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:
Nov. 14, 1978
Filed:
May. 10, 1977
Applicant:
Inventors:
Vittorio Di Nunzio, Turin, IT;
Umberto Bigliani, Leumann-Collegno (Turin), IT;
Assignee:
Fiat Societa per Azioni, Turin, IT;
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73118 ; 73213 ;
Abstract
The quantity of air inducted in a four cylinder Otto engine with fuel injection and an inlet throttle for each cylinder is determined by indirect measurement, unaffected by atmospheric pressure variations. The induction air pressure is measured by a transducer located between one of the throttles and its associated cylinder inlet valve, and the pressure is sampled, using an electronic gating system responsive to engine speed, within a precisely defined range (preferably 15.degree.-25.degree. after bottom dead center) of engine crankshaft angle.