| 摘要 |
The position of the recirculation valve 11 is determined by a pair of spring-loaded diaphragms 18 and 20 subject in the chamber 19 between them to the suction downstream of a carburettor throttle valve and on their other sides to atmospheric pressure. The initial loading of the diaphragm 18 by a spring 31 is set by a sleeve 26 carried by the diaphragm 20 and the compression of a spring 32, biasing the diaphragm 20, at which the valve stem 13 is engaged by the screw 27 carried by the diaphragm 20 to close the valve 11 is set by screw adjustment. In operation, at high idling suction the diaphragm 20 causes the valve 11 to close via the screw 27, at low suction suction corresponding to high engine output the spring 31 biases the valve closed and at intermediate suctions the valve opening will be dependent upon the diaphragm areas and spring forces. <IMAGE> |
