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专利名称：Air-fuel ratio detection system for internal
combustion engine
发明人：Hasegawa, Yusuke,Nishimura,
Yoichi,Komoriya, Isao,Akazaki,
Shusuke,Kimura, Eisuke,Abe, Satoru,Machida,Kei
申请号：EP94114309.1申请日：19940912公开号：EP03213A1公开日：19950315
专利附图：
摘要：A system for detecting air-fuel ratio of an internal combustion engine bysampling outputs of an air-fuel ratio sensor installed at an exhaust system confluencepoint of said engine. A timing map is prepared to be retrieved by the engine speed andmanifold absolute pressure to determine one among sampled data which are
successively stored in buffers. It is selected such that as the engine speed decreases orthe manifold absolute pressure increases, a datum sampled at earlier crank angularposition is selected. At an engine equipped with a variable valve timing mechanism, adatum sampled at earlier crank angular position is selected in the valve timing is
controlled for high engine speed provided that the engine speed and manifold absolutepressure is constant. The sampled data stored in the buffers may be transferred toanother buffers at a predetermined crank angular position. The sampled data iscorrected by an environmental conditions including atmospheric pressure, a mixture orsensor degradation. Each buffer may have a plurality of sampled data.
申请人：HONDA GIKEN KOGYO KABUSHIKI KAISHA
地址：1-1, 2-chome Minami-Aoyama Minato-ku, Tokyo JP
国籍：JP
代理机构：Fincke, Karl Theodor, Dipl.-Phys. Dr.
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