Patent · US Active

Common rail injection system

US7637252B2 · kind B2 · utility

6Cited by

6References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Uwe Jung · Hungersacker, DE
Janos Radeczky · Wenzenbach, DE
Michael Wirkowski · Regensburg, DE

Key dates

Filing date	May 17, 2007
Grant date	Dec 29, 2009
Priority date	—
Expiry date	May 17, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M55/002
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A common rail injection system for an internal combustion engine has at least one combustion chamber, a high pressure fuel pump for supplying fuel, a high pressure fuel accumulator connected to the high pressure fuel pump for storing fuel pinj at injection pressure in relation to the environment of the common rail injection system, an injector connected to the high pressure fuel accumulator for delivering fuel into the at least one combustion chamber, and a return line for returning fuel from the injector to the high pressure fuel pump. The fuel is pressurized by a return line pressure pdrain in relation to the environment of the common rail injection system. It is proposed that the common rail injection system has an adjusting means for adjusting the return line pressure pdrain. It is additionally proposed to use a pressure control means in the fuel leakage flow feedback system of an internal combustion engine.

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