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APPARATUS AND METHOD FOR CONTROLLING RAIL PRESSURE OF HIGH-PRESSURE COMMON-RAIL TUBE CAVITY OF HIGH-PRESSURE COMMON-RAIL FUEL SYSTEM OF ENGINE
APPARATUS AND METHOD FOR CONTROLLING RAIL PRESSURE OF HIGH-PRESSURE COMMON-RAIL TUBE CAVITY OF HIGH-PRESSURE COMMON-RAIL FUEL SYSTEM OF ENGINE
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机译：发动机高压共轨燃油系统高压共轨管腔压力控制装置及方法
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摘要
An apparatus (200) for controlling the rail pressure of the high-pressure common-rail tube cavity of the high-pressure common-rail fuel system of an engine, comprising an operation condition acquiring device (202), which is used for acquiring operation conditions associated with the high-pressure common-rail fuel system of the engine; a fuel quantity metering valve equivalent cross-sectional area determining device (204) coupled with the operation condition acquiring device (202), which is used for determining an equivalent cross-sectional area of the fuel quantity metering valve (210) by a linear physical model (212) of fuel quantity metering valve equivalent cross-sectional area based on an acquired operation condition and a target value of the rail pressure of the high-pressure common-rail tube cavity; a signal generating device (206) coupled with the fuel quantity metering valve equivalent cross-sectional area determining device (204), which used for generating a driving signal (208) for controlling the equivalent cross-sectional area of the fuel quantity metering valve (210) based on the determined fuel quantity metering valve equivalent cross-sectional area. The apparatus can control the rail pressure of the high-pressure common-rail tube cavity precisely. A method for controlling the rail pressure of the high-pressure common-rail tube cavity of the high-pressure common-rail fuel system of an engine is also disclosed. An apparatus and a method for observing fuel pressure are further disclosed.
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