| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a secondary air supply system with a simple structure, suppressing generation of condensate water near a control valve. <P>SOLUTION: A supply pipe 10 is connected with an exhaust pipe 3 and has a supply passage 11 communicates with an exhaust passage 4 therein. A pump 20 is disposed on a side opposite to the exhaust pipe 3 of the supply pipe 10, and supplies air to the exhaust passage 4 via the supply passage 11. A control valve device 30 is disposed between the exhaust pipe 3 and the pump 20 to shut off or release the supply passage 11. A check valve 40 is disposed between the exhaust pipe 3 and the control valve device 30, and shuts off or release the supply passage 11 to shut off a flow of exhaust from the exhaust passage 4 to a control valve device 30 side. The check valve 40 is disposed to the supply passage 11 between the exhaust pipe 3 and the control valve device 30 to be closer to the exhaust pipe 3 than the control valve device 30. <P>COPYRIGHT: (C)2013,JPO&INPIT |
