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Simplification of Air Assisted Direct Injection via Performance Benchmarking
Technical Paper
1999-01-3310
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Air assisted direct injection systems have been in commercial production for four years having established themselves as a technical breakthrough in the pursuit of low-emission two-strokes, whilst providing the end-user with smooth operation and a significant reduction to fuel consumption. The same core technology has demonstrated significant advantages for automotive direct injected four-stroke engines.
For the non-automotive sector, research has since aimed to provide manufacturers with alternate cost-function options, thus extending market penetration opportunities for low cost air assist DI.
By extensively benchmarking the air assisted direct injection system applied to customer marine products, Orbital engineers are developing significantly simplified systems which inherit the most performance-critical aspects of the existing production system, whilst eliminating some of the components required in today's production system.
This paper discusses the benchmarking process and the comparison of fuel system performance between simplified and existing production solutions. Also outlined is the process of function integration and component elimination used to realise a more favourable cost-function ratio.
Results from the application of simplified air assist systems to non-automotive engine designs are also presented.
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Authors
Citation
Coplin, N., "Simplification of Air Assisted Direct Injection via Performance Benchmarking," SAE Technical Paper 1999-01-3310, 1999, https://doi.org/10.4271/1999-01-3310.Also In
References
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- Bell G. et al “Exhaust Emissions Sensitivity with Direct Injection on a 50cc Scooter” SAE 970365
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- Smith D. et al “The Orbital Ultra Low Emissions and Fuel Economy Engine” 14 th Vienna Motorsymposium 1993 203 229
- Houston R. et al “Development of a Durable Emissions Control System for an Automotive Two-Stroke Engine” SAE 960361
- Houston R. Cathcart G. “Combustion and Emissions Characteristics of Orbital's Combustion Process Applied to Multi-cylinder Automotive Direct Injected 4-Stroke Engines” SAE 980153
- Fry M. et al “A comparison of Gasoline Direct Injection Systems and Discussion of Development Techniques” SAE 1999-01-0171
- Yoon K. et al “An Experimental Comparison Between Air-Assisted Injection System and High Pressure Injection System at 2-Stroke Engine” SAE 950270