RECIPROCATING ENGINE - BANDO KIKO CO

Title:

RECIPROCATING ENGINE

Document Type and Number:

WIPO Patent Application WO/2008/047453

Kind Code:

A1

Abstract:

A reciprocating engine, wherein, in a piston comprising a piston upper body consisting of a crown portion receiving combustion pressure and a land portion to which a piston ring is attached, and a skirt portion formed on the underside of the piston upper body, the piston upper body is formed while being deviated from the center line of the piston to the anti-thrust side where the outer circumferential surface of the piston upper body and the outer circumferential surface at the maximum diameter part of the skirt portion are formed while being arranged on a vertical line, a gap appears between the outer circumferential surface of the piston upper body and the inner surface of the cylinder on the thrust side, a gas chamber is formed in a second land portion between first and second piston rings attached to the outer circumferential surface of the piston upper body, a plurality of recesses are formed in the upper part of the inner surface of the cylinder on the thrust side, and, when the piston is located at the top dead center or in the vicinity thereof, high pressure gas above the piston is fed into the annular gas chamber through the recess and the piston is supported by the high pressure gas fed into the gas chamber from the thrust side.

Inventors:

BANDO SHIGERU (JP)

Application Number:

PCT/JP2006/320972

Publication Date:

April 24, 2008

Filing Date:

October 20, 2006

Export Citation:

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Assignee:

BANDO KIKO CO (JP)
BANDO SHIGERU (JP)

International Classes:

F02F1/18; F02F3/00; F02F3/28

Domestic Patent References:

WO1992002722A1

1992-02-20

Foreign References:

JPH04347352A	1992-12-02
JPH0637542U	1994-05-20
JPH04347352A	1992-12-02
JPH0526106A	1993-02-02
JP2988010B2	1999-12-06

Other References: