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    • 2. 发明申请
    • INTERNAL COMBUSTION ENGINE
    • 内燃机
    • WO2008078173A1
    • 2008-07-03
    • PCT/IB2007/004081
    • 2007-12-21
    • TOYOTA JIDOSHA KABUSHIKI KAISHAKOJIMA, susumuHATTORI, Fumiaki
    • KOJIMA, susumuHATTORI, Fumiaki
    • F02M55/04F02M63/02F02M69/46F02M69/04
    • F02M63/0225F02M55/04F02M63/029F02M63/0295F02M69/046F02M69/462
    • An internal combustion engine includes a low-pressure fuel feed, system (81) that feeds low-pressure fuel pressurized by a feed pump (84) to first delivery pipes (64, 65) through a low-pressure fuel feed pipe (85), first injectors (62, 63) capable of injecting the low-pressure fuel into intake ports (24, 25), a high-pressure fuel feed system (82) that feeds high-pressure fuel pressurized by a high-pressure pump (91) to second delivery pipes (68, 69) through a high-pressure fuel feed pipe (92), and second injectors (66, 67) capable of injecting the high-pressure fuel into combustion chambers (22, 23). A bypass passage (97) communicates the first delivery pipe (65) with the second delivery pipe (97), and a check valve (98) is provided in the bypass pipe (97) for preventing flow of the fuel from the second delivery pipe (68) to the first delivery pipe (65). Thus, transmission of fuel pressure pulsation caused by driving of the high-pressure pump is effectively restricted, so that an appropriate amount of fuel can be supplied to the engine for improved control of the air/fuel ratio.
    • 内燃机包括低压燃料供给系统(81),其将通过供给泵(84)加压的低压燃料通过低压燃料供给管(85)供给到第一输送管(64,65) ,能够将低压燃料喷射到吸入口(24,25)中的第一喷射器(62,63);高压燃料供给系统(82),其输送由高压泵(91)加压的高压燃料 )通过高压燃料供给管(92)连接到第二输送管(68,69),以及能够将高压燃料喷射到燃烧室(22,23)中的第二喷射器(66,67)。 旁通通道(97)将第一输送管(65)与第二输送管(97)连通,并且在旁通管(97)中设置止回阀(98),用于防止燃料从第二输送管 (68)连接到第一输送管(65)。 因此,有效地限制由高压泵的驱动引起的燃料压力脉动的传递,从而可以向发动机供应适量的燃料,以改善空燃比的控制。
    • 5. 发明申请
    • FUEL INJECTION DEVICE HAVING AN ORIFICE PLATE
    • 燃油喷射装置
    • WO2007074385A3
    • 2007-10-04
    • PCT/IB2006003782
    • 2006-12-27
    • TOYOTA MOTOR CO LTDKOJIMA SUSUMU
    • KOJIMA SUSUMU
    • F02M61/18
    • F02M51/0671F02M61/1806F02M61/1833F02M61/1853
    • An injection opening plate (43) in which the injection openings (44a, 44b, 44c) are formed is fixed to a distal end portion of the valve body (42) of injector (33). The needle valve (48) is movably supported in the valve body (42). The communication between the fourth fuel passageway (62) and the injection openings (44a, 44b, 44c) is established by the needle valve (48) so that fuel can be injected into combustion chamber (16). Each injection opening (44a, 44b, 44c) is constructed of the constricted portion (71a, 71b, 71c) that communicates with fourth fuel passageway (62) and that has a tapered shape with the passageway diameter decreasing toward the forward end side, and the expanded portion (72a, 72b, 72c) whose passageway diameter is larger than that of constricted portion (71a, 71b, 71c) and is constant in direction of the axis, and which communicates with combustion chamber (16).
    • 其中形成喷射口(44a,44b,44c)的喷射开口板(43)固定到喷射器(33)的阀体(42)的远端部分。 针阀(48)可移动地支撑在阀体(42)中。 第四燃料通路(62)与喷射开口(44a,44b,44c)之间的连通通过针阀(48)建立,使燃料能够喷射到燃烧室(16)中。 每个注射开口(44a,44b,44c)由与第四燃料通道(62)连通并且具有通道直径朝向前端侧减小的锥形形状的收缩部分(71a,71b,71c)构成,以及 膨胀部分(72a,72b,72c),其通道直径大于收缩部分(71a,71b,71c)的直径并且在轴线方向上是恒定的,并且与燃烧室(16)连通。