CN214616704U - Variable lift mechanism for valve of methanol engine - Google Patents
Variable lift mechanism for valve of methanol engine Download PDFInfo
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- CN214616704U CN214616704U CN202022727890.XU CN202022727890U CN214616704U CN 214616704 U CN214616704 U CN 214616704U CN 202022727890 U CN202022727890 U CN 202022727890U CN 214616704 U CN214616704 U CN 214616704U
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Abstract
The utility model discloses a variable lift mechanism of methyl alcohol engine valve. The utility model comprises an oil supply set, a tappet piston set and a valve piston set which are connected by oil pipes; the tappet piston group comprises a cam, the cam is movably connected with the tail end of the tappet piston, the tail end of the tappet piston is connected with a return spring, the return spring is connected with a cavity of a tappet piston cavity, the head end of the tappet piston is arranged in the tappet piston cavity, and the tappet piston cavity is connected with a first oil pipe. The utility model has the advantages of can adjust the valve lift of advancing and exhausting according to the advancing exhaust demand of methyl alcohol engine under different work condition, still can the energy saving when satisfying the automobile power demand.
Description
Technical Field
The utility model relates to a methyl alcohol engine technical field, especially a variable lift mechanism of methyl alcohol engine valve.
Background
The methanol is used as a renewable fuel and has good prospect in the development of new energy automobiles. At present, most of methanol engines are formed by reforming traditional engines, and the air inlet valve and the air outlet valve of the methanol engine still adopt a mechanical camshaft structure, and the valve lift cannot be changed. The valve lift is a compromise scheme selected according to the air inlet and exhaust requirements of the engine under various working conditions.
Since the calorific value of methanol fuel is much lower than that of gasoline, methanol engines require more fuel to do the same work externally than conventional engines. Therefore, the fixed-lift intake and exhaust valves of the methanol engine modified by the traditional engine cannot meet the requirements of various working conditions of the methanol engine.
Disclosure of Invention
An object of the utility model is to provide a variable lift mechanism of methyl alcohol engine valve, the utility model has the advantages of can adjust the valve lift of advancing and exhausting according to the advancing exhaust demand of methyl alcohol engine under different work condition, still can the energy saving when satisfying the automobile power demand.
The technical scheme of the utility model: a variable lift mechanism of a methanol engine valve comprises an oil supply set, a tappet piston set and a valve piston set which are connected through oil pipes; the tappet piston group comprises a cam, the cam is movably connected with the tail end of the tappet piston, the tail end of the tappet piston is connected with a return spring, the return spring is connected with a cavity of a tappet piston cavity, the head end of the tappet piston is arranged in the tappet piston cavity, and the tappet piston cavity is connected with a first oil pipe.
In the variable lift mechanism of the valve of the methanol engine, the oil supply set comprises an oil tank, and the oil tank is connected with an oil pipe II and an oil pipe III; the oil pipe II is provided with an oil supply one-way valve and an oil supply pump, and the oil supply pump is arranged between the oil tank and the oil supply one-way valve; and an overflow valve is arranged on the oil pipe III.
In the variable lift mechanism of the methanol engine valve, the valve piston group comprises a valve piston, the valve piston comprises a valve piston head, the tail end of the valve piston head is connected with a vertical rod of a T-shaped valve piston base, the vertical rod of the valve piston base is connected with a valve spring base, a valve spring is sleeved on the vertical rod of the valve piston base, one end of the valve spring is connected with the valve spring base, and the other end of the valve spring is connected with the tail end of the valve piston head; the head end of the valve piston head is arranged in a valve piston cavity, the valve piston cavity is connected with an oil pipe five and an oil pipe six, the oil pipe five is provided with an oil inlet one-way valve, and the oil pipe six is provided with an oil return one-way valve; the oil pipe five and the oil pipe six are connected with an oil pipe seven, a throttle valve is arranged on the oil pipe seven, one end of the oil pipe seven, which is provided with the throttle valve, is connected with an oil tank, and the other end of the oil pipe seven is connected with the oil pipe one, the oil pipe two and the oil pipe three.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a hydraulic mechanism replaces traditional mechanical type transmission structure, can change engine valve lift through this mechanism to the realization changes the air admission and exhaust volume under different work condition, still can the energy saving's advantage when satisfying the automobile power demand.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figures are: 1-cam, 2-tappet piston, 3-tappet piston cavity, 4-oil pipe, 5-oil supply one-way valve, 6-throttle valve, 7-oil inlet one-way valve, 8-oil return one-way valve, 9-valve piston cavity, 10-valve piston, 11-valve spring, 12-valve spring base, 13-oil tank, 14-overflow valve, 15-oil supply pump, 16-return spring, 41-oil pipe I, 42-oil pipe II, 43-oil pipe III, 44-oil pipe IV, 45-oil pipe V, 46-oil pipe VI, 47-oil pipe VII, 101-valve piston head, 102-valve piston base.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Examples are given. A methanol engine valve variable lift mechanism is shown in figure 1 and comprises an oil supply set, a tappet piston set and a valve piston set which are connected through an oil pipe 4; the tappet piston group comprises a cam 1, the cam 1 is movably connected with the tail end of a tappet piston 2, the tail end of the tappet piston 2 is connected with a return spring 16, the return spring 16 is connected with a cavity of a tappet piston cavity 3, the head end of the tappet piston 2 is arranged in the tappet piston cavity 3, and the tappet piston cavity 3 is connected with an oil pipe 41. Wherein, the oil pipe 4 is a general name of each section of oil pipe in the structure; the cam 1 is in rigid contact with the tappet piston 2, the return spring 16 is used for guaranteeing the contact state of the tappet piston and the tappet piston, an opening of the tappet piston cavity 3 is communicated with the first oil pipe 41, the cam 1 rotates and the return spring 16 jointly drive the tappet piston 2 to reciprocate in the tappet piston cavity 3, and therefore rising or falling of oil pressure inside the mechanism is achieved.
The oil supply set comprises an oil tank 13, and the oil tank 13 is connected with an oil pipe II 42 and an oil pipe III 43; the second oil pipe 42 is provided with an oil supply one-way valve 5 and an oil supply pump 15, and the oil supply pump 15 is arranged between the oil tank 13 and the oil supply one-way valve 5; and the overflow valve 14 is arranged on the oil pipe III 43. The oil supply pump 15 extracts hydraulic oil from the oil tank 13 through the oil pipe II 42 and supplies the hydraulic oil to the inside of the mechanism, the oil supply one-way valve 5 is connected with the oil supply pump 15 in series to ensure that the hydraulic oil flows in a one-way mode, when the pressure in the oil pipe 4 exceeds a set value, the overflow valve 14 is opened, and part of the hydraulic oil is discharged and flows back to the oil tank 13 through the oil pipe III 43.
The valve piston group comprises a valve piston 10, the valve piston 10 comprises a valve piston head 101, the tail end of the valve piston head 101 is connected with a vertical rod of a T-shaped valve piston base 102, the vertical rod of the valve piston base 102 is connected with a valve spring base 12, a valve spring 11 is sleeved on the vertical rod of the valve piston base 102, one end of the valve spring 11 is connected with the valve spring base 12, and the other end of the valve spring 11 is connected with the tail end of the valve piston head 101; the head end of the valve piston head 101 is arranged in the valve piston cavity 9, the valve piston cavity 9 is connected with an oil pipe five 45 and an oil pipe six 46, the oil pipe five 45 is provided with an oil inlet one-way valve 7, and the oil pipe six 46 is provided with an oil return one-way valve 8; the oil pipe five 45 and the oil pipe six 46 are connected with an oil pipe seven 47, the throttle valve 6 is arranged on the oil pipe seven 47, one end of the oil pipe seven 47, which is provided with the throttle valve 6, is connected with the oil tank 13, and the other end of the oil pipe seven 47 is connected with the oil pipe one 41, the oil pipe two 42 and the oil pipe three 43. The opening of the valve piston cavity 9 is communicated with a mechanism oil duct oil pipe five 45 and an oil pipe six 46, and the oil inlet check valve 7 and the oil return check valve 8 are respectively arranged on the oil inlet duct oil pipe six 46 and the oil outlet duct oil pipe five 45 of the valve piston cavity 9, so that the one-way flow of hydraulic oil is guaranteed. The valve piston 10 is pushed to move by the hydraulic oil pressure constructed by the tappet piston group, and the valve is opened. When the internal pressure of the mechanism is reduced, the valve is closed by the pressure matching with the valve spring 11. The maximum pressure inside the mechanism is changed by changing the opening of the throttle valve 6, thereby realizing the change of the lift of the valve piston 10.
The utility model discloses a use method and theory of operation:
the utility model discloses a user state includes that the valve opens and falls two stages back. And (3) valve opening stage: the cam 1 is located at the rising edge, the tappet piston 2 is separated from the base circle of the cam 1 and begins to rise, the internal hydraulic oil volume of the mechanism is compressed, the internal pressure of the mechanism rises, the valve piston 10 is pushed, the resistance of the valve spring 11 is overcome, the valve is opened, the valve lift is maximized when the internal pressure of the mechanism reaches the maximum, the maximum value of the internal pressure of the mechanism can be determined by adjusting the opening of the throttle valve 6, and therefore the maximum value of the valve lift is adjusted. And (3) valve falling stage: the cam 1 is at the falling edge, the tappet piston 2 begins to fall from the maximum displacement position, the internal pressure of the mechanism is gradually reduced, and the valve piston 10 begins to fall back under the action of the internal pressure of the mechanism and the valve spring 11.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (3)
1. The variable lift mechanism of the methanol engine valve is characterized in that: comprises an oil supply set, a tappet piston set and a valve piston set which are connected through an oil pipe (4); tappet piston assembly includes cam (1), the tail end swing joint of cam (1) and tappet piston (2), and return spring (16) are connected to the tail end of tappet piston (2), and the cavity of tappet piston chamber (3) is connected in return spring (16), and in tappet piston chamber (3) was located to the head end of tappet piston (2), oil pipe (41) were connected in tappet piston chamber (3).
2. The methanol engine valve variable lift mechanism according to claim 1, characterized in that: the oil supply set comprises an oil tank (13), and the oil tank (13) is connected with an oil pipe II (42) and an oil pipe III (43); the oil pipe II (42) is provided with an oil supply one-way valve (5) and an oil supply pump (15), and the oil supply pump (15) is arranged between the oil tank (13) and the oil supply one-way valve (5); and an overflow valve (14) is arranged on the oil pipe III (43).
3. The methanol engine valve variable lift mechanism according to claim 2, characterized in that: the valve piston group comprises a valve piston (10), the valve piston (10) comprises a valve piston head (101), the tail end of the valve piston head (101) is connected with a vertical rod of a T-shaped valve piston base (102), the vertical rod of the valve piston base (102) is connected with a valve spring base (12), a valve spring (11) is sleeved on the vertical rod of the valve piston base (102), one end of the valve spring (11) is connected with the valve spring base (12), and the other end of the valve spring (11) is connected with the tail end of the valve piston head (101); the head end of the valve piston head (101) is arranged in a valve piston cavity (9), the valve piston cavity (9) is connected with a fifth oil pipe (45) and a sixth oil pipe (46), the fifth oil pipe (45) is provided with an oil inlet one-way valve (7), and the sixth oil pipe (46) is provided with an oil return one-way valve (8); the oil pipe five (45) and the oil pipe six (46) are connected with the oil pipe seven (47), the throttle valve (6) is arranged on the oil pipe seven (47), one end of the oil pipe seven (47) provided with the throttle valve (6) is connected with the oil tank (13), and the other end of the oil pipe seven (47) is connected with the oil pipe one (41), the oil pipe two (42) and the oil pipe three (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727890.XU CN214616704U (en) | 2020-11-23 | 2020-11-23 | Variable lift mechanism for valve of methanol engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727890.XU CN214616704U (en) | 2020-11-23 | 2020-11-23 | Variable lift mechanism for valve of methanol engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214616704U true CN214616704U (en) | 2021-11-05 |
Family
ID=78427991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022727890.XU Active CN214616704U (en) | 2020-11-23 | 2020-11-23 | Variable lift mechanism for valve of methanol engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214616704U (en) |
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2020
- 2020-11-23 CN CN202022727890.XU patent/CN214616704U/en active Active
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