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(11) | EP 2 322 787 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Exhaust gas recirculation system |
| (57) An exhaust gas recirculation system includes an induction passageway (23) through
which fresh air flows and an annular flow path (62) extending in a circumferential
direction of the induction passageway (23) and formed in an annular shape. The annular
flow path (62) encompasses the induction passageway (23) therein. An inlet port (63)
is formed between the induction passageway (23) and the annular flow path (62) and
communicates the induction passageway with the annular flow path. An exhaust gas introduction
flow path (80) is communicated with the annular flow path (62) and introduces the
exhaust gases into the annular flow path (62) so that the exhaust gases flow in one
direction of the circumferential direction. The annular flow path (62) has an inner
face facing the inlet port (63), and the inner face has a width (w2) in a direction
crossing the one direction. An upstream side of the width (w2) is shorter than a downstream
side of the width (w2) with respect to a flow of the exhaust gasses which flows into
the annular flow path (62) from the exhaust gas introduction flow path (80).
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