JP2014231781A - Reciprocal engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize torque fluctuations generated by reciprocation mass of a piston, etc. to increase the output torque.SOLUTION: A reciprocal engine 10 includes: a crank shaft 11 rotated by reciprocating-motion of a piston; a fly wheel 12 disposed in the crank shaft 11; and a one-way clutch 13 which is provided between the crank shaft 11 and the fly wheel 12 and transmits only rotation torque of the crank shaft 11 in a forward direction to the fly wheel 12.

Description

  The present invention relates to a reciprocating engine.

  The reciprocating engine converts the heat energy generated by the combustion of fuel into the reciprocating motion of the piston, and further extracts the reciprocating motion of the piston as the rotational motion of the crankshaft. As a power source for vehicles, ships, stationary generators, etc. Widely used.

JP 2000-97060 A

  By the way, in the case of the reciprocating engine as described above, a torque fluctuation due to a reciprocating mass of a piston or the like naturally occurs. FIG. 2 (a) shows an example of torque fluctuation (constant engine rotation) caused by reciprocating mass of a piston or the like in a general reciprocating engine. As can be seen from FIG. 2 (a), the average value of this torque is zero, and is not used at all effectively.

  Accordingly, an object of the present invention is to provide a reciprocating engine capable of increasing output torque by effectively utilizing torque fluctuation caused by reciprocating mass of a piston or the like.

  In order to achieve the above-described object, a reciprocating engine according to the present invention includes a crankshaft rotated by a reciprocating motion of a piston, a flywheel disposed on the crankshaft, and the crankshaft and the flywheel. A one-way clutch that is provided in between and transmits only the rotational torque in the positive direction of the crankshaft to the flywheel.

  The one-way clutch may include an inner ring attached to the crankshaft, an outer ring attached to the flywheel, and a torque transmission member provided between the inner ring and the outer ring.

  The reciprocating engine according to the present invention has an excellent effect that the output torque can be increased by effectively using the torque fluctuation caused by the reciprocating mass of the piston or the like.

1 is a schematic plan view of a reciprocating engine according to an embodiment of the present invention. It is explanatory drawing of the torque fluctuation | variation produced by reciprocating mass, such as a piston. It is explanatory drawing of the increase torque by the reciprocating engine which concerns on one Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  A reciprocating engine (hereinafter simply referred to as an engine) 10 shown in FIG. 1 is an in-line four-cylinder diesel engine. The engine 10 is not limited to an in-line four-cylinder engine, and may be a multi-cylinder engine other than four cylinders or a single-cylinder engine.

  A piston is connected to the crankshaft 11 of the engine 10 via a connecting rod, and the reciprocating motion of the piston is transmitted to the crankshaft 11 via the connecting rod. The crankshaft 11 is provided with a flywheel 12 through which the rotational motion of the crankshaft 11 is transmitted to a clutch, a transmission, and the like. That is, the flywheel 12 also functions as a clutch plate that transmits power to the clutch. Further, a one-way clutch 13 is provided between the crankshaft 11 and the flywheel 12.

  The one-way clutch 13 transmits only the rotational torque in the positive direction of the crankshaft 11 to the flywheel 12. On the other hand, the one-way clutch 13 does not transmit the rotational torque in the reverse direction of the crankshaft 11 to the flywheel 12. The one-way clutch 13 includes an inner ring (not shown) attached to the crankshaft 11, an outer ring (not shown) attached to the flywheel 12, and a torque transmission member (shown between the inner ring and the outer ring). (Not shown). As the one-way clutch 13, for example, a roller type or a ratchet type can be used.

  Next, the effect by the engine 10 which concerns on this embodiment is demonstrated.

  In the case of the engine 10 according to the present embodiment, torque fluctuation (constant engine rotation) caused by the reciprocating mass of a piston or the like is shown in FIG. By providing the one-way clutch 13 between the crankshaft 11 and the flywheel 12, a negative component of torque fluctuation caused by the reciprocating mass of the piston or the like is not transmitted from the crankshaft 11 to the flywheel 12. Thereby, as can be seen from FIG. 2 (b), only the positive component of the torque fluctuation caused by the reciprocating mass of the piston or the like is transmitted from the crankshaft 11 to the flywheel 12, and the average value of this torque is zero. It becomes a positive value. As a result, the output torque increases by the average value of the torque (see FIG. 3).

  Therefore, according to the engine 10 according to the present embodiment, the torque fluctuation caused by the reciprocating mass of the piston or the like can be used effectively, and the output torque can be increased.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various other embodiments can be adopted.

  For example, the engine 10 is not limited to a diesel engine, and the present invention can be widely applied to other engines such as a gasoline engine.

10 Reciprocating engine 11 Crankshaft 12 Flywheel 13 One-way clutch

Claims (2)

A crankshaft rotated by a reciprocating motion of the piston;
A flywheel disposed on the crankshaft;
A reciprocating engine comprising: a one-way clutch that is provided between the crankshaft and the flywheel and transmits only the rotational torque in the positive direction of the crankshaft to the flywheel.   The reciprocating apparatus according to claim 1, wherein the one-way clutch includes an inner ring attached to the crankshaft, an outer ring attached to the flywheel, and a torque transmission member provided between the inner ring and the outer ring. engine.

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