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    • 9. 发明授权
    • Method for the operation of a fuel system for an LPG engine
    • 一种用于LPG发动机燃料系统操作的方法
    • US07017559B2
    • 2006-03-28
    • US10794574
    • 2004-03-05
    • Jörn MeyAndreas KistnerAndreas FirschingFrank WucherpfenningJoachim Seydell
    • Jörn MeyAndreas KistnerAndreas FirschingFrank WucherpfenningJoachim Seydell
    • F02B44/00
    • F02M21/0242F02D19/022F02D19/028F02M21/0212F02M21/06Y02T10/32
    • A method for operating a fuel system for an internal combustion engine operated with fuel gas. The fuel system has at least one electrically actuated shutoff valve (4) and at least one electrically operated heating device (14, 16). The operating method includes: generating a signal to turn on the heating device (14, 16) when the internal combustion engine is turned on; determining a heating demand (υreference) of the fuel system when the heating device (14, 16) is turned on; and depending on the heating demand (υreference) of the fuel system, determining a delay time between the time the heating device (14, 16) is turned on and the time the shutoff valve (4) is opened. The heating demand (υreference) can be a function of a temperature (Tengine coolant) of the engine and/or a temperature (Thydraulic fluid) independent of the engine and/or the current (Iheating) flowing through the heating device.
    • 一种用于操作燃料气体的内燃机的燃料系统的操作方法。 燃料系统具有至少一个电动切断阀(4)和至少一个电动加热装置(14,16)。 该操作方法包括:当内燃机接通时,产生一个信号来接通加热装置(14,16); 当所述加热装置(14,16)接通时,确定所述燃料系统的加热需求(上升参考值); 并且取决于燃料系统的加热需求(上升参考),确定加热装置(14,16)接通的时间与截止阀(4)的时间之间的延迟时间 开了 加热需求(升压参考)可以是发动机的温度(T 发动机冷却剂)和/或温度(T>液压油)的函数, SUB>)独立于发动机和/或流过加热装置的电流(I>加热)。
    • 10. 发明授权
    • Air/fuel ratio controller for larger internal combustion engines
    • 大型内燃机的空燃比控制器
    • US5390651A
    • 1995-02-21
    • US145391
    • 1993-10-29
    • Stephen H. NussbaumBradford A. Lessard
    • Stephen H. NussbaumBradford A. Lessard
    • F02D19/02F02D41/14F02M21/02F02M7/00
    • F02D19/023F02D19/022F02D41/1443F02M21/0233F02M21/0239F02D19/028Y02T10/32
    • Apparatus, and a corresponding method for its operation, for controlling the air/fuel ratio in a large engine having one or more banks of cylinders with separate intake and exhaust manifolds. Oxygen sensors in the manifolds are sampled periodically to provide the apparatus with an indication of the level of oxygen, and therefore an indication of the level of various pollutants, in exhaust gases discharged from the engine. The apparatus, preferably in microprocessor form, computes a fuel control correction based on the difference between the sensed oxygen level and a desired oxygen level in each exhaust manifold. The correction is applied in the form of a change to the pulse width of a binary control signal applied to a solenoid valve. In the illustrative embodiment, the solenoid valve is coupled to a fuel pressure regulator and functions to vent an air chamber in the regulator when the solenoid is actuated. Changing the pulse width of the control signal varies the average fuel pressure and thereby controls the air/fuel ratio, which in turn corrects the oxygen level in the exhaust manifold. The controller also monitors various temperatures in the engine and selectively disables control of the air/fuel ratio when selected temperatures fall outside assigned limits.
    • 装置及其操作的相应方法,用于控制具有一个或多个具有独立进气歧管和排气歧管的气缸组的大型发动机中的空气/燃料比。 定期采样歧管中的氧传感器,为设备提供从发动机排放的废气中的氧气水平的指示,并因此指示各种污染物的水平。 优选地以微处理器形式的装置基于每个排气歧管中检测到的氧气水平和期望的氧气水平之间的差异来计算燃料控制校正。 以对施加到电磁阀的二进制控制信号的脉冲宽度的改变的形式施加校正。 在说明性实施例中,电磁阀联接到燃料压力调节器,并且用于在螺线管致动时排出调节器中的空气室。 改变控制信号的脉冲宽度会改变平均燃料压力,从而控制空气/燃料比,这反过来校正排气歧管中的氧气水平。 控制器还监控发动机中的各种温度,并且当选定的温度落在分配的限制之外时,选择性地禁止空气/燃料比的控制。