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Diesel Engine Cylinder Head Port Design for Armored Fighting Vehicles: Compromise and Design Features

  • Hari ViswanathEmail author
  • A. Kumarasamy
  • P. Sivakumar
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The cylinder head of diesel engines for armored fighting vehicles (AFVs) should be compact and lightweight and has to operate under severe loading conditions. The cylinder head of a direct-injection (DI) diesel engine has to admit charge to the cylinder and expel the exhaust gas with minimum pumping losses, with required swirl and other properties of charge motion. It must also provide features like mounting of injector, sealing of combustion gases, and maintaining acceptable temperature of the components. The cylinder head is therefore a critical and a complex component in AFV diesel engines. This paper discusses the layout options of intake port and design features that can be applied to the cylinder head of four-stoke direct-injection diesel engines for AFVs. The head layouts followed here can provide more opportunities in positioning of ports and enhance other attributes of the design. The optimized configuration results in improved swirl characteristics, reduced volume and weight along with better cooling with the intake port-generating swirl in two modes, i.e., the directed mode and the helical mode.

Keywords

Helical intake port Swirl number Paddle wheel test rig 

Abbreviations

a

Sonic velocity at inlet manifold conditions (m/s)

A

Area of valve inner seat (m2)

B

Cylinder bore (mm)

CD

Discharge coefficient

CF

Flow coefficient

CFD

Computational fluid dynamics

D

Valve inner seat diameter (mm)

L

Valve lift (mm)

MFC

Mean flow coefficient

MRSR

Mean rig swirl ratio

NR

Non-dimensional rig swirl

Q

Volume flow at port entry conditions (m3/s)

S

Engine stroke (mm)

Vo

Velocity (m/s)

WC

Charge swirl speed at IVC (rpm)

WE

Engine crank shaft speed (rpm)

WR

Swirl meter vane speed (rpm)

Z

Gulp factor

α1

Crank angle, IVC (degree CA)

α2

Crank angle, IVC (degree CA)

∂p

Total pressure drop over port

ρ

Air density (kg/m3)

References

  1. 1.
    Godrie, P., Zellat, M.: Simulation of Flow Field Generated by Intake Port-Valve Cylinder Configuration-Comparisons With Measurements and Applications. SAE-940521 (1994)Google Scholar
  2. 2.
    Gale, N.F.: Diesel Engine Cylinder Head Design: The Compromises and the Techniques. SAE-900133 (1990)Google Scholar
  3. 3.
    Brandl, F., Reverencic, I., Cartellier, W., Den, J.C.: Turbulent Air Flow in The Combustion Bowl of a D.I. Diesel Engine & its Effect on Engine Performance. SAE-79004C (1979)Google Scholar
  4. 4.
    Brignall, A., Jin, Z.M.: Investigation of inlet port design on engine swirl using orthogonal array experimentation and computational fluid dynamics. In: ImechE Conference on Fluid Mechanics and Dynamics of Multi-valve Engines, London (1999)Google Scholar
  5. 5.
    Lilly, L.C.R.: Diesel Engine Reference Book. Butterworth-Heinemann Publications, Oxford, United Kingdom (1984)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.CVRDE, Defence Research & Development OrganisationChennaiIndia

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