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:
Sep. 07, 2004
Filed:
Jan. 08, 2003
Mark Spencer Stuhldreher, Pinckney, MI (US);
Andrew James Moskalik, Detroit, MI (US);
The United States of America as represented by the Environmental Production Agency, Washington, DC (US);
Abstract
A common rail intensifier fuel injection system includes a plurality of fuel injectors respectively associated with cylinders of an internal combustion engine. A common rail supplies fuel at an intensified pressure to the fuel injectors and receives the fuel at the intensified pressure, alternately, from at least two fuel pressure intensifying circuits. At least one of the fuel pressure intensifying circuits includes a fuel pressure intensifier having an operating chamber for receiving and discharging an operating fluid, and a fuel chamber of a diameter smaller than that of the operating chamber for receiving fuel at a low pressure from the fuel supply and discharging the fuel at the intensified pressure into one of the fuel pressure intensifying circuits. A control valve, in a first position, connects the operating fluid source with the operating chamber of the fuel pressure intensifier and, in a second position, connects the operating chamber of the fuel pressure intensifier with a drain. A controller switches the control valve between the first and second positions and switches the supply of fuel at the intensified pressure, to the common rail, between the various fuel pressure intensifying circuits.