JPS62265413A - Intake/exhaust valve device for four cycle engine - Google Patents

Abstract

PURPOSE:To simplify the valve structure and to reduce the mechanical loss by containing a rotary board rotatably in a thin disc type space formed in a cylinder head then opening/closing the intake and exhaust ports with good timing through rotation of said rotary board. CONSTITUTION:Inner and outer head covers 6, 7 are applied onto a cylinder 1 to provide an enclosed disc type space 8 at the top face of the cylinder 1 then a rotary board 9 having the central shaft 9 journaled rotatably around the centers of respective head covers 6, 7 is contained in said space 8. A communication hole 10 is formed at an eccentric position of said rotary board 9 while pairs of vertical intake ports 11, 11' and exhaust ports 12, 12' are formed at the positions corresponding to the locus of the communication hole 10. The communication hole 10 is lapped over the intake ports 11, 11' with 1/4 rotary phase of the rotary board 9 while lapped over the exhaust ports 12, 12' with 4/4 rotary phase and not communicated with the intake and exhaust ports 11, 11', 12, 12' with 2/4, 3/4 rotary phases.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intake and exhaust valve device for a west cycle engine.

[Prior art and problems to be solved by the invention] Conventionally, this type of valve device has a trumpet-shaped valve body (11Qli') reciprocated by cams (17) (17)' as shown in FIG. K to open and close the intake and exhaust air.
It was something I did.

For this reason, effects such as ■ to @, which will be described later, could not be expected.

[Means for solving problems]

The present invention comprises a thin disc-shaped space provided in the head of a shilling, and a rotary plate that is rotatably supported in this space, and a communication hole is provided at an eccentric location of the rotary plate and above the above-mentioned space. An upper and lower pair of intake ports and an upper and lower pair of exhaust ports are respectively opened at locations corresponding to the locus of the communication hole on the side wall and the lower wall, and a rotating drive device such as a drive gear is equipped on the rotating plate. overlaps with the intake port at the V4 rotational phase of the rotating plate, and V
In a four-cycle engine, the engine is designed to overlap with the exhaust port at the 4-rotation position, and to overlap with the intake port and the exhaust port at the 2/4.3/4 rotation phase to close both of these ports. The present invention aims to meet the above expectations by providing an intake and exhaust valve device that can be used.

〔Example〕

The first embodiment of the present application shown in FIGS. 2 and 3 is formed of a cylinder fil, a piston (2), a crankshaft (3), a crank (4) and a link (5),
1) A thin disk-shaped sealed space (8) is provided on the top surface of the cylinder (1) by covering the K inner head cover (6) and outer head cover (7), and a rotary plate (9) is placed in this space (6). The center of the rotary plate (9) is rotatably supported on the Rad cover +6) (7) by the central shaft (91') and communicated with the eccentric portion of the rotary plate (9). In addition to opening the hole (1G), both the inner and outer head covers (
6) (In terms of force, an upper and lower pair of intake ports αUQU' and an upper and lower pair of exhaust ports u'2 (
13', the upper end of the central shaft (9)' is extended above the outer head cover (7), and a driven gear (I3) is carved on the outer periphery of the extended portion. The gear [14] (the illustration of the drive wj source is omitted) is meshed with the above-mentioned inner and outer head covers (61t7).
Insert the spark plug (1) at a location away from the space (8).
9 is installed, and the communication hole (10 overlaps with the intake port αυC1υ' in the V4 rotation phase of the rotating plate (9), overlaps with the exhaust port u3 (13') in the V4 rotation phase, and connects to the intake port in the 2/4.3/4 rotation phase. port σIJ11)' and exhaust port α7J(IZ
' Both ports were closed off, and a spark plug (19 was designed to fire when the rotating plate (9) was in the V4 rotational phase and the piston (2) was in the upper position) It is.

In addition, the second embodiment and the sixth embodiment shown in FIGS.
The third embodiment shown in the figure and FIG. 7 is a driven gear on the outer periphery of the rotary plate (9)! 13 was cut, and the driven gear (13) was meshed with the driving gear I, and the spark plug α9 was installed on the above-mentioned central shaft (9)' without interfering with the rotation of the rotating plate (9). It is something.

[For production]

Incidentally, the operation of the present invention is also clear from FIGS. 8 to 11.

The rotating plate (9) is in the V4 rotational phase and the crank (4) is in the V4 rotational phase.
When the rotation phase is 2, the rotary plate (9) performs the suction stroke at 2/
When the shift rank (4), which is in the 4 rotation phase, is in the V2 rotation phase, the compression stroke is performed, and when the shift plate (9), which is in the 374 rotation phase, is in the V2 rotation phase, the explosion stroke is performed. Shift rank (4) with rotary plate (9) in V4 rotational phase
When it reaches the V2 rotational phase, it constitutes an exhaust stroke.

〔Effect of the invention〕

Since the present invention is as described above, (1) the principle of the intake/exhaust valve mechanism can be mechanically simplified to an extremely ideal level; (Ideal embodiment of the principle of a valve mechanism) ■ Since the intake and exhaust valve bodies are plate-shaped rotating bodies, the cost of mechanical movement can be reduced to the utmost without unreasonableness. (
Solving issues such as insufficient intake air, incomplete combustion, raw gas discharge, residual gas in the cylinder, etc.) Since the valve body rotates, it is always fully open at peak times during intake and exhaust operation, improving intake and exhaust efficiency. can be easily and simply improved. (Satisfaction of purpose of use) ■ The fidelity and followability of the mechanical operation required for the movement of the valve body is dramatically improved, and the valve body can be ideally synchronized within the entire engine movement system. (Improved fidelity and followability) ■ The valve bodies used in conventional engines are fixed and actuated separately for intake and exhaust, so the engine cylinder At least two or more valve bodies are required for each valve body, but in the present invention, one plate-shaped rotary valve body satisfies all the conditions required for intake/exhaust valve bodies. (Simplification of the valve system) ■ Since it consists of a single rotating plate, it can be easily converted into a high-speed engine or an engine that emphasizes low-speed torque by simply modifying the cylinder head of a conventional four-cycle engine. In particular, since the valve body of the present invention is a rotary type, it exhibits its true value of high efficiency in high-speed engines. (Improving the efficiency of high-speed engines) ■ Simultaneously satisfying the trap of reducing fuel consumption and increasing output. (Improvement of fuel consumption and output) ■ The efficiency of intake and exhaust air is dramatically improved, so it is possible to get closer to the ideal direction for complete combustion in the cylinder. The toxicity contained in the gas can also necessarily be reduced. (Improvement of exhaust gas) ■ Overall, the mechanical and structural simplification of the entire engine block will be carried out, resulting in a more efficient engine mechanism. (Engine weight reduction) [Phase] The entire engine block is simplified, making maintenance, maintenance, maintenance, and adjustment work extremely easy during use. (Improvements in maintenance, etc.) Medium The maintenance of the entire engine has become easier (
Mechanical durability is extended to the extent that the structure is simplified. (Improved durability) When the rotary plate-shaped valve body of the present application is in operation, the intake and exhaust ports are always fully opened alternately, which not only pushes the output of the engine itself but also increases the range of rotation speed of the entire engine. It can be set at will to exceed the limits of material and mechanical durability. This means that along with the improved combustion effect obtained by the valve body of the present invention, it is naturally possible to easily maintain output and torque in the high rotation range, and to reduce the attenuation of torque in the high rotation range. doesn't happen. (Improvement of torque in high rotation range) ・Since the valve body of the present application is a rotary plate type, compared to the mechanism of the conventional trumpet type reciprocating valve body, it is less likely to occur mechanically in the intake/exhaust valve system during engine operation. The noise produced is extremely reduced and becomes very quiet.

(Improvement of noise) ■Since the overall structure is simple, the absolute weight of the valve body mechanism system can be easily reduced in the weight distribution of the entire engine block.

(Weight reduction) It has excellent effects such as:

[Brief explanation of drawings]

Figure 1 is a sectional view showing the conventional one, and Figure 2 is the first one of the present application.
A sectional view showing the embodiment, FIG. 3 is an exploded perspective view, and FIG. 4 is an exploded perspective view.
The figure is a sectional view showing the second embodiment of the present application, Fig. 5 is an exploded perspective view of the main parts, Fig. 6 is a sectional view showing the third embodiment of the invention, and Fig. 7 is an exploded perspective view of the main parts. 8 is an explanatory diagram of the suction stroke, FIG. 9 is an explanatory diagram of the compression stroke, FIG. 410 is an explanatory diagram of the explosion stroke, and FIG. 11 is an explanatory diagram of the exhaust stroke. Tl)...Cylinder, (2)...Piston, (3
)...Crankshaft, (4)...Crank, (5)・
・・Link, (6)・・Inner head cover, (7)・
...outer head cover, (8)...space, (9)...
・Rotating plate, (91'...center axis, αto...communication hole, round u'...intake port, α3(1■'...exhaust port, u3・
... Driven gear, (L9... Spark plug, αsue'
...Valve body, αnαD'...cam.

Claims (1)

[Claims] A thin disk-shaped space provided in the cylinder head,
A rotating plate is rotatably supported in this space, and a communication hole is provided at an eccentric location of the rotating plate, and an upper and lower pair is provided at a location corresponding to the locus of the communication hole in the upper and lower walls of the space. An intake port and a pair of upper and lower exhaust ports are respectively opened, and the rotating plate is equipped with a rotating drive device such as a drive gear, and the communication hole overlaps with the intake port in the 1/4 rotation phase of the rotating plate, and the rotating plate rotates 4/4. An intake and exhaust system in a four-cycle engine characterized in that it overlaps with the exhaust port in the position and conflicts with the intake port and the exhaust port in the 2/4 and 3/4 rotational phases, blocking both ports. Valve device.