Title:
COMPRESSION SELF-IGNITION INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020007977
Kind Code:
A
Abstract:
To provide a compression self-ignition internal combustion engine that includes a passage wall portion of a flow straightening passage through which a fuel injected from a nozzle hole of a fuel injection nozzle or an in-cylinder gas passes, and that achieves both securing of the reliability of shape retention of the passage wall portion and suppressing of a rise in wall surface temperature of the flow straightening passage.SOLUTION: A compression self-ignition internal combustion engine 10 includes a fuel injection nozzle 20 having a nozzle hole 22 that is formed in a tip end portion 20a exposed in a combustion chamber 12, and a passage forming member (a duct 30) forming a flow straightening passage 32 through which a fuel injected from the nozzle hole 22 passes. The passage forming member includes a passage wall portion 36 located radially outward of the flow straightening passage 32. The passage wall portion 36 includes a first layer 36a that is a base portion connected to a cylinder head 18, and a second layer 36b located radially outward of the first layer 36a. The toughness of the first layer 36a is higher than the toughness of the second layer 36b, and the thermal conductivity of the second layer 36b is lower than the thermal conductivity of the first layer 36a.SELECTED DRAWING: Figure 2
Inventors:
TANNO SHIRO
KAWAI KIN
KAWAI KIN
Application Number:
JP2018129991A
Publication Date:
January 16, 2020
Filing Date:
July 09, 2018
Export Citation:
Assignee:
TOYOTA MOTOR CORP
TOYOTA IND CORP
TOYOTA IND CORP
International Classes:
F02M61/18; F02F1/24; F02M63/00; F02M69/04
Domestic Patent References:
| JP2004308449A | 2004-11-04 | |||
| JP2006307825A | 2006-11-09 | |||
| JPH055415A | 1993-01-14 | |||
| JP2017155639A | 2017-09-07 | |||
| JP2012047134A | 2012-03-08 |
Foreign References:
| WO2018101991A1 | 2018-06-07 | |||
| US20010012196A1 | 2001-08-09 | |||
| US20170350308A1 | 2017-12-07 |
Attorney, Agent or Firm:
Hideki Takahashi
Mamoru Takada
Hidekazu Onishi
Mamoru Takada
Hidekazu Onishi