A mechanical valve used in internal combustion engines to control intake or exhaust flow

// Engine Valve
// A mechanical valve used in internal combustion engines to control intake or exhaust flow
// Categories: Automotive

@settings(defaultLengthUnit = mm, kclVersion = 1.0)

// Define parameters
valveDiameter = 30
valveLength = 120
valveHeadLength = valveDiameter * 1.0
valveHeadThickness = 3
stemDiameter = 6
stemHeadLength = 9
stemLength = valveLength - valveHeadLength - stemHeadLength

// Create the valve head
valveRadius = valveDiameter / 2
valveHeadPlane = startSketchOn(XZ)
valveHeadShape = startProfile(valveHeadPlane, at = [-0.01, valveHeadLength])
  |> xLine(length = 0.01 - (stemDiameter / 2))
  |> line(endAbsolute = [0.01 - (stemDiameter / 2), valveRadius])
  |> tangentialArc(endAbsolute = [-0.8 * valveRadius, valveHeadThickness], tag = $seg01)
  |> tangentialArc(endAbsolute = [-valveRadius, 0])
  |> xLine(length = 0.3 * valveRadius)
  |> arc(
       interiorAbsolute = [
         -0.34 * valveRadius,
         0.08 * valveRadius
       ],
       endAbsolute = [
         -0.02 * valveRadius,
         0.11 * valveRadius
       ],
     )
  |> line(endAbsolute = [profileStartX(%), profileStartY(%)])
  |> close()
valveHead = revolve(valveHeadShape, angle = 360, axis = Y)

// Create the valve stem
valveStemSketch = startSketchOn(offsetPlane(XY, offset = valveHeadLength))
  |> circle(center = [0, 0], radius = stemDiameter / 2)
  |> extrude(length = stemLength - valveHeadLength - stemHeadLength)

// Create the valve stem end
stepLength = stemHeadLength / 10
step1 = startSketchOn(valveStemSketch, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.9)
  |> extrude(length = stepLength * 2)
step2 = startSketchOn(step1, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.8)
  |> extrude(length = stepLength)
step3 = startSketchOn(step2, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.9)
  |> extrude(length = stepLength)
step4 = startSketchOn(step3, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.8)
  |> extrude(length = stepLength)
step5 = startSketchOn(step4, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.9)
  |> extrude(length = stepLength)
step6 = startSketchOn(step5, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.8)
  |> extrude(length = stepLength)
step7 = startSketchOn(step6, face = END)
  |> circle(center = [0, 0], radius = stemDiameter / 2 * 0.9, tag = $seg02)
  |> extrude(length = stepLength * 3, tagEnd = $capEnd001)
  |> chamfer(
       length = 0.5,
       tags = [
         getCommonEdge(faces = [seg02, capEnd001])
       ],
     )


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engine-valve