| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel vapor treatment device which is small in size and can effectively send out fuel vapor to an intake passage of an internal combustion engine. <P>SOLUTION: An exhaust gas recirculation pipe 51 is connected to an exhaust pipe 41 of an engine 2 at its one end and connected to an intake pipe 31 at the other end, and makes the exhaust gas of the exhaust passage 42 flow back to the intake passage 34. A fuel vapor pipe 54 is connected to a fuel tank 21 at its one end and connected to the exhaust gas recirculation pipe 51 at the other end, and introduces fuel vapor to an exhaust gas recirculation passage 511 through a fuel vapor passage 541 which is formed inside the fuel vapor pipe. Then, when an EGR valve 521 and a purge valve 551 are valve-opened, the fuel vapor of the fuel vapor passage 541 is sucked to the exhaust gas recirculation passage 511 by negative pressure which is generated by the circulation of the exhaust gas in the exhaust gas recirculation passage 511, and the fuel vapor is introduced to the intake passage 34 by a flow of the exhaust gas of the exhaust gas recirculation passage 511 and sent to the engine 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
