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EXHAUST GAS RECIRCULATION SYSTEM

20180347514 · 2018-12-06

    Inventors

    Cpc classification

    International classification

    Abstract

    An exhaust gas recirculation system (12) comprises at least one exhaust gas recirculation line (13) which, in the direction of flow, branches off from an exhaust gas pipe (14) after an exhaust gas turbine (2) and/or a particulate filter (4) and/or a catalytic converter; in the direction of flow, opens out into a supply-air line (15) after a turbo-compressor (3) and comprises in its course at least one pump (11).

    Claims

    1.-8. (canceled)

    9. An exhaust gas recirculation system with at least one exhaust gas recirculation line which, in the direction of flow, branches off after an exhaust gas turbine and/or a particulate filter and/or a catalytic converter from an exhaust gas pipe, in the direction of flow opens out after a turbo-compressor into a supply-air line and comprises in its course at least one pump.

    10. An exhaust gas recirculation system as in claim 9, further comprising at least one filter in the exhaust gas recirculation line.

    11. An exhaust gas recirculation system according to claim 9, further comprising an exhaust gas cooler in the exhaust gas recirculation line.

    12. An exhaust gas recirculation system according to claim 9, further comprising an exhaust gas recirculation valve is provided in the exhaust gas recirculation line.

    13. An exhaust gas recirculation system according to claim 11, further comprising a bypass line circumventing the exhaust gas cooler.

    14. An exhaust gas recirculation system as in claim 13, further comprising a bypass valve upstream of the exhaust gas cooler.

    15. An exhaust gas recirculation system according to claim 9, further comprising a charge-air cooler downstream of the turbo-compressor.

    16. An exhaust gas recirculation system according to claim 15, wherein the exhaust gas recirculation line opens out into the supply-air line downstream of the charge-air cooler.

    17. An exhaust gas recirculation system as in claim 12, further comprising a bypass line circumventing the exhaust gas cooler.

    18. An exhaust gas recirculation system according to claim 10, further comprising an exhaust gas recirculation valve in the exhaust gas recirculation line.

    19. An exhaust gas recirculation system according to claim 11, further comprising an exhaust gas recirculation valve in the exhaust gas recirculation line.

    20. An exhaust gas recirculation system according to claim 10, further comprising a charge-air cooler downstream of the turbo-compressor.

    21. An exhaust gas recirculation system according to claim 11, further comprising a charge-air cooler downstream of the turbo-compressor.

    22. An exhaust gas recirculation system according to claim 12, further comprising a charge-air cooler downstream of the turbo-compressor.

    23. An exhaust gas recirculation system according to claim 13, further comprising a charge-air cooler downstream of the turbo-compressor.

    24. An exhaust gas recirculation system according to claim 14, further comprising a charge-air cooler downstream of the turbo-compressor.

    Description

    BRIEF DESCRIPTION OF THE DRAWING

    [0016] In the following an embodiment example of the invention depicted in the drawing will be described in further detail.

    [0017] The FIGURE shows schematically the exhaust gas recirculation system according to the invention.

    DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION

    [0018] As is shown in the FIGURE, an exhaust gas pipe 14 leads from an internal combustion engine 1, first through an exhaust gas turbine 2 and a diesel particulate filter 4 before the exhaust gas recirculation line 13 is branched off. For the purpose described above, in the exhaust gas recirculation line [13] is disposed, first, a filter 5, downstream thereof a pump 11, and further downstream a bypass valve 10 with a bypass line 16 branching off therefrom, circumventing cooler 7. Downstream of the cooler 7 the bypass line 16 opens out into the exhaust gas recirculation line 13 and before the opening-out site into the supply-air line 15 preferably, even though not mandatorily, an exhaust gas recirculation valve 8 is provided. As is further shown in the FIGURE, the exhaust gas recirculation line 13 opens out into the supply-air line 15 downstream of a turbocharger 3 and charge-air cooler 9, or, stated differently, on the high-pressure side. In contrast, the exhaust gas recirculation line 13 branches off from the exhaust gas pipe 14 on the low-pressure side such that the above described hybrid system with its advantages is obtained.