A method for automatically changing the engine exhaust sound in conjunction with the traveling mode implemented by the exhaust system applied to the vehicle may vary the valve opening of an electronic variable valve provided in a first tail pipe of first and second tail pipes of muffler discharging the exhaust gas coming from an engine by a mode recognition logic connected to an engine ECU to the atmosphere, and control the variation of the valve opening with the engine torque and the engine RPM based on a change in an accelerator pedal stroke in any one of a SMART DRIVE MODE-ECO state, a SMART DRIVE MODE-COMFORT state, and a SMART DRIVE MODE-SPORT state, implementing a quiet engine exhaust sound and a sporty engine exhaust sound depending on various vehicle traveling states provided by the SMART DRIVE MODE and increasing vehicle/engine outputs.

The preferred invention is directed to a controller for a vehicle exhaust valve. The controller comprises a vehicle interface for determining a live value for an operating parameter of a vehicle, a recording module being configured to, upon activation, instantaneously record the live value of the operating parameter, and a programming module for determining a value range based on the recorded live value and allowing a desired position of the valve to be set such that during operation, the control system automatically moves the valve to the desired position when the operating parameter is within the value range.

A selective acoustic soundproofing device for a vehicle includes a housing that is configured to couple to an exhaust system of the vehicle so that an internal space defined by the housing is in fluidic communication with the exhaust system. A wall that is coupled to the housing extends from proximate to the first end to proximate to the second end of the housing to define a first passage and a second passage through the housing. A selector that is coupled to the housing is configured to selectively direct sound pressure from the engine through the first and second passages. A baffle positioned in the first passage is configured for acoustic quieting of loudness of the sound pressure when the selector is positioned to direct the sound pressure from the engine through the first passage relative to when the selector is positioned to direct the sound pressure through the second passage.

Methods and systems are provided for diagnostics of an exhaust tuning valve during vehicle-off conditions. In one example, the engine may be reverse rotated, unfueled while the position of the exhaust is varied and an intake air flow is estimated at each position of the exhaust tuning valve. The exhaust tuning valve may be diagnosed based on a change in air flow with the variation in the position of the exhaust tuning valve.

An exhaust-gas system for a vehicle having an internal combustion engine includes a Helmholtz resonator and two exhaust-gas lines extending toward the resonator. The resonator has two neck openings to a resonator volume. Each neck opening is coupled to one of the exhaust-gas lines, and the resonator is tuned to damp a dominant engine order.

Methods and systems are provided for diagnostics of an exhaust tuning valve during vehicle-off conditions. In one example, the engine may be reverse rotated, unfueled while the position of the exhaust is varied and an intake air flow is estimated at each position of the exhaust tuning valve. The exhaust tuning valve may be diagnosed based on a change in air flow with the variation in the position of the exhaust tuning valve.

An exhaust system for an internal combustion automotive engine, such as a V engine or boxer engine, includes a left exhaust tract connectable to a left group of cylinders and a right exhaust tract connectable to a right group of cylinders. Each exhaust tract includes a tract structure defining a tract inlet for receiving exhaust gas ejected from the group of cylinders to which the exhaust tract is connectable, at least one exhaust outlet opening into the atmosphere, and a connection pipe extending between the tract inlet and the exhaust outlet. The connection pipe includes an inlet aperture for receiving exhaust gas from the tract inlet and an outlet aperture for transferring exhaust gas towards the exhaust opening. The left and the right connection pipes are joined to realize a pipe junction such that the connection pipes form a common connection aperture for transferring exhaust gas and the exhaust system includes at least one valve member for opening or closing the common connection aperture.

An exhaust flap for an exhaust system of a motor vehicle, which has an internal combustion engine and an electronic processing device for a closed-loop control of the internal combustion engine, has a valve element, an actuator for moving the valve element, and a dedicated electronic processing device. The dedicated electronic processing device is configured to receive a first signal which is provided by the electronic processing device of the motor vehicle and which characterizes a first position of the valve element, generate a second signal which characterizes a second position of the valve element as a function of the received first signal, and transmit the second signal to the actuator. The actuator moves the valve element into the second position based on the received second signal.

An exhaust management system for use in a motor vehicle having a muffler and a combustion engine generating an exhaust also has a bypass channel configured to be mounted to bypass the muffler of the exhaust system. The system also has a valve controlling air flow through the bypass channel, and a controller operably coupled with the valve. The controller is configured to be switchable between at least two modes. The at least two modes include a provider dynamic mode configured to be modified by a provider only, and a user dynamic mode configured to be modified by a user. The user has no rights to modify the provider dynamic mode.

A muffler assembly (10) that includes a first exhaust gas outlet portion (51), and a second exhaust gas outlet portion (52), with a valve (12) being operable to determine the volume of gas leaving through each outlet portions (51, 52) to govern the resistance of exhaust gas flowing through the muffler assembly (10).