JPS5999014A - Valve device for internal-combustion engine - Google Patents

Abstract

PURPOSE:To improve the valve closing performance in a valve device employing a rotary type valve body by forming an intake passage and exhaust passage in the valve body with their inlet and outlet ports displaced in the direction of the valve shaft. CONSTITUTION:A rotary valve body 1 which is rotated by the crankshaft rotation transmitted through a sprocket 3 is provided with intake and exhaust passages which are disposed parallelly along the direction of the shaft in a multiple number respectively. The intake passage 6 is formed in such a manner that a hole drilled from an inlet part 8 in the outer circumference of the valve body 1 toward the center perpendicular to the shaft axis of the valve body 1 is bent to the direction of the shaft axis and is twisted to be connected to an outlet 9 on the circumferential surface. The exhaust passage 7 is formed much like the intake passage 6, but its outlet 13 and inlet 14 are communicated to an exhaust manifold 16 and an exhaust port 15 at a specific exhaust timing. The valve body 1 is provided on its outer circumference with annular grooves 17, 18 in a space around the inlet port 8 of the intake passage 6 and outlet 13 of the exhaust passage 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a pulp device for an internal combustion engine, particularly a valve mechanism for controlling the inflow and outflow of intake gas and exhaust gas into a combustion chamber of an internal combustion engine. This is related to the zo device.

In a valve mechanism for controlling intake gas and exhaust gas flowing into and out of a combustion chamber of an internal combustion engine, conventional devices usually open and close the intake valve and the exhaust valve by vertical movement of the valve body. Therefore, force is required to make this vertical movement!・Shaft, rocker arm, rocker the d? -), number 1 including valve lifter, head cover and other parts
Many parts are required to reach the 0 point, which leads to high manufacturing costs, and there are various restrictions on the shape and arrangement of the valve in order to prevent the valve body from jumping up during high-speed operation. ing. In order to solve this problem, a valve device using a rotary set of valve bodies that does not require vertical movement of the valve body has been proposed, and the present invention relates to an improvement of this type of valve device. The purpose is to improve the airtightness of a valve device for an internal combustion engine using a rotary set of valve bodies and improve the intake and exhaust efficiency.

In order to achieve the above object, the present invention has the following configuration:
In a valve device for an internal combustion engine, a cylindrical valve body rotated by driving force from a crankshaft is installed in a cylinder head between an intake/exhaust manifold and an engine combustion chamber. an intake passage having an inlet that communicates with the intake manifold and an outlet that communicates with the intake port of the engine combustion chamber by rotation of the valve body, the inlet and the outlet being disposed offset in the axial direction of the valve body; The exhaust passage has an outlet communicating with the exhaust manifold and an inlet communicating with the exhaust port of the engine combustion chamber, and the outlet and the inlet are disposed offset in the axial direction of the valve body. In addition, the inlet of the intake passage and the outlet of the exhaust passage as described in iii.
The valve device for an internal combustion engine is characterized in that the valve device communicates with annular grooves provided in the circumferential direction of the outer periphery of the valve body and constantly communicating with the intake manifold or the exhaust manifold.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention,
In the figure, °1 is a cylindrical rotary valve body, which is arranged so as to be in close contact with the inner wall surface of the head cylinder 2 of the engine (Figures 2 and 3).
(Fig.), the rotational force of a crankshaft 4 is transmitted via a timing chain 5 to a streak rocket 3 fixed to one end thereof, so that a rotary valve body 1 is rotated. As shown in FIG. 1, the rotary valve body 1 has a plurality of intake passages 6 and a plurality of exhaust passages 7 arranged in parallel along its axial direction. The intake passage 6 has an inlet 8 formed on the outer periphery of the valve body 1, and a hole bored from the entrance 8 toward the center in a direction perpendicular to the axis of the valve body 1, which is bent along the axis. Further, from there, it is bent toward the outer circumference in a direction perpendicular to the axis so as to lead to an outlet 9 provided on the circumferential surface.
Its entire shape is twisted, therefore its population 8
and the outlet 9 are arranged at offset positions in the axial direction of the valve body 1 and with a phase difference of 90° in the direction of rotation of the valve body 10. Therefore, the population 8 communicates with the intake manifold 10 through an opening (not shown) provided in the head cylinder 2 only at a specific time preset by the rotation of the valve body 1, and also communicates with the intake manifold 10 through an opening (not shown) provided in the head cylinder 2.
is configured to communicate with an intake port 12 of a combustion chamber 11 of the engine. The exhaust passage 7 is also formed in substantially the same shape as the intake passage 6, but its outlet 13 is provided in the head cylinder 2 only at a specific time preset by the rotation of the valve body 1. Opening (not shown)
It communicates with an exhaust manifold 16 (FIG. 3) through the exhaust manifold 16 (FIG. 3), and its port 14 communicates with the exhaust port 15 of the engine combustion chamber 11. Furthermore, exit 13
The size of the inlet 14 may be slightly different from the sizes of the inlet 8 and outlet 9 of the intake passage 6. An annular groove 17 is further provided on the outer periphery of the valve body 1 at a location where the inlet 8 of the intake passage 6 is provided, and the groove 17 is formed so that the valve body 1 is rotated regardless of the rotation of the valve body 1.
The head cylinder 2 is constantly communicated with the intake manifold 10 through an opening provided in the head cylinder 2 . Therefore, intake air is supplied from the intake manifold 10 to the intake passage 6 via the annular groove 17. Similarly, outlet 1 of exhaust path 7
An annular groove 18 is provided at the location where 3 is provided, and the area 18
is always in communication with the exhaust manifold 16 through an opening provided in the head cylinder 2 regardless of the rotation of the valve body 1. Therefore, the exhaust air is discharged from the exhaust path 7 to the annular groove 18.
It will be discharged to the exhaust manifold 16 through.

Furthermore, sealing rings 19 and 19 are provided on the outer peripheral surface of the valve body 1 between the inlet 8 and the outlet 9 of the intake passage 6 and between the outlet 13 and the inlet 14 of the exhaust passage 7, respectively. (Figure 1,
(Fig. 1a) Furthermore, a through hole 20 is provided inside the valve body 1 parallel to its axis as shown in Fig. 81S1 and Fig. 2,
Cooling water is fed into the through hole 20 from the rear side of the block cylinder 21 through a water cover 22.

Furthermore, as shown in FIG. 2, the head cylinder 2 is provided with a hole 23 through which lubricating oil is pumped into the rotating contact area between the rotary valve body 1 and the head cylinder 2. In addition, 24 is a carburetor, 25 is a spark plug, 26 is a piston, and 27 is a connecting rod ◎ In this embodiment having the above configuration, first, the unburned gas vaporized from the carburetor 24 is transferred to the intake manifold. 10 and the opening of the head cylinder 2, enters the intake passage 6 in the valve body 1 from the inlet 8 via the bi-shaped groove 17, and the outlet 9
As shown in FIG. 2, the rotation of the valve body 1 causes unburned gas to be supplied into the combustion chamber 11 in alignment with the intake port 12 of the engine combustion chamber 11, and then to the piston 26 in the cylinder bore.
At the same time as the valve body 1 rises, the valve body 1 is also rotated by the rotational force transmitted from the crankshaft 4 through the timing chain 5 and the sprocket 3, so that the outlet 9 is misaligned with the intake port 12, and the combustion chamber 11 is sealed. , compression, and combustion are performed, and then the inlet 14 of the exhaust passage 7 of the valve body 1 becomes aligned with the exhaust port 15 of the combustion chamber 11, and as shown in FIG. One cycle of the engine is completed by exhausting the inside of the exhaust passage 7 in the body 1 to the outside of the engine through the zb outlet 13, the annular groove 18, the opening provided in the head cylinder 2, and the exhaust manifold 16. . During one rotation of the valve body 1, intake, compression, combustion, and exhaust strokes are performed. In this way, the rotation of one valve body 1 can open and close the intake and exhaust ports of the combustion chambers of all cylinders of a multi-cylinder engine. Since the passages 7 communicate with current grooves 17 and 18, which are provided on the outer periphery of the valve body 1 and are always in communication with the intake manifold 10 and the exhaust manifold 16, the intake passage 6 and the exhaust passage 7 are always under pressure. The outlet 9 or the inlet 14 is connected to the combustion chamber 11.
Immediate intake when it matches the intake port 12 or exhaust port 15 of
Alternatively, since there is no time delay between supplying or discharging exhaust gas, the intake and exhaust efficiency is improved. In addition, since the intake passage 6 and the exhaust passage 7, the intake passage 8 and the outlet 9 and the outlet 13 and the inlet 14 are both arranged offset in the axial direction of the valve body 1, there is no valve body between these inlets and the outlet. Since there is a rotating contact area of 1, the airtightness of the combustion chamber 11 is good, and since the sealing ring 19 is located in this area, the airtightness is further improved. The inlet 8 on the intake manifold 10 side and the outlet 13 on the exhaust manifold side of the air passage 6 and exhaust passage 7 are respectively the outlet 9 and the inlet 4 on the combustion chamber 11 side.
Since there is a phase difference of 90'' in the direction of rotation of the valve body 1, the airtightness of the combustion chamber can be maintained by providing a rotating contact area of the valve body 1 between them.

Furthermore, by passing cooling water through the axial through hole 20 of the valve body 1, thermal expansion and distortion of the valve body 1 can be prevented.

As explained above, the present invention controls the inflow and outflow of intake gas and exhaust gas flowing into the combustion chamber by rotating the valve body, so there is no need to move the valve body up and down, and the movement of the valve body becomes circular fh. , the number of parts in the valve device is reduced, high-speed rotation control is possible, and the valve elements at the inlet and outlet of the intake and exhaust passages are arranged in an axially shifted position in the rotary valve body. The valve has good sealing properties, and the inlet of the intake passage and the outlet of the exhaust passage are always in communication with the intake and exhaust manifold sides via the annular groove, which improves intake and exhaust efficiency. It has the following effects.

[Brief explanation of the drawing]

FIG. 3 is a cross-sectional view taken along line AA, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 1...Rotary valve body, 2...Head cylinder, 4...
Crankshaft, 6...Intake path, 7...Exhaust path, 8...
・Intake path inlet, 9...Intake path outlet, 10...Intake manifold, 11...Engine combustion chamber, 12...
- Combustion chamber intake port, 13... Exhaust path outlet, 14... Exhaust path inlet, 15... Combustion chamber exhaust port, 16... Exhaust manifold, 17.18... Annular groove, 19...
- Sealing ring, 20...through hole. Patent applicant: Akira Aoki, patent attorney, Kazuyuki Nishidate, patent attorney, Kyosuke Tsuchinakayama, patent attorney, Akira Yamaguchi, patent attorney

Claims (1)

[Scope of Claims] 1. A pulp apparatus for an internal combustion engine in which a cylindrical valve body rotated by a driving force from a crankshaft is installed between an intake manifold and an exhaust manifold of a cylinder head and an engine combustion chamber, The valve body has an inlet that communicates with the intake manifold and an outlet that communicates with the intake port of the engine combustion chamber by rotation of the valve body, and the inlet and the outlet are arranged offset in the axial direction of the valve body. It has an intake passage, an outlet that communicates with the exhaust manifold by rotation of the valve body, and an inlet that communicates with the exhaust port of the engine combustion chamber, and the outlet and the inlet are arranged to be offset in the axial direction of the valve body. an exhaust path, and furthermore, the inlet of the intake path and the outlet of the exhaust path communicate with each current groove provided in the circumferential direction of the outer periphery of the valve body and constantly communicating with the intake manifold or the exhaust manifold. An internal combustion engine pulp unit characterized by: 2. Each inlet and outlet of the intake passage and the exhaust passage are bored from the outer periphery of the valve body in a direction perpendicular to its axis, and the inlet and outlet have a phase difference of 90° in the rotational direction of the valve body. A valve device for an internal combustion engine according to claim 1, which is arranged as follows. 3. The pulp apparatus for an internal combustion engine according to claim 1, wherein a sealing ring is installed between the inlet and outlet of the intake passage and the υ1° air passage on the outer periphery of the valve body. 4. The pulp apparatus for an internal combustion engine according to claim 1, wherein an axial cooling passage is provided inside the valve body.