Performance Oriented Airflow of an Internal Combustion Engine
Location
CSU 202
Start Date
2-4-2019 1:05 PM
End Date
2-4-2019 2:05 PM
Student's Major
Automotive and Manufacturing Engineering Technology
Student's College
Science, Engineering and Technology
Mentor's Name
Gary Mead
Mentor's Department
Automotive and Manufacturing Engineering Technology
Mentor's College
Science, Engineering and Technology
Description
An internal combustion engine's performance, both in power and effective efficiencies, are largely affected by the engine's total volumetric efficiency; that is the effectiveness with which the engine utilizes it's cylinder displacement to pump clean air into the engine, and push out dirty exhaust before the cycle begins again. The more air pumped into the engine, or the more effectively it's done, the more power that can be made with the environment provided, or the greater fuel efficiency that can be achieved with the same engine displacement.
Therein lies a large portion of this project's research and development. The cylinder heads of an engine largely control the total amount of air that can be moved before a choked flow state is reached. The volumetric efficiency of the engine is largely determined by the effectiveness of the cylinder heads, and the respective intake and exhaust ports. Through use of a custom-grind camshaft, precision ground valves, high-strength valve springs, and a calculated machining job done to the ports and chamber in the cylinder heads, there has been a significant increase in allowable airflow into the engine, used to increase horsepower and engine torque. The cylinder heads use a SuperFlow 1020 flow bench to verify airflow abilities, and test for high and low velocity areas within each cylinder port. The camshaft is rolled on a machine and calculated with CamProPlus for determining all lobe lift values and analyzing peak airflow points based on valve lift and valve timing.
Performance Oriented Airflow of an Internal Combustion Engine
CSU 202
An internal combustion engine's performance, both in power and effective efficiencies, are largely affected by the engine's total volumetric efficiency; that is the effectiveness with which the engine utilizes it's cylinder displacement to pump clean air into the engine, and push out dirty exhaust before the cycle begins again. The more air pumped into the engine, or the more effectively it's done, the more power that can be made with the environment provided, or the greater fuel efficiency that can be achieved with the same engine displacement.
Therein lies a large portion of this project's research and development. The cylinder heads of an engine largely control the total amount of air that can be moved before a choked flow state is reached. The volumetric efficiency of the engine is largely determined by the effectiveness of the cylinder heads, and the respective intake and exhaust ports. Through use of a custom-grind camshaft, precision ground valves, high-strength valve springs, and a calculated machining job done to the ports and chamber in the cylinder heads, there has been a significant increase in allowable airflow into the engine, used to increase horsepower and engine torque. The cylinder heads use a SuperFlow 1020 flow bench to verify airflow abilities, and test for high and low velocity areas within each cylinder port. The camshaft is rolled on a machine and calculated with CamProPlus for determining all lobe lift values and analyzing peak airflow points based on valve lift and valve timing.
Recommended Citation
Zimmerman, Steven and Andrew Straka. "Performance Oriented Airflow of an Internal Combustion Engine." Undergraduate Research Symposium, Mankato, MN, April 2, 2019.
https://cornerstone.lib.mnsu.edu/urs/2019/oral-session-08/1
