CYLINDER HEAD FOR DIRECT-INJECTION INTERNAL COMBUSTION ENGINE

• Main Author: OGAWA TADAO
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2015
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide a cylinder head having improved performance for mixing and vaporizing fuel direct-injected into a combustion chamber.SOLUTION: In a cylinder head 3, two intake ports 6 and one injector 15 are provided corresponding to one cylinder bore 2. The injector 15 is arranged between the two intake ports 6 so that atomized fuel is jetted toward an air flow jetted from the two intake ports 6. In the intake ports 6, air guide means are provided, respectively, for air to be jetted as swirl flows 17 from the intake ports 6 into the combustion chamber 14. The two swirl flows 17 are reversely directed to be opposed to the jetting direction of the atomized fuel. Even when the fuel is injected at a high pressure, the atomized fuel having head-on collision with the swirl flows 17 decays its momentum to promote the mixture with air and the vaporization. 【課題】燃焼室に直噴された燃料の混合性・気化性に優れたシリンダヘッドを提供する。【解決手段】シリンダヘッド３には、１つのシリンダボア２に対応して２つの吸気ポート６と１つのインジェクタ１５とを設けている。インジェクタ１５は２つの吸気ポート６の間に配置しており、霧化燃料は２つの吸気ポート６から噴出した空気流に向けて噴出する。吸気ポート６には空気の案内手段が設けられており、吸気ポート６の空気は旋回流１７として燃焼室１４に噴出する。２つの旋回流１７は、霧化燃料の噴出方向と対向するように逆向きになっている。燃料を高圧で噴射しても、霧化燃料と旋回流１７とが正面衝突するため、霧化燃料の勢いが削がれて空気との混合性・気化が促進される。【選択図】図４