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    • 5. 发明授权
    • Internal combustion engine
    • 内燃机
    • US07650872B2
    • 2010-01-26
    • US12347705
    • 2008-12-31
    • Toshiaki NishimotoMasahisa YamakawaTakashi YousoTatsuya Fujikawa
    • Toshiaki NishimotoMasahisa YamakawaTakashi YousoTatsuya Fujikawa
    • F02F3/26
    • F02B23/104F02B17/005F02B23/0675F02B2075/125Y02T10/123Y02T10/125
    • Disclosed is an internal combustion engine, which has a geometric compression ratio of 13.0 or greater, and a combustion chamber (4) configured to satisfy a condition of S/V2≦0.12 (mm−1) when a radius r of a hypothetical sphere (IS) with its center at an ignition point (CP) of a spark plug (3) is set to satisfy a condition of V2=0.15×V1, where: S (mm2) is an area of an interference surface between the hypothetical sphere (IS) and an inner wall of the combustion chamber (4) in a state when a piston (30) is at its top dead center position; V1 (mm3) is a volume of the combustion chamber 4 in the state when the piston (30) is at the top dead center position; and V2 (mm3) is a volume of a non-interference part of the hypothetical sphere (IS) which is free of interference with the inner wall of the combustion chamber (4) when the piston (30) is at the top dead center position. The internal combustion engine of the present invention can more reliably improve fuel economy.
    • 本发明公开了一种几何压缩比为13.0以上的内燃机和构成为满足S / V2 <= 0.12(mm-1)的条件的燃烧室(4),当假想球体的半径r (IS),其中心位于火花塞(3)的点火点(CP)处以满足V2 = 0.15×V1的条件,其中:S(mm2)是假想球体 IS)和燃烧室(4)的内壁处于活塞(30)处于其上止点位置的状态; V1(mm3)是当活塞(30)处于上止点位置时的燃烧室4的容积; 而V2(mm3)是当活塞(30)处于上死点位置时,与燃烧室(4)的内壁不相干的假想球(IS)的非干涉部分的体积 。 本发明的内燃机能够更可靠地提高燃油经济性。
    • 9. 发明授权
    • Internal combustion engine
    • 内燃机
    • US08191528B2
    • 2012-06-05
    • US12346976
    • 2008-12-31
    • Takashi YousoToshiaki NishimotoMasahisa YamakawaTatsuya Fujikawa
    • Takashi YousoToshiaki NishimotoMasahisa YamakawaTatsuya Fujikawa
    • F02F3/00F02F1/42
    • F02B23/08F02B23/104Y02T10/125
    • Disclosed is an internal combustion engine (A), which has a valve overlap period (T) during which an intake valve (1) and an exhaust valve (2) are opened, and a geometric compression ratio of 13.0 or greater. The engine (A) is designed to satisfy, at a center timing (Tc) of the valve overlap period (T), a conditional expression: S1≧S2, where S1 is a cross-sectional area of a combustion chamber (4) taken along any selected one of a plurality of mutually parallel hypothetical cutting-planes (IP) each of which extends parallel to a linear reciprocating direction (d1 or d2) of at least one of the intake and exhaust valves (1, 2) and passes through a valve head (1a or 2a) of the at least one of the valves (1, 2), and S2 is an effective opening area defined between the valve head (1a or 2a) and a corresponding valve seat (11a or 12a) in a region on an outward side of the combustion chamber (4) relative to the selected hypothetical cutting-plane (IP). The present invention can reliably improve combusted-gas scavenging efficiency and intake-air charging efficiency.
    • 公开了一种内燃机(A),其具有打开进气门(1)和排气阀(2)的气门重叠期(T),并且几何压缩比为13.0以上。 发动机(A)被设计成在阀重叠周期(T)的中心定时(Tc)满足条件表达式:S1≥S2,其中S1是所采用的燃烧室(4)的横截面面积 沿着平行于所述进气门和排气门(1,2)中的至少一个的直线往复运动方向(d1或d2)延伸的多个相互平行的假想切割平面(IP)中的任何一个选定的一个,并且通过 所述阀(1,2)和所述至少一个阀(S2)的阀头(1a或2a)是限定在所述阀头(1a或2a)和相应的阀座(11a或12a)之间的有效开口区域 相对于所选择的假想切割平面(IP)在燃烧室(4)的外侧的区域。 本发明可以可靠地提高燃气清除效率和进气充气效率。