C.r.f. Societa Consortile Per Azioni

Costantinos Vafidis

Francesco Vattaneo

Roberto Saretto

Damiano Micelli

In an internal combustion engine with variable actuation valves, each variable actuation valve is actuated by an actuator assembly including an actuating piston slidably mounted in a guide bushing. Between the actuating piston and the stem of the respective valve is interposed an auxiliary hydraulic tappet positioned outside the guide bushing of the actuating piston, so that said bushing can be dimensioned with a relatively small diameter, regardless of the outer diameter of the auxiliary hydraulic tappet. The intake valves of a same cylinder are actuated by a single cam, by means of a single pumping piston and by means of a single pressure chamber controlled by a single solenoid valve.

Internal combustion engine with valves with variable actuation which are driven by a single pumping piston and controlled by a single solenoid valve for each engine cylinder

A multiple cylinder engine is described, provided with an electronically controlled hydraulic system for actuating the intake valves, in which intake valves and exhaust valves are controlled by a single camshaft.

Internal combustion engine with a single camshaft which controls exhaust valves mechanically and intake valves through an electronically controlled hydraulic device

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Orbassano, Italy

Costantinos Vafidis