Patent · US Active

System and method for preventing overheating of a fuel pump

US8307810B2 · kind B2 · utility

2Cited by

6References

25Claims

0Family size

Assignees

Caterpillar Motoren GmbH & Co. KG · DE
L'Orange GMBH · DE

Inventors

Stefan Haas · Bellinzona, CH
Bert Ritscher · Altenholz, DE
Bodo Gneist · Dessau, DE
Horst Ressel · Winnenden, DE
Wolfgang Scheibe · Waiblingen, DE
Jurgen Schick · Himbach, DE

Key dates

Filing date	Nov 28, 2008
Grant date	Nov 13, 2012
Priority date	—
Expiry date	Apr 4, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/0602
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.