Title:
ディーゼルエンジン
Document Type and Number:
Japanese Patent JP6830045
Kind Code:
B2
Abstract:
To provide a diesel engine improved in thermal efficiency in indirect injection by minimizing a larger heat loss than direct injection by devising surface treatment of each combustion chamber.SOLUTION: In a diesel engine, a main combustion chamber 9 and an auxiliary chamber 6 of the engine communicate with each other through an injection hole 8 formed in an eccentric portion of the main combustion chamber 9, where a surface roughness Ra1 in an injected portion 20 of injection fuel in the auxiliary chamber 6 is set to be 0.3 μm or less (Ra1≤0.3 μm). A ceramic coating s is applied to a surface of a portion 21 other than the injected portion 20 in an auxiliary chamber-forming mouthpiece 4 for forming the auxiliary chamber 6.SELECTED DRAWING: Figure 2
Inventors:
Hideyuki Koyama
Yo Tanaka
Yoshinori Tanaka
Takashi Yamaguchi
Rina Kaneko
Mountain Saki Takahiro
Yo Tanaka
Yoshinori Tanaka
Takashi Yamaguchi
Rina Kaneko
Mountain Saki Takahiro
Application Number:
JP2017134067A
Publication Date:
February 17, 2021
Filing Date:
July 07, 2017
Export Citation:
Assignee:
Kubota Corporation
International Classes:
F02B19/16; F02F3/10; F02F3/12; F16J1/01
Domestic Patent References:
| JP56023517A | ||||
| JP7259565A | ||||
| JP2015094292A | ||||
| JP51110118A |
Attorney, Agent or Firm:
Shoji Suzue