Patent ID: 7043913

Claim:
A turbocharger integrally including an exhaust inflow passage guiding an exhaust gas to a turbine wheel, the exhaust inflow passage being provided in a turbine housing of the turbocharger and comprising: an introduction part formed approximately linearly from an inlet through which the exhaust gas is introduced; a scroll part annularly surrounding a circumference of the turbine wheel; and a tongue part provided in a rear end part of a roll of the scroll part annularly surrounding the circumference of the turbine wheel and forming a boundary against the introduction part formed approximately linearly from the inlet through which the exhaust gas is introduced, and the introduction part having: a partition part dividing the exhaust inflow passage into first exhaust inflow passage and second exhaust inflow passage within a range from the inlet to a predetermined position in a downstream of the inlet, a throttle part, whose sectional area becomes gradually small from the inlet to a position where the partition part ceases, a joining part where the exhaust gases passing through the first exhaust inflow passage and the second exhaust inflow passage are joined, and a diffuser part, whose sectional area becomes gradually large from the joining part to the tongue part.