Robert Boschgmbh

Michael Scharf

Karl Konrath

Klaus Krieger

Hannes Pflug

Karl-Friedrich Russeler

Helmut Simon

Mohammad-Ali Khosrawi

Joerg-Peter Fischer

Christian Taudt

Paul Wuetherich

Thomas Fortenbacher

Wolfgang Goll

Rolf-Juergen Giersch

Berni Reisser

A pressure sensor for detecting the pressure of a medium bounded by a wall, in particular for detecting the pressure in the pump work chamber of a fuel injection pump, with a housing that is disposed in a through bore of the central screw plug of the fuel injection pump. The housing has a separate front housing part, which is welded to a measuring element support and together with this measuring element support, a measuring element, a pressure transmission element, and a membrane that constitutes the bottom of the front housing part, constitutes a measurement head that is definitely braced in the pressure transmission direction and cannot be disassembled. The measurement head contacts the through bore and other components of the pressure sensor exclusively by way of an outer flange, which is disposed on the outer circumference of the measurement head.

Pressure sensor for detecting the pressure in a pump work chamber of a

The invention is based on a fuel injection pump in which to supply a very rapid pressure rise in the interior of a fuel injection pump, a pressure valve controlling this pressure is modified such that upon cold starting of the engine, the pressure valve closes a bypass line at the feed pump and thus delivers all the fuel to the fuel injection pump. The closure is effected as a function of rpm and accordingly pressure, and also as a function of the engine operating temperature; in the fuel injection pump according to the invention, the rpm- and pressure-dependent diversion is performed by the adjusting piston of an injection adjuster. Thus, compared with the known cold-starting accelerating devices, one additional pressure limiting valve can be eliminated.

Fuel injection pump for internal combustion engines

Fuel injection pump

Growing community of inventors

Wolfenbuettel, Germany

Michael Scharf