C.r.f. S.c.p.a.

Centro Ricerche Fiat S.p.a.

Centro Richerche Fiat Societa' Sortile Per Azioni

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Mario Palazzetti

Luigi Di Leo

Pier L Tenci

Calibration method for a fuel injection system

A method of generating a phase signal over 720.degree. for an internal-combustion engine comprises a multi-point electronic injection system operating sequentially, permitting firing in only some of the cylinders during the starting stage and detecting the angular position in which the first firing occurs.

Method of synchronizing an internal-combustion engine without a cam

Starting from a sequence of values of indicated torque detected for each expected combustion in the engine a cycle signal is generated as a combination of at least two successive values of the said sequence. The peak value of the said cycle signal is then compared with a comparison threshold chosen preferably in proportion of the fuel injection duration into the cylinders. Misfires are identified preferably from the result of a comparison between the said peak value and the said comparison threshold which differs from the result of comparison in the presence of regular operation of the engine.

Process and system for detecting misfiring in internal combustion engines

A solar energy converter is provided in the form of a unit for assembly together with other similar units to build up a solar-energy conversion installation. Each unit includes a fixed support structure, a mounting element articulated on the support structure, and an optical concentrator carried by the mounting element. The optical concentrator consists of a plurality of coplanar, spherical lenses the centers of which are located at the vertices of a polygon. The center of the polygon lies on a line extending perpendicularly to the plane of the lenses through the point of articulation of the mounting element on the support structure. Each unit further includes a plurality of converter modules located at the foci of respective ones of the spherical lenses and carried by respective connecting legs which extend from the mounting element. Each converter module includes a photo-voltaic cell and means for transferring the heat dissipated in the photo-voltaic cell to a liquid.

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Avigliana, Italy

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