IC Engine Valve mechanism simulation using MSC ADAMS

Published on 16 Apr 2022. Written by Dineshkumar E

ADAMS is a simulation software widely used by OEMs to test their product by performing various multi-body dynamic simulation to identify the errors and defects. This helps the manufactures to reduce the cost of production. In this tutorial, we will perform a simulation for IC Engine valve mechanism using MSC ADAMS software.

IC engine or Internal combustion engines are the prime movers of the automobile. It converts the heat into work thus the IC engine is also called heat engine. In order to increase the efficiency of the engine, the inlet and exhaust valves should open and close properly. Due to the rapid combustion process, the force exerted over the valve will be more. The actual force exerted over the valve will be difficult to calculate so ADAMS software is used to detect the force exerted on the valves.

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SLNOTE
Project implementation

We are going to perform the analysis for a single-cylinder IC engine. Design the model with the help of CAD software like Autodesk, CATIA, SOLIDWORKS, etc.

Import the designed model in Parasolid (.x_t) format into the ADAMS workspace. To import goto file> import and choose the model using the guess option.

After importing you can able to see different components under Bodies folder. Now we will select the material for the components, double click on the component to which you want to select the material. Set the category as Geometry and Density and choose the material type. Always use the guess option to select a suitable material.

Similarly, select the material for other components also. Next, we will choose the movements for the components GoTo connector > joints > Revoulute joint. Set revolute joint for crankshaft and camshaft. Then lock the spring retainer and rocker arm shaft.

Now we will set the forces acting on the components. Select the contact surfaces such as rocker arm, valve ends, cams, rods, etc.  Set the spring dampener for the inlet and outlet valves.

Now, Setup the machinery components. For that import the gears to synchronize the crankshaft motion with the camshaft. Goto machinery > Gears. Set the gear types as spur and method as simplified and input the geometry, number of teeth and width of the gear.

Here the inlet and exhaust valves are operated based on the crankshaft rotation which is connected to the piston. When the piston moves down the inlet valve will open and when the piston moves up the exhaust valve will open.

Assign the gears to the crankshaft and camshaft and impose the motions for the gears. Now click on the simulation to perform the actual simulation of the imported model.

Now we will plot a graph for the simulation process. Click on the postprocessor and load the animation into the postprocessor window select the engine valve under the display units to create the graph curves.    

SLLATEST
Advantages of ADAMS

• Enables the manufactures to perform the simulation for their products without manufacturing it.
• Compared to analytical model results are more accurate.
• Helps to find the behaviour of the system.
• Allows users to perform the simulation according to real-world physics.

SLDYK
Kit required to develop IC Engine Valve mechanism simulation using MSC ADAMS:

• ADAMS

Technologies you will learn by working on IC Engine Valve mechanism simulation using MSC ADAMS:

• ADAMS
• Mechanical
• Analysis

Any Questions?