Abstract: A mold and method for gravity casting may integrally cast a turbine housing having a twin scroll unit and a bypass unit and an exhaust manifold having a plurality of exhaust runner units. A turbine housing-side riser may be formed based on the end portion of the twin scroll unit within a first mold and a second mold in the state where the cavity of the turbine housing is formed so that the end portion of the twin scroll unit which is the outlet of the turbine housing is upward disposed.

Abstract: A mold and method for gravity casting may integrally cast a turbine housing having a twin scroll unit and a bypass unit and an exhaust manifold having a plurality of exhaust runner units. A turbine housing-side riser may be formed based on the end portion of the twin scroll unit within a first mold and a second mold in the state where the cavity of the turbine housing is formed so that the end portion of the twin scroll unit which is the outlet of the turbine housing is upward disposed.

Abstract: An air duct disposed at a front end module that includes a radiator grille of a vehicle, a bumper cover having an opening, and an intercooler according to various embodiments of the present invention may include a first duct that guides air into the intercooler through the radiator grille, a second duct that guides air into the intercooler through an opening of the bumper cover and is integrally formed with the first duct, and a separation wall formed between the first duct and the second duct.

Abstract: A mold and method for gravity casting may integrally cast a turbine housing having a twin scroll unit and a bypass unit and an exhaust manifold having a plurality of exhaust runner units. A turbine housing-side riser may be formed based on the end portion of the twin scroll unit within a first mold and a second mold in the state where the cavity of the turbine housing is formed so that the end portion of the twin scroll unit which is the outlet of the turbine housing is upward disposed.

Abstract: An intake system of an engine may include an intake line that is configured to supply cylinder of an engine with air, an exhaust line that exhaust gas combusted in the cylinder is exhausted, a housing disposed on the intake line and a compressor is disposed therein, the compressor is operated by a turbine disposed on an exhaust line, a recirculation line that recirculates the air from the intake line of a downstream side of the compressor to the intake line of an upstream side of the compressor, and an anti surge valve disposed on the recirculation line to open/close the recirculation line, wherein a length of a first section (l) that is straight from the anti surge valve is longer than two times the outlet diameter (d) of the anti surge valve in the recirculation line that is formed from the anti surge valve to an upstream side of the compressor.

Abstract: Disclosed is an exhaust system for discharging combusted gases from the cylinder of a vehicle engine, which comprises an exhaust manifold with a plurality of exhaust gas runners, wherein the exhaust gas runners are spaced so as to avoid an exhaust gas interference.

Abstract: Disclosed is an exhaust system for discharging combusted gases from the cylinder of a vehicle engine, which comprises an exhaust manifold with a plurality of exhaust gas runners, wherein the exhaust gas runners are spaced so as to avoid an exhaust gas interference.