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The Transient Performance during Acceleration in a Passenger Car Diesel Engine at the Lower Temperature Operation
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English
Abstract
Diesel passenger car is superior to gasoline engine car in the fuel economy, but it has some defects to improve :noise, startability, particulate and transient performance, etc.
Among these problems, this paper presents particularly transient performance in a diesel engine and clarifies the causes of its decline at lower temperature operation.
As the results, it is found that the transient torque at the early stage of acceleration is only 50% at −20°C, and that when coolant temperature went up to 20°C, the transient torque approaches to that of the warmed up engine.
The transient response becomes worse with retarding the injection timing and with decreasing the engine speed. On the other hand, since the normal response is not obtained despite of using high cetane number fuel, main cause of the inferior transient torque is not the poor combustion, but the increase of friction or cooling loss.
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Tsunemoto, H., Yamada, T., and Ishitani, H., "The Transient Performance during Acceleration in a Passenger Car Diesel Engine at the Lower Temperature Operation," SAE Technical Paper 850113, 1985, https://doi.org/10.4271/850113.Also In
References
- Hofbauer P. Sator K. “Advanced Automotive Power Systems” SAE paper 770113 1977
- Springer K. J. Baines T. M. “Emissions from Diesel Versions of Production Passenger Cars” SAE paper 770818 1977
- Dowdy M. Burke A. “Automotive Technology Projections” SAE paper 790021 1979
- Murayama T. Miyamoto N. et. al. “Combustion Behaviors under Accelerating Operation of and IDI Diesel Engine” SAE paper 800966 1980
- Honda Y. et. al. “Study on Evaluation Methods for Transient Engine Performance” Trans. of JSAE (in Japanese) 25 1982
- Karim G. A. Khanna S. “The Effect of Very Low Air Intake Temperature on the Performance and Exhaust Emission Characteristics of a Diesel Engine” SAE paper 740718 1974