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AssigneeMagneti Marelli S.p.A.
InventorsMarcello Cristiani, Andrea Davitti, Carlo Orlandi
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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.
An internal combustion engine (1) with electromagnetically actuated valves comprising a variable volume combustion chamber (6), at least one suction duct (7) connecting the combustion chamber (6) with a suction manifold of the engine and at least one exhaust duct (8) connecting the combustion chamber (6) with an exhaust manifold of the engine, the internal combustion engine (1) further comprising, for each suction (7) and exhaust (8) duct, a respective valve (9) that can move to and from a closed position in which it closes this duct and an electromagnetic actuator (12) adapted on command to move the valve (9) to and from the closed position, the internal combustion engine (1) being characterised in that it comprises, for at least one of the valves (9), means (17) for balancing combustion pressures exerted on the valve (9) which are adapted to balance combustion pressure forces that tend to oppose the opening of this valve (9).
Dependencies are inferred from the claim text.