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Effects of High Pressure Injection and Oxidation Catalyst on Exhaust Odor in DI Diesel Engines
Technical Paper
2000-01-1936
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study investigated the effect of high pressure injection and an oxidation catalyst on the exhaust odor of DI diesel engines. At idling an injection pressure of 60∼80 MPa resulted in the minimum exhaust odor, with the least aldehyde and minimum total hydrocarbon (THC). This is because of decreases in fuel adhering to the combustion chamber walls due to the shortest ignition delay at this pressure range. However, above 60 MPa there is no further shortening of the ignition delay and overleaning of the local mixture dominates at injection pressures above 100 MPa, where the exhaust odor increases again. The odor reduction at the optimum injection pressure and injection timing is not significant, and further experiments with an oxidation catalyst were performed.
The oxidation catalyst was found less effective to reduce exhaust odor at long idling where the maximum catalyst temperature is only about 120°C. However a preconditioned catalyst reduces aldehydes, THC, and exhaust odor significantly just after starting due to good adsorption. The exhaust temperature at standard idling is low, and the activity of the catalyst was investigated after a hot exhaust condition. Above catalyst temperatures of 200°C, there were remarkable reductions in THC and aldehydes and there was almost no exhaust odor. Below 200°C the aldehydes in the exhaust increase sharply and objectionable exhaust odor appears.
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Roy, M., Tsunemoto, H., Ishitani, H., Akiyama, J. et al., "Effects of High Pressure Injection and Oxidation Catalyst on Exhaust Odor in DI Diesel Engines," SAE Technical Paper 2000-01-1936, 2000, https://doi.org/10.4271/2000-01-1936.Also In
References
- Ingram Colin. “Diesel Exhaust Odour of Small, High Speed, Direct Injection Engines,” SAE Paper No. 780114 1978
- Tanaka T. Kobashi K. Sami H. “Development of a Diesel Odor Measurement Method and it's Application to Odor Reduction,” SAE Paper No. 920726 1992
- Roy M. M. Tsunemoto H. Ishitani H. “Effects of Injection Timing and Fuel Properties on Exhaust Odor in DI Diesel Engines,” SAE International Spring Fuels & Lubricants Meeting & Exposition Michigan, USA May 3-6 1999 Paper No. 1999-01-1531
- Su T. F. Chang C. T. Reitz R. D. Farrell P. V. Pierpont A. D. Tow T. C. “Effects of Injection Pressure and Nozzle Geometry on Spray SMD and D. I. Emissions,” SAE Paper No. 952360 1995
- Renner G. Koyanagi K. Maly R. R. “Effect of Common Rail Injector Design on the Emission Characteristics of Passenger Car DI Diesel Engines,” Fourth International Symposium COMODIA 98 Kyoto, Japan July 20-23 1998 477 482
- Gulati S. T. Murtagh M. J. McLean R. O. “Ceramic Wall-Flow Filters and Oxidation Catalyst Supports for Diesel Exhaust Aftertreatment,” Proceedings of IPC-9 Bali, Indonesia November 16-21 1997 15 21
- Kiyota Y. Tsuji K. Kume S. Nakayama O. “Development of Diesel Particulate Trap Oxidizer System,” SAE Paper No. 860294 1986
- Horiuchi M. Saito K. Ichihara S. “The Effects of Flow-through Type Oxidation Catalysts on the Particulate Reduction of 1990s' Diesel Engines,” SAE Paper No. 900600 1990
- Owkita T. Shigeta Y. “Analysis Method of Low Concentration Gas and Bad smell,” KOUDANNSYA 1972 117 215
- Shiozaki T. Otani T. Joko I. Ohnishi T. “A Study of the White Smoke and the Odor of DI Diesel Engines in a Cold Weather Environment,” Proceedings of JSAE Paper No. 912247 1991 3.57 3.60
- Minami T. Yamaguchi I. Shintani M. Tsujimura K. Suzuki T. “Analysis of Fuel Spray Characteristics and Combustion Phenomena under High Pressure Fuel Injection,” SAE Paper No. 900438 1990