Turbocharger

Patent metadata

Field	Value
Publication number	US-12012889-B2
Application number	US-202018257598-A
Country	US
Kind code	B2
Filing date	Dec 18, 2020
Priority date	Dec 18, 2020
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

A turbine housing has a scroll part, an outlet pipe, and an inlet pipe. A bypass passage is formed on an inner peripheral side of a twisting form leading from the inlet pipe toward the scroll part so as to allow communication between an inlet passage and an outlet passage. Viewing the turbine housing in an axial direction, an opening center of an outlet opening of the bypass passage is located in a quadrant where a mounting flange is located among four quadrants defined by a first imaginary plane that passes through a rotational center and that is parallel to a surface of the mounting flange, and a second imaginary plane that passes through the rotational center and that is orthogonal to the first imaginary plane.

First claim

The invention claimed is:

1. A turbocharger comprising:
a turbine housing having a bypass passage and a waste gate valve;
a compressor housing; and
an actuator configured to open and close the waste gate valve,
the turbine housing including an annular scroll part forming a scroll surrounding a turbine wheel, an outlet pipe extending from a center of the scroll part along a rotational axis of the turbocharger, an inlet pipe extending along a direction that is tangent to the scroll part while transitioning from the scroll part in an axial direction of the rotational axis, and a mounting flange integrally casted at an end of the inlet pipe;
the bypass passage being formed on an inner peripheral side of a twisting form extending from the inlet pipe to the scroll part so as to allow communication between an inlet passage inside the inlet pipe and an outlet passage inside the outlet pipe, the waste gate valve being disposed inside the outlet pipe to open and close an outlet opening of the bypass passage; and
when viewing the turbine housing in an axial direction of the turbocharger, an opening center of the outlet opening is located in a quadrant where the mounting flange is located among first through fourth quadrants defined by a first imaginary plane that passes through a rotational center of the turbocharger and that is parallel to a surface of the mounting flange, and a second imaginary plane that passes through the rotational center and that is orthogonal to the first imaginary plane,
the waste gate valve having a cylindrical boss formed integrally with the outlet pipe, a substantially L-shaped shaft that is rotatably supported on an inner peripheral side of the boss via a bearing member and that has a swing lever at a tip of the shaft, and a disk-shaped valve body mounted on a tip of the swing lever;
the boss being located in the quadrant among the four quadrants where the mounting flange is located; and
wherein the mounting flange is mounted on a side surface of a cylinder head into which an exhaust port of an internal combustion engine opens, the actuator is located between the turbine housing and the cylinder head, a body portion of the actuator is located in the first quadrant adjacent to the fourth quadrant with the second imaginary plane therebetween, and a relay rod associated with the shaft traverses between the turbine housing and the cylinder head.

2. The turbocharger according to claim 1 , wherein
the boss is provided at a part connecting the inlet pipe and the outlet pipe and extending from the mounting flange to the scroll part.

3. The turbocharger according to claim 2 , wherein
the bypass passage is formed from a location directly behind the mounting flange of the inlet pipe extending toward the outlet passage.

4. The turbocharger according to claim 1 , wherein
the bypass passage is formed from a location directly behind the mounting flange of the inlet pipe extending toward the outlet passage.

Assignees

• Nissan Motor

Inventors

• Imai Daisuke
• Katou Naozumi
• Endo Tsubasa
• Morikawa Masashi

Classifications

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• F04D27/0215

  Arrangements therefor, e.g. bleed or by-pass valves · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F01D17/105

  by passing part of the fluid · CPC title