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    • 6. 发明申请
    • OPERATING METHOD FOR A SPARK IGNITION, MULTI-CYLINDER INTERNAL COMBUSTION ENGINE WITH DIRECT FUEL INJECTION
    • 作业程序对外点火器,燃油直喷WORKING多缸内燃机
    • WO00052313A1
    • 2000-09-08
    • PCT/EP2000/000929
    • 2000-02-05
    • F02B1/04F02B75/12F02D33/00F02D41/00F02D41/34F02M69/08
    • F02D41/008F02B1/04F02B2075/125F02D41/0002F02D2041/3088F02M69/08Y02T10/42
    • The invention relates to an operating method for a spark ignition, multi-cylinder internal combustion engine with direct fuel injection. In addition to gas exchange valves, the internal combustion engine has an air-assisted fuel injection valve for each cylinder combustion chamber. Said fuel injection valve provides a means of introducing a small, precompressed and therefore pressurised quantity of air into the combustion chamber, especially for injecting the fuel, in addition to the quantity of fresh air that is supplied via at least one gas exchange valve. According to the invention, the quantity of air that is introduced into the combustion chambers via the air-assisted fuel injection valves is measured for each cylinder individually, at least at low-load points of the internal combustion engine, by controlling said quantity of air in an appropriate manner. This quantity of air is measured in such a way as to ensure that at a constant operating point of the internal combustion engine, the composition of the mixture for subsequent combustion is essentially the same in all of its combustion chambers. According to the invention, the gas exchange valves which control the supply of fresh air into the combustion chambers can be shut off at the low-load points of the internal combustion engine and the introduction of air into the combustion chambers can be carried out by the air-assisted fuel injection valves alone.
    • 本发明涉及一种操作火花点火,燃料直接喷射型多气缸内燃机中操作的方法,该方法中,除了空气辅助的燃料喷射阀,用于每个气缸的燃烧室中的气体交换阀,通过该低预压缩,因此正压缩空气量,特别是用于引入燃料添加的 通过至少一个气体交换阀的新鲜空气可供给量可被引入到燃烧室。 根据本发明,至少在引入到所述空气辅助燃料喷射燃烧室的内燃机的低负荷点相同的尺寸通过分别适当的控制气缸阀的空气量,以使在所有燃烧室的内燃机的恒定动作点用于随后的燃烧存在于大致相同的混合物的组合物。 其中这里所用的内燃机的低负荷点可使用的新鲜空气供给到燃烧室中控制气体交换阀关闭并进行了空气辅助燃料喷射阀单独引入到燃烧室中的空气。
    • 8. 发明申请
    • AIR-ASSIST FUEL INJECTION SYSTEM
    • 空气辅助燃料喷射系统
    • WO1993008384A2
    • 1993-04-29
    • PCT/US1992005238
    • 1992-06-19
    • HITACHI, LTD.
    • HITACHI, LTD.SAIKALIS, GeorgeYAMAUCHI, TeruoBYERS, Robert, W.
    • F02B0
    • F02D41/0002F02D7/02F02D41/064F02D41/08F02D43/00F02D2041/3088F02M61/162F02M67/12F02M69/08Y02T10/42Y10S239/90
    • An air-assist fuel injection system controls the supply of compressed air to the fuel injectors according to the operating status of internal combustion engine. For cold start operation, compressed air is supplied continuously to the injectors; while, for partial load (cruising) and partial acceleration, air is supplied as a pulsating (air volume control) flow consisting of air pulses coincident with the injected fuel pulses. On the other hand, for acceleration and deceleration, the supply of compressed air to the injectors may be inhibited. Further, idle speed control can be achieved using the air-assist to the fuel injectors, thereby eliminating need for a separate idle speed control valve. To enhance system operation, a fuel injector may be employed in which both the fuel and the applied compressed air are swirled, but in opposite directions, so as to achieve a fuel spray of small particle size.
    • 空气辅助燃料喷射系统根据内燃机的运行状态控制向燃料喷射器供应压缩空气。 对于冷启动操作,压缩空气连续供给喷油器; 而对于部分负载(巡航)和部分加速,空气作为脉冲(空气体积控制)流被提供,其由与注入的燃料脉冲重合的空气脉冲组成。 另一方面,对于加速和减速,可以抑制向喷射器供应压缩空气。 此外,可以使用对燃料喷射器的空气辅助来实现怠速控制,从而不需要单独的怠速转速控制阀。 为了增强系统操作,可以采用燃料喷射器,其中燃料和施加的压缩空气都被涡旋,但是在相反的方向上,以便实现小粒径的燃料喷射。