Turbocharging system for use with internal combustion engine

Patent metadata

Field	Value
Publication number	US-9951723-B2
Application number	US-201514957829-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 12, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A turbocharging system for use with an internal combustion engine, which includes an exhaust gas feeding passage configured to feed exhaust gas of an internal combustion engine to a turbine unit; an exhaust gas passage configured to release the exhaust gas discharged from the turbine unit outside of the turbocharging system; an intake air passage configured to feed intake air into the compressor unit; a compressed air passage configured to feed compressed air discharged from the compressor unit to the internal combustion engine; an intercooler configured to cool the compressed air flowing through the compressed air passage; and an LPL-EGR passage configured to recirculate at least a part of the exhaust gas flowing through the exhaust gas passage, into the intake air passage, wherein the compressed air passage is provided with a cyclone-type collecting device arranged upstream of the intercooler to collect foreign substances contained in the compressed air.

First claim

What is claimed is:

1. A turbocharging system for use with an internal combustion engine, the turbocharging system comprising:
a turbocharger comprising a turbine unit and a compressor unit, the turbine unit comprising a turbine impeller, the compressor unit comprising a compressor impeller connected to the turbine impeller;
an exhaust gas feeding passage configured to feed exhaust gas of an internal combustion engine to the turbine unit;
an exhaust gas passage configured to release exhaust gas discharged from the turbine unit outside of the turbocharging system;
an intake air passage configured to feed intake air into the compressor unit;
a compressed air passage configured to feed compressed air discharged from the compressor unit to the internal combustion engine;
an intercooler configured to cool the compressed air flowing through the compressed air passage;
an LPL-EGR passage configured to recirculate at least a pan of the exhaust gas flowing through the exhaust gas passage, into the intake air passage;
a cyclone collecting device arranged in the compressed air passage and upstream of the intercooler, the cyclone collecting device configured to collect foreign substances contained in the compressed air; and
wherein the compressed air passage is provided with a bypass passage configured to bypass the cyclone collecting device, a bypass passage opening/closing section configured to open and close the bypass passage, and a bypass passage opening/closing controller being configured to control open/closed state of the bypass passage opening/closing section.

2. The turbocharging system for use with an internal combustion engine according to claim 1 , further comprising an LPL-EGR passage opening/closing section configured to open and close the LPL-EGR passage, wherein the bypass passage opening/closing controller is configured to control the bypass passage opening/closing section in such a manner that the bypass passage opening/closing section is closed when the LPL-EGR passage opening/closing section is open and the bypass passage opening/closing section is open when the LPL-EGR passage opening/closing section is closed.

3. The turbocharging system for use with an internal combustion engine according to claim 1 , further comprising: a reservoir configured to store substances collected by the cyclone collecting device; a collected substance releasing passage configured to release the collected substances stored in the reservoir; a releasing passage opening/closing section configured to open and close the collected substance releasing passage; and an opening/closing controller configured to control open/closed state of the releasing passage opening/closing section.

4. The turbocharging system for use with an internal combustion engine according to claim 3 , wherein the reservoir is located below a main body of the cyclone collecting device in an axial direction of the main body.

Assignees

• Otics Corp

Inventors

• Isogai Tomoyuki

Classifications

• F02M35/0223

  by centrifugal forces, e.g. cyclones · CPC title

• F02B29/04

  Cooling of air intake supply · CPC title

• F28F19/01

  by using means for separating solid materials from heat-exchange fluids, e.g. filters · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F02M35/042

  combined with other devices, e.g. heaters (F02M35/021, F02M35/06, F02M35/14 take precedence); for use other than engine air intake cleaning, e.g. air intake filters arranged in the fuel vapour recovery system · CPC title