C.r.f. Societa Consortile Per Azioni

Centro Ricerche Fiat Societa' Consortile Per Azioni

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Massimo Ferrera

Riccardo Gozzelino

Filippo Audisio

Pietro Gianotti

Aldo Bassi

Gianpiero Borello

Francesco Vattaneo

Roberto Saretto

Marco Mauro

Aldo Perotto

Dario Rossi

Giuseppe Miletto

Roberto Vitalesta

Irene Vergine

Massimiliano Garganese

An engine is equipped with a gas feeding system, including main gas injectors each associated with an intake duct of a respective engine cylinder, a gas distribution manifold communicating with said main injectors, a gas tank, connected to the manifold, where pressurized gas is accumulated, a controlled pressure valve interposed between the tank and manifold, and a control unit for controlling the pressure valve to establish a gas pressure in the manifold. A spark plug of each cylinder is mounted within a support body that defines a combustion pre-chamber and a channel for auxiliary gas injection within the pre-chamber, communicating with a respective auxiliary gas injector. The auxiliary gas injectors are in communication with the manifold, downstream of the pressure valve. In the channel, a non-return valve and a restricted passage are provided in series, providing for passage of gas flow proportional to a volume of the pre-chamber.

Internal combustion engine with gas feeding system

A control method comprises the steps of: selectively supplying fuel gas to some cylinders of an engine on the basis of the power required from it; selecting the quantity of fuel gas supplied to each of the cylinders; and selecting, in successive engines cycles, different cylinders to supply with fuel gas according to a predetermined scheme of rotation.

Controlling the injection in a fuel system selectively operable with gasoline or fuel gas

A control method comprises the steps of: selectively supplying fuel gas to some cylinders ( ) of an engine ( ) on the basis of the power required from it; selecting the quantity of fuel gas supplied to each of the cylinders ( ); and selecting, in successive engines cycles, different cylinders ( ) to supply with fuel gas according to a predetermined scheme of rotation.

Controlling the injection in a fuel injection system selectively operable with petrol or fuel gas

In an internal-combustion engine designed to operate selectively with gasoline or gas, after each switching of fuel the injectors of the fuel-supply system that has been activated are controlled differently with respect to operation at the normal engine running rate to compensate for the transient phenomena due to the change of fuel.

Process for controlling the phase of switching of fuel in an internal-combustion engine designed to operate selectively with gasoline and gas

In a fuel feeding system for an internal combustion engine adapted to selectively operate with gasoline or with a gas, such as LPG or methane, the engine is compelled to restart automatically in the gasoline mode after a stop during which the gas reservoir has been filled.

Fuel feeding system and method for an internal combustion engine able to

A LPG reservoir for an internal combustion engine adapted to be operated selectively with LPG and gasoline includes a pump unit which has connecting elements for a LPG outlet conduit and a LPG return conduit, as well as a sensor device for sensing the level of LPG in the reservoir.

LPG reservoir for an internal combustion engine adapted to be operated

An internal combustion engine is provided with a methane feed system including a plurality of methane injection devices respectively associated with the various cylinders of the engine. The methane injection devices are mounted within respective seats communicating with a distributing conduit or rail for feeding methane. The seats for the injection devices in the rail are formed in an auxiliary body separate from the intake manifold and the head of the engine. An electronic control unit provides for the control of the injection devices on the basis of signals indicative of the parameters of operation of the engine so as to carry out the methane injection at each cylinder when the rotational speed of the engine is lower than a predetermined threshold when the intake valve of the cylinder is open.

Internal combustion engine with methane injection system

There is described an internal combustion engine able to operate selectively either with gasoline injection or with injection of LPG in a liquid state, which is obtained from an engine able to operate only with gasoline injection.

Growing community of inventors

Turin, Italy

Massimo Ferrera