Patents by Inventor Roberto Schiavuzzi

Roberto Schiavuzzi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Internal combustion engine with exhaust emission control system
    Patent number: 4269029
    Abstract: A four cylinder spark ignition internal combustion engine has an exhaust emission control system including means for admitting fresh air into the exhaust system in order to promote a further combustion of partly burnt components in the gases coming from the combustion chambers, this means include a "reed" valve connected to the exhaust ports leading from the first and fourth cylinders (numbering from one end of the engine) through internal passages within the cylinder head; the system also comprises an exhaust gas recirculating system comprising a pneumatic valve which opens, when the conditions are appropriate, to draw off a proportion of the exhaust gases from the exhaust side of the engine and admit them to the induction side of the engine taking exhaust gases from branches of the exhaust manifold carrying exhaust gases from the second and third cylinders; in addition there is a system for admitting supplementary air to the induction manifold downstream of the carburettor during engine overrun conditions e
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: May 26, 1981
    Assignee: Fiat Auto S.p.A.
    Inventors: Francesco Cavallino, Pasquale Martinez, Michele Allione, Roberto Schiavuzzi
  • Internal combustion engine with exhaust emission control system
    Patent number: 4250860
    Abstract: A spark ignition internal combustion engine having an exhaust emission control system including an air pump driven by the engine to pump fresh air directly into the exhaust duct in order to promote a further combustion of partly burnt components in the gases coming from the combustion chambers, excess air pressure being released by a pressure relief valve into an air filter for the induction air; the system also comprises an exhaust gas recirculating system comprising a pneumatic valve which opens, when the conditions are appropriate, to draw off a proportion of the exhaust gases from the exhaust side of the engine and admit them to the induction side of the engine; in addition there is a system for admitting supplementary air to the induction manifold downstream of the carburettor during engine overrun conditions except when the engine is cold, and the carburettor is provided with supplementary pumps and valves which only function when the engine is cold, being inhibited as the engine approaches its normal w
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: February 17, 1981
    Assignee: Fiat Auto S.p.A.
    Inventors: Francesco Cavallino, Pasquale Martinez, Roberto Schiavuzzi, Michele Allione