Turbocharger

Patent metadata

Field	Value
Publication number	US-9874140-B2
Application number	US-201514793075-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Jul 7, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A turbocharger includes a compressor housing including a scroll chamber, and a seal plate assembled to the compressor housing. The compressor housing and the seal plate define an intake passage. The seal plate includes a plate-side connecting portion in contact with the compressor housing. The radius of curvature of a wall surface of the scroll chamber of the compressor housing, in a section including a compressor rotational axis, is increased in a direction toward an outlet located on the downstream side of the scroll chamber in an intake air flow direction. The plate-side connecting portion protrudes in a direction along the compressor rotational axis. The radius of curvature of an inner surface of the seal plate continuous with the scroll chamber of the intake passage, in the section including the compressor rotational axis, is increased in the direction toward the outlet of the scroll chamber.

First claim

What is claimed is:

1. A turbocharger comprising:
a compressor housing including a scroll chamber; and
a seal plate assembled to the compressor housing,
the compressor housing and the seal plate defining an intake passage, the intake passage including a diffuser passage that directly communicates with the scroll chamber,
the seal plate including an engagement groove with which a terminal end of an outer wall portion of the compressor housing is engaged, the engagement groove being radially inward from an outer edge portion of the seal plate and recessed relative to the diffuser passage and relative to the outer edge portion,
the seal plate including a plate-side connecting portion in contact with the compressor housing,
a radius of curvature of a wall surface of the scroll chamber of the compressor housing, in a section including a compressor rotational axis, being increased in a direction toward an outlet located on a downstream side of the scroll chamber in an intake air flow direction,
the plate-side connecting portion protruding in a direction along the compressor rotational axis, and
a radius of curvature of an inner surface of the seal plate continuous with the scroll chamber of the intake passage, in the section including the compressor rotational axis, being increased in the direction toward the outlet of the scroll chamber.

2. The turbo charger according to claim 1 , wherein the plate-side connection portion extends from an inner end of the engagement groove.

3. The turbo charger according to claim 1 , wherein the terminal end of the outer wall portion of the compressor housing has a chamfer that is not symmetric with respect to the compressor rotational axis.

4. The turbo charger according to claim 1 , wherein the scroll chamber is defined in part by the terminal end of the outer wall portion of the compressor housing.

5. The turbo charger according to claim 1 , wherein an outer radial surface of the engagement groove which connects to the outer edge portion is chamfered.

6. The turbo charger according to claim 1 , wherein the terminal end of the outer wall portion of the compressor housing is chamfered to match the outer radial surface of the engagement groove.

Assignees

• Toyota Motor Co Ltd
• Otics Corp

Inventors

• Yonezawa Koichi
• Osuka Ryu

Classifications

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02B39/00 Primary

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title