A control method, dual-drive transmission control system and road roller

Abstract

The present invention relates to the technical field of engineering machinery, and in particular to a control method, a dual-drive transmission control system and a road roller, wherein the dual-drive transmission control system comprises an engine; a front drive assembly, the front drive assembly being connected to the rotating shaft of the engine; a front wheel running mechanism; a rear drive assembly, the rear drive assembly being connected to the rotating shaft of the engine; a rear wheel running mechanism; a sensor assembly, the sensor assembly being used to collect the hydraulic pressure of the front drive assembly and the rear drive assembly, the rotation speed of the front wheel running mechanism and the rear wheel running mechanism, and the inclination angle of the whole vehicle relative to the horizontal plane; and a controller, the controller being electrically connected to the sensor assembly, and being electrically connected to both the front drive assembly and the rear drive assembly. The present invention can eliminate the parasitic power between the front and rear wheel running mechanisms, improve the power transmission efficiency of the whole vehicle, and extend the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a control method, a dual-drive transmission control system and a road roller. Background Art

[0002] At present, the travel system of commonly used road rollers consists of two parts: the front travel system and the rear travel system. The front travel system and the rear travel system are connected by a rigid frame and share the travel task. According to whether the travel system has a power drive function, it is divided into a single drive system and a dual drive system. The single drive system is generally rear wheel driven, and the front wheel follows. The dual drive system means that both the front and rear wheels are driving wheels.

[0003] The dual-drive travel system generally adopts a single-pump dual-motor parallel system. There is a problem with this system during use: when the load of one of the motors suddenly decreases, the pressure of the entire system will decrease accordingly, and the driving capacity of the entire vehicle will be greatly reduced. Therefore, the current single-pump dual-motor parallel system cannot meet the usage requirements well.

[0004] The roller driven independently by two pumps and two motors can provide greater driving capacity and stronger anti-skid ability, which can effectively meet the needs of vehicle use. However, there is another problem with this system: the independent front and rear drive systems cannot ensure the consistency of the speed of the front and rear drive systems. For this reason, a throttle valve is added between the front and rear hydraulic drive systems. When the power difference between the front and rear hydraulic drive systems is too large, the front and rear hydraulic drive systems will generate parasitic power through the throttle valve. Among them, parasitic power is also called circulating power. When the speeds of the front and rear hydraulic drive systems of the roller are inconsistent, the fast-speed travel system will drag the slow-speed system, causing the slow-speed travel system to be in a dragged state. The power generated by dragging between the front and rear travel systems is parasitic power. The existence of parasitic power affects the working efficiency of the roller's travel system and causes damage to the front and rear travel systems themselves.

[0005] Therefore, a control method, a dual-drive transmission control system and a roller are needed to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a control method, a dual-drive transmission control system and a road roller, which can eliminate the parasitic power between the front and rear wheel running mechanisms, improve the power transmission efficiency of the whole vehicle and extend the service life.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A control method comprises the following steps:

[0009] S1, the sensor component detects the hydraulic pressure of the front drive component and the rear drive component, the rotation speed of the front wheel running mechanism and the rear wheel running mechanism, and the inclination angle of the whole vehicle relative to the horizontal plane in real time, and feeds back the collected data to the controller;

[0010] S2, the controller determines whether the rotation speeds of the front wheel running mechanism and the rear wheel running mechanism are equal, and if they are equal, proceeds to the next step;

[0011] S3, the controller determines whether the hydraulic pressure P2 of the front drive assembly is lower than the first set value P1, and whether the hydraulic pressure P4 of the rear drive assembly is lower than the second set value P3. If both are not lower than the set values, the controller returns to step S1. If one of the two conditions is met, the controller executes the next step.

[0012] S4, calculating the pressure load rate n1 of the front drive assembly and the pressure load rate n2 of the rear drive assembly, wherein n1=P2 / P1; n2=P4 / P3;

[0013] S5. The controller obtains a corresponding set value m according to the inclination value of the whole vehicle, and adjusts the hydraulic pressure of the front drive component and / or the hydraulic pressure of the rear drive component so that n1 / n2=m; wherein m has a one-to-one correspondence with the inclination value of the whole vehicle.

[0014] Furthermore, in step S2, if the rotational speeds of the front wheel running mechanism and the rear wheel running mechanism are not equal, the rear drive assembly and / or the front drive assembly are controlled so that the rotational speeds of the front wheel running mechanism and the rear wheel running mechanism are equal.

[0015] A dual-drive transmission control system, which is controlled by the control method as described above, comprises:

[0016] engine;

[0017] A front drive assembly, the front drive assembly is drivingly connected to the rotating shaft of the engine;

[0018] A front wheel running mechanism, the front wheel running mechanism is drivingly connected to the front drive assembly;

[0019] A rear drive assembly, the rear drive assembly is drivingly connected to the rotating shaft of the engine;

[0020] A rear wheel running mechanism, the rear wheel running mechanism is drivingly connected to the rear drive assembly;

[0021] A sensor assembly, the sensor assembly is used to collect the hydraulic pressure of the front drive assembly and the rear drive assembly, the rotation speed of the front wheel running mechanism and the rear wheel running mechanism, and the inclination angle of the whole vehicle relative to the horizontal plane;

[0022] A controller is electrically connected to the sensor assembly and to both the front drive assembly and the rear drive assembly. The controller can coordinate and control the front drive assembly and the rear drive assembly according to data fed back by the sensor assembly, thereby eliminating parasitic power.

[0023] Furthermore, the front drive assembly includes a front drive pump and a front drive motor, the front drive pump is drivingly connected to the rotating shaft of the engine, the front drive motor is drivingly connected to the front drive pump, and the front drive pump is electrically connected to the controller.

[0024] Furthermore, the rear drive assembly includes a rear drive pump and a rear drive motor, the rear drive pump is transmission-connected to the rotating shaft of the engine, the rear drive motor is transmission-connected to the rear drive pump, and the rear drive pump is electrically connected to the controller.

[0025] Furthermore, the sensor assembly includes a first speed sensor and a second speed sensor, the first speed sensor is used to detect the rotation speed of the front wheel running mechanism, and the second speed sensor is used to detect the rotation speed of the rear wheel running mechanism.

[0026] Furthermore, the sensor assembly includes a first pressure sensor and a second pressure sensor, the first pressure sensor is used to detect the hydraulic pressure of the front drive assembly, and the second pressure sensor is used to detect the hydraulic pressure of the rear drive assembly.

[0027] Furthermore, the sensor assembly includes an inclination sensor, and the inclination sensor is used to detect the inclination of the whole vehicle relative to a horizontal plane.

[0028] Furthermore, it also includes a walking control handle, and the walking control handle is electrically connected to the controller.

[0029] A road roller comprises the dual-drive transmission control system as described above.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a dual-drive transmission control system, in which the engine drives the front wheel running mechanism and the rear wheel running mechanism respectively through the front drive assembly and the rear drive assembly, thereby realizing the movement of the entire roller, and the sensor assembly collects the hydraulic pressure of the front drive assembly and the rear drive assembly, the rotation speed of the front wheel running mechanism and the rear wheel running mechanism, and the inclination angle of the entire vehicle relative to the horizontal plane in real time, and the controller coordinates and controls the front drive assembly and the rear drive assembly through the data obtained from the sensor assembly, thereby eliminating parasitic power. By eliminating parasitic power, the power transmission efficiency of the entire vehicle can be improved and the service life of the entire machine can be extended.

[0032] A control method provided by the present invention comprises a sensor component which detects in real time the hydraulic pressure of a front drive component and a rear drive component, the rotation speed of a front wheel running mechanism and a rear wheel running mechanism, and the inclination angle of the whole vehicle relative to a horizontal plane, and feeds back the collected data to a controller, and the controller analyzes the data and coordinates the control of the front drive component and the rear drive component, thereby achieving the purpose of eliminating parasitic power.

[0033] A road roller provided by the present invention includes the dual-drive transmission control system as described above, which can eliminate parasitic power between the front and rear wheel traveling mechanisms, improve the power transmission efficiency of the entire vehicle, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of a dual-drive transmission control system of the present invention;

[0035] Figure 2 It is a flow chart of a control method of the present invention.

[0036] In the figure:

[0037] 1. Engine; 2. Front drive assembly; 21. Front drive pump; 22. Front drive motor; 3. Front wheel travel mechanism; 4. Rear drive assembly; 41. Rear drive pump; 42. Rear drive motor; 5. Rear wheel travel mechanism; 6. Controller; 61. First speed sensor; 62. Second speed sensor; 63. First pressure sensor; 64. Second pressure sensor; 65. Inclination sensor; 7. Travel control handle. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The roller driven by dual pumps and dual motors can provide greater driving capacity and stronger anti-skid ability, which can effectively meet the needs of vehicle use. However, there is another problem with this system: the independent front and rear drive systems cannot ensure the same speed of the front and rear drive systems.

[0042] In order to ensure the consistency of the front and rear wheel running mechanisms, and eliminate the parasitic power between the front and rear wheel running mechanisms, improve the power transmission efficiency of the vehicle and extend its service life. Figure 1 As shown, the present invention provides a dual-drive transmission control system. The dual-drive transmission control system comprises an engine 1, a front drive assembly 2, a front wheel running mechanism 3, a rear drive assembly 4, a rear wheel running mechanism 5, a controller 6 and a sensor assembly.

[0043] Among them, the front drive assembly 2 is connected to the rotating shaft of the engine 1; the front wheel running mechanism 3 is connected to the front drive assembly 2; the rear drive assembly 4 is connected to the rotating shaft of the engine 1; the rear wheel running mechanism 5 is connected to the rear drive assembly 4; the sensor assembly is used to collect the hydraulic pressure of the front drive assembly 2 and the rear drive assembly 4, the rotation speed of the front wheel running mechanism 3 and the rear wheel running mechanism 5, and the inclination angle of the whole vehicle relative to the horizontal plane; the controller 6 is electrically connected to the sensor assembly, and the controller 6 is electrically connected to the front drive assembly 2 and the rear drive assembly 4. The controller 6 can coordinate and control the front drive assembly 2 and the rear drive assembly 4 according to the data fed back by the sensor assembly, so as to eliminate parasitic power. In this embodiment, the controller 6 is a whole vehicle controller 6, and the whole vehicle controller 6 is a prior art, which will not be described in detail here.

[0044] Further, the front drive assembly 2 includes a front drive pump 21 and a front drive motor 22, the front drive pump 21 is connected to the rotating shaft of the engine 1, the front drive motor 22 is connected to the front drive pump 21, and the front drive pump 21 is electrically connected to the controller 6. The engine 1 drives the front drive pump 21 to rotate, thereby pumping hydraulic oil into the front drive motor 22, and the front drive motor 22 drives the front wheel walking mechanism 3 to move. In this embodiment, the front drive pump 21 is an electric proportional control hydraulic piston pump, and the front drive pump 21 is integrated with an electric proportional valve. When working, the displacement of the front drive pump 21 is controlled by the current of the solenoid valve; the front drive motor 22 is a fixed motor. The controller 6 can control the displacement of the front drive pump 21 by controlling the electric proportional valve on the front drive pump 21, so as to adjust the speed of the front drive motor 22. In other embodiments, the front drive motor 22 can also adopt an electronically controlled variable motor, the front drive motor 22 is electrically connected to the controller 6, and the controller 6 can control the speed of the front drive motor 22. In the above manner, the control strategy can be further enriched.

[0045] Further, the rear drive assembly 4 includes a rear drive pump 41 and a rear drive motor 42, the rear drive pump 41 is connected to the rotating shaft of the engine 1, the rear drive motor 42 is connected to the rear drive pump 41, and the rear drive pump 41 is electrically connected to the controller 6. The engine 1 drives the rear drive pump 41 to rotate, thereby pumping hydraulic oil into the rear drive motor 42, and the rear drive motor 42 drives the rear wheel walking mechanism 5 to move. In this embodiment, the rear drive pump 41 is an electric proportional control hydraulic piston pump, and the rear drive pump 41 is integrated with an electric proportional valve. When working, the displacement of the rear drive pump 41 is controlled by the current of the solenoid valve; the rear drive motor 42 is a fixed motor. The controller 6 can control the displacement of the rear drive pump 41 by controlling the electric proportional valve on the rear drive pump 41, so as to adjust the speed of the rear drive motor 42. In other embodiments, the rear drive motor 42 can also adopt an electronically controlled variable motor, and the rear drive motor 42 is electrically connected to the controller 6, and the controller 6 can control the speed of the rear drive motor 42. In the above manner, the control strategy can be further enriched.

[0046] Furthermore, the sensor assembly includes a first speed sensor 61 and a second speed sensor 62, wherein the first speed sensor 61 is used to detect the rotation speed of the front wheel running mechanism 3, and the second speed sensor 62 is used to detect the rotation speed of the rear wheel running mechanism 5. In this embodiment, the first speed sensor 61 and the second speed sensor 62 are both Hall type rotation speed sensors to ensure acquisition accuracy; the first speed sensor 61 and the second speed sensor 62 are connected to the controller 6 via a signal line.

[0047] Further, the sensor assembly includes a first pressure sensor 63 and a second pressure sensor 64, the first pressure sensor 63 is used to detect the hydraulic pressure of the front drive assembly 2, and the second pressure sensor 64 is used to detect the hydraulic pressure of the rear drive assembly 4. Specifically, the first pressure sensor 63 and the second pressure sensor 64 are connected to the controller 6 through a signal line, and the controller 6 can collect pressure values.

[0048] Furthermore, the sensor assembly includes an inclination sensor 65, which is used to detect the inclination of the vehicle relative to the horizontal plane. Specifically, the inclination sensor 65 is installed in the middle of the vehicle body to detect the inclination angle α in the driving direction of the roller, which can reflect the change in the center of gravity position of the vehicle, and then infer the gravity borne by the front and rear steel wheels. The inclination sensor 65 is connected to the controller 6 through a signal line.

[0049] Furthermore, the dual-drive transmission control system also includes a travel control handle 7, which is electrically connected to the controller 6. The travel control handle 7 is used to collect the driver's operating intentions, has a friction positioning function, can be fixed at any position, and its output signal size remains unchanged after being fixed. The output signal size of the travel control handle 7 is proportional to the angle of its deviation from the median position. The travel control handle 7 controls the front drive assembly 2 and the rear drive assembly 4 through the controller 6, thereby controlling the movement of the entire machine. The control current of the front drive assembly 2 and the rear drive assembly 4 is proportional to the size of the handle output signal.

[0050] During the actual operation of the press, since the volume ratio of the hydraulic system under different pressures is constantly changing and there are processing errors in the mechanical structure (such as wheel diameter), the theoretically calculated current cannot fully guarantee the consistency of the front and rear wheel speeds. If the front and rear wheel speeds are inconsistent, there are the following situations: the front wheel speed is greater than the rear wheel speed, and the front wheel speed is less than the rear wheel speed; when the front wheel speed is greater than the rear wheel speed, the front wheel drags the rear wheel, or the front wheel speed is less than the rear wheel speed, and the rear wheel pushes the front wheel. Coordinated control by the controller 6 can achieve consistency in the front and rear wheel speeds, thereby eliminating parasitic power and improving the power transmission efficiency of the entire vehicle.

[0051] like Figure 2 As shown, this embodiment also provides a control method for controlling the dual-drive transmission control system as above, comprising the following steps:

[0052] S1, the sensor component detects the hydraulic pressure of the front drive component 2 and the rear drive component 4, the rotation speed of the front wheel running mechanism 3 and the rear wheel running mechanism 5, and the inclination angle of the whole vehicle relative to the horizontal plane in real time, and feeds back the collected data to the controller 6;

[0053] S2, the controller 6 determines whether the rotation speeds of the front wheel running mechanism 3 and the rear wheel running mechanism 5 are equal, if they are equal, proceed to the next step;

[0054] S3. The controller 6 determines whether the hydraulic pressure P2 of the front drive assembly 2 is lower than the first set value P1 and whether the hydraulic pressure P4 of the rear drive assembly 4 is lower than the second set value P3. If neither is lower than the set value, it returns to step S1. If one of them is satisfied, it proceeds to the next step. The first set value P1 is the working set pressure of the front drive assembly 2, and the second set value P2 is the working set pressure of the rear drive assembly 4.

[0055] S4. Calculate the pressure load ratio n1 of the front drive assembly 2 and the pressure load ratio n2 of the rear drive assembly 4, where n1 = P2 / P1; n2 = P4 / P3.

[0056] S5. The controller 6 obtains the corresponding set value m based on the inclination value of the whole vehicle, and adjusts the hydraulic pressure of the front drive assembly 2 and / or the hydraulic pressure of the rear drive assembly 4 so that n1 / n2 = m. m has a one-to-one correspondence with the inclination value of the whole vehicle.

[0057] Specifically, when the roller is moving on a road surface with a slope, due to the shift of the center of gravity of the whole roller vehicle, the distributed gravity of the front and rear wheels will be affected, which will in turn affect the required driving force and required driving power of the front and rear wheels, and ultimately affect the pressure load ratios of the front drive assembly 2 and the rear drive assembly 4. m is the ratio of the pressure load ratio of the front drive assembly 2 to the pressure load ratio of the rear drive assembly 4, and this ratio has a one-to-one correspondence with the road surface slope α, and this correspondence can be reflected by an enumeration array in the program.

[0058] If n1 / n2 > m, it indicates that the front wheel load ratio is higher than the normal value, and it can be inferred that the front wheel is dragging the rear wheel. At this time, the speed of the front wheel should be reduced by reducing the flow rate of the front drive pump to avoid the front wheel dragging the rear wheel. Of course, the speed of the rear wheel can also be increased, or the speeds of the front and rear wheels can be coordinated and controlled.

[0059] If n1 / n2 < m, it indicates that the front wheel load ratio is lower than the normal value, and it can be inferred that the rear wheel is pushing the front wheel. At this time, the speed of the rear wheel should be reduced by reducing the flow rate of the rear drive pump to avoid the rear wheel dragging the front wheel. Of course, the flow rate of the front drive pump can also be increased to increase the speed of the front wheel.

[0060] If n1 / n2 = m, it means that the load ratio of the front wheel is appropriate to the load ratio of the rear wheel, and there is no parasitic power between the front and rear wheels.

[0061] Furthermore, in step S2, if the rotational speeds of the front wheel traveling mechanism 3 and the rear wheel traveling mechanism 5 are not equal, the rear drive assembly 4 and / or the front drive assembly 2 are controlled so that the rotational speeds of the front wheel traveling mechanism 3 and the rear wheel traveling mechanism 5 are equal.

[0062] Specifically, if the rotational speeds R1 of the front-wheel traveling mechanism 3 and R2 of the rear-wheel traveling mechanism 5 are not equal, it indicates a difference in the speeds of the front and rear wheels, and it is necessary to further determine whether the front wheel is faster or the rear wheel is faster. If R1 > R2, it means the front wheel is faster, and then it is necessary to reduce the front-wheel drive current according to the set slope to decrease the front-wheel speed until the speeds of the front and rear wheels are the same; if R1 < R2, then it is necessary to reduce the rear-wheel drive current according to the set slope to decrease the rear-wheel speed until the speeds of the front and rear wheels are the same; in this embodiment, the current change rate within one cycle (20 ms) is set to 5 mA to prevent overshoot caused by too rapid current change resulting in excessive current reduction. In other embodiments, it is also possible to increase the speed of the slower wheel, or coordinately control the front and rear wheels so that the faster wheel slows down and the slower wheel speeds up, thereby achieving the effect of the same rotational speeds of the front and rear wheels, and no further limitation is made here.

[0063] This embodiment also provides a road roller, including the above dual-drive transmission control system, which can eliminate the parasitic power between the front and rear wheel traveling mechanisms, improve the power transmission efficiency of the whole vehicle, and extend the service life.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A control method, characterized in that: The steps include: S1, the sensor component detects in real time the hydraulic pressure of the front drive component (2) and the rear drive component (4), the rotation speed of the front wheel running mechanism (3) and the rear wheel running mechanism (5), and the inclination angle of the whole vehicle relative to the horizontal plane, and feeds back the collected data to the controller (6); S2, the controller (6) determines whether the rotation speeds of the front wheel running mechanism (3) and the rear wheel running mechanism (5) are equal, and if they are equal, proceeds to the next step; S3, the controller (6) determines whether the hydraulic pressure P2 of the front drive assembly (2) is lower than the first set value P1, and whether the hydraulic pressure P4 of the rear drive assembly (4) is lower than the second set value P3. If both are not lower than the set values, the controller returns to step S1. If one of the two conditions is satisfied, the controller executes the next step. S4, calculating the pressure load rate n1 of the front drive assembly (2) and the pressure load rate n2 of the rear drive assembly (4), wherein n1 = P2 / P1; n2 = P4 / P3; S5. The controller (6) obtains a corresponding set value m according to the inclination value of the whole vehicle, and adjusts the hydraulic pressure of the front drive component (2) and / or the hydraulic pressure of the rear drive component (4) so ​​that n1 / n2=m; wherein m has a one-to-one correspondence with the inclination value of the whole vehicle.

2. A control method according to claim 1, characterized in that: In step S2, if the rotational speeds of the front wheel running mechanism (3) and the rear wheel running mechanism (5) are not equal, the rear drive assembly (4) and / or the front drive assembly (2) are controlled so that the rotational speeds of the front wheel running mechanism (3) and the rear wheel running mechanism (5) are equal.

3. A dual-drive transmission control system, characterized in that: The control method according to any one of claims 1 to 2 is used for control, including: Engine (1); A front drive assembly (2), the front drive assembly (2) being drivingly connected to a rotating shaft of the engine (1); A front wheel running mechanism (3), the front wheel running mechanism (3) being drivingly connected to the front drive assembly (2); A rear drive assembly (4), the rear drive assembly (4) being drivingly connected to the rotating shaft of the engine (1); A rear wheel running mechanism (5), the rear wheel running mechanism (5) being drivingly connected to the rear drive assembly (4); A sensor assembly, the sensor assembly being used to collect the hydraulic pressure of the front drive assembly (2) and the rear drive assembly (4), the rotation speed of the front wheel running mechanism (3) and the rear wheel running mechanism (5), and the inclination angle of the whole vehicle relative to a horizontal plane; A controller (6), wherein the controller (6) is electrically connected to the sensor component and is electrically connected to both the front drive component (2) and the rear drive component (4).

4. A dual-drive transmission control system according to claim 3, characterized in that: The front drive assembly (2) comprises a front drive pump (21) and a front drive motor (22); the front drive pump (21) is drivingly connected to the rotating shaft of the engine (1); the front drive motor (22) is drivingly connected to the front drive pump (21); and the front drive pump (21) is electrically connected to the controller (6).

5. A dual-drive transmission control system according to claim 3, characterized in that: The rear drive assembly (4) comprises a rear drive pump (41) and a rear drive motor (42); the rear drive pump (41) is transmission-connected to the rotating shaft of the engine (1); the rear drive motor (42) is transmission-connected to the rear drive pump (41); and the rear drive pump (41) is electrically connected to the controller (6).

6. A dual-drive transmission control system according to claim 3, characterized in that: The sensor assembly comprises a first speed sensor (61) and a second speed sensor (62), wherein the first speed sensor (61) is used to detect the rotation speed of the front wheel running mechanism (3), and the second speed sensor (62) is used to detect the rotation speed of the rear wheel running mechanism (5).

7. A dual-drive transmission control system according to claim 3, characterized in that: The sensor assembly comprises a first pressure sensor (63) and a second pressure sensor (64), wherein the first pressure sensor (63) is used to detect the hydraulic pressure of the front drive assembly (2), and the second pressure sensor (64) is used to detect the hydraulic pressure of the rear drive assembly (4).

8. A dual-drive transmission control system according to claim 3, characterized in that: The sensor assembly comprises an inclination sensor (65), and the inclination sensor (65) is used to detect the inclination of the whole vehicle relative to a horizontal plane.

9. A dual-drive transmission control system according to claim 3, characterized in that: It also includes a walking control handle (7), and the walking control handle (7) is electrically connected to the controller (6).

10. A road roller, characterized in that: Comprising a dual-drive transmission control system as described in any one of claims 3-9.

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