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Reduction of Exhaust Emission with New Water Injection System in a Diesel Engine
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Abstract
In this study a new water injection system was applied to an 11 liter naturally aspirated DI diesel engine in order to reduce exhaust emissions. In this system, the water and fuel were arranged in the injection nozzle during the time between injections as fuel, water and then fuel. The fuel and water were then injected into the cylinder in that order. The tests were conducted at several engine operating conditions from the Japanese 13 mode test cycle to clarify effects of water injection on exhaust emissions and fuel consumption. The results showed that NOx reduction was directly proportional to the relative amount of water injection, regardless of engine speed and load. By using the optimal relative amount of water injection at each engine operating condition, total NOx and particulate matter (PM) in the Japanese 13 mode test cycle were reduced by 50% and 25%, respectively, without a fuel consumption penalty.
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Kohketsu, S., Mori, K., Sakai, K., and Nakagawa, H., "Reduction of Exhaust Emission with New Water Injection System in a Diesel Engine," SAE Technical Paper 960033, 1996, https://doi.org/10.4271/960033.Also In
References
- Tosa Y. Tateishi M. Nagae Y. “Stratified Fuel-Water Injection for Low-NOx Diesel Combustion (Part 1 Test Results on High-Speed Diesel Engine)” JSME papers 924 2 706 1992
- Tosa Y. Tateishi M. Nagae Y. Tayama K. “Stratified Fuel-Water Injection for Low-NOx Diesel Combustion” 10th Internal Combustion Engine Joint Symposium 46 1992