The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1994
Filed:
Oct. 19, 1993
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An internal combustion engine includes a lambda control device having a lambda sensor and a lambda control for regulating a fuel-air mixture to be supplied to an internal combustion engine to a set-point value, outside of full load operation, as a function of an output signal of the lambda sensor, and a mixture control device for setting the fuel-air mixture to a value being less than the set-point value, during full load operation of the internal combustion engine and with the lambda control switched off. A method for operating the internal combustion engine under full load includes continuously detecting and comparing the output signal of the lambda sensor with a rich and a lean threshold value, with the lambda control switched off, releasing the lambda control for a selectable number of mixture state changes, if the output signal of the lambda sensor falls below the lean threshold value during a period of time being greater than a preset value, and keeping the lambda control released until a mean value of the lambda control value indicates a rich main mixture.