JPS5853176B2 - Opposed piston internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to provide an internal combustion engine with low vibration and a small engine width, and for this purpose, two pistons are operated in one cylinder by directly opposing each other. As a specific means, one crankcase is provided on each side of one cylinder, and each connecting rod connects two pistons inserted into the cylinder and each crankshaft pivoted in each crankcase. It is characterized by being connected.

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

FIG. 1 shows a schematic longitudinal sectional front view of a piston-opposed water-cooled single-cylinder four-stroke tasel engine, and FIG. 2 shows a schematic plan view.

In the figure, reference numeral 1 designates one cylinder, and one crankcase 2.degree. 3 is fixed to each of its left and right ends.

Two pistons 4 and 5 inserted into the cylinder 1 are opposed to each other.

Each piston 4, 5 and each crankshaft 6, 7 pivotally supported in each crankcase 2.degree. 3 are connected by respective connecting rods 8, 9.

10 is a main combustion chamber, 11 is a sub-combustion chamber, 12 is a fuel injection nozzle, 13 and 14 are intake and exhaust valves, and 15 is a gear case.

FIG. 3 shows a schematic longitudinal sectional front view of the gear case 15, in which a gear 17 fixed to the crankshaft 7 on the right side and a gear 19 fixed to the intake/exhaust camshaft 18 are interlocked and connected via an idle gear 20.

A gear 17 fixed to the right crankshaft 7 and a gear 16 fixed to the left crankshaft 6 form an idle gear clutch 21.
The power can be intermittent.

The rocking arm '22 of the idle gear clutch 21 has a base end boss portion 22a pivoted to the right crankshaft 7, and a tip end portion 22b thereof which can be fixed and unfixed to the gear case 15 with a fixture 23. .

A gear locking tool 24 is fixed to the swinging arm 22.

When the idle gear clutch 21 is engaged with the left crankshaft gear 16, the output of the engine is transmitted to each of the left and right crankshafts 6,
It can be taken out from one or both of output shaft portions 6a, 7a formed at the rear end portions of 7.

Also, the idle gear clutch 21 is connected to the left crankshaft gear 1.
When the engine is stopped at the position immediately after the engagement is released from 6, the power of the engine is taken out individually from each crankshaft 6. In the operated state, the gear locking device 24 engages with the left crankshaft gear 16, locking the left crankshaft 6, left connecting rod 8 and left piston 4, so that only the right piston 5 and right crankshaft 7 can be operated. It has become.

In addition, as a modification of the above embodiment, it is possible to make a difference between the diameter of the left half and the diameter of the right half of the cylinder 1, to convert it to a two-cycle engine, to convert it to an electric ignition type engine, to convert it to an air-cooled engine. It is conceivable to convert the engine into a multi-cylinder engine with two or more cylinders.

Since the present invention is configured as described above, it has the following effects.

(a) Since the two pistons 4 and 5 are always operated in the same way due to combustion within one combustion chamber 10, there is no possibility of operational errors and vibrations caused by the inertia of both pistons 4 and 5 are accurately canceled. vibration of the entire engine is small.

(b) Since both pistons 4 and 5 are located on the same axis,
The engine width in the axial direction of the crankshafts 6 and 7 becomes smaller.

(c) Cylinder head can be omitted.

b) The need for intake and exhaust devices 13, 14, combustion devices 11, 12, etc. can be halved.

(e) Since the two crankshafts 6 and 7 can be connected via the idle gear clutch 21, it is also possible to combine the outputs from both the crankshafts 6 and 7 and take out the output from each crankshaft 6. , 7 can be freely selected.

It is also possible to make the diameter of the left half of the cylinder 1 different from the diameter of the right half so that the output of the engine can be extracted from both of the two crankshafts 6 and 7 at different ratios.

Furthermore, one piston 4 can be locked and only the other piston 5 can be operated.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, FIG. 2 is a plan view, and FIG. 3 is a longitudinal sectional front view of a gear case portion. 1...Cylinder, 2,3...Crankcase, 4.5...Piston 6,7...
...Crankshaft, 8゜9...Conrod.

Claims (1)

[Claims] 1 One crankcase 2, 3 is provided on each side of one cylinder 1, two pistons 4, 5 inserted into the cylinder 1, and each crankshaft 6 pivotally supported in each crankcase 2, 3. , 7 are connected by connecting rods 8 and 9, and the intake and exhaust camshafts 18 are configured to be driven in conjunction with one crankshaft 7, and a gear 17 is fixed to the crankshaft 7 and a gear 17 is fixed to the other crankshaft 6. The gear 16 is coupled to the idle gear clutch 21 which is swingably supported on one crankshaft 7 so that the power can be switched off and on, and a gear locking tool 24 is attached to the tip of the swinging arm 22 of the idle gear clutch 21. An opposed-piston internal combustion engine characterized in that one piston 4 is configured to be switchable between a slidable state and a fixed state with respect to the cylinder.