The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
Sep. 06, 2000
Yumin Liu, Fussa, JP;
Kioritz Corporation, Tokyo, JP;
Abstract
The present invention relates to a four-stroke cycle internal combustion engine which is adapted to lubricate the inside of the engine using a mixed fuel composed of fuel and lubricant. The four-stroke cycle internal combustion engine includes a combustion chamber; an intake port which opens toward the combustion chamber; an air intake passage communicating with the intake port, the air intake passage having a downstream side air intake passage which is located on a downstream side of a fuel supply device for supplying the mixed fuel to the air intake passage; a crank shaft; a crank chamber accommodating the crank shaft; a branch passage branching off from the air intake passage for communicating the downstream side air intake passage of the air intake passage with the crank chamber; a valve system; a valve chamber accommodating the valve system; a communication passage for communicating the crank chamber with the valve chamber; a circulation passage for communicating the valve chamber with the air intake passage; and a valve disposed in the branch passage for opening and closing the branch passage.