JPS58176410A - Moving valve device for reciprocating engine - Google Patents

Abstract

PURPOSE:To reduce the fuel consumption rate, by providing a rotary valve which is driven to rotate around a cylinder axis and comprises an air intake communicating port for opening and closing an air intake port, an exhaust communicating port for opening and closing an exhaust port and an air injection communicating port for opening and closing an air injection port. CONSTITUTION:A head of a cylinder 28 is provided with an air intake and exhaust ports 24 and 25, and an air injection port 29. The air intake port is made to supply a thin fuel gas which will not ignite for itself. When the port 24 is used for drawing fresh air, the port 25 is used for exhausting a burnt gas, and vice versa. In Figure, there is illustrated a rotary valve driving shaft 19, gas conduits 20, 21, a rotary valve body 22 and a bearing and spring 23 bearing the rotary valve 22. In this way, a thin fuel gas which would be impossible to ignite otherwise is caused to ignite with an injection of air, thereby reducing a fuel consumption rate.

Description

[Detailed description of the invention] The present invention relates to a valve train for a reciprocating engine.

Conventional internal combustion engines use reciprocating valves as shown in FIG. 1 to control supply and exhaust. In the figure, 1 is an air intake valve control spring (valve spring), 2 is an exhaust valve control spring (valve spring), 3 is an air intake valve cam, 4 is an exhaust valve cam, and 5 is an exhaust valve control spring.
, 6 is a cam drive gear.

7 is the spark plug hole, 8 is the intake valve, 9 is the exhaust valve,
10 is a piston, 11 is a cylinder, 12 is an air supply hole, 13
1 is an exhaust hole, and 14 is a cam-driving belt.

In this case, a large amount of stress was applied to the valves 8 and 9 due to the reciprocating motion, which caused damage. still.

In order to reciprocate the supply and exhaust valves 8.9, the valve springs 1.2
and cams 5 and 6, there are problems such as valve surging that occurs when one engine rotates at high speed, and the valve spring 1
, 2, the output loss of the engine is also significant.

Furthermore, when a supercharger is used, it is necessary to take measures such as strengthening the valve springs 1 and 2 to resist the increased pressure, which often causes spring breakage.

On the other hand, there are overhead rotary valves that rotate in the direction of the crankshaft, but they have many problems, including sealing problems, and have not been commercialized.

The object of the present invention is to focus on the above-mentioned points, and has been made for a valve train for a reciprocating engine.The present invention is characterized by an air supply port, an exhaust port, and an air injection port provided in the cylinder head. A rotary valve that is driven at the beginning of the cylinder axis and is formed with an air supply vent that opens and closes the air supply port, an exhaust vent that opens and closes the exhaust port, and an air injection vent that opens and closes the air injection port. That's what I prepared for.

The present invention can be widely applied to gasoline engines in general (2-stroke uniflow, 4-stroke), diesel engines in general (2-stroke uniflow, 4-stroke), and reciprocating pumps.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a cross-sectional view of an engine equipped with a device according to one embodiment of the present invention, and FIG. 3 is a diagram showing the arrangement of the air supply port, exhaust port, and air injection port on the upper surface of the combustion chamber according to the present invention, and the corresponding rotary valve supply. FIG. 4 is an explanatory diagram showing an air vent, an exhaust vent, and an air injection vent, and FIG. 4 is an explanatory diagram showing an operating state of the rotary valve shown in FIG. 3.

In the figure, 15 is a pinion gear drive gear.

γ 16 is a pinion gear, 1\ is a cogged belt, 18 is a rotary valve drive gear, 19 is a rotary valve drive shaft 20.21
22 is a gas conduit, 22 is a rotary valve body, 23 is a bearing and spring that supports the rotary valve 22, 24 and 25 are supply/exhaust openings, and the air supply opening is for supplying diluted fuel gas that does not ignite by itself. It is. Note that when the opening 24 is used for air supply, the opening 25 is used for exhaust air, and conversely, when the opening 24 is used for exhaust air, the opening 25 is used for air supply. 2
6 is a spark plug, 27 is a piston, and 28 is a cylinder.

29 is an air injection hole.

In Fig. 3, A represents the number of supply and exhaust ports.

B indicates the rotational speed of the valve relative to the rotational speed (1 rotation) of the internal combustion engine, C indicates the upper surface of the combustion chamber of the cylinder head, and D indicates the rotary valve.

The operation in the case of the above configuration will be described.

FIG. 4 shows the upper surface of the combustion chamber shown in FIG. 3 superimposed on the rotary valve, and shows some of the holes in four directions. Below, 1. The process from exhaust (1) to 69 ignition will be explained. In addition, 24 is an exhaust vent of the rotary valve, and 25 is a rare gas supply vent of the rotary valve.

24-1 is an exhaust port on the top surface of the combustion chamber, 25-1 is a diluted gas supply port on the top surface of the combustion chamber, 29 is an air injection hole of a rotary valve, and 29-1 is an air injection port on the top surface of the combustion chamber. .

(2) is the exhaust (I) where the first hole 24 approaches the exhaust port 24-1. That is, this shows the stage in which the piston 27 moves upward. 2 is exhaust (II), and one hole 24 is located above the exhaust port 24-1, indicating the stage at which exhaust gas is discharged.

3 is air supply (I) (lean fuel gas supply starts) with 2 holes 25
is approaching the air supply port 25-1. That is,
Piston 27 is near top dead center. 4 is air supply (■) (start of air injection), one hole 25 is above the air supply port 25-1,
This is the stage where the diluted fuel gas is sucked into the combustion chamber. It's 1.
This is where the air injection hole 29 approaches the air injection port 29-1. 5 is a compression stage in which the two holes 25 pass through the air supply port 25-1, the piston 27 moves upward, and the fuel gas is compressed. 6 indicates ignition, which is the stage in which the fuel gas is ignited just before the piston reaches top dead center.

The above case has the following effects.

(5) (1) Two ignition power is given by injecting oxygen to diluted fuel gas which cannot normally be ignited.

(2) Since the internal combustion engine is operated using diluted fuel gas, fuel consumption can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of a conventional internal combustion engine. FIG. 2 is a cross-sectional view of an engine equipped with a device according to one embodiment of the present invention, and FIG. 3 is a diagram showing the arrangement of the air supply port, exhaust port, and air injection port on the upper surface of the combustion chamber according to the present invention, and the corresponding rotary valve supply. FIG. 4 is an explanatory diagram showing an air vent, an exhaust vent, and an air injection vent, and FIG. 4 is an explanatory diagram showing an operating state of the rotary valve shown in FIG. 3. 24...Exhaust vent, 24-1...Exhaust port, 25...
- Air supply vent, 25-1... Air supply port, 29... Air injection vent. 29-1...Air injection port. iFl -50-

Claims (1)

[Claims] 1 An air supply port, an exhaust port, and an air injection port provided in the cylinder head, an air supply vent that is driven around the cylinder axis to open and close the air supply port, an exhaust vent that opens and closes the above exhaust port, and the air A valve train for a reciprocating engine, comprising a rotary valve formed with an air injection hole for opening and closing an injection port.