Weber S.r.l.

Magneti Marelli Powertrain, S.p.a.

Fiat Auto S.p.a.

Other

Solex

Ercole Marelli & C. S.p.a.

Magneti Marelli S.p.a.

Francesco Paolo Ausiello

Mario Ricco

Gabriele Serra

Matteo De Cesare

Sisto L De Matthaeis

Philippe Wallerand

Sergio Turchi

Olivier Quelenis

Umberto Agazzone

A method for controlling the overpressure in a fuel-supply system of a common-rail type for an internal-combustion engine provided with a number of cylinders; the method has the steps of: supplying fuel under pressure to a common rail connected to a number of injectors by means of a high-pressure pump; detecting the effective value of the pressure of the fuel within the common rail; comparing the effective value of the pressure of the fuel within the common rail with a safety value; determining a condition of emergency if the effective value of the pressure of the fuel within the common rail is higher than the safety value; and driving, in the case of emergency, the injectors for discharging part of the fuel present in the common rail so as to contain the increase in pressure of the fuel within the common rail.

Method for controlling the overpressure in a fuel-supply system of a common-rail type

A method and system for the direct injection of fuel into an internal combustion engine, according to which a high-pressure pump with a variable flow rate supplies the fuel to a common rail, which in turn supplies the fuel to a series of injectors; the flow rate of the high-pressure pump is controlled by choking each pump stroke by varying the closure time of an intake valve of said high-pressure pump; for each pump stroke of the high-pressure pump, at least one intermediate gap is generated in said pump stroke during which the pumping pressure is substantially reduced to zero so as to subdivide symmetrically the choking of the pump stroke into a first choking action at the beginning of the pump stroke and a second choking action immediately after the intermediate gap.

Method and system for the direct injection of fuel into an internal combustion engine

A method for the direct injection of fuel into an internal combustion engine, wherein a high-pressure pump with a variable flow rate supplies the fuel to a common rail, which in turn supplies the fuel to a series of injectors; the flow rate of the high-pressure pump is controlled by choking each pump stroke by varying the closure time of an intake valve of said high-pressure pump; the mechanical actuation of the high-pressure pump is timed so that each injection interval is located at the beginning of a respective choking action; and each pump stroke is choked by at least an angular interval having a duration no shorter than that of the injection intervals irrespective of the quantity of fuel to be supplied to the common rail in such a way that the injection phase of each injector always takes place when the high-pressure pump is not pumping fuel to the common rail.

Method for the direct injection of fuel into an internal combustion engine

Engine control system with motorized butterfly body

The subject of the invention is an improvement in the pilot valve which is adapted to control the passage of fuel through a discharge aperture which communicates with a control chamber with which the device is provided; fuel is supplied under pressure into this control chamber and is discharged through the first mentioned discharge aperture to control the opening of a shutter needle with which the device is provided for the purpose of injecting a suitable quantity of fuel through at least one injection orifice. According to this improvement the armature of the pilot valve substantially comprises a rod which traverses an axial hole in the core of an electromagnet. The first end of the rod is fixed to the armature. A stop member, the position of which is adjustable with respect to the body of the device, is adapted to constitute an abutment for the second end of the rod. A ball is interposed between this second end and the stop member. A threaded ring nut presses against the elongate body housing the needle so as to fix the valve body and resist the force on the valve body exerted by the fuel under pressure.

Electromagnetically actuated fuel injection device for an internal

A perfected fuel injector comprising a plunger for controlling fuel passage between an injection chamber and at least an injection orifice formed in an injection nozzel; and an electromagnetic fuel metering valve for controlling fuel passage through a drain orifice between a control chamber, supplied with fuel under pressure, and a low-pressure chamber, so as to reduce to a given value the pressure of the fuel inside the control chamber and so displace the plunger. Pressurized fuel is supplied to the injection chamber and control chamber by means of a single fitting connected to a supply pipe and coming out inside a supply orifice formed in the injector body and communicating with the control chamber and with a duct supplying fuel to the injection chamber and comprising an annular chamber and a radial hole formed in a sleeve housed in a hole on the body.

Perfected diesel engine electromagnetic fuel injector

An electromagnetically-controlled fuel injection valve for diesel engines includes an electromagnetic metering valve which controls communication between a control chamber supplied with fuel under pressure through an inlet hole, and a discharge hole. The solenoid metering valve includes a ball obturator movable in a cavity of the body defined by two annular valve seats of which the first defines the discharge hole and the second communicates with the inlet hole. The cavity is in communication with the control chamber through lateral passages. The ball obturator is kept in a closed position against the second seat by means of an electromagnetically-operated axial push rod.

Electromagnetically-controlled fuel injection valve for I.C. engines

A fuel-injection pump for diesel-engine injection system, comprising at least one cylinder-piston unit with an associated intake valve for the introduction of fuel delivered by an electrical supply pump, and a delivery duct. Electronic means are provided for modulating the electrical supply pump to vary the pressure of the fuel taken in by the cylinder-piston unit and consequently the bottom dead center position of the piston and hence the length of its pumping stroke.

Fuel-injection pump with variable cylinder capacity for diesel engine

A fuel injection system with controlled injectors for diesel engines includes a system for regulating the temperature of the fuel, including thermostatically-controlled preheating means associated with the fuel supply circuit and electronically-controlled cooling means associated with the fuel recycling circuit.

Fuel injection system with controlled injectors for diesel engines

A modular power plant comprises an internal combustion engine coupled to an electrical machine. The electrical machine may be used to start the engine and to generate electrical energy. The power plant is provided with an electronic control and protection system comprising an electronic processing and control unit arranged to operate in a first mode when the power plant is used alone, and in a second mode when the power plant is used together in a coordinated manner in an installation comprising a further n power plants. In this second mode of operation the processing and control unit may act as a master unit for controlling and coordinating the operation of the processing and control units of the other n power plants in a predetermined manner, or as a slave unit controlled by another control and processing unit of one of the other n power plants. Means are provided for assigning the roll of master unit to one of the control and processing units of the n+1 power plants.

Modular power plant for the combined production of electrical and

A power-generating installation comprises a plurality of modular power plants each comprised of an internal combustion engine connected to an electric machine. The electric machine is used to start the engine and thereafter operates as a generator supplying power to an electrical network common to all the modular plants. The installation has a control and protection system comprising a plurality of control modules each associated with a respective plant, and a central unit passing control signals to the modules to control starting and stopping of the individual power plants. Upon the detection of abnormal operation or failure of its associated power plant, each control module transmits an alarm signal back to the central unit which thereupon stops, or prevents the starting, of the corresponding power plant. Parameters monitored by each control module include generated current and inter-winding leakage current of the electric machine.

Growing community of inventors

Bologna, Italy

Francesco Paolo Ausiello