Hydraulic control device for CVT (continuously variable transmission) of motorcycle

Abstract

The utility model discloses a hydraulic control device for a CVT (continuously variable transmission) of a motorcycle, which belongs to the technical field of transmissions and comprises an oil pump and a main oil way, the main oil way is provided with a main regulating valve, and an oil filtering device is arranged between the main regulating valve and the oil pump. The oil filtering device comprises a mounting base body, a second filtering body filtering membrane, a first filtering body filtering membrane, a first filtering body and a second filtering body, and oil inlet channel branches on the main adjusting valve are connected with a first electromagnetic valve and a second electromagnetic valve respectively; the main regulating valve oil outlet channel branch is respectively connected with the first regulating valve oil inlet channel and the second regulating valve oil inlet channel, the first regulating valve oil outlet channel is connected with the input belt wheel shaft, and the second regulating valve oil outlet channel is connected with the output belt wheel shaft. According to the device, the control difficulty and complexity can be reduced, the arrangement space of the transmission is expanded, oil pressure can be stabilized, and protection on follow-up parts is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmissions, and in particular relates to a hydraulic control device for a motorcycle CVT transmission. Background Art

[0002] The existing motorcycle automatic transmissions include DCT transmissions and belt-type CVT transmissions. The belt-type CVT structure is limited by its transmission medium and cannot transmit large torque, so it cannot be used in large-displacement motorcycles. In order to meet market demand, the metal belt CVT came into being, and with it came the demand for a transmission hydraulic control system.

[0003] The invention patent with publication number US7029409B2 proposes a hydraulic system for a CVT transmission of a motor vehicle, which has an oil pump for delivering oil from an oil tank to a transmission, wherein the transmission comprises a first pulley set and a second pulley set. In each case, a valve mechanism is provided for controlling the pressure acting on the relevant pulley set. A pressure selection valve is provided between the valve mechanisms associated with each pulley set, and its position determines which of the valve mechanisms controls the main pressure delivered by the oil pump. With this hydraulic system, the pressure of the transmission can be reliably controlled in the simplest possible manner, and a geometrically favorable pulley ratio can be achieved.

[0004] However, in the hydraulic system of the existing CVT transmission, multiple valve mechanisms cooperate to control the pressure changes at the input pulley and the output pulley and the pressure changes at the main oil circuit, which increases the difficulty and complexity of control and increases the number of control chips of the automatic transmission control unit. In addition, since the transmission layout space of motorcycles is greatly reduced compared to passenger cars, the existing hydraulic control system solution has been difficult to meet the layout requirements of the transmission. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a hydraulic control device for a motorcycle CVT transmission, which can reduce the difficulty and complexity of control, expand the transmission layout space, stabilize the oil pressure, and enhance the protection of subsequent parts.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] A hydraulic control device for a motorcycle CVT transmission comprises an oil pump and a main oil circuit, wherein the main oil circuit is provided with a main regulating valve, an oil filter device is provided between the main regulating valve and the oil pump, an oil inlet channel branch on the main regulating valve is respectively connected to a first solenoid valve and a second solenoid valve, the pressure difference at the two oil inlet channels is judged by the main regulating valve to realize the magnitude of the output oil pressure of the main regulating valve, an oil outlet channel branch of the main regulating valve is respectively connected to the first regulating valve oil inlet channel and the second regulating valve oil inlet channel, the first regulating valve oil outlet channel is connected to an input pulley shaft, the second regulating valve oil outlet channel is connected to an output pulley shaft, the first solenoid valve controls the pressure at the input pulley shaft by controlling the output pressure of the first regulating valve, and the second solenoid valve controls the pressure at the output pulley shaft by controlling the output pressure of the second regulating valve.

[0008] According to an embodiment of the utility model, the oil filter device includes a mounting base, a second filter filter membrane, a first filter filter membrane, a first filter body, and a second filter body. The mounting base is a tubular structure with a middle through hole, which is used to mount the first filter body and the second filter body. The inner pore diameter of the lower part of the mounting base is smaller than the inner pore diameter of the upper part of the mounting base. This structure can clamp the second filter body so that the first filter body and the second filter body are not displaced by the impact force of the oil.

[0009] According to one embodiment of the utility model, the first filter body includes a first filter body filter membrane and an annular sheet body connected to the first filter membrane. The filter membrane of the first filter body is hemispherical. The annular sheet body on the first filter body can be placed on the second filter body so that the first filter body and the second filter body can be used in coordination with each other. The hemispherical filter membrane can increase the contact area between the filter membrane and the oil and increase the filtering efficiency.

[0010] According to one embodiment of the utility model, the second filter body includes a second filter body filter membrane and an internal hollow annular sheet body connected to the second filter body filter membrane, the side wall of the annular sheet body is provided with a transverse and longitudinal strip sheet body, the second filter body filter membrane is installed at the bottom of the annular sheet body, and the annular sheet body rests on the protruding part of the installation base. The transverse and longitudinal strip sheets can reinforce the second filter body, thereby increasing the structural strength of the second filter body.

[0011] Preferably, the main regulating valve is a self-operated regulating valve, and the oil pressure of the first solenoid valve and the second solenoid valve are simultaneously introduced into the main regulating valve. By comparing the force of the internal components of the self-operated regulating valve, it is determined whether the first solenoid valve or the second solenoid valve actually participates in controlling the main regulating valve.

[0012] Preferably, a clutch solenoid valve is included, which directly controls the clutch piston to achieve clutch engagement. The pressure of the pressure oil output from the clutch solenoid valve is linearly adjustable and can output different pressures according to the needs of the entire vehicle, thereby enabling the clutch to achieve optimal working state.

[0013] Preferably, the clutch solenoid valve is a normally low direct-acting solenoid valve, that is, when no power is supplied, the oil pressure output by the solenoid valve is substantially zero, so as to improve the safety of the entire vehicle and reduce the number of sliding valves, making it easier to disconnect the engine in limp mode, thereby ensuring driving safety while allowing the driver to easily push the motorcycle.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] A solenoid valve for controlling the main regulating valve alone is saved, which realizes the cost reduction demand. At the same time, the oil pressure of the main oil circuit can be automatically adjusted along with the adjustment changes of the oil pressure at the first regulating valve and the oil pressure at the second regulating valve, and the oil pressure of the main oil circuit is kept greater than or equal to the oil pressure at the first regulating valve, or the oil pressure of the main oil circuit is greater than or equal to the oil pressure at the second regulating valve. The present invention uses two solenoid valves to control three regulating valves, which saves one regulating valve and correspondingly saves the layout space of one regulating valve. Impurities in the oil can be filtered out by the oil filtering device, further protecting the normal operation of the equipment. The reduction in the number of solenoid valves also reduces the demand for layout space of the hydraulic system control module, satisfying the layout space of the motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the utility model scheme;

[0018] Figure 2 This is a cross-sectional schematic diagram of the oil filter device of the utility model;

[0019] Figure 3 It is a schematic diagram of the oil filtering device of the utility model.

[0020] Figure numbers: 1-oil pump; 2-main regulating valve; 3a-first solenoid valve; 3b-second solenoid valve; 4-output pulley shaft; 5-input pulley shaft; 6-second regulating valve; 7-first regulating valve, 8-flow control valve; 9-oil filtering device; 10-installation base; 11a-second filter body filter membrane; 11b-first filter body filter membrane; 12-first filter body; 13-second filter body. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] Embodiment 1:

[0024] The utility model provides a hydraulic control device for a motorcycle CVT transmission, comprising an oil pump 1 and a main oil circuit, wherein a main regulating valve 2 is provided in the main oil circuit, an oil filter 9 is provided between the main regulating valve 2 and the oil pump 1, an oil inlet channel branch on the main regulating valve 2 is respectively connected with a first solenoid valve 3a and a second solenoid valve 3b, the pressure difference at the two oil inlet channels is judged by the main regulating valve 2 to realize the magnitude of the output oil pressure of the main regulating valve 2, an oil outlet channel branch of the main regulating valve 2 is respectively connected with an oil inlet channel of a first regulating valve 7 and an oil inlet channel of a second regulating valve 6, the oil outlet channel of the first regulating valve 7 is connected with an input pulley shaft 5, the oil outlet channel of the second regulating valve 6 is connected with an output pulley shaft 4, the first solenoid valve 3a controls the pressure at the input pulley shaft 5 by controlling the output pressure of the first regulating valve 7, and the second solenoid valve 3b controls the pressure at the output pulley shaft 4 by controlling the output pressure of the second regulating valve 6.

[0025] The oil filter device 9 includes a mounting base 10, a second filter filter membrane 11a, a first filter filter membrane 11b, a first filter 12, and a second filter 13. The mounting base 10 is a tubular structure with a through hole in the middle, and is used to mount the first filter 12 and the second filter 13. The inner pore diameter of the lower part of the mounting base 10 is smaller than that of the upper part of the mounting base 10. This structure can clamp the second filter 13 so that the first filter 12 and the second filter 13 are not displaced by the impact force of the oil.

[0026] The first filter body 12 includes a first filter body filter membrane 11b and an annular sheet body connected to the first filter body filter membrane. The first filter body filter membrane 11b is hemispherical. The annular sheet body on the first filter body 12 can be placed on the second filter body 13 so that the first filter body 12 and the second filter body 13 can be used in coordination. The hemispherical filter membrane can increase the contact area between the filter membrane and the oil and increase the filtering efficiency.

[0027] The second filter body 13 includes a second filter body filter membrane 11a and an internal hollow annular sheet body connected to the second filter body filter membrane 11a. The side walls of the annular sheet body are provided with transverse and longitudinal strips. The second filter body filter membrane 11a is installed at the bottom of the annular sheet body. The annular sheet body is placed on the protruding part of the installation base 10. The transverse and longitudinal strips can reinforce the second filter body 13, thereby increasing the structural strength of the second filter body 13.

[0028] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the utility model, and are not intended to limit the implementation methods of the technology of the utility model in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the utility model, but they should still be regarded as technologies or embodiments that are essentially the same as the utility model.

[0029] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A hydraulic control device for a motorcycle CVT transmission, comprising an oil pump (1) and a main oil circuit, characterized in that: The main oil circuit is provided with a main regulating valve (2), an oil inlet channel branch and an oil outlet channel branch on the main regulating valve (2) are respectively connected to a solenoid valve and a regulating valve, the oil outlet channel of the regulating valve is respectively connected to an input pulley shaft (5) and an output pulley shaft (4), and an oil filter device (9) is provided between the main regulating valve (2) and the oil pump (1).

2. A hydraulic control device for a motorcycle CVT transmission according to claim 1, characterized in that: The solenoid valve comprises a first solenoid valve (3a) and a second solenoid valve (3b), wherein the first solenoid valve (3a) and the second solenoid valve (3b) are respectively connected to branches of an oil inlet channel on the main regulating valve (2).

3. A hydraulic control device for a motorcycle CVT transmission according to claim 1, characterized in that: The regulating valve comprises a first regulating valve (7) and a second regulating valve (6), wherein the first regulating valve (7) and the second regulating valve (6) are respectively connected to branches of an oil outlet channel of the main regulating valve (2).

4. A hydraulic control device for a motorcycle CVT transmission according to claim 3, characterized in that: The oil outlet passage of the first regulating valve (7) is connected to the input pulley shaft (5), and the oil outlet passage of the second regulating valve (6) is connected to the output pulley shaft (4).

5. The hydraulic control device for a motorcycle CVT transmission according to claim 1, characterized in that: The oil filtering device (9) comprises a mounting base (10), a second filter body filter membrane (11a), a first filter body filter membrane (11b), a first filter body (12) and a second filter body (13).

6. A hydraulic control device for a motorcycle CVT transmission according to claim 5, characterized in that: The mounting base (10) is a tubular structure with a central through hole, and the inner diameter of the lower part of the mounting base (10) is smaller than the inner diameter of the upper part of the mounting base (10).

7. A hydraulic control device for a motorcycle CVT transmission according to claim 5, characterized in that: The first filter body (12) comprises the first filter body filter membrane (11b) and an annular sheet connected to the first filter body filter membrane (11b); the first filter body filter membrane (11b) is hemispherical.

8. The hydraulic control device for a motorcycle CVT transmission according to claim 5, characterized in that: The second filter body (13) comprises the second filter body filter membrane (11a) and an internally hollow annular sheet body connected to the second filter body filter membrane (11a), and the side wall of the annular sheet body is provided with a transverse and longitudinal long strip sheet body.

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