Magneti Marelli S.p.a.

Marelli Europe S.p.a.

Massimo Ambrosino

Luigi Lubrano

Marco La Sana

Emanuele Milani

Walter Nesci

Saverio Armeni

Riccardo Rosa

Simona De Cesaris

Pompilio Giorgi

Pierangelo Pagliano

Matteo Sbarile

Francesco Sciacca

Marco Lasana

A motor-driven throttle valve for an exhaust duct and having: a tubular duct, which is designed so that exhaust gases can flow through it; a throttle shutter, which is arranged inside the tubular duct and is mounted so as to rotate around a rotation axis; a first shaft, which is mounted so as to rotate around the rotation axis and supports the throttle shutter; an electric actuator, which is provided with a second shaft and is designed to rotate the shaft around the rotation axis; a support bearing, which supports the shaft in a through manner and is arranged on the outside of the tubular duct; and a spring, which applies to the shaft an elastic force, which axially pushes the shaft and, at the same time, is configured to transmit a rotary motion around the rotation axis from the second shaft of the electric actuator to the first shaft supporting the throttle shutter.

Motor-driven throttle valve for an exhaust duct

Described herein is an apparatus for active control of the sound of the engine of a land vehicle, which comprises a device for detecting a fundamental frequency of the sound of the engine, and comprises a generator of signals representing sound waves that have spectral characteristics that depend upon the aforesaid fundamental frequency. The apparatus comprises a modulator, which includes a module that applies a modulation to said waveforms so as to control a value of roughness or fluctuation strength of an audio signal for driving an actuator, which generates an engine noise.

Apparatus for the active control of the sound of the engine of a land vehicle and corresponding method

An exhaust system of an internal combustion engine and provided with: at least one first high acoustic attenuation path having a first inlet opening; at least one second low acoustic attenuation path having a second inlet opening; and at least one control valve, which is arranged at the second inlet opening of the second path to control the flow of the exhaust gases along the second path.

Exhaust system of an internal combustion engine

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Corbetta, Italy

Massimo Ambrosino