Volvo Truck Corporation

Renault Trucks

Guillaume Millet

Nicolas Dronniou

Thomas Grange

François Giroud

Yannick Sailler

Mourad Hedna

Clement Starc

Julien Bouchot

The invention relates to a device () for a common rail fuel injection system (), wherein the device () comprises a one-piece module () which comprises a common fuel line () and a plurality of injector bodies () in fluid communication with the common fuel line (). The present invention also relates to a vehicle () comprising such a device (). The present invention also relates to a method of manufacturing a device () for a common rail fuel injection system ().

Device for a common rail fuel injection system

A fuel injection system of an internal combustion engine includes: an injector having a hydraulic control chamber controlling the delivery of fuel through the injector, an actively controlled first valve system controlling the pressure relief from the control chamber, movable between: a first position in which the first valve system closes the injector by deterring the pressure from being relieved from the control chamber through the first relief circuit, and a second position in which the first valve system opens the injector by allowing the pressure to be relieved from the control chamber through the first relief circuit. A second relief circuit allows the pressure to be relieved from the control chamber through the second relief circuit. The second relief circuit includes a second valve system passively controlled by the fuel pressure and movable between two positions deterring or allowing the pressure to be relieved from the control chamber through the second relief circuit.

Injection system of an internal combustion engine and automotive vehicle including such an injection system

A cover for an internal combustion engine assembly that includes a pressurized fuel accumulator feeding fuel to at least one injector is provided, the cover defining, with a cylinder head, a volume designed to receive the common rail and the injector. The cover borders a first sub-volume, designed to receive the injector, and a second sub-volume separated from the first sub-volume by a separation wall of the cover and designed to receive the common rail. The cover includes a frame to be fitted on the cylinder head and a cap removably fitted on the frame. The separation wall is designed for the passage of a fuel connection connecting the injector to the common rail.

Cover of an internal combustion engine assembly having a common rail, engine assembly and automotive vehicle including such a cover

In a fuel system for delivering pressurized fuel both to an internal combustion engine and to an exhaust installation, the fuel system includes two separate branches for delivering fuel to the internal combustion engine and to the exhaust installation, and includes a primary fuel pump delivering fuel to both branches of the fuel supply circuit. The primary fuel pump output is controllable independently of the engine speed. The pump output may be controlled such that the pressure of fuel in the fuel supply circuit depends on whether fuel is to be delivered to the exhaust installation. The fuel system may include a hydraulically controlled shut-off valve arrangement which is forced to switch depending on the pressure in the fuel supply circuit.

Fuel system for an internal combustion engine arrangement

A nozzle assembly includes a first needle and a second needle controlling respectively fuel flow towards a first series of outlets and a second series of outlets. It includes a passive control valve adapted to select, on the basis of the fuel feeding pressure, the needle to be activated for fuel delivery to the combustion chamber of an internal combustion engine. An injector with such an assembly is economic and efficient to spray fuel with two different patterns.

Nozzle assembly a fuel injector and an internal combustion engine comprising such an injector

This fuel injector assembly () is used to inject fuel into a combustion chamber () of an engine. It comprises a needle control unit () adapted to actuate a needle () to deliver fuel to the chamber (), an amplifier unit () adapted to increase the pressure of a quantity of fuel coming from an accumulator () of fuel under pressure and a cam () driven feeder unit () adapted to feed the accumulator () with fuel under pressure. No external pump is needed to feed the accumulator ().

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Luzinay, France

Guillaume Millet