| 摘要 |
<p>An air by-pass valve with pressure relief feature is described. The valve is provided with inlet, outlet and by-pass or exhaust ports wherein two valve members are actuated by a diaphragm responsive to engine intake manifold vacuum to direct air from the inlet to the outlet or to the by-pass port as a function of engine intake vacuum and in which the valve members are mounted on a common diaphragm-actuated stem in such a manner that the by-pass valve member can move to open the by-pass port during over-pressure conditions without movement of the diaphragm or valve stem.</p> |
