公开(公告)号：US08151762B2

公开(公告)日：2012-04-10

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： F02B19/04

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：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：US07051693B2

公开(公告)日：2006-05-30

申请号：US10992660

申请日：2004-11-22

申请人： Masayuki Tetsuno ,  Junichi Taga ,  Takanori Sugiyama ,  Hideki Hosoya ,  Yoshiteru Nakayama ,  Keiji Araki

发明人： Masayuki Tetsuno ,  Junichi Taga ,  Takanori Sugiyama ,  Hideki Hosoya ,  Yoshiteru Nakayama ,  Keiji Araki

IPC分类号： F02N17/00

CPC分类号： F02N99/006 ,  F02D41/042 ,  F02D41/065 ,  F02D41/123 ,  F02N11/0814 ,  F02N11/0844 ,  F02N19/005 ,  F02N2019/007 ,  F02N2200/021 ,  F02N2200/022 ,  Y02T10/48

摘要： When an engine restart request is given in an engine stopping period which begins at a point of fuel supply interruption and ends at a point of complete engine stop, an engine starting system judges whether TDC engine speed detected immediately before is equal to or lower than a specific value “A”, the counted number of reverse running motions of the engine is 0, and a piston in an expansion stroke cylinder is relatively close to TDC. If the judgment result is in the affirmative with all these conditions satisfied, the engine starting system injects fuel into the expansion stroke cylinder and then ignites and combusts a mixture produced therein. The engine starting system also injects the fuel into a compression stroke cylinder and then ignites and combusts a mixture produced therein when a piston in the compression stroke cylinder has gone beyond TDC.

摘要翻译： 当在发动机停止期间给出发动机重启请求时，发动机停止期间从燃料供应中断点开始并在发动机停止完成时结束，发动机起动系统判断紧接在前面检测的TDC发动机转速是否等于或低于 特定值“A”，发动机的反转运动的计数次数为0，膨胀冲程缸中的活塞相对接近TDC。 如果在满足所有这些条件的情况下判断结果是肯定的，则发动机起动系统将燃料喷射到膨胀冲程缸中，然后点燃并燃烧其中产生的混合物。 发动机起动系统还将燃料喷射到压缩冲程气缸中，然后当压缩冲程气缸中的活塞超过TDC时点燃并燃烧其中产生的混合物。

公开(公告)号：US20050109302A1

公开(公告)日：2005-05-26

申请号：US10992660

申请日：2004-11-22

申请人： Masayuki Tetsuno ,  Junichi Taga ,  Takanori Sugiyama ,  Hideki Hosoya ,  Yoshiteru Nakayama ,  Keiji Araki

发明人： Masayuki Tetsuno ,  Junichi Taga ,  Takanori Sugiyama ,  Hideki Hosoya ,  Yoshiteru Nakayama ,  Keiji Araki

IPC分类号： F02D41/04 ,  F02D41/06 ,  F02D41/12 ,  F02N11/08 ,  F02N99/00 ,  F02N17/00

CPC分类号： F02N99/006 ,  F02D41/042 ,  F02D41/065 ,  F02D41/123 ,  F02N11/0814 ,  F02N11/0844 ,  F02N19/005 ,  F02N2019/007 ,  F02N2200/021 ,  F02N2200/022 ,  Y02T10/48

摘要： When an engine restart request is given in an engine stopping period which begins at a point of fuel supply interruption and ends at a point of complete engine stop, an engine starting system judges whether TDC engine speed detected immediately before is equal to or lower than a specific value “A”, the counted number of reverse running motions of the engine is 0, and a piston in an expansion stroke cylinder is relatively close to TDC. If the judgment result is in the affirmative with all these conditions satisfied, the engine starting system injects fuel into the expansion stroke cylinder and then ignites and combusts a mixture produced therein. The engine starting system also injects the fuel into a compression stroke cylinder and then ignites and combusts a mixture produced therein when a piston in the compression stroke cylinder has gone beyond TDC.

摘要翻译： 当在发动机停止期间给出发动机重启请求时，发动机停止期间从燃料供应中断点开始并在发动机停止完成时结束，发动机起动系统判断紧接在前面检测的TDC发动机转速是否等于或低于 特定值“A”，发动机的反转运动的计数次数为0，膨胀冲程缸中的活塞相对接近TDC。 如果在满足所有这些条件的情况下判断结果是肯定的，则发动机起动系统将燃料喷射到膨胀冲程缸中，然后点燃并燃烧其中产生的混合物。 发动机起动系统还将燃料喷射到压缩冲程气缸中，然后当压缩冲程气缸中的活塞超过TDC时点燃并燃烧其中产生的混合物。