Browse > Article

A Study on the Effect of Exhaust System Configuration on Scavenging Characteristic of a Four-Cylinder Turbocharged Diesel Engine  

Jeong, Soo-Jin (Korea Automotive Technology Institute)
Chung, Jae-Woo (Korea Automotive Technology Institute)
Kang, Woo (Korea Automotive Technology Institute)
Kim, Woo-Seung (Department of Mechanical Engineering, Hanyang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.3, 2006 , pp. 35-43 More about this Journal
Abstract
A four-stroke four-cylinder turbocharged diesel engine can be fitted with various types exhaust system. In this paper, the impacts of exhaust system design on scavenging performance and wave action characteristic during valve overlap are investigated by using one-dimensional gas dynamic code. This work shows that a huge reflected exhaust pressure waves which reaches the exhaust port during valve overlap period is crucial design factor which determines quality and quantity of the fresh charge. Hence pressure wave that reaches the exhaust port of the cylinder during the valve overlap sequence should be weakened for good scavenging performance. This paper describes advantages and disadvantages of the various exhaust systems applied to a turbocharged and intercooled 4-cylinder diesel engine system in terms of scavenging efficiency and engine performance. To verify the computational results, experimental comparison has also performed.
Keywords
Turcocharged engine; Scavenging efficiency; Wave action; Exhaust system design; Reflected wave;
Citations & Related Records
연도 인용수 순위
  • Reference
1 F. Trence, F. Bizjan and A. Hribernik, 'Influence of the Exhaust System Design on Scavenging Characteristic and Emissions of a Four-Cylinder Supercharged Engine,' Transactions of ASME, Vol.122, pp.556-561, 2000
2 R. S. Benson, 'The Thermodynamics and Gas Dynamics of Internal-Combustion Engines,' Volume I, Oxford University Press, Oxford, 1982
3 F. Payri, J. Benajes and M. Meyes, 'Modelling of Supercharger Turbines in Internal Combustion Engines,' Int. J. Mech. Sci., Vol.38, Nos.8-9, pp.853-869, 1996   DOI   ScienceOn
4 H. O. Hardenberg and F. W. Hase, 'An Empirical Formula for Computing the Pressure Rise Delay of a Fuel from its Cetane Number and from the Relevant Parameters of Direct Injection Diesel Engines,' SAE 790493, 1979
5 F. Trence, F. Bizjan and A. Hribernik, 'Influence of the Exhaust System on Performance of a 4-Cylinder Supercharged Engine,' Journal of Engineering for Gas Turbines and Power, Vol.120, pp.855-860, 1998   DOI
6 Boost Users' Guide Ver. 4.0.4, AVL, 2004
7 K. O. Cha, J. S. Lee and H. S. Kim, 'A Study on the Characteristics of Pressure Wave Propagation in Automotive Exhaust System,' Transactions of KSAE, Vol.4, No.4, pp.18-26, 1996
8 S.-J. Jeong, T. H. Kim, B. S. Kim and J. H. Cho, 'A Study on the Effect of Exhaust Manifold Configuration on Engine Performance in a 4 Cylinder, 4 cycle Gasoline Engine,' Transactions of KSME, Vol.18, No.3, pp.751-767, 1994
9 G. Woschni, 'A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,' SAE 670931, 1967