Automated Design of a Single Cylinder Internal Combustion Engine

ME 630Spring 2015

California State University, Northridge

Project by:Bhavin Sampat

Siddhesh SawantDhaval Prajapati

Rahul GoregaonkarGurpreet Singh Sandhu

Instructor:Dr. Stewart Prince

In this overall study, we will: Design a single cylinder internal combustion engine, specifically the connecting rod

and crankshaft in such a way that their main features are easily manipulated, Perform a motion study on the assembly to yield force and motion information, Perform a stress simulation study in order to properly size components based on a

desired, factor of safety Automate the process.

Objective

Assumptions SolidWorks assembly has been created, consisting of block, crankshaft, piston wrist

pin, head, valves, cam and connecting rod parts. Piston and head material is aluminum, crank, valves, valve springs, wrist pin and

connecting rod are 1020 CD steel, block is cast iron. Any part of the engine can be added and altered to make a more “realistic” engine

design. Crankshaft has crank pin diameter “Dia_Cpin.” Starting dimensions are taken directly off of solid models, both stroke and bore are

fixed. 6. All static FOS are 2.5 based on Von Mises.

Position Analysis

SolidWorks MATLAB

Velocity Analysis

SolidWorks MATLAB

Acceleration Analysis

SolidWorks MATLAB

Force Analysis

SolidWorks MATLAB

Static Stress Study

• Static FOS - 35• Maximum Von Mises stress

Unbalanced Connecting Rod

Balancing for acceptable shaking forces

Static stress study after Balancing

• Static FOS - 94• Maximum Von Mises stress-

Model with Valve Train Assembly

Total Simulation

Conclusion We have optimized the engine using specific values. We have used software's like solid works, mat lab and

VBA to analyze our model. Done automation of the system and completed the loop. Reduced the shaking forces by adding balancing masses FOS comes out to be under permissible limits.