专利名称：METHOD FOR DETERMINING THE ENERGY
CONTENT OF A FUEL DELIVERED TO ANENGINE BASED UPON EXHAUST GAS O 2?LEVEL
发明人：BROWN, Scott, C.,WILLI, Martin, L.申请号：EP99908576.4申请日：19990301公开号：EP0986701A1公开日：20000322
摘要：A method for adjusting a fuel control system of an internal combustion engineto account for variations in the energy content of a fuel delivered to the engine involvesmonitoring the O.sub.2 level of the engine exhaust gases. The fuel may be a gaseous fuelfor 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 controlsignal. The method includes sensing an actual engine exhaust gas O.sub.2 level andcomparing 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 thecomparison. The desired exhaust gas O.sub.2 level may be determined as a function ofone or more engine operating parameters which indicate a desired or expected air/fuelratio, the level of O.sub.2 in the exhaust gases being an indicator of the air/fuel ratio.
申请人：CATERPILLAR INC.
地址：100 Northeast Adams Street PeoriaIllinois 61629-6490 US
国籍：US
代理机构：Wagner, Karl H., Dipl.-Ing.
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