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US08831857B2 Method and system for estimating fuel composition 有权
燃料成分估算方法和系统

Method and system for estimating fuel composition
Abstract:
Methods and systems are provided for operating a fuel system configured to deliver a gaseous fuel to an engine. Following tank refilling, the fuel composition is selectively updated based on fuel tank pressure, temperature, and air content data. When the engine is subsequently restarted, the fuel rail is primed for a duration based on the updated composition.
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