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Hino's Advanced Low-Emission Technologies Developed to Meet Stringent Emissions Standards
Technical Paper
2006-01-0275
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Japan's new 2005 long-term emissions regulation was implemented in October 2005. Both NOx and PM emissions standards were reduced to 2 g/kWh and 0.027 g/kWh, which were 40 and 85 percent lower than the 2003 new short-term emissions standards, respectively. These emissions standards are as stringent as the Euro5 standards that are scheduled for implementation in 2008. In addition, the transient-cycle test procedure for emissions compliance, labeled JE05, was introduced to replace the D13-mode steady-state test procedure.
This paper describes exhaust emissions reduction technologies developed for Hino's 13-liter heavy-duty diesel engine so that it meets the above standards. A production catalyzed wall-flow DPF was employed to reduce PM emissions in both mass and small particles. NOx emissions were reduced by improving combustion with cooled EGR and without use of a NOx aftertreatment device. A NOx reduction catalyst was deemed premature for application in an engine operating under typical vehicle driving conditions in Japan because the exhaust gas temperature was low (e.g., 120 ∼ 200°C).
An EGR valve and VG turbocharger, both with infinitely adjustable functions, were employed to significantly reduce both smoke and NOx emissions. Positions of both the EGR valve and the variable nozzles of the VG turbocharger were controlled by using the feedback information of intake charge air flow rate and intake charge pressure to maximize the EGR rate and reduce NOx emissions while keeping smoke low, especially under transient operating conditions.
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Kowada, M., Hayashi, K., Shoyama, K., Ihara, Y. et al., "Hino's Advanced Low-Emission Technologies Developed to Meet Stringent Emissions Standards," SAE Technical Paper 2006-01-0275, 2006, https://doi.org/10.4271/2006-01-0275.Also In
New Diesel Engines and Components and CI Engine Performance for Use with Alternative Fuels
Number: SP-2014; Published: 2006-04-03
Number: SP-2014; Published: 2006-04-03
References
- Sugihara H. et al. “Technologies to Reduce Exhaust Gas Emissions of Heavy Duty Diesel Engines” JSAE Symposium No. 20045619 2004
- Horiuchi H. et al. “The HINO E13C: Heavy-Duty Diesel Engine Developed for Extremely Low Emissions and Superior Fuel Economy,” SAE Paper No. 2004-01-1312 2004
- Torisaka H. et al. “DPR Developed for Extremely Low PM Emissions in Production Commercial Vehicles,” SAE Paper No. 2004-01-0824 2004
- Honma J. et al. “Development of a High-Performance EGR Cooler,” SAE Paper No. 2004-01-1446 2004