| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust reflux device capable of controlling reflux quantity of exhaust gas based on an oxygen content of the exhaust gas.SOLUTION: A valve 40 for controlling connection or interruption between an exhaust pipe 12 and a suction pipe 11 is provided on an exhaust reflux pipe 30 connected to the exhaust pipe 12 and the suction pipe 11. An oxygen content of exhaust gas detected by an oxygen sensor 50 whose sensor part is attached to the exhaust pipe 12 is converted into a voltage signal and outputted to a controller 60. The controller 60 comprised of a microprocessor controls an aperture of the valve 40 based on the voltage signal outputted from the oxygen sensor 50. When the oxygen content of the exhaust gas becomes a set value or more, the aperture of the valve 40 is made larger than 0%, and the exhaust gas containing oxygen of a high concentration flowing in the exhaust pipe 12 is refluxed to the suction pipe 11 through the exhaust reflux pipe 30. |
