US 5,433,182 AGranted

Fuel injection system for a multi-cylinder diesel engine

AssigneeMercedes-Benz AG

InventorsUlrich Augustin, Volker Schwarz, Hermann Hiereth

Life of this patent

Estimating the term…

Loading patent…

Abstract

In a fuel injection system for a multi-cylinder Diesel engine which is provided with magnetic valve-controlled fuel injection nozzles, and which has two fuel supply conduits (common rails) for two different groups of fuel injection nozzles and at least one high-pressure pump connected to the fuel supply conduits for delivering high-pressure fuel thereto, each fuel supply conduit includes a pressure sensor which is connected to means for shutting off the fuel supply to a fuel supply conduit when the sensor senses a pressure loss in that conduit so that the pressure can be maintained in the other fuel supply conduit and the engine can be operated on a limited basis by the cylinders supplied by the groups of injection nozzles supplied with fuel by the other fuel supply conduit.

Claims6

Dependent claims

A fuel injection system for a multi-cylinder Diesel engine provided with magnetic valve-controlled fuel injection nozzles, said system comprising at least two fuel supply conduits, one for supplying pressurized fuel to some of said fuel injection nozzles and the other for supplying fuel to the other of said fuel injection nozzles, at least one high-pressure fuel pump connected to said fuel supply conduits for delivering thereto fuel under pressure, means for controlling the supply of fuel to said fuel supply conduits and pressure sensors arranged so as to sense the fuel pressure in each of said fuel supply conduits and connected to means for operating said fuel supply control means, said means for operating said fuel supply control means being adapted to interrupt the supply of fuel to a particular fuel supply conduit when the respective sensor senses a pressure loss in the particular fuel supply conduit.

Dependencies are inferred from the claim text.

Facts

Application: 08/322,938Filed 13 Oct 1994
Priority: DE 43 35 171.915 Oct 1993
Granted: 18 Jul 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F02M 69/465
Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down: of fuel rails
F02D 41/0087
Controlling each cylinder individually: selective cylinder activation, i.e. partial cylinder operation
F02D 41/221
Safety or indicating devices for abnormal conditions: relating to the failure of actuators or electrically driven elements
F02D 41/3827
Common rail control systems: for diesel engines