# US 2014/0150754 A1 · Compressor housing and exhaust gas turbine supercharger

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- Number: US 2014/0150754 A1
- Document ID: US20140150754A1
- Status: Published application
- Kind: A1
- Application number: 13/511,077
- Filed: 2011-08-10
- Published: 2014-06-05
- Earliest claimed: 2011-08-10
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Norihiko Sumi
- Web page: https://patentgrep.com/patent/US20140150754A1

## CPC

- F02B 33/02: Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B 37/16: by bypassing charging air
- F02B 39/00: Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F04D 17/10: for compressing or evacuating
- F04D 29/4206: {especially adapted for elastic fluid pumps}
- F02M 25/06: adding lubricant vapours
- F05D 2220/40: in turbochargers
- F05D 2250/312: the axes being parallel to each other
- F05D 2250/314: the axes being inclined in relation to each other
- F05D 2260/606: Bypassing the fluid
- Y02T 10/12: Improving ICE efficiencies
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A compressor housing includes a housing body for enclosing an impeller, an inlet portion for introducing air toward the impeller, and a port portion arranged adjacent to the inlet portion. A valve body for opening and closing a bypass passage, which bypasses the impeller, can be rested against the port portion. A connection hole, to which a return passage for returning blow-by gas of an internal combustion engine is connected, is formed in a side wall of the inlet portion. The inlet portion and the port portion have a common wall. A communication hole, which configures a part of the return passage, is formed in the common wall. The communication hole is formed such that the projection plane defined by projecting the communication hole onto a surface of the side wall having the connection hole along the axis of the communication hole is contained in the connection hole.

## Claims

### Claim 1

A compressor housing for enclosing an impeller, the compressor housing comprising an inlet portion for introducing air toward the impeller and a port portion arranged adjacent to the inlet portion, a valve body for selectively opening and closing a bypass passage that bypasses the impeller in which the valve body can be rested against the port portion, wherein
one of a side wall of the inlet portion and a side wall of the port portion has a connection hole to which a return passage for returning blow-by gas of an internal combustion engine is connected,
a communication hole configuring a part of the return passage is formed in each of the side wall of the inlet portion and the side wall of the port portion, and
the communication hole is formed such that a projection plane defined by projecting the communication hole onto a wall surface having the connection hole along the axis of the communication hole is contained in the connection hole.

### Claim 2 (depends on 1)

The compressor housing according to claim 1, wherein the connection hole and the communication hole are arranged coaxially with each other.

### Claim 3 (depends on 1)

The compressor housing according to claim 1 wherein
the inlet portion and the port portion have a common side wall, and
the communication hole is formed in the common side wall.

### Claim 4 (depends on 1)

The compressor housing according to claim 1, wherein the connection hole is formed in the side wall of the inlet portion.

### Claim 5 (depends on 1)

The compressor housing according to claim 1, wherein the inner diameter of the connection hole is equal to the inner diameter of the communication hole.

### Claim 6 (depends on 1)

exhaust gas turbine supercharger comprising the compressor housing according to claim 1, wherein the supercharger performs supercharging by rotating the impeller using energy produced by exhaust gas.