Forced-induction device for vehicle

Patent metadata

Field	Value
Publication number	US-10570810-B2
Application number	US-201715716316-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Oct 6, 2016
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A vehicle forced-induction device includes a first exhaust turbine type forced-induction unit and a second exhaust turbine type forced-induction unit. The first forced-induction unit includes an outlet pipe. The outlet pipe includes a first tubular portion and an annular first flange. The second forced-induction unit includes an inlet pipe. The inlet pipe includes a second tubular portion and an annular second flange. The forced-induction device includes a fastener that includes an annular groove. The annular groove has a shape in which a width of the annular groove decreases toward a groove bottom. The fastener is wound around the first and second flanges along a circumference of the first and the second flanges, thereby housing the first and second flanges in the annular groove. The fastener fastens the first and second flanges to urge the first and second flanges toward each other.

First claim

The invention claimed is:

1. A vehicle forced-induction device comprising:
a first exhaust turbine type forced-induction unit including
an outlet pipe that discharges exhaust gas from inside the first exhaust turbine type forced-induction unit,
the outlet pipe including:
a first tubular portion, through which exhaust gas passes, and
an annular first flange provided at a distal end of the first tubular portion;

a second exhaust turbine type forced-induction unit including
an inlet pipe that introduces exhaust gas into the second exhaust turbine type forced-induction unit,
the inlet pipe including:
a second tubular portion, through which exhaust gas passes, and
an annular second flange provided at a distal end of the second tubular portion;

the annular first flange of the outlet pipe and the annular second flange of the inlet pipe being connected to each other;
the first tubular portion of the outlet pipe and the second tubular portion of the inlet pipe communicating with each other; and
a fastener that fastens the annular first flange of the outlet pipe and the annular second flange of the inlet pipe to each other, wherein:
the fastener includes an annular groove having a shape in which a width of the annular groove decreases toward a groove bottom;
the fastener is wound around a circumference of the annular first flange of the outlet pipe and the annular second flange of the inlet pipe to house the annular first and second flanges in the annular groove;
the fastener fastens and urges the annular first and second flanges toward each other;
either one of the outlet pipe and the inlet pipe has a recess in a distal end face; and
the other one of the outlet pipe and the inlet pipe has a protrusion to be fitted into the recess.

2. The vehicle forced-induction device according to claim 1 , wherein:
the recess is configured to be annular to surround an exhaust gas transferring passage of the either one of the outlet pipe and the inlet pipe in which the recess is provided; and
the protrusion is configured to be annular to surround the exhaust gas transferring passage of the other one of the outlet pipe and the inlet pipe in which the protrusion is provided.

3. The vehicle forced-induction device according to claim 1 , wherein
when the vehicle forced-induction device is mounted on a vehicle, the second exhaust turbine type forced-induction unit is arranged on top of the first exhaust turbine type forced-induction unit in a vertical direction with a distal end face of the outlet pipe and a distal end face of the inlet pipe being opposed to each other in a horizontal direction.

4. The vehicle forced-induction device according to claim 1 , wherein:
the outlet pipe has the protrusion;
the inlet pipe has the recess; and
when the vehicle forced-induction device is mounted on a vehicle, the first exhaust turbine type forced-induction unit is arranged below the second exhaust turbine type forced-induction unit in a vertical direction with a distal end face of the outlet pipe and a distal end face of the inlet pipe being opposed to each other in a horizontal direction.

5. The vehicle forced-induction device according to claim 4 , wherein:
the first tubular portion has the protrusion;
the second tubular portion has the recess; and
an inner circumferential surface of the protrusion is continuous with an inner circumferential surface of the first tubular portion.

6. The vehicle forced-induction device according to claim 4 , wherein a mass of the second exhaust turbine type forced-induction unit is greater than that of the first exhaust turbine type forced-induction unit.

7. A vehicle forced-induction device comprising:
a first exhaust turbine type forced-induction unit including
an outlet pipe that discharges exhaust gas from inside the first exhaust turbine type forced-induction unit,
the outlet pipe including:
a first tubular portion, through which exhaust gas passes, and
an annular first flange provided at a distal end of the first tubular portion;

a second exhaust turbine type forced-induction unit including
an inlet pipe that introduces exhaust gas into the second exhaust turbine type forced-induction unit,
the inlet pipe including:
a second tubular portion, through which exhaust gas passes, and
an annular second flange provided at a distal end of the second tubular portion;

the annular first flange of the outlet pipe and the annular second flange of the inlet pipe being connected to each other;
the first tubular portion of the outlet pipe and the second tubular portion of the inlet pipe communicating with each other; and
a fastener that fastens the annular first flange of the outlet pipe and the annular second flange of the inlet pipe to each other, wherein:
the fastener includes an annular groove having a shape in which a width of the annular groove decreases toward a groove bottom;
the fastener is wound around a circumference of the annular first flange of the outlet pipe and the annular second flange of the inlet pipe to house the annular first and second flanges in the annular groove;
the fastener fastens and urges the annular first and second flanges toward each other;
either one of the annular first flange and the annular second flange has a housing groove;
the housing groove is configured to be annular so as to surround an exhaust gas transferring passage of the either one of the annular first flange and the annular second flange in which the housing groove is provided;
an annular sealing member is arranged in the housing groove and is in close contact with the other one of the annular first flange and the annular second flange that does not have the housing groove;
a direction in which the annular first flange and the annular second flange are arranged is defined as an axial direction;
a direction in which the annular first flange and the annular second flange are housed in the housing groove is defined as a radial direction; and
a dimension in the axial direction of the either one of the annular first and second flanges that has the housing groove is larger than a dimension in the axial direction of the other one of the annular first and second flanges that does not have the housing groove.

8. The vehicle forced-induction device according to claim 7 , wherein:
either one of the outlet pipe and the inlet pipe has a recess in a distal end face; and
the other one of the outlet pipe and the inlet pipe has a protrusion to be fitted into the recess.

9. The vehicle forced-induction device according to claim 8 , wherein:
the recess is configured to be annular to surround an exhaust gas transferring passage of the either one of the outlet pipe and the inlet pipe in which the recess is provided; and
the protrusion is configured to be annular to surround the exhaust gas transferring passage of the other one of the outlet pipe and the inlet pipe in which the protrusion is provided.

10. The vehicle forced-induction device according to claim 7 , wherein
when the vehicle forced-induction device is mounted on a vehicle, the second exhaust turbine type forced-induction unit is arranged on top of the first exhaust turbine type forced-induction unit in a vertical direction with a distal end face of the outlet pipe and a distal end face of the inlet pipe being opposed to each other in a horizontal direction.

11. The vehicle forced-induction device according to claim 7 , wherein:
the outlet pipe has a protrusion;
the inlet pipe has a recess; and
when the vehicle forced-induction device is mounted on a vehicle, the first exhaust turbine type forced-induction unit is arranged below the second exhaust turbine type forced-induction u

Assignees

• Toyota Motor Co Ltd
• Aisin Takaoka Ltd

Inventors

• Tsukiyama Takashi
• Ura Haruto
• Uesugi Tsuyoshi
• Terui Daisuke
• Hosono Akihiro
• KAWAZOE Ryuta

Classifications

• F02B37/004 Primary

  with exhaust drives arranged in series · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F16L23/08

  connection by tangentially arranged pin and nut · CPC title

• F05D2260/39

  by a V-shaped ring to join the flanges of two cylindrical sections, e.g. casing sections of a turbocharger · CPC title

• F01D25/243

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title