Magneti Marelli S.p.a.

Weber S.r.l.

Magneti Marelli Powertrain, S.p.a.

Massimo Lolli

Marcello Cristiani

Massimo Mattioli

Michele Petrone

Daniele De Vita

Enrico Vezzani

Rino Stagni

Stefano Petrecchia

Francesco Paolo Loperfido

The present invention relates to a fuel injector. The fuel injector is provided with an injection nozzle, an injection valve, and an electromagnetic actuator. The injection valve has a movable needle to adjust the flow of fuel through the injection nozzle. The electromagnetic actuator is adapted to move the needle between a closing position and an opening position of the injection valve and is provided with a movable plunger which is mechanically connected to the needle and has at least one feeding through hole for the passage of fuel towards the injection nozzle. The plunger is provided with a hydraulic type braking device, which is coupled to the feeding hole and hydraulically dissipates kinetic energy to slow down the opening stroke of the needle when the needle moves towards the opening position of the injection valve.

Electromagnetic fuel injector with braking device

A fuel injector comprising: an injection valve provided with a mobile needle to regulate the fuel flow; an actuator adapted to shift the needle; an injection nozzle; a supporting body having a tubular shape and displaying a feeding channel; a sealing body provided with a valve seat of injection valve and comprising a disc-shaped capping element, which lowerly and fluid-tightly closes the feeding channel and is crossed by the injection nozzle, and a guiding element, which rises from the capping element, has a tubular shape, and accommodates the needle therein; an external fuel guiding channel defined between the feeding channel and the guiding element; a number of through feeding holes obtained in the lower part of the guiding element and leading towards valve seat; and a shutter head having an essentially spherical adjustment zone, which is integral with the needle, externally engages the guiding element.

Fuel injector for a direct injection internal combustion engine

A high pressure pumping device having a body provided with a cylindrical seat and a piston mounted in an axially sliding manner in the seat in order to form a variable volume pumping chamber; the chamber being in communication with an intake duct, via which it is supplied with a fluid, and with a delivery duct along which there is disposed a one-way non-return valve in order to allow the fluid to flow from the pumping chamber along this delivery duct; the pumping device further comprising an electrovalve whose opening and closing is controlled, disposed along the intake duct in order to enable the fluid to flow from and to the pumping chamber, and a control unit adapted to control the opening of the electrovalve in order to cause a controlled quantity of fluid to flow back from the chamber to the intake duct, enabling the regulation of the quantity of fluid pumped, at high pressure, along the delivery duct.

High pressure pumping device

A unit for supplying fuel to an endothermal engine, the unit comprising a manifold to which injectors are connected in order to supply fuel to the engine, a high pressure pumping device which has its output connected to the manifold and its intake connected to an extraction pump adapted to transfer fuel from the storage tank to this device and a pressure regulator adapted to regulate the pressure of the fuel supplied to the pumping device by supplying surplus fuel along a bleed duct communicating with the tank, the pumping device having at least one piston moving axially within a respective cylinder in order to define a variable volume pumping chamber. The supply unit has a leakage channel provided with a first mouth communicating with the cylinder below the pumping chamber and a second mouth communicating with the bleed duct, and an ejector disposed in the bleed duct at the location of the second mouth in order to recall along the leakage channel fuel leaking from the pumping chamber between the piston and the cylinder.

Fuel supply unit for an endothermal engine

A process for the manufacture of a fuel manifold designed to supply fuel to a number of fuel injectors includes forming the end of each of a number of cup shaped fittings into a rod having an axial hole, forming on an elongated semifinished metal part a series of seats for the aforementioned rods, inserting the rods inside the seats an permanently deforming the rods against the respective seats for securing the fittings to the semifinished metal part.

Process for the manufacture of a fuel manifold for an internal

The present invention is a valve comprising a cylindrical supporting body having a first axial cavity housing an electromagnet and a core, and an axial hole communicating with the cavity and housing an anchor integral with a mobile plugging member; and a nozzle secured to the supporting body and in which is formed a fuel outlet hole controlled by the aforementioned plugging member. The supporting body presents a first and second series of holes designed to enable external communication, through the lateral surface of the supporting body, of the axial hole formed inside the body itself; the holes in one series being separated from those of the other in the direction of the body axis. The present invention provides for efficient metering and atomizing performance under all operating conditions.

Growing community of inventors

Bologna, Italy

Massimo Lolli