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    Two-stroke otto cycle engines
    1.
    发明公开
    Two-stroke otto cycle engines 失效
    Zweitakt-Ottomotor。

    公开(公告)号：EP0339969A2

    公开(公告)日：1989-11-02

    申请号：EP89304157.4

    申请日：1989-04-26

    申请人： RICARDO GROUP PLC

    发明人： Overington, Martin Thomas ,  Stokes, John ,  Hundleby, Giles Edward ,  Lesley, Samuel

    IPC分类号： F01N3/20 ,  F02B33/04 ,  F02B33/30

    CPC分类号： F01N3/20 ,  F01N3/2053 ,  F01N13/009 ,  F01N2410/00 ,  F02B1/04 ,  F02B25/14 ,  F02B33/04 ,  F02B33/30 ,  F02B2075/025

    摘要： A two-stroke engine comprises a cylinder (2) accommodating a piston (6) and having an air inlet port (18) and an exhaust port (14,16). The exhaust port (14,16) communicates with an exhaust system (25) which includes a reduction catalyst (R) and an oxidation catalyst (O). The exhaust system (25) includes two exhaust flow paths (24,26) in parallel, the first (24) of which includes the reduction catalyst (R) and the second of which bypasses the reduction catalyst (R), the downstream ends of the two flow paths (24,26) being connected together upstream of the oxidation catalyst (O). The exhaust port (14,16) is controlled by the piston (2) or by poppet valves (32,34) so that as the piston (6) performs its downstroke the initial flow of exhaust gas is substantially through the first flow path (24) and the subsequent flow of exhaust gas is substantially through the second flow path (26).

    摘要翻译： 二冲程发动机包括容纳活塞（6）并具有进气口（18）和排气口（14,16）的气缸（2）。 排气口（14,16）与包括还原催化剂（R）和氧化催化剂（O）的排气系统（25）连通。 排气系统（25）包括两个平行的排气流动路径（24,26），其中第一（24）包括还原催化剂（R），其中第二个绕过还原催化剂（R），下游端 两个流动路径（24,26）在氧化催化剂（O）的上游连接在一起。 排气口（14,16）由活塞（2）或提升阀（32,34）控制，使得当活塞（6）执行其下行程时，废气的初始流动基本上通过第一流动路径 24），随后的废气流大体上通过第二流路（26）。

    Two-stroke otto cycle engines
    2.
    发明公开
    Two-stroke otto cycle engines 失效
    双轨奥托循环发动机

    公开(公告)号：EP0339969A3

    公开(公告)日：1990-09-19

    申请号：EP89304157.4

    申请日：1989-04-26

    申请人： RICARDO GROUP PLC

    发明人： Overington, Martin Thomas ,  Stokes, John ,  Hundleby, Giles Edward ,  Lesley, Samuel

    IPC分类号： F01N3/20 ,  F02B33/04 ,  F02B33/30

    CPC分类号： F01N3/20 ,  F01N3/2053 ,  F01N13/009 ,  F01N2410/00 ,  F02B1/04 ,  F02B25/14 ,  F02B33/04 ,  F02B33/30 ,  F02B2075/025

    摘要： A two-stroke engine comprises a cylinder (2) accommodating a piston (6) and having an air inlet port (18) and an exhaust port (14,16). The exhaust port (14,16) communicates with an exhaust system (25) which includes a reduction catalyst (R) and an oxidation catalyst (O). The exhaust system (25) includes two exhaust flow paths (24,26) in parallel, the first (24) of which includes the reduction catalyst (R) and the second of which bypasses the reduction catalyst (R), the downstream ends of the two flow paths (24,26) being connected together upstream of the oxidation catalyst (O). The exhaust port (14,16) is controlled by the piston (2) or by poppet valves (32,34) so that as the piston (6) performs its downstroke the initial flow of exhaust gas is substantially through the first flow path (24) and the subsequent flow of exhaust gas is substantially through the second flow path (26).

    Internal combustion engines
    5.
    发明公开
    Internal combustion engines 失效
    内燃机

    公开(公告)号：EP0432950A1

    公开(公告)日：1991-06-19

    申请号：EP90313094.6

    申请日：1990-12-03

    申请人： RICARDO GROUP PLC

    发明人： Lesley, Samuel

    IPC分类号： F02B25/14 ,  F02F1/42

    CPC分类号： F02F1/4214 ,  F02B1/04 ,  F02B3/06 ,  F02B25/145 ,  F02B2075/025 ,  F02F2001/245 ,  F02F2001/247

    摘要： The two-stroke engine includes at least one cylinder (4), a piston (6) reciprocable within the cylinder and a cylinder head (8) which contains at least one exhaust port (10) which is controlled by a poppet valve (18) and at least two inlet ports (12) which are controlled by respective poppet valves (20) and are connected to respective inlet ducts (14). The inlet ports (24) are of directed type with the axes (23) of the inlet ducts (24) being convergent in the direction of flow whereby the air flowing through them into the cylinder (4) flows preferentially generally towards the cylinder axis (5). The axes (23) of the inlet ducts (24) pass substantially through the cylinder axis where the air flows through the inlet ports (12) merged to form a single air flow on or adjacent the cylinder axis.

    摘要翻译： 该二冲程发动机包括至少一个气缸（4），在气缸内往复运动的活塞（6）和包含至少一个由提升阀（18）控制的排气口（10）的气缸盖（8） 和至少两个由相应提升阀（20）控制并连接到相应入口管道（14）的入口端口（12）。 入口端口（24）是定向类型的，其中入口管道（24）的轴线（23）在流动方向上会聚，由此流过它们进入气缸（4）的空气优选地大致朝向气缸轴线 5）。 入口管道（24）的轴线（23）基本上穿过气缸轴线，在那里空气流过入口端口（12）合并，以在气缸轴线上或气缸轴线附近形成单个气流。