JPH05340298A - Crank longitudinal shaft engine - Google Patents

Abstract

PURPOSE:To provide a crank longitudinal shaft engine having a crank shaft being longitudinally arranged, which can be easily formed and processed and can improve combustion efficiency. CONSTITUTION:An intake valve 20 and an exhaust valve 21 are horizontally arranged, while an intake port 30 and an exhaust port 31 are formed on an upper surface of an engine main body l, so as to form a V shape. Processing of the intake and exhaust ports is facilitated, and lengths of the ports are required minimum ones. Intake temperature rise is suppressed and combustion efficiency is improved. In addition, exhausting is speedily performed for suppressing temperature rise of an engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical crankshaft engine having a crankshaft arranged in a vertical direction, and more particularly to a work machine such as a generator arranged in an upper portion.

[0002]

2. Description of the Related Art In a crankshaft longitudinal engine, the crankshaft is arranged in the vertical direction, so that the upper end of the crankshaft can be the output side for power take-out. In this case, since the crankshaft is arranged in the vertical direction, the camshaft is also formed in parallel with the crankshaft, and the intake valve and the exhaust valve, which are vertically arranged in the crankshaft direction, are provided with the tappet and the push rod. Are driving through. Although it is considered to cover the entire side surface and bottom surface of the engine with a case, in such a structure, the intake port and the exhaust port are formed on the upper surface of the engine. Are formed so as to respectively communicate with an intake port and an exhaust port on the upper surface of the engine.

[0003]

In the above crankshaft vertical axis engine, the intake valve and the exhaust valve are arranged vertically in the crankshaft direction. Therefore, when connecting the intake port and the exhaust port to the upper surface of the engine, one port can be formed in a substantially straight line shape, but the other port has a structure that bypasses the one port, Cannot be formed, and the port bends and becomes long. Therefore, there is a drawback that port processing becomes difficult. In addition, when the intake port is long, there is a drawback that it is heated in the intake process, the intake temperature rises, and the combustion efficiency decreases, and conversely,
If the exhaust port is long, there is a drawback that heat is radiated more than necessary to the cooling water and the temperature of the engine rises.

That is, according to the present invention, in a vertical crankshaft engine having a vertical crankshaft, the intake and exhaust ports can be easily formed and processed, and the combustion efficiency of the engine can be increased. It is to provide a shaft engine.

[0005]

In order to achieve the above object, the invention according to claim 1 arranges an intake valve and an exhaust valve side by side in a horizontal direction in a crank vertical axis engine whose upper side is a power take-out side. An intake port and an exhaust port communicating with the intake valve and the exhaust valve are connected to the upper surface of the engine.

The invention according to claim 2 is characterized in that an ignition plug or a fuel nozzle is arranged between the intake port and the exhaust port on the upper surface of the engine. In the present invention, the fuel nozzle includes a fuel injection nozzle for a diesel engine or a fuel supply nozzle for a gas engine.

[0007]

According to the present invention, in the crank longitudinal engine,
Since the intake valve and the exhaust valve are arranged horizontally, the intake port and the exhaust port have a structure in which they communicate with the upper surface of the engine in a substantially straight line, which facilitates the formation of the engine and the processing of the port, and increases the port length. Also, it can be minimized. Therefore, the rise of the intake air temperature is suppressed and the combustion efficiency is improved, and further, the exhaust is performed quickly, and the rise of the temperature of the engine is suppressed.

Further, according to the present invention, since the spark plug or the fuel nozzle is arranged between the intake port and the exhaust port, the spark plug or the fuel nozzle can be inspected and replaced from the outside, and maintenance can be performed. It will be easier.

[0009]

1 to 4 show a first embodiment of a crankshaft longitudinal engine according to the present invention. In FIG. 1, reference numeral 1 denotes an engine body, which is formed by a cylinder head 2 and a cylinder block 3 and through which a crankshaft 4 is attached. Reference numeral 5 is a piston that slides in the left-right direction in the drawing. In FIG.
The state where the piston 5 is at the compression top dead center is shown, and the combustion chamber is formed. Also, the cam shaft 7 on which the cam 6 is formed
Is formed in parallel with the crankshaft 4, and its lower end is supported by the bearing base 8.

A gear train 11 including a crank gear 9 attached to the lower end of the crank shaft 4 and a cam shaft gear 10 at the lower end of the cam shaft 7 is arranged on the lower surface of the cylinder block 3. The entire engine 1 including the gear train 11 is covered with an oil pan 12 formed of a thin steel plate in a box shape having an open upper end. The oil pan 12 is attached at its upper end to the lower surface of the flange portion 13 that projects to the side of the engine body 1 by a mounting bracket 14 formed in a substantially U-shape, for example, via a vibration isolator or the like. ing. The mounting bracket 14 is divided and attached to the flange portions 13 on each of the four sides.

An oil pump 15 is arranged on the lower surface of the bearing base 8. The oil pump 15 is driven by the rotation of the crank shaft 4, sucks the lubricating oil at the bottom of the oil pan 12 from the strainer 16, and guides it to the oil filter 17 also provided on the lower surface of the bearing base 8.

Reference numerals 20 and 21 respectively denote an intake valve and an exhaust valve, which are arranged side by side in the left-right direction in FIG. In FIG. 4, reference numerals 22 and 23 are swing type roller tappets swingably supported by the engine body (1),
Each is formed so as to abut the cam 6. The roller tappets 22 and 23 are push rods 2 respectively.
This push rod 2 supports one end of 4, 25.
The other ends of the valves 4, 25 are respectively supported by valve arms 26, 27 provided so as to abut the tips of the intake valve 20 and the exhaust valve 21 to form a valve mechanism. This valve mechanism has two roller tappets 22,
By driving 23, the intake valve 20 and the exhaust valve 2
1 is opened and closed, and is arranged below the engine body 1 in FIG.

An intake port 32 and an exhaust port 33 are opened on the upper surface of the engine body 1. As shown in FIG. 2, the intake port 30 and the exhaust port 31 are connected to the intake port 32 and the exhaust port 33, respectively, from the intake valve 20 and the exhaust valve 21 in a substantially V shape and with substantially equal lengths. There is. Although not shown in the figure, the engine body 1
The air cleaner placed on the upper surface of the
An exhaust silencer, which is also arranged on the upper surface of the engine body 1, is connected to 3. Further, on the upper surface of the engine body 1, a recess 35 for mounting the spark plug 34 is formed at substantially the center of the intake port 32 and the exhaust port 33.

The upper end of the crankshaft 4 projects above the cylinder block 3 and is connected to the upper end of the crankshaft 4, in the left half of FIG. 1 above the engine body 1 and in the left half of FIG. A flywheel 40 is attached.
Reference numeral 41 is an oil detection rod for measuring the level of lubricating oil in the oil pan 12, which is attached so that it can be inserted into and removed from the upper surface of the engine body 1.

Since the intake valve 20 and the exhaust valve 21 are arranged side by side in the left-right direction in the crank vertical axis engine having the above-described structure, the intake port 30 and the exhaust port 31 are substantially linear and have an equal length. The upper surface of the main body 1 can be contacted. Therefore, the temperature of the air-fuel mixture introduced from the intake valve 20 into the combustion chamber is prevented from rising in the intake port 30, and the combustion efficiency can be improved. Further, since the exhaust gas is also quickly discharged to the outside of the engine body 1, it is possible to prevent the heat accumulated in the exhaust port 31 from being radiated to the cooling water more than necessary, and to suppress the temperature rise of the engine body 1. be able to.

The processing of these intake and exhaust ports is as follows.
When the cylinder head 2 is made by die casting, it can be easily integrally formed. Further, in the crank vertical axis engine having the above-mentioned configuration, the valve operating mechanism is arranged below the engine body 1 as a mechanism for simultaneously driving the intake valve 20 and the exhaust valve 21 with one cam 6. Therefore, the gear train 11 including the crank gear 9 and the cam shaft gear 10 can be formed compactly, and the engine can be made smaller and lighter.

Further, since the intake / exhaust ports are formed in a substantially V shape and communicate with the upper surface of the engine body 1, ignition is performed between these ports on the upper surface of the engine body 1 as in this embodiment. The plug 34 can be arranged so that the spark plug 34 can be easily inspected and replaced from the outside.

FIG. 5 shows another embodiment of the present invention in which the fuel nozzle 50 is arranged on the upper surface of the engine body 1 between the intake port 30 and the exhaust port 31. Reference numeral 51 in the figure denotes a sub combustion chamber. Therefore, the present invention can be applied to a diesel engine or a gas engine. In the gas engine, the fuel supply nozzle 5
A spark plug (not shown) is also disposed between the intake port 30 and the exhaust port 31 on the upper surface of the engine body 1 as well as 0. Therefore, as described above, even in the diesel engine or the gas engine, the spark plug 3
4 and the fuel injection nozzle 50 can be easily inspected and replaced from the outside.

[0019]

As described above, according to the present invention, the following effects can be obtained.

Since the intake / exhaust valves are arranged side by side in the horizontal direction in the crank vertical axis engine, one of the intake / exhaust ports does not become long, and the engine upper surface is connected in a substantially straight and even length. Therefore, it is possible to prevent the intake / exhaust temperature from rising due to the heat of the engine, improve the combustion efficiency, and suppress the increase in the engine temperature.

Since the intake / exhaust ports can be connected to the upper surface of the engine in a substantially linear and uniform length, the intake / exhaust ports can be easily processed.

By forming the intake / exhaust ports in a substantially V shape and connecting them to the upper surface of the engine, it is possible to dispose a spark plug or a fuel nozzle between the ports on the upper surface of the engine. Alternatively, the fuel nozzle can be inspected and replaced externally, which facilitates maintenance. In other words, if the intake / exhaust ports are arranged vertically in parallel, the spark plugs will have to be placed not on the top surface but on the side surface, but if the side surface is covered with a soundproof case, inspection, etc. However, this drawback is eliminated.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a partially transverse front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 5 is a partially cross-sectional front view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Engine Main Body 2 Cylinder Head 3 Cylinder Block 6 Cam 7 Cam Shaft 9 Crank Gear 10 Cam Shaft Gear 11 Gear Train 12 Oil Pan 20 Intake Valve 21 Exhaust Valve 22,23 Roller Tappet 24,25 Push Rod 26,27 Valve Arm 30 Intake Port 31 Exhaust port 32 Intake port 33 Exhaust port 34 Spark plug 50 Fuel injection nozzle

Claims (2)

[Claims] 1. In a crank longitudinal axis engine having an upper part on a power take-off side, an intake valve and an exhaust valve are horizontally arranged side by side, and an intake port and an exhaust gas which communicate with the intake valve and the exhaust valve are provided on an upper surface of the engine. Crank vertical axis engine characterized by connecting ports. 2. The crankshaft longitudinal engine according to claim 1, wherein a spark plug or a fuel nozzle is arranged between the intake port and the exhaust port on the upper surface of the engine.