Event Title

Formula SAE Fuel Injection Placement

Location

CSU 204

Start Date

9-4-2012 1:00 PM

End Date

9-4-2012 2:00 PM

Student's Major

Automotive and Manufacturing Engineering Technology

Student's College

Science, Engineering and Technology

Mentor's Name

Bruce Jones

Mentor's Department

Automotive and Manufacturing Engineering Technology

Mentor's College

Science, Engineering and Technology

Description

Fuel injector placement contributes to engine performance, emission-output, and fuel efficiency. There are two methods of fuel injection. Direct fuel injection sprays fuel directly into the cylinder, and port injection sprays fuel into the air stream before it enters the cylinder. Although many manufacturers are starting to introduce direct fuel injection, port injection is still a viable means of fuel distribution within internal combustion engines. Just recently port injection has been implemented into small engine construction.

Before port injection most small engines were carbureted. Port injection is better than carburetion because fuel can be more accurately controlled as well as delivered much closer to the cylinder than a carburetor. Extensive research is necessary to gain a full understanding of fuel delivery capabilities for these types of applications. The overall goal of this project was to determine whether a single fuel injector should be located such that the spray pattern opposes or coincides with intake airflow in order to obtain better engine performance. Both methods were designed and constructed to be tested on a turbocharged single cylinder KTM 525 engine using a blend of 85% ethanol and 15% pump gasoline. Computer models were constructed prior to prototype development. Engine performance was tested and evaluated using the SuperFlow engine dynamometer. Using the parameters of horsepower output, intake temperature reduction, and stable air/fuel ratio to evaluate performance, it is predicted that the co-flow injector placement will be superior.

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Apr 9th, 1:00 PM Apr 9th, 2:00 PM

Formula SAE Fuel Injection Placement

CSU 204

Fuel injector placement contributes to engine performance, emission-output, and fuel efficiency. There are two methods of fuel injection. Direct fuel injection sprays fuel directly into the cylinder, and port injection sprays fuel into the air stream before it enters the cylinder. Although many manufacturers are starting to introduce direct fuel injection, port injection is still a viable means of fuel distribution within internal combustion engines. Just recently port injection has been implemented into small engine construction.

Before port injection most small engines were carbureted. Port injection is better than carburetion because fuel can be more accurately controlled as well as delivered much closer to the cylinder than a carburetor. Extensive research is necessary to gain a full understanding of fuel delivery capabilities for these types of applications. The overall goal of this project was to determine whether a single fuel injector should be located such that the spray pattern opposes or coincides with intake airflow in order to obtain better engine performance. Both methods were designed and constructed to be tested on a turbocharged single cylinder KTM 525 engine using a blend of 85% ethanol and 15% pump gasoline. Computer models were constructed prior to prototype development. Engine performance was tested and evaluated using the SuperFlow engine dynamometer. Using the parameters of horsepower output, intake temperature reduction, and stable air/fuel ratio to evaluate performance, it is predicted that the co-flow injector placement will be superior.

Recommended Citation

Mengelkoch, David and Bryce Tillman. "Formula SAE Fuel Injection Placement." Undergraduate Research Symposium, Mankato, MN, April 9, 2012.
http://cornerstone.lib.mnsu.edu/urs/2012/oral-session-09/4