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Development of J-Series Engine and Adoption of Common-Rail Fuel Injection System
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Abstract
Hino has developed new J-series medium-duty diesel engines for trucks and buses. The new J-series comprises four, five and six-cylinder engines with the same cylinder bore and stroke and with both naturally aspirated and charge air cooled. Both output and torque have been enhanced along with fuel efficiency in an engine that is lighter and more compact than ever and reaches new heights of durability and reliability.
J-series engine features a 4-valve system and OHC valve train design, which achieved an uniform combustion by a centered nozzle and combustion chamber design. This decreases the maximum combustion temperature and hence improved the NOx,smoke and PM emissions. And a reduced pumping loss results in improving the fuel consumption. J-series engines thus meet the Japanese 1994 emission regulations.
Another feature is a fully electronically controlled common-rail fuel injection system, which is equipped in a specified engine of naturally aspirated 6 cylinder. This enables engine idling noise and vibration to reduce as well as NOx emissions by means of optimally controlling fuel injection characteristics such as pilot injection according to the engine speed/load conditions.
J-series engine also has advantages of reliability, durability,noise reduction by adopting a new cooling gallery piston, newly designed turbocharger and so on.
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Endo, S., Adachi, Y., Ihara, Y., Terasawa, M. et al., "Development of J-Series Engine and Adoption of Common-Rail Fuel Injection System," SAE Technical Paper 970818, 1997, https://doi.org/10.4271/970818.Also In
References
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- Okada N. et al “Hino H Series Diesel Engine - Recent Progress in its Design and Application” SAE.Paper860475
- Endo S. et al. “Improvement of Performance for Truck Diesel Engine by Multi Valve System” SAE Paper 912463
- Endo S. et al. “State-of-the-Art; Hino High Boosted Diesel Engine” SAE Paper 931867
- Otani T. et al. “Effect of Fuel Injection Pressure and Fuel Properties on Particulate Emissions from H.D.D.I. Diesel Engine” SAE Paper 881255
- Shimoda M. et al. “Application of Heavy Duty Diesel Engine to Future Emission Standards” SAE Paper 910482
- Miyaki M. et al. “Development of New Electronically controlled Fuel Injection System ECD-U2 for Diesel Engines” SAE paper 910252
- Shundoh S. et al. “NOx Reduction from Diesel Combustion Using Pilot Injection with High lnjection Pressure Fuel Injection” SAE Paper 920461