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:
Apr. 03, 2007
Filed:
May. 12, 2005
Francesco Ausiello, Bologna, IT;
Gabriele Serra, San Lazzaro Di Savena, IT;
Francesco Ausiello, Bologna, IT;
Gabriele Serra, San Lazzaro Di Savena, IT;
Magneti Marelli Powertrain SpA, Corbetta, IT;
Abstract
A method and system for the direct injection of fuel into an internal combustion engine, according to which a high-pressure pump with a variable flow rate supplies the fuel to a common rail, which in turn supplies the fuel to a series of injectors; the flow rate of the high-pressure pump is controlled by choking each pump stroke by varying the closure time of an intake valve of said high-pressure pump; for each pump stroke of the high-pressure pump, at least one intermediate gap is generated in said pump stroke during which the pumping pressure is substantially reduced to zero so as to subdivide symmetrically the choking of the pump stroke into a first choking action at the beginning of the pump stroke and a second choking action immediately after the intermediate gap.