Assembly for direct connection of internal combustion engine and

Details Assembly for direct connection of internal combustion engine and Assembly for direct connection of internal combustion engine and

1998-10-29

2000-02-15

McMahon, Marguerite

Internal-combustion engines

Transmission mechanism from piston

1231974, F02B 7524

Patent

active

060240679

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention is intended to connect a various kinds of movable bodies reciprocating in linear fashion, such as a piston of a compressor, directly to a piston of an internal combustion engine, so as to cause the movable bodies to be driven.


BACKGROUND OF THE INVENTION

A crank device is known in the art as a means for performing power conversion between reciprocating motion and rotational motion in an internal combustion engine or a compressor. It is noted, however, that such a crank device presents loss in efficiency of power conversion, since a connecting rod coupling a piston and a crankshaft is always inclined relative to the cylinder axis except when the connecting rod is at the top dead center or the bottom dead center of the piston. It is also noted that a phenomenon called "piston slap" is caused in which the piston rubs against the inner wall of the cylinder due to a lateral component of force applied from the connecting rod to the piston as a reaction force. This causes vibration, noise and wearing.
It is noted, however, that employment of prior art crank device is unavoidable when it is intended to drive a driven machine including a movable body reciprocating in linear fashion, such as a piston of a compressor, using an internal combustion engine as a power source. FIG. 4 illustrates three types of coupling mechanisms between an internal combustion engine E and a compressor C. In FIGS. 4(a) and (b), each of the internal combustion engine E and the compressor C includes a crank device. In the coupling mechanism shown in FIG. 4(a), a rotational motion is transmitted by means of pulleys 50a and 50b and a belt 51. In the coupling mechanism shown in FIG. 4(b), a rotational motion is transmitted by means of a coupling 52. In the coupling mechanism shown in FIG. 4(c), a common crank device 53 is disposed at a position where the cylinder axes of the engine E and the compressor C intersect with each other. In this case, the internal combustion engine E and the compressor C share a common crank pin 54.
The above-mentioned three coupling mechanisms all present significant loss during power conversion, since they employ a crank device.
In order to eliminate the disadvantages in prior art crank device mentioned above, the inventors have proposed a new crank device based on a new concept (Japanese Patent Application No. 6-121776 (Hei-6-121776). According to the new crank device, a planetary gear mechanism is interposed between a connecting rod and a crankshaft, so as to allow lateral amplitude caused at the lower end of the connecting rod in response to rotation of crankshaft to be accommodated by the planetary gear mechanism. By this, the connecting rod is always moved up and down along the cylinder axes, without causing any rocking motions, whereby efficiency in power conversion may be increased and undesirable phenomenon of piston slap may be eliminated.


SUMMARY OF THE INVENTION

It is an object of the invention to suitably apply the new crank device, so as to connect a various kinds of movable bodies reciprocating in linear fashion, such as a piston of a compressor, directly to a piston of an internal combustion engine, for achieving efficient power transmission.
In order to achieve the above-mentioned object, an assembly of an internal combustion engine and a driven machine directly coupled with each other according to the invention comprises: linear fashion and a driven machine having a movable body capable of reciprocating in linear fashion, the piston of the internal combustion engine and the movable body of the driven machine being arranged in alignment with each other along a rectilinear line; intermediate the internal combustion engine and the driven machine on the rectilinear line; its center and for revolution around the center of the internal sun gear, the planetary gear having a pitch circle diameter half that of the internal sun gear; central portion for rotation about its center and a shank supported for rotation about the center O so as to allow revolution of the

REFERENCES:
patent: 3886805 (1975-06-01), Koderman
patent: 4026252 (1977-05-01), Wrin
patent: 5394839 (1995-03-01), Haneda
patent: 5465648 (1995-11-01), Cy
patent: 5799636 (1998-09-01), Fish

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