Patent Number: 7,823,558

Title: Tumble system for the intake manifold of an internal-combustion engine provided with an actuator made with shape-memory material

Abstract: A tumble system for the intake manifold of an internal-combustion engine is provided with a number of cylinders. The tumble system is provided with at least one throttle valve for varying the section of passage of air through an intake pipe, which connects a cylinder with the intake manifold. The throttle valve has a throttle butterfly mounted so as to rotate under the thrust of an actuator device equipped with at least one actuator element, which is made of a shape-memory material that generates a torque by modifying its own geometry following upon application of an external stress of a physical nature.

Inventors: Bellato; Nazario (Bologna, IT), Lancioni; Federico (Sangemini, IT), Pecora; Michele (Potenza, IT)

Assignee: Magneti Marelli Powertrain S.p.A.

International Classification: F02B 31/04 (20060101); F02B 31/06 (20060101)

Expiration Date: 2019-11-02 0:00:00