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:
Aug. 28, 2001
Filed:
Oct. 28, 1999
Marco Mauro, San Remo, IT;
Ugo Bolla, Turin, IT;
Francesco Pastorelli, Turin, IT;
Nelson Santamaria, Beinasco, IT;
Marco Ciasullo, Turin, IT;
Other;
Abstract
A method of controlling injection of an engine having an oxygen concentration sensor generating a composition signal correlated to the composition of the exhaust gases, and a number of injectors for injecting fuel for an operating injection time in each operating state of the engine, and each of which is assigned, in each operating state of the engine, a respective calibration injection time determined at an initial engine calibration stage using a reference fuel. In a given operating state of the engine, the control method including the steps of: determining a number of operating values of a control parameter as a function of the composition signal and of a proportional-integral control function; determining an intermediate value of the control parameter as a function of the aforementioned operating values of the control parameter; determining a current correction injection time as a function of the intermediate value of the control parameter, and of a reference value of the control parameter determined at the initial engine calibration stage using the reference fuel and relative to the operating state of the engine; and determining an operating injection time as a function of a calibration injection time relative to the operating state of the engine, of a closed-loop injection time depending on the control parameter, and of the current correction injection time.