PISTON FOR CYLINDER FUEL INJECTION TYPE INTERNAL COMBUSTION ENGINE

Title:

PISTON FOR CYLINDER FUEL INJECTION TYPE INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JPH10325327

Kind Code:

A

Abstract:

To preserve tumble flow and swirl flow which flows a top part of a piston without weakening so as to improve a toque by improving combustion.

A projection part 21 of a top surface of a piston 4 is composed of an intake valve side inclining surface 22 and an exhaust valve side inclining surface 23 which are arranged in parallel with an inclining surface of a Penthouse-roof type combustion chamber of a cylinder head side, and a pair of circular cone shaped side surfaces 24, 25 formed in a circular cone surface which is slantly inclined concentrically with an outer circle of the piston 4, and a cavity combustion chamber 12 is recesped-arranged eccentrically so as to cover the almost of the intake valve side inclining surface 22. Nearly crescent intake valve side horizontal surface 26 and exhaust valve side horizontal surface 27 are formed on an outside of the intake valve side inclining surface 22 and the exhaust valve side inclining surface 23. Tumble flow and swirl flow are guided smoothly by the circular cone shaped side surfaces 24, 25, and are preserved in a good condition.

Inventors:

TANIYAMA TAKESHI
JINGU YOSHIHISA
MASUDA GOJI

Application Number:

JP13736897A

Publication Date:

December 08, 1998

Filing Date:

May 28, 1997

Export Citation:

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Assignee:

NISSAN MOTOR

International Classes:

F02B17/00; F02B23/08; F02B23/10; F02F3/26; F02F3/28; F02B75/12; (IPC1-7): F02B23/10; F02B17/00; F02B23/08; F02F3/26; F02F3/28

Attorney, Agent or Firm:

Fujiya Shiga (2 outside)

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