Abstract: In an embodiment, a silencer of a vehicle's exhaust system for a fuel cell system is capable of reducing high-frequency noise and reducing noise generated from a drain, wherein the silencer includes a housing having an inlet and an outlet, a perforated tube located in the housing, the perforated tube having a plurality of through-holes, at least one baffle interposed between the housing and the perforated tube to partition a space between the housing and the perforated tube into a plurality of resonance chambers, and a cover installed in the housing to support the perforated tube and to partition the most downstream resonance chamber.

Abstract: A variable exhaust valve assembly for a vehicle includes an exhaust housing, a power transmission device that transmits rotational power, a shaft that extends through the exhaust housing and is coupled with a valve so as to open and close the exhaust housing, and a heat shielding unit to reduce heat transfer between the power transmission device and the exhaust housing. The power transmission device is configured to regulate an opening degree of the valve. The variable exhaust valve assembly is improved in durability by minimizing damage to power transmission caused by high-temperature heat of exhaust gas, and reducing vibration transmitted to the power transmission device.

Abstract: A structure pof muffler may include a housing which has a space therein, and has a first side connected to an inlet pipe into which exhaust gas flows, a first baffle which divides an interior of the housing into a front chamber and an intermediate chamber connected to the inlet pipe, a second baffle which divides the interior of the housing into a rear chamber and the intermediate chamber connected to the inlet pipe, and a discharge pipe which is mounted to penetrate the first baffle and the second baffle, and mounted such that a first end of the discharge pipe is positioned in the rear chamber, and a second end of the discharge pipe extends through the front chamber and penetrates the housing.

Abstract: A single multi-functional position holder is positioned in a receiving space of a housing to implement multiple functions of: satisfying a limitation on the height of a connector by making contact with an insertion portion and a concentric mounting portion of a connector assembly assembled through a curling process; increasing durability to absorb an internal load attributable to the curling process, by making tight contact with the housing; and preventing shaking of a PCB assembly due to a disturbance by restricting the PCB assembly to hold a PCB, thereby reducing the number of component parts of the connector, the process steps, and the cost. In particular, the multi-functional position holder is fixed in the housing without welding so that it is possible to remove a welding process from an assembling process of the connector.

Abstract: A structure pof muffler ma include a housing which has a space therein, and has a first side connected to an inlet pipe into which exhaust gas flows, a first baffle which divides an interior of the housing into a front chamber and an intermediate chamber connected to the inlet pipe,a second baffle which divides the interior of the housing into a rear chamber and the intermediate chamber connected to the inlet pipe, and a discharge pipe which is mounted to penetrate the first baffle and the second baffle, and mounted such that a first end of the discharge pipe is positioned in the rear chamber, and a second end of the discharge pipe extends through the front chamber and penetrates the housing,

Abstract: A single multi-functional position holder is positioned in a receiving space of a housing to implement multiple functions of: satisfying a limitation on the height of a connector by making contact with an insertion portion and a concentric mounting portion of a connector assembly assembled through a curling process; increasing durability to absorb an internal load attributable to the curling process, by making tight contact with the housing; and preventing shaking of a PCB assembly due to a disturbance by restricting the PCB assembly to hold a PCB, thereby reducing the number of component parts of the connector, the process steps, and the cost. In particular, the multi-functional position holder is fixed in the housing without welding so that it is possible to remove a welding process from an assembling process of the connector.

Abstract: An exhaust heat recovery apparatus may include a bypass valve that is rotatably provided on a bypass path through which a high-temperature exhaust gas passes to open or close the bypass path, a heat exchanger that is communicatively connected to the bypass path to allow heat exchange to be performed between the high-temperature exhaust gas supplied from the bypass path and a low-temperature coolant introduced through a coolant inlet when the bypass path is closed, a valve actuator including a rod moved up and down by expansion or contraction of a wax sealed therein, and a connection part that converts an up and down motion of the rod into a rotary motion to allow the bypass valve to open or close the bypass path along with movement of the rod.

Abstract: An exhaust heat recovery apparatus may include a bypass valve that is rotatably provided on a bypass path through which a high-temperature exhaust gas passes to open or close the bypass path, a heat exchanger that is communicatively connected to the bypass path to allow heat exchange to be performed between the high-temperature exhaust gas supplied from the bypass path and a low-temperature coolant introduced through a coolant inlet when the bypass path is closed, a valve actuator including a rod moved up and down by expansion or contraction of a wax sealed therein, and a connection part that converts an up and down motion of the rod into a rotary motion to allow the bypass valve to open or close the bypass path along with movement of the rod.

Abstract: An exhaust-downpipe of a vehicle may include a base portion connected to a top of a catalyst converter having a vertical cylinder, an inlet circularly opened in a horizontal direction, an introduction round portion extending straight along the horizontal direction from the inlet and then and curvedly bent downward toward the base portion, and branch line portions connected to both outsides above the base portion with both ways branching and drawing a circular arc from the introduction round portion.