505 L4-1971cc XN (1983)
Deceleration Valve: Description and Operation
Fig. 13 Deceleration vacuum valve
The main component of this system is the deceleration vacuum valve, Fig. 13. This consists of an aneroid capsule (15a), which is activated by intake
manifold vacuum (port 1). This capsule is connected to a barometric compensating diaphragm (15b) with manifold vacuum on one side (port 1) and
atmospheric pressure (PA) on the other side. The rod (15c) is activated by the expansion of the aneroid capsule (15a) and the movement of the
diaphragm (15b). During acceleration, ports 2 and 3 are connected. During deceleration, ports 1 and 2 are connected.