TWI394887B - Engine valve control device - Google Patents

Description

Engine valve control device

The present invention relates to a control device, and more particularly to a control device for an engine valve.

The engine of a two-valve mechanism has an intake valve and an exhaust valve. Since the engine of the two-valve mechanism has only one intake valve, the area of the intake passage is small, resulting in low airflow of the intake air. The flow rate of the intake air becomes large, so that when the engine of the two-valve mechanism is running at a high speed, the high-speed running horsepower of the engine of the two-valve mechanism is poor because the intake air amount is insufficient.

Furthermore, there are generally engines for multi-valve mechanisms, such as one-to-two-row, two-in-one-row, or two-in-two-row, etc. The following conventional descriptions are described in a two-in-two-row four-valve mechanism. The engine has two intake valves and two exhaust valves. Since the number of intake passages of the engine of the four-valve mechanism is larger than that of the two-valve mechanism, more intake air flow can be introduced at high speed. The high-speed horsepower of the engine of the four-valve mechanism has better performance, but at low speeds, most of the intake valves will lower the flow rate of the intake airflow, thus resulting in poorer horsepower performance at low speeds.

Therefore, if the low-speed horsepower performance of the engine of the two-valve mechanism can be combined, the high-speed horsepower performance of the engine with the four-valve mechanism should overcome the above shortcomings and improve the performance of the engine operation, for example, Taiwan Bulletin No. I310804 "Valve Control" The invention patent case includes a first intake valve 10, a second intake valve 11, a first intake rocker arm 13, a second intake rocker arm 14, a first drive rocker arm 12, and a Second driving rocker arm 15, a first linkage The unit 18, and a second linkage unit 19, the first and second intake valves 10, 11 are used to open and close the intake port of the engine to control the amount of intake air.

By controlling the movement of the first linkage unit 18 and the second linkage unit 19, the first intake rocker arm 13 and the second intake rocker arm 14 can be simultaneously actuated or separately moved, and can be driven according to the engine height. The difference between the low speed and the first and second intake valves 10, 11 is to adjust the intake air amount and the intake air flow rate.

However, since the valve control mechanism controls the movement of the first and second intake valves 10, 11 by using two different members of the first and second linkage units 18, 19, the control member has more components, if the first The two interlocking units 18 and 19 are not working smoothly, and the engine cannot be operated smoothly.

Accordingly, it is an object of the present invention to provide a control device for an engine valve that is simple in construction and capable of improving operational efficiency.

Thus, the control device for the engine valve of the present invention comprises a cylinder head, an intake actuation unit, an exhaust actuation unit, a switching unit, and a drive unit.

The cylinder head includes a cylinder head body that is formed with an intake passage and an exhaust passage.

The intake actuation unit includes an intake rocker shaft disposed in the cylinder head body, a first intake valve disposed in the intake passage, a second intake valve disposed in the intake passage, and a second intake valve disposed in the intake passage. a first intake rocker arm disposed on the intake rocker shaft and interlocking the first intake valve, and a second intake rock disposed on the intake rocker shaft and interlocking the second intake valve arm.

The exhaust actuation unit includes an exhaust rocker shaft disposed in the cylinder head body, a first exhaust valve disposed in the exhaust passage, a second exhaust valve disposed in the exhaust passage, and a second exhaust valve a first exhaust rocker arm disposed on the exhaust rocker arm shaft and interlocking the first exhaust valve, and a second exhaust rocker disposed on the exhaust rocker arm shaft and interlocking the second exhaust valve arm.

The switching unit includes an intake switch disposed between the first intake rocker arm and the second intake rocker arm, and a first exhaust rocker arm and the second exhaust rocker arm disposed between the first intake rocker arm and the second exhaust rocker arm An exhaust switch, wherein the intake switch can control whether the first intake rocker arm interlocks with the second intake rocker arm, and the exhaust switcher can control whether the first exhaust rocker arm links the second exhaust Rocker arm.

The driving unit includes a cam shaft disposed on the cylinder head body, an intake cam disposed on the cam shaft, an exhaust cam disposed on the cam shaft, and a base plate disposed on the cam shaft. Wherein the first intake rocker arm abuts against the intake cam, the second intake rocker arm abuts against the base plate, and the first exhaust rocker arm abuts against the exhaust cam, the second exhaust The rocker arm rests against the base.

The utility model has the advantages that the first and second intake rocker arms can be operated simultaneously by the design of the air intake switch, or the first intake rocker arm can be operated separately, and the exhaust switch can also be operated. Controlling the action of the exhaust rocker arms, so that the engine valve can select one valve intake, one valve exhaust, or two valve intake and two valve exhaust, and can increase intake air flow at high speed, low speed Increase the flow rate of the intake air flow while driving, thereby optimizing the horsepower of the engine and improving the running efficiency.

The foregoing and other objects, features, and advantages of the invention are set forth in the <RTIgt;

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

As shown in FIGS. 2 and 3, a preferred embodiment of the control device for the engine valve of the present invention comprises a cylinder head 2, an intake actuation unit 3, an exhaust actuation unit 4, a switching unit 5, and a drive unit 6. .

The cylinder head 2 includes a cylinder head body 20 that is formed with an intake passage 21 and an exhaust passage 23.

As shown in FIGS. 2, 3 and 4, the intake actuation unit 3 includes an intake rocker shaft 31 disposed in the cylinder head body 20, and a first intake valve 32 disposed in the intake passage 21. a second intake valve 33 disposed in the intake passage 21, a first intake rocker arm 34 disposed on the intake rocker shaft 31 and interlocking the first intake valve 32, and a setting The second intake rocker arm 35 of the second intake valve 33 is interlocked on the intake rocker shaft 31.

The exhaust actuating unit 4 includes an exhaust rocker shaft 41 disposed in the cylinder head body 20, a first exhaust valve 42 disposed in the exhaust passage 23, and a first exhaust valve 42 disposed therein. a second exhaust valve 43 , a first exhaust rocker arm 44 disposed on the exhaust rocker shaft 41 and interlocking the first exhaust valve 42 , and a first exhaust valve arm 41 disposed on the exhaust rocker shaft 41 The second exhaust rocker arm 45 of the second exhaust valve 43 is interlocked.

As shown in FIG. 2, the switching unit 5 includes an intake switch 51 disposed between the first intake rocker arm 34 and the second intake rocker arm 35, and a first exhaust fan disposed thereon. An exhaust switch 52 between the arm 44 and the second exhaust rocker arm 45, wherein the intake switch 51 controls whether the first intake rocker arm 34 interlocks with the second intake rocker arm 35, the exhaust The switch 52 can control whether the first exhaust rocker arm 44 interlocks the second exhaust rocker arm 45.

As shown in FIGS. 2, 3 and 4, the driving unit 6 includes a cam shaft 61 disposed on the cylinder head body 20, an intake cam 62 disposed on the cam shaft 61, and a cam shaft 61 disposed thereon. An upper exhaust cam 63, and a base 64 disposed on the camshaft 61, wherein the first intake rocker arm 34 abuts against the intake cam 62, and the second intake rocker arm 35 abuts The base 64, the first exhaust rocker arm 44 abuts against the exhaust cam 63, and the second exhaust rocker arm 45 abuts against the base 64, wherein the base 64 is a circular disk.

As shown in FIG. 2, the first intake rocker arm 34 is formed with a first intake air gap 340, and the second air intake rocker arm 35 is formed with a second front facing the first air intake cutout 340. a gas sump 350 having a first intake member 511 disposed in the first intake sump 340, and a second intake sump 350 disposed with the first intake sump The second air intake member 512 is abutted together by the member 511.

The first exhaust rocker arm 44 is formed with a first exhaust notch 440, and the second exhaust rocker arm 45 is formed with a second exhaust notch 450 facing the first exhaust notch 440. The exhaust switch 52 has a first exhaust member 521 disposed on the first exhaust slot 440, and a second exhaust slot 450 disposed adjacent to the first exhaust member 521 The second venting member 522.

As shown in FIG. 5, the intake rocker shaft 31 is formed to communicate with the first feed. a first intake passage 301 of the vacant groove 340, and a second intake passage 302 that communicates with the second intake nip 350. Similarly, as shown in FIG. 7, the exhaust rocker shaft 41 is formed. There is a first exhaust oil passage 401 that communicates with the first exhaust cutout 440, and a second exhaust passage 402 that communicates with the second exhaust cutout 450.

With the above design, when the first intake oil passage 301 and the second exhaust oil passage 402 are filled with the oil body and are respectively injected into the first intake gap 340 and the second exhaust notch 450, FIG. 5 The second air intake member 512 is moved in the direction of the third arrow 73. The first exhaust member 521 of FIG. 7 is moved toward the first arrow 71. As shown in FIG. 6, the first air intake rocker arm 34 is The intake cam 62 is driven to operate, and the second intake rocker arm 35 is separated from the first intake rocker arm 34 without interlocking. Similarly, the exhaust cam 63 only drives the first row. The gas rocker arm 44 acts to form a single valve intake of the engine and a single valve exhaust.

When the second intake oil passage 302 and the first exhaust oil passage 401 are filled with the oil body and are respectively injected into the second intake air gap 350 and the first exhaust air gap 440, the first air intake member 511 of FIG. Moving toward the fourth arrow 74, the second exhaust member 522 of FIG. 7 moves in the direction of the second arrow 72, that is, as shown in FIG. 2, the first intake rocker arm 34 will interlock the second intake shake. The arm 35 moves synchronously, and the first exhaust rocker arm 44 also moves the second exhaust rocker arm 45 to form an engine double valve intake and double valve exhaust effect.

Therefore, by providing the intake switch 51 between the first and second intake rocker arms 34, 35, an exhaust switch 52 is disposed between the first and second exhaust rocker arms 44, 45, etc. The switches 51 and 52 have a simple structure, and the operation of the intake valve or the exhaust valve and the switching of the number of valves can be controlled by a single component, which is convenient for subsequent maintenance and maintenance.

In addition, the engine can control the flow rate of the intake air flow and the intake air flow rate by controlling the switches 51 and 52 by hydraulic pressure during high-speed and low-speed running, so that the engine and the four-valve of the conventional two-valve mechanism can be combined. The advantages of the engine of the organization to improve the horsepower and performance of the engine.

It is worth mentioning that, as shown in FIG. 2 and FIG. 5, the first intake rocker arm 34 has a first intake ramp portion 341 located in the first intake air cutout 340, and the second intake rocker arm 35 has a second intake ramp portion 351 located in the second intake slot 350. As shown in FIGS. 2 and 7, the first exhaust rocker arm 44 has a first exhaust slot 440. The first exhaust ramp portion 441 has a second exhaust ramp portion 451 located within the second exhaust cutout 450.

With the design of the first intake ramp portion 341 and the second intake ramp portion 351, the first and second air intake members 511, 512 can be prevented from being excessively attached to the first and second intake air respectively when moving. The wall surfaces of the rocker arms 34, 35 can reduce the difficulty of pushing the oil pressure in the first and second intake oil passages 301, 302, so that the first and second air intake members 511, 512 can be pushed smoothly, and the The fluency of the air intake switch 51 is similar. The design of the first and second exhaust ramps 441 and 451 can also facilitate the first and second exhaust members 521 and 522 to be lifted. The fluency of the operation of the gas switch 52.

In summary, the first and second intake rocker arms 34, 35 can be operated simultaneously by the design of the air intake switch 51, or the first intake rocker arm 34 can be operated separately, and the exhaust The switch 52 can also control the first and second exhaust rocker arms 44, 45 to operate simultaneously, or the first exhaust rocker arm 44 can be operated separately, so that the engine valve can select a valve intake air and a valve exhaust. Or the two valve intake and the second valve exhaust, and can increase the intake air flow rate when driving at a high speed, increase the flow rate of the intake air flow when driving at a low speed, and thereby optimize the horsepower of the engine, so the invention can be achieved. purpose.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Cylinder head

20. . . Cylinder head body

twenty one. . . Intake

twenty three. . . Exhaust passage

3. . . Intake actuating unit

31. . . Intake rocker shaft

301. . . First intake oil passage

302. . . Second intake oil passage

32. . . First intake valve

33. . . Second intake valve

34. . . First intake rocker

340. . . First intake slot

341. . . First intake ramp

35. . . Second intake rocker

350. . . Second intake slot

351. . . Second intake ramp

4. . . Exhaust actuation unit

41. . . Exhaust rocker shaft

401. . . First exhaust oil passage

402. . . Second exhaust oil passage

42. . . First exhaust valve

43. . . Second exhaust valve

44. . . First exhaust rocker

440. . . First exhaust slot

441. . . First exhaust ramp

45. . . Second exhaust rocker

450. . . Second exhaust slot

451. . . Second exhaust ramp

5. . . Switching unit

51. . . Intake switch

511. . . First air intake

512. . . Second air intake

52. . . Exhaust switch

521. . . First exhaust

522. . . Second exhaust

6. . . Drive unit

61. . . Camshaft

62. . . Intake cam

63. . . Exhaust cam

64. . . Base plate

71. . . First arrow

72. . . Second arrow

73. . . Third arrow

74. . . Fourth arrow

Figure 1 is a schematic view showing the invention patent of the "valve control mechanism" of Taiwan Bulletin No. I310804;

2 is a partial plan view showing a preferred embodiment of the control device for the engine valve of the present invention, and selecting the two valve intake and the second valve exhaust;

3 is a partial cross-sectional view, illustrating III-III of FIG. 2, for convenience of explaining the actions of the second intake rocker arm and the first exhaust rocker arm, omitting the structure of the first intake rocker arm and the intake cam;

4 is a partial cross-sectional view showing the IV-IV of FIG. 2, in order to facilitate the operation of the first intake rocker arm and the second exhaust rocker arm, the structure of the first exhaust rocker arm and the exhaust cam is omitted;

Figure 5 is a partial cross-sectional view showing the structure of the air intake switch of the preferred embodiment;

Figure 6 is a partial plan view showing the aspect of the engine valve of the preferred embodiment selecting a valve intake and a valve exhaust; and

Figure 7 is a partial cross-sectional view showing the structure of the exhaust gas exchanger of the preferred embodiment.

3. . . Intake actuating unit

31. . . Intake rocker shaft

32. . . First intake valve

33. . . Second intake valve

34. . . First intake rocker

340. . . First intake slot

35. . . Second intake rocker

350. . . Second intake slot

4. . . Exhaust actuation unit

41. . . Exhaust rocker shaft

42. . . First exhaust valve

43. . . Second exhaust valve

44. . . First exhaust rocker

440. . . First exhaust slot

45. . . Second exhaust rocker

450. . . Second exhaust slot

5. . . Switching unit

51. . . Intake switch

511. . . First air intake

512. . . Second air intake

52. . . Exhaust switch

521. . . First exhaust

522. . . Second exhaust

6. . . Drive unit

61. . . Camshaft

62. . . Intake cam

63. . . Exhaust cam

64. . . Base plate

Claims (8)

A control device for an engine valve includes: a cylinder head including a cylinder head body, the cylinder head body forming an intake passage, and an exhaust passage; and an intake actuation unit including a cylinder head body disposed in the cylinder head body An intake rocker shaft, a first intake valve disposed in the intake passage, a second intake valve disposed in the intake passage, a first intake valve disposed on the intake rocker shaft, and linked to the first a first intake rocker arm of the intake valve, and a second intake rocker arm disposed on the intake rocker arm shaft and interlocking the second intake valve; an exhaust actuation unit including a cylinder disposed on the cylinder An exhaust rocker shaft in the head body, a first exhaust valve disposed in the exhaust passage, a second exhaust valve disposed in the exhaust passage, and a linkage on the exhaust rocker shaft a first exhaust rocker arm of the first exhaust valve, and a second exhaust rocker arm disposed on the exhaust rocker arm shaft and linked to the second exhaust valve; a switching unit including a An intake switch between the first intake rocker arm and the second intake rocker arm, and a first exhaust gas disposed at the first exhaust An exhaust switch between the arm and the second exhaust rocker arm, wherein the intake switch can control whether the first intake rocker arm interlocks with the second intake rocker arm, and the exhaust switch can control the first Whether an exhaust rocker arm interlocks with the second exhaust rocker arm; and a driving unit comprising a camshaft disposed on the cylinder head body, an intake cam disposed on the camshaft, and a camshaft disposed thereon An upper exhaust cam, and a base disposed on the camshaft and located between the intake cam and the exhaust cam and having a circular disk body, wherein the first intake rocker arm abuts against the intake air a cam, the second intake rocker arm abuts against the base plate, the first exhaust rocker arm abuts against the exhaust cam, and the second exhaust rocker arm abuts against the base plate. The control device for an engine valve according to claim 1, wherein the first intake rocker arm is formed with a first intake air gap, and the second air intake rocker is formed with the first intake air gap a second intake slot having a first intake member disposed in the first intake slot, and a second intake slot disposed in the second intake slot and the first intake The second air intake member with the gas members abutted together. The control device for an engine valve according to claim 1, wherein the intake rocker shaft is formed with a first intake oil passage that communicates with the first intake air gap, and a second intake air is connected The second intake air passage is missing. The control device for an engine valve according to claim 2, wherein the first intake rocker arm has a first intake ramp portion located in the first intake intake slot, the second intake rocker arm There is a second intake ramp portion located in the second intake slot. The control device for an engine valve according to claim 1, wherein the first exhaust rocker arm is formed with a first exhaust notch, and the second exhaust rocker arm is formed with a first exhaust notch a second exhaust sump facing the first venting member disposed in the first venting slot, and a second venting slot disposed in the second venting slot a second exhaust member with the gas members abutted together. The control device for an engine valve according to claim 5, wherein the exhaust rocker shaft forms a first exhaust oil passage that communicates with the first exhaust sump, and communicates with the second exhaust The second exhaust oil passage lacking the groove. The control device for an engine valve according to claim 5, wherein the first exhaust rocker arm has a first exhaust ramp portion located in the first exhaust slot, the second exhaust rocker arm There is a second exhaust ramp portion located in the second exhaust sump. The control device for an engine valve according to claim 1, wherein the base plate is a circular disk body.