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techtalk:ref:engmech04a [2019/11/14 06:09]
hippysmack [Dissecting the Hayden KVP38 Crankcase Breather Valve]
techtalk:ref:engmech04a [2019/11/14 06:14] (current)
hippysmack [Dissecting the Hayden KVP38 Crankcase Breather Valve]
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 Comments on this information is shown in bold below. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=2073932&​page=39)) \\ Comments on this information is shown in bold below. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=2073932&​page=39)) \\
  
-{{:​techtalk:​ref:​engmech:​1hayden_breather_valve_drawing_by_hippysmack.jpg?​direct&​300|}} ((drawing by Hippysmack))+{{:​techtalk:​ref:​engmech:​hayden_breather_valve_drawing_by_hippysmack.jpg?​direct&​300|}} ((drawing by Hippysmack))
  
 //A crankcase breather valve for ventilation and pressure control within the crankcase of an internal combustion engine in which pistons stroke upwardly and downwardly in a synchronous movement. The valve is inserted into a breather hose which conducts gases into and out of the crankcase. The valve comprises a resilient valve member, preferably an elastomeric umbrella-type seal, spaced above a seal seat and forming a gap there between through which gases may flow either direction during portions of the pistons'​ stroke cycle. The valve construction permits three operating modes: firstly to permit the egress of positive pressure gas out of the crankcase and through the gap while the pistons stroke downwardly; secondly, to permit the ingress of a small amount of gas back through the gap into the crankcase when the crankcase pressure changes from positive to negative; and thirdly to check further ingress of gas into the crankcase at greater crankcase suctions, developed when the piston'​s are moving upwardly.// //A crankcase breather valve for ventilation and pressure control within the crankcase of an internal combustion engine in which pistons stroke upwardly and downwardly in a synchronous movement. The valve is inserted into a breather hose which conducts gases into and out of the crankcase. The valve comprises a resilient valve member, preferably an elastomeric umbrella-type seal, spaced above a seal seat and forming a gap there between through which gases may flow either direction during portions of the pistons'​ stroke cycle. The valve construction permits three operating modes: firstly to permit the egress of positive pressure gas out of the crankcase and through the gap while the pistons stroke downwardly; secondly, to permit the ingress of a small amount of gas back through the gap into the crankcase when the crankcase pressure changes from positive to negative; and thirdly to check further ingress of gas into the crankcase at greater crankcase suctions, developed when the piston'​s are moving upwardly.//