Device and method for controlling the injection of air and exhaust gas at the intake of a supercharged internal-combustion engine

Patent metadata

Field	Value
Publication number	US-10704476-B2
Application number	US-201716308903-A
Country	US
Kind code	B2
Filing date	Jun 27, 2017
Priority date	Jun 30, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

The present invention relates to a device for controlling the amount of air fed to the intake of a turbocharged internal-combustion engine comprising a turbocharging system including a turbocharger (7) with a turbine (8) connected to at least one exhaust gas outlet of said engine, as well as an outside air compressor (10), a line (15, 18) for partial transfer of the compressed air from the compressor to the turbine inlet, and an EGR line (18, 21) between an exhaust gas outlet and a compressed air intake line (4). The device is characterized in that the partial transfer line and the EGR line share at least one common portion (18).

First claim

The invention claimed is:

1. A device for controlling the amount of air fed to the intake of a turbocharged internal-combustion engine comprising:
a turbocharging system including a turbocharger with a turbine connected to at least one exhaust gas outlet of the engine, and an outside air compressor,
a partial compressed air transfer line for partial transfer of compressed air from the outside air compressor to an inlet of the turbine,
an exhaust gas recirculation line between an exhaust gas outlet of the internal-combustion engine and a compressed air intake line of the internal-combustion engine, and
a controlled throttling system for controlling the exhaust gas recirculation or the partial compressed air transfer to the turbine inlet comprising a proportional valve on the exhaust gas recirculation line and a proportional valve on the partial compressed air transfer line,
wherein the partial compressed air transfer line and the exhaust gas recirculation line share at least one common portion.

2. A device as claimed in claim 1 , wherein the partial compressed air transfer line is connected either upstream or downstream from a heat exchanger on the compressed air line.

3. A device as clamed in claim 1 , wherein the partial compressed air transfer line comprises an exchanger for the exhaust gas recirculation.

4. A method for controlling the amount of air fed to the intake of a turbocharged internal-combustion engine comprising a turbocharging system including a turbocharger with a turbine connected to at least one exhaust gas outlet of the engine, and an outside air compressor, a partial compressed air line for partial transfer of compressed air from the compressor to an inlet of the turbine, an exhaust gas recirculation line between an exhaust gas outlet of the internal-combustion engine and a compressed air intake line of the internal-combustion engine, and a controlled throttling system for controlling the exhaust gas recirculation or the partial compressed air transfer to the turbine inlet comprising a proportional valve on the exhaust gas recirculation line and a proportional valve on the partial compressed air transfer line, wherein a shared line portion is used for the partial compressed air transfer line and the exhaust gas recirculation line.

5. Application of the device as claimed in claim 1 to a diesel engine.

6. Application of the method as claimed in claim 4 to a diesel engine.

7. A diesel engine comprising the device for controlling the amount of air fed to the intake as claimed in claim 1 .

8. A method as claimed in claim 4 , wherein the turbocharged internal-combustion engine is a diesel engine.

Assignees

• Ifp Energies Now

Inventors

• Colliou Thierry
• Walter Bruno
• Venturi Stephane

Classifications

• Y02T10/40

  Engine management systems · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B37/168

  into the exhaust conduit (F02B37/166 takes precedence) · CPC title

• F02M26/05

  High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor · CPC title

• F02D41/0007 Primary

  for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12) · CPC title