Exhaust Turbo Supercharger

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a through hole is formed in said turbine housing,
• said turbine housing and said bearing housing are detachably fixed by a bolt inserted into said through hole, and a nut that engages with said bolt;
• and an insert made from a heat insulating material, or an air layer, is provided between an inner surface of said through hole and said bolt.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing,
• heat radiating fins or heat radiating grooves are formed in the vicinity of said screw hole,
• and said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein there is formed a screw hole in said turbine housing;
• said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole;
• and a through hole is provided in said bolt along the axis of said bolt.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing;
• said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole;
• and on an inner surface of said turbine housing in an area in contact with said exhaust gas, a heat shield layer is formed.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said bearing housing,
• and said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole.

An exhaust turbo supercharger having:

• a turbine housing, into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing;
• said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole;
• and between a head section of said bolt and said bearing housing there is provided an elastic member in a state of being compressed in the axial direction of said bolt.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing,
• said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole,
• and in said bearing housing, a bolt support section that receives said bolt is able to elastically deform in the axial direction of said bolt, and said bolt support section receives said bolt in a state of being elastically deformed to said turbine housing side.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing,
• in said turbine housing a cylindrical male engaging section that surrounds said turbine shaft is provided,
• in said bearing housing there is provided a female engaging section into which said male engaging section is inserted, an inner surface of which is fitted together with said male engaging section,
• and said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole, in a state where said male engaging section and said female engaging section are fitted together.

An exhaust turbo supercharger having:

• a turbine housing into which exhaust gas from an internal combustion engine is introduced;
• a turbine wheel which is provided within said turbine housing and which is rotation-driven by said exhaust gas;
• a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached;
• a bearing which supports said turbine shaft;
• a bearing housing which is connected to said turbine housing and inside of which said bearing is housed;
• and
• a gasket which seals, in an area outside in the radial direction of said turbine shaft, between said turbine housing and said bearing housing;
• wherein a screw hole is formed in said turbine housing,
• and between said turbine housing and said bearing housing, there are provided in the following order toward the radial direction outside of said turbine shaft:
• a narrow section in which a distance between said turbine housing and said bearing housing is short;
• and an expanded section in which a distance between said turbine housing and said bearing housing is greater than that in said narrow section;
• and said turbine housing and said bearing housing are detachably fixed by a bolt that engages with said screw hole.