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    • 6. 发明授权
    • Method for achieving minimum liquid pilot fuel delivery to each cylinder of a dual fuel engine while operating in a dual fuel mode
    • 用于在双燃料模式下操作时实现双燃料发动机的每个气缸的最小液体先导燃料输送的方法
    • US06289871B1
    • 2001-09-18
    • US09036045
    • 1998-03-06
    • Scott C. BrownJeffery T. FischerMartin L. Willi
    • Scott C. BrownJeffery T. FischerMartin L. Willi
    • F02B300
    • F02D41/008F02D19/061F02D19/0628F02D19/105F02D35/023F02D41/0025F02D41/0027F02D41/1446Y02T10/36
    • A method for controlling and adjusting the delivery of liquid pilot fuel to each cylinder of a dual fuel engine during a dual fuel operating mode so as to both minimize the quantity of liquid pilot fuel being delivered to each individual cylinder while, at the same time, ensuring that such minimum quantity of liquid pilot fuel provides complete combustion performance within each such cylinder wherein certain cylinder performance parameters such as exhaust port temperature or cylinder pressure are evaluated on a per cylinder basis in order to determine cylinder performance. The present method establishes certain predetermined incremental changes in the selected cylinder performance parameters, which changes are indicative of poor or deteriorated combustion performance within any particular cylinder, and thereafter varies the amount of liquid pilot fuel delivered to such cylinder based upon an analysis and evaluation of changes occurring in the selected cylinder performance parameters. Although it is preferred that each cylinder be evaluated on an individual basis, it is recognized and anticipated that, in some applications, the present method may be used to control the delivery of liquid pilot fuel to two or more cylinders simultaneously.
    • 一种用于在双燃料运行模式期间控制和调节液体引燃燃料输送到双燃料发动机的每个气缸的方法,以便使输送到每个气缸的液体引燃燃料的量最小化,同时, 确保这种最小量的液体引燃燃料在每个这样的气缸内提供完整的燃烧性能,其中某些气缸性能参数(例如排气口温度或气缸压力)以每缸为基础进行评估,以便确定气缸性能。 本方法在所选择的气缸性能参数中建立某些预定的增量变化,该变化指示在任何特定气缸内的燃烧性能差或劣化,然后根据分析和评价来改变输送到这种气缸的液体引燃燃料的量 所选气缸性能参数发生变化。 虽然优选每个气缸在个别基础上进行评估,但是应当认识到并预期在某些应用中,本方法可用于控制液体引燃燃料同时向两个或多个气缸的输送。
    • 8. 发明授权
    • Method for determining the energy content of a fuel delivered to an
engine
    • 用于确定输送到发动机的燃料的能量含量的方法
    • US6055963A
    • 2000-05-02
    • US36111
    • 1998-03-06
    • Scott C. BrownMartin L. Willi
    • Scott C. BrownMartin L. Willi
    • F02D41/00F02M21/02
    • F02D41/0027F02D19/027F02D19/029F02D19/105F02M21/0215Y02T10/32Y02T10/36
    • A method for adjusting a fuel control system of an internal combustion engine to account for variations in the energy content of a fuel delivered to the engine involves monitoring the O.sub.2 level of the engine exhaust gases. The fuel may be a gaseous fuel for example. The fuel control system utilizes a stored gaseous fuel energy content value (E.sub.G) to determine the necessary duration of a gaseous fuel admission valve control signal. The method includes sensing an actual engine exhaust gas O.sub.2 level and comparing the actual exhaust gas O.sub.2 level with a desired exhaust gas O.sub.2 level. The stored gaseous fuel energy content value (E.sub.G) is adjusted based upon the comparison. The desired exhaust gas O.sub.2 level may be determined as a function of one or more engine operating parameters which indicate a desired or expected air/fuel ratio, the level of O.sub.2 in the exhaust gases being an indicator of the air/fuel ratio.
    • 用于调节内燃机的燃料控制系统以解决输送到发动机的燃料的能量含量的变化的方法包括监测发动机废气的O2水平。 燃料可以是例如气体燃料。 燃料控制系统利用储存的气体燃料能量含量值(EG)来确定气体燃料入口阀控制信号的必要持续时间。 该方法包括感测实际的发动机排气O 2水平并将实际排气O2水平与期望的排气O 2水平进行比较。 基于比较来调节储存的气体燃料能量含量值(EG)。 可以根据指示所需或期望的空气/燃料比的一个或多个发动机操作参数来确定期望的废气O 2水平,排气中的O 2水平作为空气/燃料比的指标。