Method and apparatus for operation of an internal

专利名称：Method and apparatus for operation of an

internal combustion engine, especially of amotor vehicle, with a lean fuel/air mixture

发明人：Ernst Wild申请号：US09510454申请日：20000222公开号：US06273077B1公开日：20010814

专利附图：

摘要：The method of operating an internal combustion engine, especially of a motorvehicle, having a combustion chamber (), which is operable in a plurality of combustion

cycles, includes feeding an air mass () and a fuel mass () into the combustion chamber () ineach combustion cycle; adjusting a mixture composition lambda (&lgr;) of the air mass tothe fuel mass for one of the combustion cycles so that &lgr;>1; determining a residual airportion present in the combustion chamber () due to combustion occurring in thecombustion chamber in the combustion cycle in which the mixture composition lambda(&lgr;) is greater than one; and reducing the air mass to be supplied to the combustionchamber () in another combustion cycle following the one combustion cycle in which&lgr;>1 by about the residual air portion found in the one combustion cycle. The portionof the residual air in the combustion chamber is exactly accounted for in determiningfuel/air stoichiometry during combustion in this method so that engine operation andexhaust gas composition are improved. The invention also includes an control unit and/orcontrol element of a control unit that is operable to perform this method.

申请人：ROBERT BOSCH GMBH

代理人：Michael J. Striker

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