Abstract: Electromagnetic system to control the valves of an engine and having a control unit and for each valve a respective electromagnetic actuator provided with a pair of electromagnets; each electromagnet has a winding which is provided with a power bobbin and an auxiliary measurement bobbin, and a flexible connection cable, which is directly integrated in the respective winding in order to connect the winding itself to the control unit electrically without further interpositions.

Abstract: An internal combustion engine comprising at least one intake valve and/or exhaust valve moving axially between a closed position and a position of maximum opening and means for moving the valves adapted to move, on command, this valve between the closed position and the position of maximum opening, the valve movement means comprising an elastic member adapted to maintain this valve in the closed position, a hydraulic actuator selectively adapted to move this valve from the closed position to the position of maximum opening by countering the action of the elastic member, and a hydraulic circuit adapted to supply pressurized fluid to the hydraulic actuator, the hydraulic circuit comprising a delivery duct connected to the hydraulic actuator and pumping means adapted to supply pressurized fluid into the delivery duct, the pumping means comprising the elastic member and the hydraulic actuator.

Abstract: An electrically controlled three-way valve comprising a valve body, within which a central cavity and a respective first, second and third connection duct, adapted to bring the central cavity into communication with atmosphere, are provided, and a shutter member mounted to move within the central cavity between a first operating position, in which the shutter member is disposed to close the inlet of the first duct so as to obstruct this first duct in a leak-tight manner and to bring the second duct into sole communication with the third duct, and a second operating position in which the shutter member is disposed to close the inlet of the third duct in order to obstruct this third duct in a leak-tight manner and to bring the second duct into sole communication with the first duct; the shutter member being of spherical shape and independent from any other member of the valve so that it can move freely within the central cavity; the central cavity being shaped such that the shutter member is forced simultaneous

Abstract: An electromagnetic actuator for the actuation of the intake or exhaust valves of an internal combustion engine in which an oscillating arm has a first end hinged on a support frame secured to the engine head and a second end in abutment on the upper end of the stem of the intake or exhaust valve; two electromagnets being provided in order to move, on command, the oscillating arm in order axially to displace the valve between a closed position and a position of maximum opening, the oscillating arm comprising a central plate positioned in the space between the polar heads of the two electromagnets, a cylindrical tubular member rigid with a lateral edge of the central plate and a projection extending in a projecting manner from the central plate on the side opposite the cylindrical tubular member, the central plate being formed by a pack of sheets of ferromagnetic material stacked on one another and seam welded on the outer lateral surface of the cylindrical tubular member and by a stiffening rib welded to the p

Abstract: Electrohydraulic device for operating an intake or exhaust valve of a combustion engine; the electrohydraulic device comprises a linear hydraulic actuator designed to move the valve axially from a closed position to a maximum opening position, and an electronic control hydraulic distributor designed to regulate the flow of pressurised liquid from and towards the linear hydraulic actuator in order to control movement of the above-mentioned valve between the closed and maximum opening positions; the electronic control hydraulic distributor comprises a slide valve which, by selection, can be set to three positions: a first operating position in which it establishes direct communication between the linear hydraulic actuator and an outlet of the pressurised liquid, a second operating position in which it isolates the linear hydraulic actuator in such a way as to prevent the flow of pressurised liquid from or towards the actuator, and a third operating position which establishes direct communication between the lin

Abstract: An electromagnetic actuator for the control of the intake or exhaust valves of an internal combustion engine, in which an oscillating arm has a first end hinged on a fixed support and a second end in abutment, directly or via the interposition of a strut, on the upper end of the stem of the intake or exhaust valve, two electromagnets being provided in order to move, on command, the oscillating arm so as axially to displace the valve between a closed position and a position of maximum opening, a first and a second elastic member being provided to maintain the intake or exhaust valve respectively in the closed position and in the position of maximum opening, by exerting on the valve axial thrusts contrary to one another; in the balanced position, the two elastic members are adapted to maintain the valve in an intermediate position between the closed position and the position of maximum opening.

Abstract: Electromagnetic actuator of an improved type for controlling the valves for induction or exhaust of an internal-combustion engine, wherein an oscillating arm has a first end which is pivoted on a support frame which is secured to the head of the engine, and a second end which abuts the upper end of the stem of the valve for induction or exhaust; two electromagnets being provided to move the oscillating arm by command, such as to displace the said valve axially, between a position of closure and a position of maximum opening; the frame being pivoted on the head of the engine, such as being able to rotate around an axis of rotation, which is perpendicular to the axis of movement of the valve for induction or exhaust, and the electromagnetic actuator also being provided with a device to regulate the position of the frame relative to the head, which device can rotate the said frame by command around the said axis of rotation, such as to be able to maintain at a pre-determined value the mechanical play which exist

Abstract: An internal combustion engine comprising at least one intake valve and/or exhaust valve moving axially between a closed position and a position of maximum opening and means for moving the valves adapted to move, on command, this valve between the closed position and the position of maximum opening, the valve movement means comprising an elastic member adapted to maintain this valve in the closed position, a hydraulic actuator selectively adapted to move this valve from the closed position to the position of maximum opening by countering the action of the elastic member, and a hydraulic circuit adapted to supply pressurized fluid to the hydraulic actuator, the hydraulic circuit comprising a delivery duct connected to the hydraulic actuator and pumping means adapted to supply pressurized fluid into the delivery duct, the pumping means comprising the elastic member and the hydraulic actuator.

Abstract: 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.

Abstract: An electromagnetic actuator for the actuation of the intake or exhaust valves of an internal combustion engine in which an oscillating arm has a first end hinged on a support frame secured to the engine head and a second end in abutment on the upper end of the stem of the intake or exhaust valve; two electromagnets being provided in order to move, on command, the oscillating arm in order axially to displace the valve between a closed position and a position of maximum opening, the oscillating arm comprising a central plate positioned in the space between the polar heads of the two electromagnets, a cylindrical tubular member rigid with a lateral edge of the central plate and a projection extending in a projecting manner from the central plate on the side opposite the cylindrical tubular member, the central plate being formed by a pack of sheets of ferromagnetic material stacked on one another and seam welded on the outer lateral surface of the cylindrical tubular member and by a stiffening rib welded to the p

Abstract: Fuel injector, comprising a main tubular body, provided with at least one through pipe which ends in a spray nozzle which can spray the fuel present inside the through pipe, and a shutter unit, which is mobile axially inside the through pipe, from and towards a position of closure, in which the shutter unit itself abuts a sealing surface provided on the spray nozzle, and seals it in a fluid-tight manner; the shutter unit being made of a cup-type body, the base of which is defined by a sealing disc made of flexible material, on which there are provided an annular sealing projection and an annular stop projection, which is co-axial relative to the former; the annular stop projection having a height which is lower than the annular sealing projection, such as to abut the sealing surface of the spray nozzle only temporarily, subject to resilient deformation of the sealing disc itself.

Abstract: An internal combustion engine with electromagnetically actuated valves comprising a variable volume combustion chamber, at least one suction duct connecting the combustion chamber with the suction manifold of the engine and at least one exhaust duct connecting the combustion chamber with the exhaust manifold of the engine, the internal combustion engine further comprising, for each suction and exhaust duct, a respective mushroom valve that can move from and to a closed position in which it closes the duct and an electromagnetic actuator adapted on command to move the valve to and from the closed position, the internal combustion engine further comprising, for at least one of the valves, a device for balancing the pressures exerted on the head of the valve and adapted to balance the pressure forces that tend to oppose the opening of this valve.

Abstract: 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.

Abstract: A valve comprising a plunger controlled by an electromagnet and in turn controlling fuel flow through an injection orifice; the plunger being defined by a cylindrical lateral surface mating in sliding manner with a corresponding cylindrical guide surface of a seat formed in the valve body. According to the present invention, the barycenter of the plunger lies in a plane of the valve perpendicular to the valve axis, and the distance between which plane and the mid plane of the cylindrical guide surface is less than 2 mm.

Abstract: The present invention involves an electromagnetically actuated fuel atomizing and metering valve. The valve has a metal body housing an electromagnet, a core, and an injection nozzle. The injection nozzle has at least one fuel injection orifice passage controlled by a movable shutter member fixed to an armature. The shutter member controls the passage of fuel through the injection orifice and comprises a disc delimited by a cylindrical outer lateral surface which has substantially the same diameter as the outer surface of the armature. The disc is connected to the armature by laser welding between the upper circular edge of the disc and the lower circular edge of the armature.

Abstract: A valve substantially comprising a first tubular body having a wall of substantially constant thickness in which is formed at least a pair of openings; a second annular body incorporating an electromagnet and presenting a pair of radial projections, and a block forming a seat for an electric connecting element connected to the electromagnet, the projections being designed to fit inside the openings in the first body; and a third body defining an axial sleeve designed to fit inside the electromagnet for forming a core, and an annular collar projecting radially from the sleeve and designed to fit inside the wall of the first body.

Abstract: The valve substantially comprises a ferromagnet element provided with a flat bottom wall in which is formed an injection orifice, a first annular wall, adapted to house a movable shutter member and at least partially house an armature fixed to the member itself, and a second annular wall coaxial with the first and adapted to house the lower end of a core and a sealing ring interposed between the wall and the core; the valve further includes a tubular casing of sheet metal adapted to contain an electromagnet and the core, and the lower end of the casing overlying at least a part of the wall of the ferromagnet element and being fixed to this by laser welding.

Abstract: A coil substantially comprising an annular winding of electric wire for producing a magnetic field in a coil integral with the valve body, and an anchor integral with a plunger; the ends of the winding wire being connected electrically to a pair of pins secured to a casing housing the winding itself; characterized by the fact that each pin presents an axial hole through which is threaded a portion of the winding wire, the end of which portion projects from one end of the pin and is connected to the same by a weld.

Abstract: 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.

Abstract: The valve comprises a casing, a shutter member axially movable within it, a core of magnetic material also disposed within the casing, an armature fixed to the shutter member and an excitation winding disposed within a cavity of annular form defined between the casing, the core and the armature; a predetermined clearance is left between the surfaces which delimit the excitation winding and the surfaces of the said cavity in such a way as to form channels for the passage of fuel to allow this to wash completely over the surfaces which delimit the excitation winding.