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:
Dec. 25, 2001
Filed:
Mar. 28, 2000
Martin Debusmann, Karlsruhe, DE;
Tobias Roulet, Leonberg, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
The invention proposes a method for torque monitoring in the case of Otto engines in motor vehicles, in which a reference torque value (M,) is derived from the speed (n) of the Otto engine and the air mass (L) supplied and, in homogeneous lean operation (lambda=1 to 1.4), this reference torque value (M,) is corrected by a signal derived from a signal (&lgr;,) from a lambda probe and is then compared with a torque value (M,) specified by the driver. Torque-reducing interventions in the control of the engine are performed if the corrected reference torque value (M,) exceeds the torque value (M,) specified by the driver by a specifiable factor or value. This method allows reliable and accurate torque monitoring, even at lambda values greater than 1.