Patent · US Expired

Device for temperature responsive switching of overflow fuel quantities of a diesel fuel injection pump

US4574762A · kind A · utility

19Cited by

9References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Willi Muller
Hans Schacht · Murrhardt, DE
Erich Scholz · Weinheim, DE
Max Straubel · Stuttgart, DE

Key dates

Filing date	Dec 6, 1984
Grant date	Mar 11, 1986
Priority date	—
Expiry date	Dec 6, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a device for temperature responsive switching of overflow fuel quantities from a diesel fuel injection pump to a fuel supply tank or a filter of a fuel supply system a switching valve, arranged between the fuel injection pump and the tank, is actuated by a bimetallic element. Parallel to the switching valve is provided a throttle for continuous air venting. A pressure control valve with a low opening pressure is installed in the connection between the switching valve and the filter. The heated overflow fuel quantities are mixed with cool fuel from the tank and therefore the danger of clogging of the filter, which could be caused by paraffin separation, is substantially reduced.

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