Title:
PRECHAMBER-TYPE IGNITION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/131600
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve the ignition performance of a prechamber-type ignition device upon starting of an engine. A prechamber-type ignition device 100A is provided with a prechamber-forming member 201 forming a prechamber 109 accommodating a plug electrode 203 portion of an ignition plug 110, and a passageway (injection hole) 204 communicating with a main combustion chamber (engine main chamber) 104 of an internal combustion engine. The prechamber-forming member 201 includes a first region 303 embedded in a cylinder head 102, and a second region 302 protruding into the main combustion chamber 104. The prechamber-type ignition device 100A is further provided with a heat-shield material (first heat-shield material) 307 on an inner surface (inner-peripheral surface) 303A of only the first region 303, the heat-shield material 307 having a heat conductivity smaller than that of the material of the prechamber-forming member 201.
Inventors:
HOSAKA TOMOYUKI (JP)
MITSUFUJI KENTA (JP)
OOHATA EIICHIROU (JP)
ISHII EIJI (JP)
MITSUFUJI KENTA (JP)
OOHATA EIICHIROU (JP)
ISHII EIJI (JP)
Application Number:
PCT/JP2020/045179
Publication Date:
July 01, 2021
Filing Date:
December 04, 2020
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02P13/00; F02B19/12; F02B19/16; F02F1/24; F02P5/15
Domestic Patent References:
| WO2016057556A1 | 2016-04-14 |
Foreign References:
| JPS5675970A | 1981-06-23 | |||
| JP2006177249A | 2006-07-06 | |||
| JPH08284665A | 1996-10-29 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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