Title:
Compression ignition type internal-combustion engine
Document Type and Number:
Japanese Patent JP6044712
Kind Code:
B2
Abstract:
A compression ignition internal combustion engine includes: a cylinder block and a cylinder head; a piston including a cavity that defines a combustion chamber in cooperation with the cylinder block and the cylinder head; and a nozzle for injecting fuel into the combustion chamber, wherein the cavity includes: a raised portion raised toward the nozzle; a bottom surface formed around the raised portion; and an open surface and a reentrant surface that are continuous to the bottom surface, a depth of the open surface becomes shallower toward a radially outer side of the piston, a distance from the nozzle to the open surface is greater than a distance from the nozzle to the reentrant surface, a height position, in a central axis direction of the piston, of a ridgeline between the bottom surface and the open surface is lower than a height position, in the central axis direction of the piston, of a ridgeline between the bottom surface and the reentrant surface, and the nozzle injects first and second fuel sprays toward the open surface and the reentrant surface, respectively.
Inventors:
Tomoyuki Ono
Application Number:
JP2015522443A
Publication Date:
December 14, 2016
Filing Date:
June 20, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02B23/06; F02B21/02; F02B23/10; F02F3/26
Domestic Patent References:
| JPH08296442A | 1996-11-12 | |||
| JPH0469635U | 1992-06-19 | |||
| JPS5725117U | 1982-02-09 | |||
| JP2011185242A | 2011-09-22 | |||
| JP2005194971A | 2005-07-21 | |||
| JP2002048001A | 2002-02-15 | |||
| JP2004084618A | 2004-03-18 |
Foreign References:
| EP0261538A2 | 1988-03-30 |
Attorney, Agent or Firm:
Shuhei Katayama