Admission line

The utility model provides an admission line which is suitable for the air inlet that is connected to the cylinder head have among the admission line: partition portion, partition portion extends along the flow direction of admitting air, main entrance and saying as the circulation of rolling of vice passageway, said main entrance with said roll the circulation say by said partition portion is injectd, and valve, the valve opens and cuts out said main entrance. It is formed with the messenger to roll admitting air of circulation way between ascending head-end of stream and the low reaches end roll the restriction portion of the cross sectional area minimizing of circulation way. Roll the cross sectional area follow that the circulation was said said head-end orientation restriction portion reduces and follow said restriction portion orientation the end increase of said low reaches. Velocity of flow increase when the restriction portion of vice passageway makes the flow direction restriction portion of admitting air in vice passageway. This has strengthened admitting air producedly such as rolling the flow of flowing etc. When flowing through vice passageway. Consequently, when the engine burning trends towards the unstability, such as during the cold start, can make the engine burning stablize