Road vehicle with an internal combustion engine and provided with an exhaust noise transmission device

Patent metadata

Field	Value
Publication number	US-11028743-B2
Application number	US-201815958303-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 21, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

Road vehicle having: a passenger compartment; an internal combustion engine provided with at least one exhaust duct, which originates from an exhaust manifold and has at least one exhaust gas treatment device; and an exhaust noise transmission device provided with a transmission duct, which originates from the exhaust duct, and with a symposer device, which is arranged inside the transmission duct, is pneumatically insulating and is acoustically permeable; an inlet of the transmission duct being arranged between the exhaust manifold and the exhaust gas treatment device, hence upstream of the exhaust gas treatment device.

First claim

The invention claimed is:

1. A road vehicle ( 1 ) comprising:
a passenger compartment ( 5 );
an internal combustion engine ( 4 ) provided with at least one exhaust duct ( 13 ), which originates from an exhaust manifold ( 8 ) and has at least one exhaust gas treatment device ( 17 ); and
an exhaust noise transmission device ( 21 ), which is provided with at least one transmission duct ( 22 ), which originates from the exhaust duct ( 13 ), and with a symposer device ( 23 ), which is arranged inside the transmission duct ( 22 ), is pneumatically insulating and is acoustically permeable;
wherein an inlet ( 24 ) of the transmission duct ( 22 ) is arranged between the exhaust manifold ( 8 ) and the exhaust gas treatment device ( 18 ), hence upstream of the exhaust gas treatment device ( 18 );
the road vehicle ( 1 ) being characterized in that the transmission device comprises: a temperature sensor ( 28 ) or a flow sensor ( 29 ) arranged inside the transmission duct ( 22 ); and
a control unit ( 30 ) which, through the temperature sensor ( 28 ) or the flow sensor ( 29 ) diagnoses the presence of exhaust gas leaks in the transmission duct ( 22 ).

2. A road vehicle ( 1 ) according to claim 1 , wherein:
the internal combustion engine ( 4 ) comprises a turbine ( 15 ), which is arranged along the exhaust duct ( 13 ) downstream of the exhaust manifold ( 8 ); and
the inlet ( 24 ) of the transmission duct ( 22 ) is arranged between the turbine ( 15 ) and the exhaust gas treatment device ( 17 ), hence downstream of the turbine ( 15 ).

3. A road vehicle ( 1 ) according to claim 1 , wherein:
the internal combustion engine ( 4 ) comprises a turbine ( 15 ), which is arranged along the exhaust duct ( 13 ) downstream of the exhaust manifold ( 8 ); and
the inlet ( 24 ) of the transmission duct ( 22 ) is arranged between the exhaust manifold ( 8 ) and the turbine ( 15 ), hence upstream of the turbine ( 15 ).

4. A road vehicle ( 1 ) according to claim 1 , wherein an outlet ( 25 ) of the transmission duct ( 22 ) is arranged outside the exhaust duct ( 13 ) and is oriented towards the passenger compartment ( 5 ) or outwards.

5. A road vehicle ( 1 ) according to claim 1 , wherein an outlet ( 25 ) of the transmission duct ( 22 ) is arranged inside the exhaust duct ( 13 ) and downstream of the exhaust gas treatment device ( 17 ).

6. A road vehicle ( 1 ) according to claim 5 , wherein:
the internal combustion engine ( 4 ) comprises a silencer ( 18 ), which is arranged at the end of the exhaust duct ( 13 ) and is provided with an outlet pipe ( 19 ) forming the end part of the exhaust duct ( 13 ); and
the outlet ( 25 ) of the transmission duct ( 22 ) is arranged downstream of the silencer ( 18 ).

7. A road vehicle ( 1 ) according to claim 6 , wherein the outlet ( 25 ) of the transmission duct ( 22 ) is arranged in the outlet pipe ( 19 ) of the silencer ( 18 ).

8. A road vehicle ( 1 ) according to claim 5 , wherein:
the internal combustion engine ( 4 ) comprises a silencer ( 18 ), which is arranged at the end of the exhaust duct ( 13 ) and is provided with an outlet pipe ( 19 ) forming the end part of the exhaust duct ( 13 ); and
the outlet ( 25 ) of the transmission duct ( 22 ) is arranged between the exhaust gas treatment device ( 17 ) and the silencer ( 18 ).

9. A road vehicle ( 1 ) according to claim 1 , wherein the symposer device ( 23 ) is entirely made of a metal material.

10. A road vehicle ( 1 ) according to claim 1 , wherein:
the symposer device ( 23 ) is at least partially made of a plastic material; and
the transmission duct ( 22 ) comprises an initial metal part ( 26 ), which originates from the exhaust duct ( 13 ), and an insulating plastic part ( 27 ), which is arranged in series with the initial part ( 26 ) immediately upstream of the symposer device ( 23 ).

11. A road vehicle ( 1 ) according to claim 1 , wherein the control unit ( 30 ) detects exhaust gas leaks in the transmission duct ( 22 ) if the temperature inside the transmission duct ( 22 ) increases without a corresponding temperature increase inside the exhaust duct ( 13 ) or if the flow rate inside the transmission duct ( 22 ) is greater than zero.

Assignees

• Ferrari Spa

Inventors

• Naclerio Francesco

Classifications

• F01N1/023

  Helmholtz resonators · CPC title

• F01N2490/155

  being disposed one after the other in flow direction · CPC title

• F02M35/1294

  Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation · CPC title

• F01N13/008

  Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title

• F01N2900/1404

  Exhaust gas temperature · CPC title