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Valve Cam Exercise. Problem Statement Open Valve_Cam.sldasm The valve cam model pictured above includes a spring that will be added between the valve guide and the valve. The camshaft will be rotated at an angular velocity of 36,000 deg/s. Define Moving and Ground parts.

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Valve cam exercise
Valve Cam Exercise

  • Problem Statement

  • Open Valve_Cam.sldasm

  • The valve cam model pictured above includes a spring that will be added between the valve guide and the valve. The camshaft will be rotated at an angular velocity of 36,000 deg/s.

  • Define Moving and Ground parts.

  • Using curve/curve contact, create a spring with the correct stiffness and free length so that the camshaft and rocker are always in contact.

  • We are going to plot the:

  • Cam and Rocker contact force

  • Valve and Rocker contact force

  • Valve and cam contact force


Valve cam exercise1
Valve Cam Exercise

  • Define Moving and Ground Parts

rocker

rocker_shaft

valve_guide

shaft_mount

camshaft

valve

Valve_Cam.sldasm


Valve cam exercise2
Valve Cam Exercise

  • Add Revolute Motion

Angular Velocity = 36,000 deg/s


Valve cam exercise3
Valve Cam Exercise

  • Add Curve/Curve Intermittent Contact

Select face

  • Points Per Curve = 20

  • Check Intermittent Contact box

ARROWS MUST POINT INSIDE SOLID


Valve cam exercise4
Valve Cam Exercise

  • Add Curve/Curve Intermittent Contact

Add contact between valve and rocker

  • Points Per Curve = 20

  • Check Intermittent Contact box


Valve cam exercise5
Valve Cam Exercise

Ensure damping value and friction values are set according to dialog display

  • Modify Contact Properties for both Contacts


Valve cam exercise6
Valve Cam Exercise

Pick origin for valve

Pick origin for valve_guide

  • Add a Linear Spring


Valve cam exercise7
Valve Cam Exercise

  • Set Simulation Parameters

Run Simulation


Valve cam exercise8
Valve Cam Exercise

  • Plot Results

Cam and Rocker Contact Force

Valve and Rocker Contact Force


Valve cam exercise9
Valve Cam Exercise

  • Modify Spring

    • Stiffness = 150 N/mm

    • Free Length = 45 mm

  • Re-run Simulation

Contact Between Valve and Cam


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