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1. JP2018127972 - PISTON FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SAME

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Office
Japan
Application Number 2017022274
Application Date 09.02.2017
Publication Number 2018127972
Publication Date 16.08.2018
Publication Kind A
IPC
F02F 3/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
10having surface coverings
12on piston heads
F02B 23/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
08with positive ignition
10with separate admission of air and fuel into cylinder
F02F 3/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
F02F 3/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
10having surface coverings
CPC
F02B 23/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
08with positive ignition
10with separate admission of air and fuel into cylinder
F02F 3/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons 
10having surface coverings
12on piston heads
F02B 23/0639
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0636the combustion space having a substantially flat and horizontal bottom
0639the combustion space having substantially the shape of a cylinder
F05C 2251/048
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
2251Material properties
04Thermal properties
048Heat transfer
Y02T 10/12
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
10Road transport of goods or passengers
10Internal combustion engine [ICE] based vehicles
12Improving ICE efficiencies
F02F 2200/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
2200Manufacturing
Applicants HITACHI AUTOMOTIVE SYSTEMS LTD
日立オートモティブシステムズ株式会社
Inventors SUKEGAWA YOSHIHIRO
助川　義寛
TAKAHASHI TOMOKAZU
高橋　智一
SUGIMOTO KAZUTOMO
杉本　一等
Agents ポレール特許業務法人
Title
(EN) PISTON FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SAME
(JA) 内燃機関用ピストン及びその製造方法
front page image
Abstract
(EN)

PROBLEM TO BE SOLVED: To provide a piston for an internal combustion engine which achieves improvement of heat efficiency and reduction of emission and prevents overheating of the piston to prevent occurrence of knocking and preignition and deterioration of air charging efficiency.

SOLUTION: A piston (100) for an internal combustion engine according to the invention is a piston (100) forming a part of a combustion chamber (9) of an internal combustion engine (200) and has: a base material (103); a first film (101) provided at a part of a top surface of the base material (103) which contacts with the combustion chamber (9); and a second film (102) provided at another portion of the top surface. The first film (101) has heat conductivity and heat capacity that are smaller than those of the base material (103). The second film (102) has heat conductivity smaller than that of the base material (103) and heat capacity larger than that of the first film (101).

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2018,JPO&INPIT


(JA)

【課題】
熱効率の向上とエミッション低減を両立し、かつ、ピストンの過熱を防止してノッキング、プレイグニッションの発生及び空気充填効率の低下の防止することができる内燃機関用ピストンを提供する。
【解決手段】
本発明に係る内燃機関用ピストン（１００）は、内燃機関（２００）の燃焼室（９）の一部を構成するピストン（１００）であって、
基材（１０３）と、基材（１０３）の燃焼室（９）と接する頂面の一部分に設けられた第１の膜（１０１）と、頂面の他の部分に設けられた第２の膜（１０２）と、を有し、第１の膜（１０１）は、基材（１０３）よりも熱伝導率及び熱容量が小さく、第２の膜（１０２）は、基材（１０３）よりも熱伝導率が小さく、かつ、第１の膜（１０１）よりも熱容量が大きいことを特徴とする。
【選択図】図１
Related patent documents
WO/2018/147188
CN110268151
US20190390591
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