Robert Boschgmbh

Sascha Ambrock

Friedrich Boecking

Andreas Dutt

Achim Koehler

Stefan Kieferle

Burkhard Boos

Walter Fuchs

Christian Langenbach

Arnold Gente

Matthias Distel

Karl-Friedrich Ruesseler

Marco Lamm

Andreas Holl

Marcus Kristen

Dietmar Ottenbacher

Joerg Wuerz

Peter Bauer

Frank Zehnder

Ulrich Maier

Natalie Boehm, Legal Representative

Jacqueline Boehm, Legal Representative

Petra Boehm, Legal Representative

Martin Klander

Jaroslav Zivny

Karsten Ruth

Karl-Heinz Traub

Saban Akmese

Bertram Schweitzer

Stefanie Geiselhart

Thomas Boehm

The invention relates to a high-pressure fuel pump comprising a drive shaft supported by bearings, and fuel flows through the bearings in a forced manner in such a way that the mechanical and thermal load-carrying capacity of the bearings, and thus the entire high-pressure fuel pump, is significantly increased.

Fuel injection system for an internal combustion engine

Disclosed is a fuel metering unit for high-pressure pumps of fuel injection systems, whose leakproofness in zero delivery operation has been further improved and whose manufacture and assembly have been simplified.

Fuel metering unit for the fuel injection system of a combustion engine

A high-pressure a radial piston fuel pump in which the intake valves are embodied as ball valves, which has an advantageous effect on the efficiency of the high-pressure fuel pump. Moreover, the production and assembly of the high-pressure fuel pump of the invention are simplified by the use of ball valves.

High-pressure fuel pump with a ball valve in the low-pressure inlet

A fuel injection apparatus having a fuel supply pump supplying fuel to a high-pressure pump which delivers fuel into a reservoir with a metering device for adjusting the fuel quantity delivered into the reservoir; the metering device has a control valve triggered by an actuator. The control valve has a valve element guided in a cylinder of a valve housing can be slid by the actuator in opposition to a spring and in cooperation with an opening in the cylinder bore connected to an inlet from the supply pump or an outlet to the high-pressure pump, controls a flow cross section from the supply pump to the high-pressure pump. The valve element can close the flow cross section at least almost completely and also control a connection of the inlet from the supply pump or of the outlet to the high-pressure pump to a discharge region, and open this connection when it closes the flow cross section.

Fuel injection device for an internal combustion engine

The fuel injection system has a high-pressure pump, by which fuel is pumped at high pressure into a reservoir. By means of a feed pump, fuel is pumped from a fuel tank to the high-pressure pump. By means of a fuel metering device, disposed between the feed pump and the high-pressure pump, the inflow of fuel to the high-pressure pump is adjusted. From the connection between the feed pump and the fuel metering device, a bypass connection leads away to a relief region. An inflow of fuel from the feed pump to the fuel metering device and/or to the bypass connection is effected through at least one conduit in a housing part, and in the at least one conduit, at least one fuel filter is disposed upstream of the fuel metering device and/or of the bypass connection.

Fuel injection system having a feed pump by which fuel is pumped out of a fuel tank to the intake side of a high-pressure pump pumps fuel into a reservoir as a function of engine operating parameters. A fuel metering device is provided for adjusting the fuel quantity pumped into the reservoir by the high-pressure pump. An electrically actuated blocking valve is disposed between the feed pump and the high-pressure pump, and by means of this valve the high-pressure pump can be disconnected completely from the feed pump. By means of the blocking valve, it can still be attained that no fuel is pumped by the high-pressure pump even if the fuel metering device does not provide complete sealing.

Fuel-injection device for an internal combustion engine

The fuel injection system has a high-pressure pump, by which fuel is pumped into a reservoir, with which injectors disposed on cylinders of the engine communicate. A feed pump pumps fuel out of a fuel tank to the high-pressure pump and a fuel metering device triggered by a control unit and disposed between the feed pump and the high-pressure pump controls the fuel quantity delivered to the high-pressure pump. The fuel metering device is formed by a clocking valve, which is opened and closed in pulse-width-modulated fashion by the control unit, and the fuel quantity delivered to the intake side of the high-pressure pump is proportional to the opening duration of the clocking valve.

The fuel injection system has a high-pressure pump which pumps fuel into a reservoir to be supplied to injectors disposed at the engine cylinders. A feed pump supplies fuel to the high-pressure pump. The high-pressure pump has at least one pump element including a pump piston that defines a work chamber and is driven in a reciprocating motion; the work chamber has a communication with the compression side of the feed pump, in which an intake valve opening toward the work chamber is disposed, and through which valve fuel flows into the work chamber upon the intake stroke of the pump piston. The intake valve has a valve member, which is urged in a closing direction by a closing spring, and the closing spring is braced at least indirectly on the pump piston; with an increasing intake stroke of the pump piston, the closing force exerted on the valve member by the closing spring becomes less. A minimal opening differential pressure of the intake valve is less than 0.9 bar.

The fuel injection device has a high-pressure pump () that supplies fuel to a reservoir and is connected to injectors disposed in the cylinders of the engine. A fuel-supply pump delivers fuel from a fuel tank to the suction side of the high-pressure pump. An electrically actuated control valve adjusts the quantity of fuel that the high-pressure pump delivers to the reservoir. The control valve is disposed on the pressure side of the high-pressure pump and can be switched between a first position, in which the pressure side of the high-pressure pump is closed off from a pressure relief region, and a second position, in which the pressure side of the high-pressure pump is connected to the pressure relief region.

Growing community of inventors

Gerlingen, Germany

Sascha Ambrock