Abstract
NO x emissions released from diesel engines have much detrimental effects on the environment. Hence, these emissions must be decreased to the limited values described by regulations. One of the effective methods is to adopt Miller cycle to diesel engine in order to improve the performance and to reduce NO x emissions of a diesel engine. In this study, late inlet valve closing Miller cycle is applied to diesel engine by lowering compression ratio with respect to expansion ratio by closing intake valve 10 and 20 crank angles later than that of standard diesel engine by using zero-dimensional single zone model which was verified with experimental data. The obtained results have been compared with standard diesel engine in terms of performance and NO emissions. The results showed that Miller cycled diesel engine is found more efficient and environmentally friendly with less power output than standard diesel engine.
Similar content being viewed by others
Abbreviations
- A :
-
Heat transfer area (cm2)
- c p :
-
Constant pressure specific heat (J/g K)
- C :
-
Blowby coefficient
- B :
-
Bore (cm)
- F :
-
Fuel–air ratio
- h :
-
Specific enthalpy (J/g)
- h tr :
-
Heat transfer coefficient (W/m2/K)
- H u :
-
Lower heating value (J/g)
- Δh :
-
Combustion enthalpy of fuel (J)
- m :
-
Mass (g)
- \({\dot{m}}\) :
-
Time-dependent mass rate (g/s)
- M :
-
Molecular weight (g)
- n :
-
Injection constant
- p :
-
Pressure (bar)
- P :
-
Power (kW)
- N :
-
Revolution per minute
- Q :
-
Loss heat passed through the cylinder wall (J)
- \({\dot{Q}}\) :
-
Rate of heat transfer (W)
- RGF:
-
Residual gas fraction
- S :
-
Stroke (cm)
- \({\bar{S}_{\rm p}}\) :
-
Mean piston velocity (m/s)
- T :
-
Temperature (K)
- U :
-
Internal energy (J)
- v :
-
Specific volume (cm3/g)
- V :
-
Volume (cm3)
- W :
-
Work output (J)
- \({\dot{x}_{\rm i}}\) :
-
Fraction rate of the total injected fuel mass
- \({\dot{x}_{\rm b}}\) :
-
Fraction rate of the total burned fuel mass
- \({\varepsilon}\) :
-
Ratio of half stroke to rod length
- \({\phi}\) :
-
Equivalence ratio
- Γ (n):
-
Gama function depending on n
- θ :
-
Crank angle (\({\circ}\))
- τ :
-
Time (ms)
- ω :
-
Angular velocity (rad/s)
- η :
-
Thermal efficiency
- 1:
-
At the beginning of the compression
- a:
-
Air
- b:
-
Burning
- cyl:
-
Cylinder
- di:
-
Injection duration parameter
- db:
-
Burning duration parameter
- e:
-
Effective
- f:
-
Fuel
- fi:
-
Injected fuel
- fb:
-
Burned fuel
- I:
-
Injection, indicated
- id:
-
Ignition delay
- l:
-
Loss
- s:
-
Stroke
- si:
-
Start of fuel injection
- sb:
-
Start of burning
- st:
-
Stoichiometric
- tfmep:
-
Total friction mean effective pressure
- w:
-
Cylinder walls
References
Wang Y., Lin L., Roskilly A.P., Zeng S., Huang J., He Y., Huang X., Huang H., Wei H., Li S., Yang J.: An analytic study of applying Miller cycle to reduce NO x emission from petrol engine. Appl. Therm. Eng. 27, 1779–1789 (2007)
Wang Y., Lin L., Zeng S., Huang J., Roskilly A.P., He Y., Huang X., Li S.: An analytic study of applying Miller cycle to reduce NO x emission from petrol engine. Appl. Energy 85, 463–474 (2008)
Mikalsen R., Wang Y.D., Roskilly A.P.: A comparison of Miller and Otto cycle natural gas engines for small scale CHP applications. Appl. Energy 86, 922–927 (2009)
Lin J.C., Hou S.S.: Performance analysis of an air-standard Miller cycle with considerations of heat loss as a percentage of fuel’s energy, friction and variable specific heats of working fluid. Int. J. Therm. Sci. 47, 182–191 (2008)
Wu C., Puzinauskas P.V., Tsai J.S.: Performance analysis and optimization of a supercharged Miller cycle Otto engine. Appl. Therm. Eng. 23, 511–521 (2003)
Kesgin U.: Efficiency improvement and NO x emission reduction potentials of two-stage turbocharged Miller cycle for stationary natural gas engines. Int. J. Energy Res. 29, 189–216 (1995)
Wang Y., Zeng S., Huang J., He Y., Huang X., Lin L., Li S.: Experimental investigation of applying Miller cycle to reduce NO x emission from diesel engine. Proc. Inst. Mech. Eng. Part A J. Power Energy 219, 631–638 (2005)
Ge Y., Chen L., Sun F., Wu C.: Effects of heat transfer and friction on the performance of an irreversible air-standard Miller cycle. Int. Commun. Heat Mass Transf. 32, 1045–1056 (2005)
Ge Y., Chen L., Sun F., Wu C.: Reciprocating heat-engine cycles. Appl. Energy 81, 397–408 (2005)
Al-Sarkhi A., Jaber J.O., Probert S.D.: Efficiency of a Miller engine. Appl. Energy 83, 343–351 (2006)
Al-Sarkhi A., Al-Hinti I., Abu-Nada E., Akash B.: Performance evaluation of irreversible Miller engine under various specific heat models. Int. Commun. Heat Mass Transf. 34, 897–906 (2007)
Uzuneanu, K.; Panait, T.: Study of the thermodynamic efficiency of aMiller supercharged cycle. Termotehnica 1, 32–34 (2007). http://www.agir.ro/buletine/596.pdf
Zhao Y., Chen J.: Performance analysis of an irreversible Miller heat engine and its optimum criteria. Appl. Therm. Eng. 27, 2051–2058 (2007)
Gonca, G.; Kayadelen, H.K.; Safa, A.; Sahin, B.; Parlak, A.; Ust, Y.: Comparison of diesel engine and Miller cycled diesel engine by using two zone combustion model. 1. In: INTNAM Symposium, vol. 17, pp. 681–697 (2011)
Gonca, G.: Investigation of the effects of steam injection into the supercharged diesel engine with running Miller cycle on performance and emissions. PhD thesis progress report (2011)
Ferguson R.: Internal Combustion Engines-Applied Thermodynamic. Wiley, New York (1986)
Hohenberg, G.F.: Advanced approaches for heat transfer calculation. SAE Paper No. 790825 (1979)
Sitkei G.: Kraftstoffaufbereitung und Verbrennung bei Dieselmotoren. Springer, Berlin (1964)
Heywood J.B.: Internal Combustion Engines Fundamentals. McGraw Hill Book Company, New York (1989)
Olikara, C.; Borman, G.: A computer program for calculating properties of equilibrium combustion products with some applications to the engines. SAE Tech. Papers Series, 750468 (1975)
Ayhan, V.: Investigation of the effects of steam injection into the diesel engine on NO x and PM emissions (in Turkish). Sakarya University PhD thesis (2009)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Gonca, G., Sahin, B., Ust, Y. et al. A Study on Late Intake Valve Closing Miller Cycled Diesel Engine. Arab J Sci Eng 38, 383–393 (2013). https://doi.org/10.1007/s13369-012-0437-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13369-012-0437-5