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1. 发明授权

US4221198A Internal combustion engine with sustained power stroke 失效
标题翻译：具有持续动力冲程的内燃机
公开(公告)号：US4221198A
公开(公告)日：1980-09-09
申请号：US948729
申请日：1978-10-05
申请人： Robert J. McNair, Jr.
发明人： Robert J. McNair, Jr.
IPC分类号： F02B21/00 , F02B75/02 , F02B19/16
CPC分类号： F02B21/00 , F02B2075/027
摘要： A four stroke cycle internal combustion engine is presented having a sustained power stroke which results from a delayed mixing of a stratified charge. Use of delayed mixing of an overall stoichiometric air-fuel mixture results in formation of a low amount of the oxides of nitrogen. Delayed mixing of the stratified charge is achieved by placement of at least one Helmholtz resonator cavity in the head or closed end of each combustion chamber. The Helmholtz resonator cavity communicates with the top end of the main combustion chamber via a narrow slot. On the intake stroke of each engine cylinder, the main chamber is filled with a slightly fuel rich gaseous charge while the companion Helmholtz resonator cavity is filled with air. During the compression stroke some of the rich air-fuel mixture is forced into the resonator cavity via the communicating slot. At or near TDC, the air-fuel mixture in the main chamber is ignited. As the flame front progresses across the chamber a rapid increase in pressure serves not only to power the piston, but also to initiate a resonant reaction in the Helmholtz resonator cavity which results in a transfer of the unburned gases therein into the main combustion chamber. This both sustains the power stroke and at the same time lowers the peak flame temperature in the main chamber.
摘要翻译：呈现四冲程循环内燃机具有持续的动力冲程，其由分层装料的延迟混合产生。使用总体化学计量空气 - 燃料混合物的延迟混合导致形成少量的氮氧化物。通过将至少一个亥姆霍兹谐振腔放置在每个燃烧室的头部或封闭端中来实现分层电荷的延迟混合。亥姆霍兹共振腔通过窄槽与主燃烧室的顶端连通。在每个发动机气缸的进气冲程中，主室充满稍微富含燃料的气体，而伴随的亥姆霍兹共振腔充满空气。在压缩冲程期间，一些富空燃混合物经由连通槽被迫进入谐振腔。在TDC或其附近，主室中的空气 - 燃料混合物被点燃。当火焰前沿进入室时，压力的快速增加不仅用于为活塞提供动力，而且还用于启动亥姆霍兹共振腔中的共振反应，这导致其中未燃烧的气体进入主燃烧室。这同时维持动力行程，同时降低主室中的峰值火焰温度。

2. 发明授权

US4370959A Two stroke cycle engine with sustained power stroke 失效
标题翻译：具有持续动力冲程的两冲程循环发动机
公开(公告)号：US4370959A
公开(公告)日：1983-02-01
申请号：US154744
申请日：1980-05-30
申请人： Robert J. McNair, Jr.
发明人： Robert J. McNair, Jr.
IPC分类号： F02B1/04 , F02B17/00 , F02B75/02 , F02F3/28
CPC分类号： F02F3/28 , F02B17/005 , F02B1/04 , F02B2075/025 , F02B2275/40 , Y02T10/125
摘要： A two-stroke cycle internal combustion engine has a sustained power stroke which results from delayed mixing of a stratified charge. Use of delayed mixing of an overall stoichiometric air-fuel mixture results in formation of a low amount of the oxides of nitrogen. Delayed mixing of a stratified charge is achieved by placement of a Helmholtz resonator cavity in the piston and peripherally just below the crown thereof. The Helmholtz resonator cavity communicates with the combustion chamber via a narrow slot made by undercutting the top edge of the piston. A port type intake valve is used. Pressurized air passing through the intake port during the exhaust phase of the cycle streams past the undercut top edge of the piston. After the engine cylinder has received a charge of fresh air the compression stroke is begun and the main chamber is filled with a slight fuel-rich gaseous charge. The companion Helmholtz resonator cavity receives only an air charge from the intake port. During the compression stroke some of the fuel-rich mixture is forced into the resonator cavity via the communicating slot. However, even at maximum compression the air-fuel mixture within the cavity remains lean. At or near TDC, the air-fuel mixture in the main chamber is ignited. As the flame front progresses across the chamber, a rapid increase in pressure serves not only to power the piston, but also to initiate a resonant reaction in the Helmholtz resonator cavity. This results in a transfer of the unburned gases therein into the main chamber, thereby sustaining the power stroke over a longer period than would occur when operating on a conventional Otto cycle.
摘要翻译：二冲程循环内燃机具有持续的功率冲程，这是由分层电荷的延迟混合引起的。使用总体化学计量空气 - 燃料混合物的延迟混合导致形成少量的氮氧化物。分层电荷的延迟混合是通过将亥姆霍兹谐振腔放置在活塞中并在周边刚好在其顶部下方来实现的。亥姆霍兹谐振腔通过一个狭窄的槽与燃烧室连通，该狭缝通过底切活塞的顶部边缘而形成。使用端口型进气阀。在循环的排气阶段通过进气口的加压空气流过活塞的底切顶部边缘。在发动机气缸已经接收到新鲜空气的充电之后，开始压缩行程，并且主室充满少量富含燃料的气体装料。伴随的亥姆霍兹谐振腔只能从进气口接收空气。在压缩冲程期间，一些富燃料混合物经由连通槽被迫进入谐振腔。然而，即使在最大压缩下，空腔内的空气 - 燃料混合物仍然很瘦。在TDC或其附近，主室中的空气 - 燃料混合物被点燃。随着火焰前沿进入腔室，压力的快速增加不仅用于为活塞供电，而且还用于在亥姆霍兹共振腔中启动共振反应。这导致其中未燃烧气体转移到主室中，从而在比常规奥托循环操作时更长的时间段内维持动力冲程。

3. 发明授权

US4167930A Internal combustion engine with sustained power stroke 失效
标题翻译：具有持续动力冲程的内燃机
公开(公告)号：US4167930A
公开(公告)日：1979-09-18
申请号：US927214
申请日：1978-07-24
申请人： Robert J. McNair, Jr.
发明人： Robert J. McNair, Jr.
IPC分类号： F02B21/00 , F02B75/02 , F02B23/00 , F02M27/00
CPC分类号： F02B21/00 , F02B2075/027 , Y10S123/04
摘要： A four stroke cycle internal combustion engine is presented having a sustained power stroke which results from a delayed mixing of a stratified charge. Use of delayed mixing of an overall stoichiometric air-fuel mixture results in formation of a low amount of the oxides of nitrogen. Delayed mixing of the stratified charge is achieved by placement of a Helmholtz resonator cavity in the head or closed end of each combustion chamber. The Helmholtz resonator cavity communicates with the main combustion chamber via a narrow slot made around the periphery of the top end of the chamber. On the intake stroke of each engine cylinder, the main chamber is filled with a slightly fuel rich gaseous charge while the companion Helmholtz resonator cavity is filled with air. During the compression stroke some of the rich air-fuel mixture is forced into the resonator cavity via the communicating slot. At or near TDC, the air-fuel mixture in the main chamber is ignited. As the flame front progresses across the chamber a rapid increase in pressure serves not only to power the piston, but also to initiate a resonant reaction in the Helmholtz resonator cavity which results in a transfer of the unburned gases therein into the main combustion chamber. This both sustains the power stroke and at the same time lowers the peak flame temperature in the main chamber.
摘要翻译：呈现四冲程循环内燃机具有持续的动力冲程，其由分层装料的延迟混合产生。使用总体化学计量空气 - 燃料混合物的延迟混合导致形成少量的氮氧化物。分层电荷的延迟混合通过将亥姆霍兹共振腔放置在每个燃烧室的头部或封闭端中来实现。亥姆霍兹谐振腔通过围绕腔室顶端周边形成的窄槽与主燃烧室连通。在每个发动机气缸的进气冲程中，主室充满稍微富含燃料的气体，而伴随的亥姆霍兹共振腔充满空气。在压缩冲程期间，一些富空燃混合物经由连通槽被迫进入谐振腔。在TDC或其附近，主室中的空气 - 燃料混合物被点燃。当火焰前沿进入室时，压力的快速增加不仅用于为活塞提供动力，而且还用于启动亥姆霍兹共振腔中的共振反应，这导致其中未燃烧的气体进入主燃烧室。这同时维持动力行程，同时降低主室中的峰值火焰温度。

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