Patent ID: 11859524
Assignee: HYUNDAI MOTOR COMPANY
Field: Environmental technology (Chemistry)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A method for interlocking an engine exhaust sound with a vehicle traveling mode, the method comprising:
confirming the vehicle traveling mode in a SMART DRIVE MODE generated by a mode selection device of a traveling mode system; and
performing a SMART SHIFT control in which the engine exhaust sound is switched, the engine exhaust sound being generated by a muffler discharging an exhaust gas to an atmosphere according to a valve opening of an electronic variable valve, which is changed according to an accelerator pedal stroke, in the SMART DRIVE MODE,
wherein the muffler includes:
a housing forming an internal space therein;
a pair of a first baffle and a second baffle for partitioning the internal space of the housing into a first chamber, a second chamber, and a third chamber:
an inlet tube for introducing the exhaust gas to send a portion of the introduced exhaust gas to the first chamber through a punching hole;
a 1IN-2OUT Y-shaped tube for sending a portion of branched exhaust gas of remaining introduced exhaust gas coming from the inlet tube to a first tail pipe to form a first exhaust sound tone change section and sending remaining branched exhaust gas to the third chamber to form a third exhaust sound tone change section; and
a second external connection tube for introducing an internal exhaust gas coming from the first chamber to send the internal exhaust gas to a second tail pipe to discharge the internal exhaust gas and sending a portion of the internal exhaust gas through the punching hole to the third chamber to form a second exhaust sound tone change section.