This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An improvement Of Pumping Loss Of High Boosted Diesel Engines
Annotation ability available
Sector:
Event:
22nd FISITA Congress
Language:
English
Abstract
In heavy duty vehicles, a higher boost and/or smaller sized diesel engine is quite effective in achieving fuel economy. However, this causes an increase of pumping loss due to increased intake air and exhaust gas flow of the engine at high load and high speed conditions. It also causes a relatively poorer torque at low speed conditions due to a lack of boosted air. The authors investigated the pumping loss and volumetric efficiency of a high boosted turbocharged diesel engine and analyzed the effects of the turbocharger, inertia charging and the valve opening areas. An optimization of small geometry turbine housing was obtained for the improvement of both low speed torque and fuel economy. The effects of inertia charging were ascertained from the relation between engine valve timing and the amplitude and phase of intake air pulsation. Increasing the intake and exhaust valve opening area improved fuel consumption by reducing pumping loss. The combination with the best selection of a turbocharger, the control of the inertia charging system and the increased valve opening area achieved higher low speed torque and better fuel economy.
Recommended Content
Authors
Topic
Citation
Endo, S., Otani, T., and Kakinai, A., "An improvement Of Pumping Loss Of High Boosted Diesel Engines," SAE Technical Paper 885102, 1988, https://doi.org/10.4271/885102.Also In
References
- Suzuki T. Joko I. Kakegawa T. “Development of Hino Turbocharged Diesel Engine” SAE Paper 840015
- Sato A. Suenaga K. Noda M. Maeda Y. “Advanced Boost-up in Hino EP100-II Turbocharged and Charge-Cooled Diesel Engine” SAE Paper 870298
- Watson N. “Resonant Intake and Variable Geometry Turbocharging System for a V8 Diesel Engine” Proc. I.Mech.E., Turbocharging and Turbochargers 1982 101
- Tasaka H. Matsuoka S. “Predictions of Combustion, Fuel Economy and Emission Characteristics Influenced by the Gas Exchange Process of S.I. Engines,” SAE Paper 810821
- Asmus T.W. “Valve Events and Engine Operation” SAE Paper 820749