公开(公告)号：US20100175660A1

公开(公告)日：2010-07-15

申请号：US12504445

申请日：2009-07-16

申请人： Toshiaki NISHIMOTO ,  Tomomi WATANABE ,  Yoshiteru NAKAYAMA ,  Tatsuya FUJIKAWA ,  Masahisa YAMAKAWA

发明人： Toshiaki NISHIMOTO ,  Tomomi WATANABE ,  Yoshiteru NAKAYAMA ,  Tatsuya FUJIKAWA ,  Masahisa YAMAKAWA

IPC分类号： F02B5/00 ,  F02M69/04

CPC分类号： F02B23/104 ,  F02B2023/103 ,  Y02T10/125

摘要： Disclosed is a direct-injection spark-ignition engine designed to promote catalyst activation during cold engine operation. A fuel injection timing for a fuel injection period in an compression stroke (second fuel injection period F2) is set to allow a first fuel spray Ga injected from a first spray hole 40a to enter a cavity 34 in a piston crown surface 30, and allow a second fuel spray Gb to impinge against a region of the piston crown surface 30 located closer to an injector than the cavity 34, so as to cause the second fuel spray Gb having a lowered penetration force due to the impingement to be pulled toward the cavity 34 by a negative pressure generated in the cavity 34 as a result of passing of the first fuel spray Ga therethrough. The direct-injection spark-ignition engine can maximally hold an injected fuel spray around a spark plug to reliably stabilize a combustion state in a combustion mode for promoting catalyst activation during cold engine operation, while enhancing combustion efficiency in a homogenous combustion mode during normal engine operation.

摘要翻译： 公开了一种直喷式火花点火发动机，设计用于在冷发动机运行期间促进催化剂活化。 在压缩行程（第二燃料喷射期间F2）中的燃料喷射期间的燃料喷射正时被设定为允许从第一喷射孔40a喷射的第一燃料喷雾Ga进入活塞冠表面30中的空腔34，并且允许 第二燃料喷雾Gb撞击位于比腔34更靠近喷射器的活塞冠表面30的区域，以便使得由于冲击而具有降低的穿透力的第二燃料喷雾Gb被拉向空腔 34由于第一燃料喷雾Ga通过而在空腔34中产生的负压。 直喷式火花点火发动机可以最大限度地保持火花塞周围的喷射燃料喷雾，以在燃烧模式下可靠地稳定燃烧状态，以促进冷机发动机运行期间的催化剂活化，同时在正常发动机中提高均质燃烧模式下的燃烧效率 操作。

公开(公告)号：US20090173312A1

公开(公告)日：2009-07-09

申请号：US12347705

申请日：2008-12-31

申请人： Toshiaki NISHIMOTO ,  Masahisa YAMAKAWA ,  Takashi YOUSO ,  Tatsuya FUJIKAWA

发明人： Toshiaki NISHIMOTO ,  Masahisa YAMAKAWA ,  Takashi YOUSO ,  Tatsuya FUJIKAWA

IPC分类号： F02B5/00

CPC分类号： F02B23/104 ,  F02B17/005 ,  F02B23/0675 ,  F02B2075/125 ,  Y02T10/123 ,  Y02T10/125

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20090173307A1

公开(公告)日：2009-07-09

申请号：US12346976

申请日：2008-12-31

申请人： Takashi YOUSO ,  Toshiaki NISHIMOTO ,  Masahisa YAMAKAWA ,  Tatsuya FUJIKAWA

发明人： Takashi YOUSO ,  Toshiaki NISHIMOTO ,  Masahisa YAMAKAWA ,  Tatsuya FUJIKAWA

IPC分类号： F01L3/00

CPC分类号： F02B23/08 ,  F02B23/104 ,  Y02T10/125

摘要： 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.

摘要翻译： 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）被设计成在阀重叠期间（T）的中心定时（Tc）满足条件表达式S1> = S2，其中S1是燃烧室（4）的横截面面积， 沿着平行于进气门和排气门（1,2）中的至少一个的直线往复运动方向（d1或d2）延伸并通过的多个相互平行的假想切割平面（IP）中的任何一个选择的一个， 通过阀（1,2）中的至少一个阀的阀头（1a或2a）和S2是限定在阀头（1a或2a）和对应的阀座（11a或12a）之间的有效开口面积， 在相对于所选择的假想切割平面（IP）的燃烧室（4）的外侧的区域中。 本发明可以可靠地提高燃气清除效率和进气充气效率。