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1. (WO2018083650) MUFFLER FOR MOTOR VEHICLES

Pub. No.:    WO/2018/083650    International Application No.:    PCT/IB2017/056881
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Sat Nov 04 00:59:59 CET 2017
IPC: F01N 1/08
F01N 1/10
F01N 1/16
Applicants: PIAGGIO & C. S.P.A.
Inventors: SOATTI, Piero
BELLATO, Francesco
Title: MUFFLER FOR MOTOR VEHICLES
Abstract:
A muffler (4) for motor vehicles comprising an intake pipe (8) of the exhaust gases that separates, at a fork (10), into a main pipe (12) and a secondary pipe (16), a muffler body (24) which delimits an expansion volume (28) and houses at least partly the main pipe (12) and the secondary pipe (16), wherein the intake pipe (8) of the exhaust gas is in fluid continuous connection with the main pipe (12) through the secondary pipe (16), and wherein the main pipe (12) comprises, downstream of the fork (10), a throttle valve (32) which allows or prevents a further fluidic connection of the intake pipe (8) of exhaust gas with the main pipe (12), and an output of the exhaust gases (40), for the expulsion of the gases from the muffler pipe (4).