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:
May. 22, 2001
Filed:
Nov. 24, 1999
Magneti Marelli S.p.A., Milan, IT;
Abstract
Method of controlling the direct injection of fuel into a combustion chamber of an internal combustion engine, according to which, in order to effect injection in relation to a first stroke of the cylinder starting from a dead center, the following steps are performed: estimating during a stroke of the cylinder preceding the first stroke the pressure which will be present in the suction manifold at the first dead center, estimating an injection advance for the injection on the basis of the estimation of the pressure in the suction manifold, detecting the pressure in the fuel manifold, estimating the mean pressure which will be present in the chamber during the injection on the basis of the estimates effected in the preceding steps and on the basis of a function representative of the course of the pressure in the combustion chamber under reference operating conditions of the engine, estimating the mean flow rate of the injector during the injection on the basis of the pressure difference defined by the pressure detected in the fuel manifold and the mean pressure estimated in the chamber, and calculating and programming a delivery interval for the injector on the basis of the mean flow rate estimated and of the quantity of fuel to be injected.