| 摘要 |
PURPOSE:To simplify a constitution and to reduce a cost in comparison with conventional devies which control an exhaust gas recycling operation in individual response to the detection of a suction load or the detection of the reduction in pressure, by a method wherein a subject device is constituted such that an exhaust gas backflow operation can be regulated by operating a negative pressure switch in response to both the detection of a suction negative pressure and the detection of the reduction in the pressure during the reduction in speed. CONSTITUTION:An exhaust gas recycling controller is constituted such that an EGR valve 7 is located between an exhaust gas recycling path 4 and a negative pressure chamber 6 whereinto a suction negative pressure is fed through a path 5, and an electromagnetic valve 10, which is opened and connects the path 5 to the air with solenoid charged with electricity resulting from the operation of a negative pressure switch 8 for detecting a high negative pressure during the reduction in the speed of an engine, is mounted at the path 5. The negative pressure switch 8 is partitioned into an air chamber 14 and a negative pressure chamber 12 with a diaphragm 13, and the negative pressure chamber 12 is connected to a suction path 3 through a negative pressure chamber 15. A negative pressure valve 17 having a bellows 16 serving as an atmosphere pressure supplementary system is located at the negative pressure path 15, and the valve 17 is constituted such that it works as a type which has the diaphragm 13 for common use. |
