| 摘要 |
PROBLEM TO BE SOLVED: To provide a purge buffer device capable of mitigate a rise in the concentration of purge gas introduced to an intake system at the start of purge treatment. SOLUTION: The purge buffer device 3 arranged in a purge path introducing purge gas discharged from an adsorption layer in a canister to an intake system of an internal combustion engine and temporarily adsorbing a fuel component in purge gas by the adsorption layer 31 formed in a case 30 is provided with a flow adjustment structure forming passage characteristics in the case 30 making part of the fuel component in purge gas pass through the case 30 preceding others at a early stage after starting the introduction of purge gas into the case 30. A flow adjustment structure is obtained by establishing the route length of the adsorption layer 31 uneven, for example, by forming a step 31c on the outlet side end surface 31b of the adsorption layer 31. COPYRIGHT: (C)2007,JPO&INPIT
|
