| 摘要 |
An intake system of an engine may include an intake line that is configured to supply cylinder of an engine with air, an exhaust line that exhaust gas combusted in the cylinder is exhausted, a housing disposed on the intake line and a compressor is disposed therein, the compressor is operated by a turbine disposed on an exhaust line, a recirculation line that recirculates the air from the intake line of a downstream side of the compressor to the intake line of an upstream side of the compressor, and an anti surge valve disposed on the recirculation line to open/close the recirculation line, wherein a length of a first section (l) that is straight from the anti surge valve is longer than two times the outlet diameter (d) of the anti surge valve in the recirculation line that is formed from the anti surge valve to an upstream side of the compressor. A distance (L) from the intake line that is connected to the recirculation line to the inlet of the housing may be longer than times the inlet diameter (D) of the housing that the compressor is disposed therein. Accordingly, while the intake air circulates the anti surge valve during a tip-out or acceleration period, the turbulent flow may be decreased and the flowing becomes smooth such that the noise is decreased and the emotional quality may be improved in the intake system of the engine.
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