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. 13, 2012
Filed:
Nov. 28, 2008
Stefan Haas, Quarnbek / OT Flemhude, DE;
Bert Ritscher, Altenholz, DE;
Bodo Gneist, Dessau-Rossiau, DE;
Horst Ressel, Leutenbach, DE;
Wolfgang Scheibe, Ludwigsburg-Poppenweiler, DE;
Jürgen Schick, Waldenbuch, DE;
Stefan Haas, Quarnbek / OT Flemhude, DE;
Bert Ritscher, Altenholz, DE;
Bodo Gneist, Dessau-Rossiau, DE;
Horst Ressel, Leutenbach, DE;
Wolfgang Scheibe, Ludwigsburg-Poppenweiler, DE;
Jürgen Schick, Waldenbuch, DE;
Caterpillar Motoren GmbH & Co. KG, Kiel, DE;
L'Orange GmbH, Stuttgart, DE;
Abstract
A fuel injection system supplies fuel at high pressure to an internal combustion engine via at least two high-pressure fuel pumps and a high-pressure fuel distribution line. The high-pressure fuel pumps can operate in a first pump mode and a second pump mode, which differ in the amount of fuel that is pumped. A control unit alternately operates the high-pressure fuel pumps such that, during a first time period, at least one of the high-pressure fuel pumps is operated in the first pump mode and all other high-pressure fuel pumps are simultaneously operated in the second pump mode and such that, during a second time period, at least one of the high-pressure fuel pumps, which was operated in the second pump mode during the first time period, is operated in the first pump mode and the remaining high-pressure fuel pumps are simultaneously operated in the second pump mode.