METHOD OF CONTROLLING AN AFTER-TREATMENT SYSTEM WARM-UP

1 . A method of controlling an internal combustion engine, the internal combustion engine comprising a low pressure EGR cooler by-pass circuit and a control valve, the method comprising the steps of:

determining if a first enabling condition is met; and

controlling an opening of said low pressure EGR cooler by-pass circuit with said control valve if the first enabling condition is met.

2 . The method according to claim 1 , wherein the internal combustion engine further comprises an intercooler by-pass circuit and a second control valve and the method further comprising the steps of:

determining if a second enabling condition is met; and

controlling the opening of said intercooler by-pass circuit with said second control valve, if the second enabling condition is met.

3 . The method according to claim 1 , wherein said first enabling condition is active regeneration of a particulate filter.

4 . The method according to claim 2 , wherein the second enabling condition is an intake manifold temperature below a threshold.

5 . An internal combustion engine of an automotive system, the internal combustion engine comprising:

an EGR cooler by-pass circuit;

a control valve; and

a processor configured to control the control valve, the processor further configured to:

determine if a first enabling condition is met; and

control an opening of said EGR cooler by-pass circuit with said control valve if the first enabling condition is met.

6 . The internal combustion engine of an automotive system according to claim 5 , the internal combustion engine further comprising

an intercooler by-pass circuit; and

a second control valve,

processor further configured to:

determine if a second enabling condition is met; and

control the opening of said intercooler by-pass circuit with said second control valve if the second enabling condition is met.

7 . (canceled)

8 . (canceled)

9 . (canceled)

10 . (canceled)

11 . The method according to claim 1 , wherein said first enabling condition is an inlet oxidation catalyst temperature below an inlet oxidation catalyst temperature target.

12 . The method according to claim 1 , wherein said first enabling condition is outlet compressor temperature below a threshold.

13 . The internal combustion engine according to claim 5 , wherein said first enabling condition is active regeneration of a particulate filter.

14 . The method according to claim 5 , wherein said first enabling condition is an inlet oxidation catalyst temperature below an inlet oxidation catalyst temperature target.

15 . The method according to claim 5 , wherein said first enabling condition is outlet compressor temperature below a threshold.

16 . A non-transitory computer readable medium embodying a computer program product, said computer program product comprising:

a control program for controlling an internal combustion engine that comprises a low pressure EGR cooler by-pass circuit and a control valve, the control program configured to:

determine if a first enabling condition is met; and

control an opening of said low pressure EGR cooler by-pass circuit with said control valve if the first enabling condition is met.

17 . The non-transitory computer readable medium embodying the computer program product according to claim 16 , wherein the internal combustion engine further comprises an intercooler by-pass circuit and a second control valve, the control program further configured to:

determine if a second enabling condition is met; and

opening said intercooler by-pass circuit with said control valve if the second enabling condition is met.

18 . The non-transitory computer readable medium embodying the computer program product according to claim 16 , wherein said first enabling condition is active regeneration of a particulate filter.

19 . The non-transitory computer readable medium embodying the computer program product according to claim 16 , wherein said first enabling condition is active regeneration of a particulate filter.

20 . The non-transitory computer readable medium embodying the computer program product according to claim 16 , wherein said first enabling condition is an inlet oxidation catalyst temperature below an inlet oxidation catalyst temperature target.

21 . The method according to claim 5 , wherein said first enabling condition is outlet compressor temperature below a threshold.

22 . The method according to claim 6 , wherein the second enabling condition is an intake manifold temperature below a threshold.