Combustion System Development of a Two-Stroke, Spark-Assisted DI Diesel Engine 880169
A loop-scavenged, two-stroke, spark-assisted DI diesel engine was developed by modifying an outboard marine gasoline engine to operate on diesel fuel with high fuel efficiency similar to a diesel engine, yet retain the two-stroke engine advantages of low cost, light weight, and high power-to-weight ratio.
Engine modification was concentrated in the area of the combustion system, including transfer port design to generate air swirl in the cylinder, and combustion chamber design to generate air squish and turbulence. Bore and stroke (84 × 72 mm) remained the same as those of the base engine. The experimental engine used the production engine's piston, crankshaft, connecting rod, bearings, and cylinder block.
The transfer port design was optimized using a flow test bench for best swirl and air flow pattern with a simple flow visualization technique. The best combustion chamber geometry, compression ratio, and fuel injection spray pattern were determined through engine experiments.
Citation: Ariga, S. and Matsushita, Y., "Combustion System Development of a Two-Stroke, Spark-Assisted DI Diesel Engine," SAE Technical Paper 880169, 1988, https://doi.org/10.4271/880169. Download Citation
Author(s):
Susumu Ariga, Yukio Matsushita
Affiliated:
Southwest Research Institute San Antonio, TX, Sanshin Industires, Co., Ltd. Shizuoka, Japan
Pages: 15
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE Transactions Journal of Engines-V97-6
Related Topics:
Diesel / compression ignition engines
Combustion chambers
Connecting rods
Two stroke engines
Combustion and combustion processes
Diesel fuels
Fuel economy
Engine cylinders
Crankshafts
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
