the driven gear, a motor coupled to the driving gear, and a sleeve having an external thread. Wherein, the sleeve sleeve is sleeved on the set portion of the movable pressure plate, and the sleeve is screwed to the internal thread of the driven gear by the external thread.

The operation principle of the above switching module is that the driven gear rotates by the motor to drive the driven gear to rotate, and the driven gear is screwed to the outside of the sleeve by the internal screw, and the driven gear is fixed in the axial direction. When the driven gear rotates, the inner sleeve and the outer screw can act to drive the sleeve to perform axial displacement, so that the displacement of the movable pressure plate in the axial direction can be driven by the movement of the sleeve.

The above switching module can use a motor, a gear set and a screw to convert the rotational motion of the motor into an axial displacement. In addition, it can also be achieved by means of levers, solenoid valves, linear slides and the like.

In addition, the present invention may further include a ball bearing sleeve disposed on the sleeve of the movable platen and adjacent to the inner annular surface of the sleeve of the switching module so that the sleeve does not rotate together with the movable platen.

Furthermore, the ball bearing can be further disposed on the input shaft to abut the inner ring surface of the driven gear of the switching module, so that the driven gear does not rotate together with the input shaft.

The front end of each protruding portion of the movable pressing plate may be connected with a stopping block, and the plurality of driving components are disposed between the sliding driving plate and the plurality of blocking blocks, and each blocking block is connected to the fixed pressing plate by a connecting rod . The two ends of the blocking block are respectively pivotally connected with the protruding portion and the connecting rod of the movable pressing plate, and the two ends of the connecting rod are respectively pivotally connected with the stopping block and the fixed pressing plate. Thereby, the four members of the blocking block, the connecting rod, the fixed pressing plate and the movable pressing plate can be pivotally connected to each other, thereby forming a four-bar linkage mechanism, wherein only the movable pressing plate can be axially moved by the switching module, that is, The protruding portion of the movable platen can be axially moved, thereby changing the contact position and angle of the blocking block with the driving element, and achieving the function of having different shifting modes.

In addition, the number of the above plurality of slots may be four, six, eight or other quantities. Moreover, the above plurality of driving elements may be balls or rollers One.

The above-mentioned throttle position detector can be a switch or other equivalent function mechanism, which is disposed on one of the throttle handles of the locomotive. When the throttle handle is rotated to open the throttle opening to the predetermined opening degree, the switch is activated to promote the switching module. The axial movement of the movable platen is controlled to change the multi-mode stepless shifting mechanism from the normal mode to the fueling mode.

1‧‧‧Intake shaft

2‧‧‧ drive panel

21‧‧‧ drive disk

22‧‧‧Sliding drive

23‧‧‧No moving plate

231‧‧‧ slotting

24‧‧‧Drive components

25‧‧‧ movable platen

251‧‧‧protrusion

252‧‧‧Setting Department

3‧‧‧ drive panel

31‧‧‧ drive disk

32‧‧‧Sliding drive plate

33‧‧‧No moving plate

34‧‧‧Drive components

35‧‧‧ movable platen

351‧‧‧ protruding parts

352‧‧‧Setting Department

36‧‧‧stop block

37‧‧‧ Connecting rod

5‧‧‧Switching module

51‧‧‧Driven gears

511‧‧‧ internal thread

52‧‧‧ drive gear

53‧‧‧Motor

54‧‧‧ sleeve

541‧‧‧ External thread

61‧‧‧Throttle opening sensor

62‧‧‧ throttle position detector

621‧‧‧ switch

63‧‧‧Electronic Control Unit

65‧‧‧ throttle handle

71‧‧‧Ball bearings

72‧‧‧Ball bearings

1 is a system architecture diagram of a multi-mode stepless shifting mechanism control apparatus according to a preferred embodiment of the present invention.

2 is a flow chart of a multi-mode stepless shifting mechanism control apparatus in accordance with a preferred embodiment of the present invention.

3A is a schematic view showing the throttle handle of the multi-mode stepless shifting mechanism control device not rotating and switching according to a preferred embodiment of the present invention.

3B is a schematic view showing the throttle handle of the multi-mode stepless shifting mechanism control device rotated and the touch switch according to a preferred embodiment of the present invention.

Figure 4 is a cross-sectional view showing the multi-mode stepless shifting mechanism of the first preferred embodiment of the present invention.

Figure 5A is a plan view of a stationary platen of a first preferred embodiment of the present invention.

Fig. 5B is a schematic view showing the slot of the movable platen projection of the first preferred embodiment of the present invention without being inserted into the slot of the stationary platen.

Fig. 5C is a schematic view showing the slot of the movable platen projection inserted into the stationary platen according to the first preferred embodiment of the present invention.

Figure 6 is a cross-sectional view showing a multi-mode stepless shifting mechanism in accordance with a second preferred embodiment of the present invention.

FIG. 7A is a schematic view showing the four-bar linkage mechanism of the second preferred embodiment of the present invention in which the driving element of the mode 1 does not push the sliding driving disk.

FIG. 7B is a schematic diagram of the four-bar linkage mechanism of the second preferred embodiment of the present invention pushing the sliding drive disk in the mode of the driving element.

FIG. 8A is a schematic view showing the four-bar linkage mechanism of the second preferred embodiment of the present invention in which the driving element of the second mode does not push the sliding driving disk.

FIG. 8B is a schematic diagram of the four-bar linkage mechanism of the second preferred embodiment of the present invention pushing the sliding drive disk in the mode 2 driving element.

1 and FIG. 4 are respectively a system architecture diagram of a multi-mode stepless shifting mechanism control apparatus according to a preferred embodiment of the present invention, and a cross-sectional view of a multi-mode stepless shifting mechanism according to a first preferred embodiment of the present invention. The control device of the multi-mode stepless shifting mechanism of the embodiment is assembled on a locomotive having an engine, and the multi-mode stepless shifting mechanism comprises: an input shaft 1 and a driving disc group 2, the driving disc group 2 includes a driving plate 21, a sliding driving plate 22, a stationary pressing plate 23, a plurality of driving elements 24, and a movable pressing plate 25 having a plurality of protruding portions 251. The movable pressing plate 25 is disposed on the outer side of the stationary pressing plate 23, and is coaxially slidably disposed. On the input shaft 1 , the driving plate 21 and the stationary pressing plate 23 are coaxially fixed on the input shaft 1 , and the sliding driving plate 22 is located between the driving plate 21 and the fixed pressing plate 23 , and is coaxially slidably disposed on the input shaft 1 . When the input shaft 1 rotates, the plurality of driving elements 24 can be caused to rise with its centrifugal force. The sliding sliding drive plate 22 is axially slid along the input shaft 1 , and the fixed pressure plate 23 is provided with a plurality of slots 231 (shown in FIG. 5A ), and each of the protruding portions 251 can extend into each of the slots 231 . In the present embodiment, the drive element 24 is a ball.

The control device of the multi-mode stepless shifting mechanism includes: a switching module 5, an accelerator opening degree sensor 61, a throttle position detector 62, and an electronic control unit 63. The switching module 5 is connected to the movable pressing plate 25 of the multi-mode stepless shifting mechanism for controlling the axial movement of the movable pressing plate 25, and changing the axial position of the movable pressing plate 25 on the input shaft 1, the multi-mode has no segment The shifting mechanism is divided into a normal mode and a fueling mode according to the axial position of the movable platen 25; the throttle opening sensor 61 is configured to detect the throttle opening change rate of the locomotive, and the throttle position detector 62 is configured to detect the locomotive The throttle opening degree; the electronic control unit 63 is electrically connected to the switching module 5, the accelerator opening degree sensor 61, and the throttle position detector 62.

2 is a flow chart of a multi-mode stepless shifting mechanism control device according to a preferred embodiment of the present invention, and please refer to FIG. 1 and FIG. 4 together. The control principle of the multi-mode stepless shifting mechanism control device is when the engine is in the starting state and the multi-mode stepless shifting mechanism is in the normal mode, the throttle opening degree of change rate reaches a predetermined rate of change or the throttle opening degree reaches a predetermined opening degree, The switching module 5 is activated to control the axial movement of the movable platen 25 to change the multi-mode stepless shifting mechanism from the normal mode to the fueling mode.

In addition, when the engine is in the starting state and the multi-mode stepless shifting mechanism is in the fueling mode, the throttle opening degree change rate is less than a predetermined rate of change or the throttle opening degree is less than the predetermined opening degree, and the switching module is maintained for a predetermined time, the switching module 5 is started, controlling the axial movement of the movable platen 25 to make multi-mode The stepless shifting mechanism is changed from the fueling mode to the normal mode.

In the present embodiment, the predetermined rate of change is 180 degrees/second, and the predetermined opening degree is 90%, and the predetermined time is 5 seconds.

Please refer to FIG. 3A and FIG. 3B , which are respectively a schematic diagram of a throttle handle of a multi-mode stepless speed change mechanism control device according to a preferred embodiment of the present invention, which is not rotated and a switch diagram, and a throttle handle rotation and a touch switch, and are also referred to together. Figure 1 and Figure 4. In the present embodiment, the throttle position detector 62 is a switch 621 disposed on one of the throttle handles 65 of the locomotive. When the throttle handle 65 is rotated to open the throttle to 90%, the switch 621 is activated. The switching module 5 is caused to start, and the axial movement of the movable platen 25 is controlled to change the multi-mode stepless shifting mechanism from the normal mode to the fueling mode.

Please refer to FIG. 5A, FIG. 5B and FIG. 5C, which are respectively a plan view of the fixed pressure plate according to the first preferred embodiment of the present invention, a schematic view of the movable platen protruding portion being uninserted and inserted into the slot of the fixed pressure plate. The principle of the axial movement of the movable platen 25 is such that when the plurality of projections 251 of the movable platen 25 are correspondingly inserted into the plurality of slots 231 of the stationary platen 23, the track surface of the plurality of projections 251 of the movable platen 25 protrudes from the track of the stationary platen 23. Because the shape of the track surface of the projection plate 251 of the movable platen 23 and the movable platen 25 are different, the plurality of driving elements 24 are axially moved relative to each other along the track surface of the protruding portion 251 of the movable platen 25, and different axial positions. With different shift modes. In this embodiment, the movable platen 25 is set to have two axial positions, so that the two-stage shift mode, that is, the fueling mode and the normal mode are provided. When the protruding portion 251 of the movable platen 25 is not inserted into the slot 231 of the stationary platen 23, it is in the fueling mode, as shown in FIG. 5B; when the protruding portion 251 of the movable platen 25 is inserted into the slot 231 of the stationary platen 23 In time, it is in the general mode, as shown in Figure 5C.

In this embodiment, the switching module 5 includes: two ball bearings 71, 72, a driven gear 51 having an internal screw 511, a driving gear 52 meshing with the driven gear 51, and a driving A motor 53 to which the gear 52 is coupled and a sleeve 54 having an external thread 541. The sleeve 54 is sleeved on the set portion 252 of the movable platen 25, and the sleeve 54 is screwed to the inner thread 511 of the driven gear 51 by the outer screw 541.

Further, the ball bearing 72 is sleeved on the sleeve portion 252 of the movable platen 25 and abuts against the inner annular surface of the sleeve 54, so that the sleeve 54 does not rotate together with the movable platen 25. Further, the ball bearing 71 is sleeved on the input shaft 1 so as to be adjacent to the inner ring surface of the driven gear 51, so that the driven gear 51 does not rotate together with the input shaft 1.

The operating principle of the switching module 5 of the present embodiment is that the driving gear 52 is rotated by the motor 53 to drive the driven gear 51 to rotate. The driven gear 51 is screwed to the outside of the sleeve 54 by the internal thread 511. 541, and the driven gear 52 is fixed in the axial direction. When the driven gear 51 rotates, the inner screw 511 and the outer screw 541 can act to drive the sleeve 54 to axially displace, so that the sleeve is displaced. The movement of 54 can drive the movable platen 25 to be displaced in the axial direction.

In this embodiment, by using the throttle opening sensor 61 to detect the throttle opening change rate of the locomotive or the throttle position detector 62 detecting the throttle opening position of the locomotive, the movable platen 25 of the multi-mode stepless shifting mechanism can be automatically changed. The axial position, in turn, allows the multi-mode stepless shifting mechanism to be varied between the normal mode and the fueling mode to accommodate different road conditions. And because of switching The motor 53 of the module 5 provides thrust to directly control the axial movement of the movable platen 25. Compared with the conventional direct application of the sliding drive disk, the thrust required in this embodiment is small, that is, the horsepower required for the motor is small. Therefore, the motor can be miniaturized, and its space and weight are small, and the overall design of the locomotive can save space and weight.

6 is a cross-sectional view of a multi-mode stepless shifting mechanism according to a second preferred embodiment of the present invention. The present embodiment is identical to the control device and the switching module 5 of the first embodiment. The multi-mode stepless shifting mechanism of the present embodiment adopts a four-bar linkage mechanism, that is, the multi-mode stepless shifting mechanism of the embodiment is also assembled on a locomotive, including: an input shaft 1. A drive panel 3, a switching module 5 and two ball bearings 71, 72. The drive plate set 3 includes a drive plate 31, a slide drive plate 32, a stationary platen 33, a movable platen 35, a plurality of stop blocks 36, a plurality of links 37, and a plurality of drive elements 34.

The drive plate 31 and the stationary platen 33 are coaxially fixed to the input shaft 1. The slide drive plate 32 is located between the drive plate 31 and the fixed platen 33, and is coaxially slidably disposed on the input shaft 1, and the plurality of drive elements 34 are disposed on Between the sliding drive plate 32 and the stationary platen 33.

The movable platen 33 is provided with a plurality of openings (not shown). The movable platen 35 has a plurality of protruding portions 351. The movable platen 35 is disposed on the outer side of the stationary platen 33 and is coaxially slidably disposed on the input shaft 1 and each of the movable platens 35. A protruding portion 351 correspondingly extends into each of the openings of the stationary platen 33, and a front end of each of the protruding portions 351 is connected to a blocking block 36. The plurality of driving elements 34 are disposed on the sliding driving plate 32 and the plurality of blocking blocks. Between 36, each stop block 36 The connecting rod 5 can be connected to the switching plate 5 by a connecting rod 37, and the movable pressing plate 35 is connected to the switching module 5, so that the switching module 5 can control the axial movement of the movable pressing plate 35, thereby changing the axial position of the movable pressing plate 35.

The operation principle of the four-bar linkage mechanism of the present embodiment is that the two ends of the blocking block 36 are respectively pivotally connected to the protruding portion 351 of the movable platen 35 and the connecting rod 37. In addition, the two ends of the connecting rod 37 are respectively pivotally connected to the stopping block 36 and the fixed pressure plate 33. Therefore, the blocking block 36, the connecting rod 37, the fixed pressing plate 33 and the movable pressing plate 35 are pivotally connected to each other to form a four-bar linkage mechanism, and only the movable pressing plate 35 can be axially slid by the control of the switching module 5, thereby further The position and angle of contact between the stop block 36 and the drive element 34 are variable.

The switching module 5 of the embodiment includes: a driven gear 51 having an internal thread 511, a driving gear 52 meshing with the driven gear 51, a motor 53 connected to the driving gear 52, and a A sleeve 54 of an external thread 541. Further, the ball bearing 72 is sleeved on the sleeve portion 352 of the movable platen 35 and abuts against the inner annular surface of the sleeve 54 so that the sleeve 54 does not rotate together with the movable platen 35. In addition, the ball bearing 71 is sleeved on the input shaft 1 and is adjacent to the inner ring surface of the driven gear 51, so that the driven gear 51 can not rotate together with the input shaft 1, and the connection relationship and actuation of the switching module 5 of the embodiment The principle is exactly the same as the first embodiment.

Please refer to FIG. 7A and FIG. 7B , which are schematic diagrams of the four-bar linkage mechanism of the present invention, which are not pushed and pushed by the driving component of the mode one. The action mode is as follows: the motor 53 of the switching module 5 controls the sliding of the sleeve 54 to drive the movable pressing plate 35 to be displaced in the axial direction. When the movable pressing plate 35 slides to the position, the blocking block 36 is driven by vertical pushing. Element 34, At this time, it is indicated that the plurality of driving elements 34 can have a small centrifugal force, that is, the sliding driving disk 32 can be axially slid along the input shaft 1 .

Please refer to FIG. 8A and FIG. 8B , which are schematic diagrams of the four-bar linkage mechanism of the fourth embodiment of the present invention, which are not pushed and pushed by the driving component of the second mode. When the movable platen 35 is slid to such a position that the blocking block 36 is inclined to push the driving element 34, it is indicated that the plurality of driving elements 34 need to use a large centrifugal force, so as to push the sliding driving plate 32 along the input shaft 1 Axial sliding. When the mode 2 is compared with the mode 1, it can be known that only the axial position of the movable platen 35 needs to be changed, and the multi-step shift mode can be achieved.

For example, the first embodiment can automatically change the multi-mode without segment by using the throttle opening sensor 61 to detect the throttle opening change rate of the locomotive or the throttle position detector 62 detecting the throttle opening position of the locomotive. The axial position of the movable platen 35 of the shifting mechanism, in turn, allows the multi-mode, stepless shifting mechanism to be varied between the normal mode and the fueling mode to accommodate different road conditions. Moreover, since the motor 53 of the switching module 5 provides the thrust to directly control the axial movement of the movable platen 35, the thrust required in this embodiment is small, that is, the motor is required, as compared with the conventional direct application of the sliding drive disk. The horsepower is small, so the motor can be miniaturized, and its space and weight are small. The overall design of the locomotive can save space and weight.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

5‧‧‧Switching module

61‧‧‧Throttle opening sensor

62‧‧‧ throttle position detector

63‧‧‧Electronic Control Unit

Claims (9)

A control device for a multi-mode stepless shifting mechanism is assembled on a locomotive having an engine, the multi-mode stepless shifting mechanism comprising: an input shaft and a drive disc set, the drive disc set including a drive disc a sliding driving plate, a stationary pressing plate, a plurality of driving elements, and a movable pressing plate having a plurality of protruding portions, the movable pressing plate is disposed on an outer side of the stationary pressing plate, and is coaxially slidably disposed on the input shaft, the driving plate and the driving plate The non-moving plate is coaxially fixed on the input shaft, and the sliding driving plate is located between the driving plate and the non-moving plate, and is coaxially slidably disposed on the input shaft. When the input shaft rotates, the plural driving can be promoted. The component is axially slid with the centrifugal force thereof, and the sliding driving disc is axially slid along the input shaft. The stationary pressing plate is provided with a plurality of slots, and each of the protruding portions can extend into each of the slots, and each of the protrusions The front end of the outlet is connected to a stop block, and each of the stop blocks is connected to the fixed pressure plate by a connecting rod, and the two ends of the stop block are respectively pivotally connected with the protruding portion and the connecting rod, The two ends of the connecting rod The control device comprises: a switching module connected to the movable pressing plate for controlling the axial movement of the movable pressing plate, the multi-mode stepless shifting mechanism According to the axial position of the movable platen, it is divided into a normal mode and a fueling mode; a throttle opening sensor for detecting a throttle opening change rate of the locomotive; and a throttle position detector for detecting the locomotive a throttle opening; and an electronic control unit electrically connected to the switching module, the accelerator opening sensor, and the throttle position detector; wherein, when the engine is in an active state and the multi-mode stepless shifting mechanism is located In the normal mode, the throttle opening change rate reaches a predetermined rate of change or the throttle When the opening degree reaches a predetermined opening degree, the switching module controls the axial movement of the movable pressing plate to change the multi-mode stepless speed changing mechanism from the normal mode to the fueling mode. The control device of the multi-mode stepless shifting mechanism according to claim 1, wherein the predetermined rate of change is 180 degrees/second, and the predetermined opening degree is 90%. The control device of the multi-mode stepless shifting mechanism according to claim 1, wherein when the engine is in a starting state and the multi-mode stepless shifting mechanism is in a fueling mode, the throttle opening change rate is less than the predetermined change. When the rate or the accelerator opening is less than the predetermined opening degree and maintained for a predetermined time, the switching module controls the axial movement of the movable platen to change the multi-mode stepless speed change mechanism from the fueling mode to the normal mode. The control device of the multi-mode stepless shifting mechanism according to claim 3, wherein the predetermined time is 5 seconds. The control device of the multi-mode stepless shifting mechanism according to claim 1, wherein the switching module comprises a driven gear having an internal thread, a driving gear meshing with the driven gear, and a driving gear a motor connected to the driving gear and a sleeve having an external thread, the sleeve is sleeved on the set of the movable pressing plate, and the sleeve is screwed to the outer screw The internal thread of the driven gear. The control device of the multi-mode stepless shifting mechanism according to claim 5, wherein the switching module further comprises a ball bearing sleeve disposed on the sleeve of the movable pressure plate, and adjacent to the sleeve The inner annulus is such that the sleeve does not rotate with the movable platen. The control device of the multi-mode stepless shifting mechanism of claim 5, wherein the switching module further comprises a ball bearing sleeve disposed on the input shaft and adjacent to the inner ring surface of the driven gear, So that the driven gear does not rotate with the input shaft. The control device of the multi-mode stepless shifting mechanism according to claim 1, wherein the throttle position detector is a switch disposed on one of the throttle handles of the locomotive, and the throttle handle is rotated to cause the throttle When the opening degree reaches the predetermined opening degree, the switch is activated to cause the switching module to control the axial movement of the movable platen, so that the multi-mode stepless speed changing mechanism is changed from the normal mode to the fueling mode. The control device of the multi-mode stepless shifting mechanism according to claim 1, wherein the blocking block, the connecting rod, the fixed pressing plate and the movable pressing plate are pivotally connected to each other to form a four-bar linkage mechanism.