Abstract: A fluid pressure regulator includes a regulation chamber arrangement in which a piston is received, in the regulation chamber arrangement, a first chamber and a second chamber being defined by opposite parts of the piston. The first chamber and the second chamber include respectively a first inlet and a second inlet for the fluid, the first inlet and the second inlet being connected to a first environment at a first pressure. The first chamber and the second chamber include respectively a first outlet and a second outlet for the fluid, the first outlet and the second outlet being connected to a second environment at a second pressure. The piston is movable in the regulation chamber arrangement in response to a variation of pressure of the fluid in the first chamber to open/close the second outlet to regulate the second pressure. The fluid pressure regulator includes a valve device to open/close the first outlet to induce the pressure variation in the first chamber.

Abstract: A fluid pressure regulator includes a regulation chamber arrangement in which a piston is received, in the regulation chamber arrangement, a first chamber and a second chamber being defined by opposite parts of the piston. The first chamber and the second chamber include respectively a first inlet and a second inlet for the fluid, the first inlet and the second inlet being connected to a first environment at a first pressure. The first chamber and the second chamber include respectively a first outlet and a second outlet for the fluid, the first outlet and the second outlet being connected to a second environment at a second pressure. The piston is movable in the regulation chamber arrangement in response to a variation of pressure of the fluid in the first chamber to open/close the second outlet to regulate the second pressure. The fluid pressure regulator includes a valve device to open/close the first outlet to induce the pressure variation in the first chamber.

Abstract: An improved feed and control system for an internal combustion engine able to be fed with one or other of two fuels such as petrol and liquid gas or petrol and methane, the engine comprising a plurality of first members for introducing a first fuel into corresponding explosion chambers and a plurality of second members for introducing the second fuel into the explosion chambers, the first introduction members being commanded and controlled by a control unit which, on the basis of preselected parameters, acts on the first members such as to achieve optimum engine operation. The control unit also commands and controls the plurality of the second introduction members which feed the second fuel to the respective explosion chambers, the unit hence being the only unit for controlling the engine operation, independently of whether it is operated with the first or with the second fuel.

Abstract: An improved feed and control system for an internal combustion engine able to be fed with one or other of two fuels such as petrol and liquid gas or petrol and methane, said engine comprising a plurality of first members (26) for introducing a first fuel into corresponding explosion chambers and a plurality of second members (6) for introducing the second fuel into said explosion chambers, said first introduction members (26) being commanded and controlled by a control unit (8) which, on the basis of preselected parameters, acts on said first members (26) such as to achieve optimum engine operation. Said control unit (8) also commands and controls the plurality of said second introduction members (6) which feed the second fuel to the respective explosion chambers, said unit (8) hence being the only unit for controlling the engine operation, independently of whether it is operated with the first or with the second fuel.