JP2813251B2 - Inclined internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement for inclining an engine cylinder to reduce the overall height.

[0002]

2. Description of the Related Art Conventionally, a technique for arranging a crankshaft vertically and a cylinder horizontally is known. For example, this is a technique disclosed in Japanese Utility Model Publication No. 1-21577.

[0003]

Since the engine of the prior art is a marine engine, the crankshaft is arranged vertically so that it can be directly connected to the output shaft. When the number of cylinders is increased, the total height increases in proportion to the number of cylinders. Therefore, the crankshaft is arranged in the horizontal direction, and the cylinder is inclined to some extent to reduce the overall height. However, if the crankshaft is arranged as it is in the horizontal direction, the flow of lubricating oil, fuel, cooling water, exhaust gas, etc. changes, and it is necessary to greatly change the arrangement and component shape. It is intended to be able to suppress the increase in cost by using parts as they are.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides an engine in which a crankshaft is laid horizontally and a cylinder center line is inclined, and a unit injector is provided in a cylinder case. When it is arranged below the center line, the relationship between the angle α formed by the unit injector and the cylinder center line and the inclination angle θ of the center line is θ>
In addition to α, the relationship between the angle β formed by the perpendicular of the valve arm chamber lid mounting surface and the cylinder center line and the inclination angle θ is θ ≧ β. In addition, an intake inlet is disposed below the cylinder center line, and a valve arm chamber lid, a supply port, a thermostat, an oil filter, and a fuel filter are disposed above the horizontal line.

Further, the cylinder head and the cylinder block are integrally formed, and the mixing elbow is directly mounted on the cylinder block at a position offset from the center of the crankshaft to communicate with the exhaust manifold, and the oil pan is provided below the bearing case of the crankshaft. The bearing case and the oil pan are connected by a detachable pipe, and only the oil pan portion is detachably supported.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problem to be solved by the present invention and the means for solving it are as described above. Next, the configuration of the embodiment shown in the attached drawings will be described. 1 is a front view of the engine, FIG. 2 is a plan view thereof, FIG. 3 is a rear view thereof, FIG. 4 is a front sectional view thereof, and FIG. 5 is a plan sectional view thereof. The tilted engine shows an embodiment of a three-cylinder engine having three cylinders. A crankshaft 1 is horizontally laid between a lower part of a cylinder block 10 and a bearing case 11, and a crank outside the cylinder block 10 is provided. A pulley 4 for applying a timing belt and a flywheel 2 are fixedly mounted on the front portion of the shaft 1, and a ring gear 5 is provided on the outer periphery of the flywheel 2.
The ring gear 5 meshes with a gear fixed to the drive shaft of the starter motor 9 so that the flywheel 2
Is configured to rotate.

The upper part of the cylinder block 10 is a cylinder head 10a, and the lower part is a cylinder case 10a.
b, a lower portion thereof is a crankcase portion 10c, and the lower portion of the crankcase portion 10c is fixed to the bearing case 11 and the crankshaft 1 is mounted on the shaft. The bearing case 11 and the oil pan 1 are suspended and supported via a stay 43.
8 are communicated by a detachably provided pipe 44,
The oil pan 18 can be easily attached and detached, the oil can be completely changed, maintenance can be easily performed, and the capacity of the oil pan 18 can be easily changed.

[0008] One end of a connecting rod 7 is pivotally supported on the crankshaft 1 in the crankcase, and a piston 6 is pivotally supported at the other end of the connecting rod 7. The piston 6 is inserted into the cylinder case 10a and is capable of reciprocatingly sliding left and right in an oblique direction. Several piston rings are fitted around the side surface, and a liner is provided between the piston 6 and the cylinder 10a of the sliding portion. It is interposed.

At the center of the cylinder head 10b above the piston 6, a fuel injection nozzle 21 is provided. The fuel injection nozzle 21 is connected to a fuel injection pump to form the unit injector 8, and the piston 6 reciprocates. It is configured to supply fuel in conjunction with the cylinder head 10b.
It is mounted on the boss in the upper center. The unit injector 8 has an upper end of a plunger 26 abutting on a rocker arm 24 in a barrel 25, the rocker arm 24 pivotally supports a central portion on a support shaft 29, and the other end thereof has a camshaft 2.
3, the cam shaft 23 is rotated from the crankshaft 1 via the timing belt 12, and the fuel is injected from the nozzle 21 by the rotation of the rocker arm 24.

An exhaust port 13 and an intake port 14 are provided in the cylinder head 10a, and an exhaust valve 15 and an intake valve 16 are inserted into the respective ports. The exhaust valve 15 and the intake valve 16 are connected to the piston side by a spring. And the other side is rocker arm 2
7 and 27, the rocker arm 27 is pivotally supported at the center by a support shaft 30, and the other end is in contact with a cam 32 fixed on the cam shaft 23. The rocker arm 27 allows the exhaust valve 15 to be opened by the decompression device 33, and rotates the decompression bar at the time of starting to prevent pressure from being applied to the inside of the cylinder.
The rocker arms 24 and 27 and the camshaft 23 are housed in a valve arm chamber 34, and the other side is closed by a valve arm chamber lid 35. A refueling port 36 is provided above the valve arm chamber lid 35.

An intake port 14 provided in the cylinder head 10a is connected via an intake manifold to an intake port 37 formed of an intake silencer, and an exhaust port 14 is provided in an exhaust port formed in the cylinder block 10 as shown in FIG. The exhaust manifold 10j is communicated with the manifold 10j and an inner pipe 45a in the mixing elbow 45.
The mixing elbow 45 and the mixing elbow 45 are positioned so as to avoid the reduction gear or the clutch case A which is offset from the center O of the crankshaft 1. The mixing elbow 45 is directly fixed to the cylinder block 10, and the mixing elbow 45 and the inner pipe 45a are connected. In the meantime, after cooling the engine and fresh water (water in the radiator), the seawater (used in the present embodiment for the marine engine and guided from outside) is passed through, and formed in the cylinder block 10. Cooled water channel 10
i, and the other end of the mixing elbow 45 is connected to an exhaust pipe 46, which also serves as a muffler for discharging cooling water and exhaust gas from the exhaust pipe 46.
The length a is set to such a length that the cooling water does not flow backward to the exhaust manifold 10j.

A water jacket 10d is formed around the intake port 14 and the exhaust port 15 and is connected to a radiator to cool the cylinder block 10 so that cooling water (fresh water) can circulate to cool the cylinder block 10. Is provided with a thermostat 39 to detect the temperature of the cooling water. Further, a valve or the like is provided between the water jacket 10d and the radiator. When the cylinder block 10 is in a cold state, the combustion efficiency is deteriorated. Valves and the like are closed so that circulation is not possible below the temperature. The fuel injector 40 is connected to the unit injector 8 via a fuel pipe.
Is connected to the fuel tank and the cylinder block 1
An oil filter 41 that communicates with the hydraulic pump is mounted on the upper part.

As shown in FIG. 4, the center line L1 of the cylinder of the cylinder block 10 is inclined at an angle θ, that is, about 30 to 40 degrees with respect to the horizontal line L2, and a thermostat is provided above the center line L1. The valve arm chamber cover 35, the supply port 36, the fuel filter 40, and the oil filter 41 are disposed above the horizontal line L2 intersecting the center of the crankshaft 1. Have been. The unit injector 8 is located below the center line L1, and the relationship between the angle α between the center line L3 of the unit injector 8 and the center line L1 and the angle θ are θ> α. Further, the relationship between the angle β formed by the perpendicular L4 of the mounting surface of the valve arm chamber lid 35 and the center line L1 and θ is θ ≧ β.

[0014]

As described above, the present invention has the following effects. That is, the valve arm chamber lid, the lubricating oil supply port, the thermostat, the oil filter, and the fuel filter are arranged on the upper side. The valve arm chamber lid was easily detached and attached, and the cams and the decompression housed therein could be easily maintained, and when the valve arm chamber lid was opened, there was no oil leakage.

Further, since the intake port is provided below the inclined center line of the cylinder, it is possible to inhale cool air and improve the combustion efficiency, and to offset the mixing elbow from the center of the crankshaft. Directly attached to the cylinder block at the position where it was set, exhaust and cooling water can be discharged from one place, making the discharge part compact, easy to connect, and the outlet is far from the crankshaft, so deceleration The connection can be made while avoiding the machine or the clutch case, and the piping route can be shortened.

Since the oil pan is suspended below the bearing case of the crankshaft, and the bearing case and the oil pan are connected by a detachable pipe, the oil pan can be easily attached and detached. In addition to replacement, the capacity can be easily changed.

[Brief description of the drawings]

FIG. 1 is a front view of an engine.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a front sectional view of the same.

FIG. 5 is a plan sectional view of the same.

FIG. 6 is a sectional view of a mixing elbow connection portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crankshaft 6 Piston 8 Unit injector 10 Cylinder block 10a Cylinder head 10b Cylinder case 11 Bearing case 18 Oil pan 22 Seal 35 Valve arm chamber lid 36 Refill port 37 Intake port 39 Thermostat 40 Fuel filter 41 Oil filter 44 Pipe 46 Mixing elbow

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI F02B 67/00 F02B 67/00 Q F02F 1/00 F02F 1/00 L F16C 9/02 F16C 9/02 (72) Inventor West Susumu 1-32, Chaya-cho, Kita-ku, Osaka-shi, Japan Yanmar Diesel Co., Ltd. −118360 (JP, U) Actually open 63-63515 (JP, U) Actually open 63-132826 (JP, U) Actually open 2-12032 (JP, U) Actually open 1-97011 (JP, U) ) Japanese Utility Model 1-97065 (JP, U) Japanese Utility Model 1-21157 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) F02M 61/14 310 F02F 1/00-1 / 42 F02B 67/00 F01M 11/00 F01N 3/02 B63H 21/30 F16C 9/02

Claims (5)

(57) [Claims] In an engine in which a crankshaft is horizontally extended and a cylinder center line is inclined, when the unit injector is disposed below the center line of the cylinder case, the unit injector and the cylinder center line are disposed. And the inclination angle θ of the cylinder center line is θ
> Α, and the relationship between the angle β between the perpendicular of the valve arm chamber lid mounting surface and the cylinder center line and the inclination angle θ is θ ≧ β. 2. An engine in which a crankshaft is horizontally extended and a cylinder center line is inclined, wherein a valve arm chamber lid, a supply port, a thermostat, an oil filter, and a fuel filter are disposed on an upper side. Type internal combustion engine. 3. An engine in which a crankshaft is laid horizontally and a cylinder center line is inclined, wherein an intake port is arranged below the cylinder center line and a thermostat is arranged above the cylinder center line. Type internal combustion engine. 4. A tilted engine having a cylinder head and a cylinder block integrally formed and having an exhaust manifold built therein, wherein a mixing elbow is directly mounted on the cylinder block at a position offset from the center of the crankshaft and communicates with the exhaust manifold. A lean internal combustion engine. 5. An inclined engine in which a cylinder head and a cylinder block are integrally formed, wherein an oil pan is suspended below a bearing case of a crankshaft and supported, and the bearing case and the oil pan are connected by a detachable pipe. And an inclined internal combustion engine wherein only an oil pan portion is configured to be detachable.