The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
Oct. 01, 1999
Magneti Marelli S.p.A., Milan, IT;
Abstract
An internal combustion engine with electromagnetically actuated valves comprising a variable volume combustion chamber, at least one suction duct connecting the combustion chamber with the suction manifold of the engine and at least one exhaust duct connecting the combustion chamber with the exhaust manifold of the engine, the internal combustion engine further comprising, for each suction and exhaust duct, a respective mushroom valve that can move from and to a closed position in which it closes the duct and an electromagnetic actuator adapted on command to move the valve to and from the closed position, the internal combustion engine further comprising, for at least one of the valves, a device for balancing the pressures exerted on the head of the valve and adapted to balance the pressure forces that tend to oppose the opening of this valve.