Challenge

MBD Simulation on IC Engine Valve Train

Objective:-

To design and model the IC Engine Valve Train.
To provide 1500 rpm constant rotatory motion to the Cam.
To run the simulation of the model after properly assembling it.
To Calculate the distance between the center circles of Cam while designing, as per the given cam lift(by using Cam loft formula.
Use Cast Carbon Steel as material for all the parts.
Calculate the linear displacement, the contact force between
- Cam and Push Rod
- Push Rod and Rocker arm
- Rocker arm and Valve
And Plot graphs
Do the same calculation and plot graphs for two different Cam lifts.
Conclude Results.

Introduction:-

Theory:-

In this model when we provide power to the Cam then because of the transfer of power the valve starts to have a reciprocating motion.
First, we calculated the cam lift by using the Cam lift formula given in the challenge

By using this formula we calculated the distance between the two circles of the cam, as the cam lift is already given in the challenge
- For Cam lift = 3.5mm
  - since R1= 12.5mm
  - R2= 5mm
  - So L= 3.5+ 12.5-5
  - L= 11mm
- For Cam lift = 6mm
  - R1= 12.5mm
  - R2= 5mm
  - So L= 6+12.5-5
  - L= 13.5mm

Then we assembled the model after designing it properly by providing the required constraints.
After assembling the model we moved to SolidWorks motions
then there we first provided clockwise constant rotation to the Cam.
Then we added a spring between the face of the valve mount and the valve of 10N/mm2 and 45mm length.
Then we changed the material of the components to cast carbon steel.
Then we did the motion analysis.

Results:-