US 12,170,078 B2
Sound bypass
Giuseppe Iossa, Barcelona (ES); Alessio Figuretti, Barcelona (ES); Davide Palmieri, Tarragona (ES); and Stefano Izzo, Barcelona (ES)
Assigned to McLaren Automotive Limited, Woking (GB)
Filed by McLaren Automotive Limited, Woking (GB)
Filed on Aug. 3, 2022, as Appl. No. 17/880,437.
Claims priority of application No. 2111213 (GB), filed on Aug. 3, 2021.
Prior Publication US 2023/0039045 A1, Feb. 9, 2023
Int. Cl. G10K 11/22 (2006.01); F01N 13/10 (2010.01); F02M 35/12 (2006.01); G10K 11/08 (2006.01); G10K 11/26 (2006.01); G10K 13/00 (2006.01)
CPC G10K 13/00 (2013.01) [F01N 13/10 (2013.01); G10K 11/22 (2013.01); G10K 11/26 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A sound bypass device configured to transmit engine-generated sound pulses from an engine to a sound outlet whilst preventing flow of gases to the sound outlet, the sound bypass device comprising:
an input tube configured to conduct the engine-generated sound pulses from the engine;
a sound transmission device connected to the input tube at a first end and to the sound outlet at a second end, the sound transmission device comprising: a first volume connected to the first end, a second volume connected to the second end, and a flexible diaphragm separating the first volume from the second volume and configured to transfer variations in pressure in the first volume to the second volume; and
an output tube configured to conduct sound pulses to the sound outlet, wherein the output tube has a cross-sectional area that is greater at the sound outlet than at the second end and the rate of increase of the cross-sectional area of the output tube is constant along the length of the output tube;
wherein the first volume has a cross-sectional area that is greater at the diaphragm than at the first end and the second volume has a cross-sectional area that is greater at the diaphragm than at the second end;
wherein the flexible diaphragm comprises:
a rigid barrier separating the first volume from the second volume;
a first flexible membrane located within the first volume;
a second flexible membrane located within the second volume; and
a connecting member extending though the rigid barrier and connecting the first flexible membrane to the second flexible membrane, the connecting member being configured to transfer sound vibrations from the first flexible membrane to the second flexible membrane; and
one or more balance orifices which are located in one or more walls of the second volume.