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    • 4. 发明授权
    • Engine intake A/F ratio control system in outboard engine system
    • 发动机进气A / F比控制系统在舷外发动机系统
    • US06962047B2
    • 2005-11-08
    • US10124338
    • 2002-04-18
    • Hiroyuki YoshidaToyokazu KawasakiYoshihiko Fukuda
    • Hiroyuki YoshidaToyokazu KawasakiYoshihiko Fukuda
    • F01N13/00F01N99/00F02B61/04F02D35/00F02D41/14F02M7/00F02M7/24F02M23/04F01N3/10
    • F02M23/04F01N13/008F01N2590/021F02B61/045F02D35/0061F02D41/1454F02D41/1456F02M7/24Y02T10/146
    • In an engine intake A/F ratio control system in an outboard engine system, a secondary air passage (P) for supplying secondary air for regulating the A/F ratio of an air-fuel mixture is connected to a carburetor (33) in an intake system of an engine (E), and a duty control valve (68) is connected to the secondary air passage (P). A duty control unit (92) is connected to the duty control valve (68) for controlling the duty ratio of a pulse applied to a coil (76) of the duty control valve (68), and an LAF sensor (94) is mounted to an exhaust system for detecting an A/F ratio of an exhaust gas to input a detection signal proportional to the A/F ratio of the exhaust gas to the duty control unit (92). Thus, in any of a case when the tolerance of the purifying rate of the catalytic converter is set relatively widely with an engine output taken into consideration to a certain extent, and a case when the set range is shifted to a rich side of the A/R ratio with the engine output taken into serious consideration, the A/F ratio of the exhaust gas can be controlled properly to a desired target value.
    • 在舷外发动机系统的发动机进气A / F比控制系统中,将用于调节空气 - 燃料混合物的A / F比的二次空气的二次空气通路(P)连接到化油器(33) 发动机(E)的进气系统和工作控制阀(68)连接到二次空气通路(P)。 负载控制单元(92)连接到占空比控制阀(68),用于控制施加到占空比控制阀(68)的线圈(76)的脉冲的占空比,并且安装LAF传感器(94) 涉及一种用于检测排气的A / F比以输出与排气的A / F比与占空比控制单元(92)成比例的检测信号的排气系统。 因此,在将催化转化器的净化率的公差设定为相当广泛的情况下,在一定程度上考虑了发动机输出的情况下,以及当设定范围向A的浓侧偏移时 / R比,引擎输出考虑在内,可以将排气的A / F比适当地控制到期望的目标值。
    • 8. 发明申请
    • Outboard motor equipped with internal combustion engine with carburetor
    • 舷外马达配有带化油器的内燃机
    • US20070125342A1
    • 2007-06-07
    • US11545780
    • 2006-10-10
    • Kazuyoshi SatoHiroshi WatanabeToshiaki OgawaTetsu WadaToyokazu Kawasaki
    • Kazuyoshi SatoHiroshi WatanabeToshiaki OgawaTetsu WadaToyokazu Kawasaki
    • F02D9/10F02B23/00
    • F02M3/02
    • An outboard motor has an internal combustion engine with a carburetor. The carburetor is designed to extend maintenance interval greatly by preventing or suppressing the deposition of solid matters in the gap between the intake passage and a butterfly-type throttle valve therein. The throttle valve is divided, by a valve axis about which the throttle valve turns, into a first valve part that turns from the downstream side to the upstream side with respect to an air intake direction when the fully closed throttle valve is opened and a second valve part that turns from the upstream side to the downstream side with respect to the air intake direction when the fully closed throttle valve is opened. The first valve part has an edge that moves to the upstream side past bypass ports when the fully closed throttle valve is opened, and the second valve part is provided with a through hole that allows air to flow therethrough at a flow rate necessary for idling when the throttle valve is fully closed.
    • 舷外马达具有带有化油器的内燃机。 化油器设计为通过防止或抑制固体物质在进气通道和蝶阀式节流阀之间的间隙中的沉积来大大延长维护间隔。 通过节流阀所转动的阀轴将节流阀分为当全开节流阀打开时相对于进气方向从下游侧向上游侧转动的第一阀部分,第二阀部分 当全开节流阀打开时,阀部分相对于进气方向从上游侧向下游侧转动。 当完全关闭的节流阀打开时,第一阀部分具有沿着上游侧移动到旁通端口的边缘,并且第二阀部分设置有允许空气以空转所需的流量流过其中的通孔, 节流阀完全关闭。
    • 9. 发明授权
    • Outboard engine system
    • 舷外发动机系统
    • US06375526B2
    • 2002-04-23
    • US09754369
    • 2001-01-05
    • Tomonori IkumaHiroki TawaToyokazu Kawasaki
    • Tomonori IkumaHiroki TawaToyokazu Kawasaki
    • B63H2110
    • F02B61/045B63H20/00F02B2075/027F02M1/04F02M35/167
    • An outboard engine system includes a 4-cycle engine. The engine includes an engine block, a cylinder head coupled to the engine block and having an intake port in one side thereof, a carburetor including a carburetor body disposed on one side of the engine block adjacent the intake port and having an intake passageway, and a bypass-type starting device mounted to the carburetor body, and an intake pipe means which connects the intake passageway and the intake port to each other. At least an upper half of the engine including the carburetor is covered with an engine cover. In such outboard engine system, the bypass-type starting device of the carburetor is mounted to the carburetor body between the intake passageway and the engine block. Thus, it is possible to achieve both of low-speed and high-speed performances and at the same time, to enhance the accuracy of an air-fuel ratio and provide a reduction in fuel consumption and an enhancement in nature of the exhaust gas, and moreover, to avoid an increase in size of the engine cover.
    • 舷外发动机系统包括一个4冲程发动机。 发动机包括发动机缸体,联接到发动机缸体的气缸盖,在其一侧具有进气口,化油器,包括设置在发动机缸体的与进气口相邻的一侧并具有进气通道的化油器体;以及 安装在化油器主体上的旁通式起动装置和将进气通路与进气口连结的进气管装置。 至少包括化油器的发动机的上半部分被发动机盖覆盖。 在这种舷外发动机系统中,化油器的旁通式起动装置安装在进气通道和发动机缸体之间的化油器体上。 因此,可以实现低速和高速性能,同时,为了提高空燃比的精度,能够减少燃料消耗,提高排气性, 此外,为了避免发动机盖的尺寸增大。