Boosted internal combustion engine with partial deactivation and method for the operation of an internal combustion engine of said type

Patent metadata

Field	Value
Publication number	US-9587589-B2
Application number	US-201514604467-A
Country	US
Kind code	B2
Filing date	Jan 23, 2015
Priority date	Jan 23, 2014
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

An internal combustion engine system is provided herein. The internal combustion engine includes an active cylinder, a selectively deactivatable cylinder, the active cylinder and selectively deactivatable cylinder each coupled to an intake system and exhaust-gas discharge system, an exhaust-gas turbocharger having a turbine positioned in the exhaust-gas discharge system and a compressor positioned in the intake system, a blower positioned in the intake system downstream of the compressor, and a bypass line bypassing the blower and including a shut-off valve.

First claim

The invention claimed is:

1. An internal combustion engine comprising:
an active cylinder;
a selectively deactivatable cylinder, the active cylinder and the selectively deactivatable cylinder each coupled to an intake system and an exhaust-gas discharge system, and the selectively deactivatable cylinder further coupled to an exhaust gas recirculation (EGR) line, the EGR line coupled directly upstream and downstream of the selectively deactivatable cylinder;
an exhaust-gas turbocharger having a turbine positioned in the exhaust-gas discharge system and a compressor positioned in the intake system;
a blower positioned in the intake system downstream of the compressor; and
a bypass line bypassing the blower and including a shut-off valve.

2. The internal combustion engine of claim 1 , further comprising a controller configured to deactivate the selectively deactivatable cylinder during a selected time interval and operate the blower and the shut-off valve to provide a predetermined amount of charge-air flow to the active cylinder during the selected time interval.

3. The internal combustion engine of claim 1 , where the blower is mechanically driven.

4. The internal combustion engine of claim 1 , further comprising an EGR valve positioned in the EGR line.

5. The internal combustion engine of claim 4 , further comprising a controller configured to open the EGR valve during deactivation of the selectively deactivatable cylinder and close the EGR valve.

6. An internal combustion engine comprising:
one or more cylinders in a first group formed as active cylinders which operate in the event of partial cylinder deactivation;
one or more cylinders in a second group formed as a load-dependently deactivatably switchable cylinders, each of the cylinders in the first and second groups coupled to an intake system and an exhaust-gas discharge system, where the load-dependently deactivatably switchable cylinders are each further coupled to an EGR line, the EGR line including an EGR shut-off element positioned therein, and where the active cylinders are not coupled to the EGR line;
an exhaust-gas turbocharger including a turbine arranged in the exhaust-gas discharge system and a compressor arranged in the intake system;
a blower positioned in the intake system downstream of the compressor; and
a bypass line branching off from the intake system between the compressor and the blower and issuing into the intake system downstream of the blower, where a bypass shut-off element is positioned in the bypass line.

7. The supercharged internal combustion engine of claim 6 , where an inlet side of each of the cylinders in the second group is equipped at least with a variable valve assembly.

8. The internal combustion engine of claim 6 , where an intake line associated with each of the cylinders in the second group is equipped with an intake shut-off element.

9. The supercharged internal combustion engine of claim 8 , where the intake shut-off element is switchable in a two-stage fashion between a closed position and an open position.

10. The internal combustion engine of claim 8 , where the intake shut-off element is continuously adjustable.

11. The internal combustion engine of claim 6 , further comprising a controller including instructions for:
opening the EGR shut-off element when the deactivatable cylinders are deactivated; and
closing the EGR shut-off element when the deactivatable cylinders are activated.

12. The internal combustion engine of claim 11 , where the EGR line branches off from the exhaust-gas discharge system upstream of an exhaust shut-off element and issues into an intake system of the cylinders in the second group.

13. The internal combustion engine of claim 6 , where the blower is a mechanically driven blower.

14. The internal combustion engine of claim 6 , where the blower is an electrically driven blower.

15. The internal combustion engine of claim 6 , where the blower is configured to increase a charge-air flow rate provided by the intake system during partial deactivation of the cylinders in the second group.

16. The internal combustion engine of claim 6 , where both the first group and the second group are arranged in an in-line cylinder configuration.

17. A method for operating an internal combustion engine comprising:
performing combustion operation in a cylinder in a first group and a cylinder in a second group, each of the cylinders in the first and second groups coupled to an intake system and an exhaust-gas discharge system, the cylinder in the second group formed as a load-dependently deactivatably switchable cylinder and the cylinder in the first group formed as an active cylinder;
operating a turbocharger including a turbine arranged in the exhaust-gas discharge system and a compressor arranged in the intake system to provide charge air to the cylinder in the first group and the cylinder in the second group while combustion is performed in the cylinders;
switching the cylinder in the second group as a function of a load of the internal combustion engine such that that the cylinder in the second group is deactivated; and
during deactivation of the cylinder in the second group, operating a blower positioned in the intake system downstream of the compressor to provide a predetermined amount of charge-air flow to the cylinder in the first group, the deactivated cylinder in the second group operated to pump recirculated exhaust gas from an inlet side to an outlet side of the deactivated cylinder.

18. The method of claim 17 , where a supply of charge air provided by the turbocharger to the cylinder in the second group is reduced or stopped during deactivation of the cylinder in the second group.

19. The method of claim 17 , where, during deactivation of the cylinder in the second group, the exhaust gas is flowed into the cylinder of the second group via operation of an exhaust gas recirculation (EGR) valve positioned in an EGR line coupled directly upstream and downstream of the cylinder of the second group.

20. The method of claim 17 , where the blower is mechanically driven.

Assignees

• Ford Global Tech Llc

Inventors

• Kemmerling Joerg
• Sommerhoff Franz Arnd
• Kindl Helmut Matthias
• Smiljanovski Vanco
• Willems Werner
• Kuske Andreas

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02D41/0007

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

• F02M26/08 Primary

  for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor · CPC title

• F02M25/0706 Primary

  Mechanical Engineering · mapped topic

• F02D17/02

  Cutting-out (cutting-out engines in multiple engine arrangements F02D25/04) · CPC title