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# Valve Cam Exercise - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' Valve Cam Exercise' - shea

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Presentation Transcript

• 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

• Define Moving and Ground Parts

rocker

rocker_shaft

valve_guide

shaft_mount

camshaft

valve

Valve_Cam.sldasm

Angular Velocity = 36,000 deg/s

Select face

• Points Per Curve = 20

• Check Intermittent Contact box

ARROWS MUST POINT INSIDE SOLID

Add contact between valve and rocker

• Points Per Curve = 20

• Check Intermittent Contact box

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

• Modify Contact Properties for both Contacts

Pick origin for valve

Pick origin for valve_guide

• Set Simulation Parameters

Run Simulation

• Plot Results

Cam and Rocker Contact Force

Valve and Rocker Contact Force

• Modify Spring

• Stiffness = 150 N/mm

• Free Length = 45 mm

• Re-run Simulation

Contact Between Valve and Cam