TURBOCHARGER

摘要

A turbocharger includes a turbine housing adapted to be arranged in the middle of an engine exhaust passage, a bearing housing coupled to the turbine housing, a turbine wheel located inside the turbine housing, a rotary shaft that is connected to the turbine wheel and is rotationally supported by the bearing housing, and a cooling water passage that is provided inside the turbine housing. The cooling water passage is located around the turbine wheel. The turbine housing includes a first connection portion joined to the bearing housing, a second connection portion joined to a part of the engine exhaust passage located on a downstream side of the turbine housing, and a heat insulating portion located between the cooling water passage and at least one of the first connection portion and the second connection portion.

主权项

1. A turbocharger comprising:
a turbine housing adapted to be arranged in the middle of an engine exhaust passage; a bearing housing coupled to the turbine housing; a turbine wheel arranged inside the turbine housing; a rotary shaft that is connected to the turbine wheel to be rotational integrally with the turbine wheel and that is rotationally supported by the bearing housing; and a cooling water passage that is provided inside the turbine housing and that is used to circulate cooling water, wherein the cooling water passage is located around the turbine wheel, and the turbine housing includes
a first connection portion joined to the bearing housing,a second connection portion joined to a part of the engine exhaust passage located on a downstream side of the turbine housing, anda heat insulating portion located between the cooling water passage and at least one of the first connection portion and the second connection portion.