Title:
Combustion chamber structure of a diesel engine
Document Type and Number:
Japanese Patent JP6241479
Kind Code:
B2
Abstract:
A direct injection diesel engine (1) includes a piston (4) having a reentrant cavity (6) and a multi-hole fuel injection nozzle (7) disposed on a center line of the cavity. The cavity (6) is formed by a lip portion (42) defining a smallest diameter at a position below a piston crown surface (43) and a raised portion (41) formed at a center of the bottom and shaped like a frustum of a cone. A conical surface (41a) of the raised portion (41) is formed to have an angle pointing to a spray point (FP) of the fuel injection nozzle (7) at a piston top dead center position. The height position of a top surface (41b) is substantially equal to the height position of the lip portion (42). This structure is to promote the oxidation of soot by utilizing the air in the central part of the cavity (6).
More Like This:
| JP2014156852 | COMPRESSION IGNITION ENGINE |
Inventors:
Uehara Kazumasa
Manabu Hasegawa
Naohide Tsuji
Manabu Hasegawa
Naohide Tsuji
Application Number:
JP2015527592A
Publication Date:
December 06, 2017
Filing Date:
May 22, 2014
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02B23/06; F02F3/26
Domestic Patent References:
| JP2013160186A | ||||
| JP3032124U | ||||
| JP2000352316A | ||||
| JP63073529U |
Foreign References:
| FR2849900A1 | ||||
| DE102006027338A1 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tomioka Kiyoshi