This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Intake-Valve Temperature and the Factors Affecting It
Annotation ability available
Sector:
Language:
English
Abstract
Steady-state temperature measurements were made at two locations on the back surface of the intake valves of one of the cylinders of a Saturn 1.9-L DOHC engine. The temperature locations were such that in the upstream location the thermocouple is subjected to the impingement of the fuel spray during the injection process, whereas in the downstream location the thermocouple is out of the main fuel spray. The measured intake valve temperature at the upstream location was significantly lower than that at the downstream location, which was attributed to the spray cooling effect. The intake valve temperature was found to increase with increasing load, speed and coolant temperature. As the air-fuel ratio changes the valve temperature exhibits a maximum at near stoichiometric compositions, which is attributed to convective heat transfer from the backflow of combustion gases during the valve-overlap period. Intake valve temperature correlations were developed with excellent predictive capabilities. Coolant temperature was the single most important correlating variable of the intake valve temperature, followed by engine speed and air-fuel ratio.
Recommended Content
Authors
Topic
Citation
Alkidas, A., "Intake-Valve Temperature and the Factors Affecting It," SAE Technical Paper 971729, 1997, https://doi.org/10.4271/971729.Also In
References
- Quader, A. A. Sloane, T. M. Sinkevitch, R. M. Olson, K. L. “Why Gasoline 90% Distillation Temperature Affects Emissions with PFI and Premixed Charge,” SAE Paper 912430 1991
- Boam, D. J. et al. “The Sources of Unburnt Hydrocarbon Emissions from Spark Ignition Engines During Cold Starts and Warm-Up,” Combustion in Engines - Technology, Applications and the Environment , IMechE Paper C448/064 Mechanical Engineering Publications Ltd 57 72 1992
- Alkidas, A. C. Drews, R. J. “Effects of Mixture Preparation on HC Emissions of a S.I. Engine Operating Under Steady-State Cold Conditions,” SAE Paper 961958 1996
- Daneshgari, P. The Influence of Fuel on Inlet Valve Deposits in Petrol Engines,” EAEC Conference on New Developments in Powertrain and Chassis Engineering , Paper C382/109 61 67 Mechanical Engineering Publications Ltd 1989
- Daneshgari, P. Borgmann, K. Job, H. “The Influence of Temperature Upon Gasoline Deposit Build-Up on the Intake Valves,” SAE Paper 890215 1989
- Cheng, S-W, S. The Physical Parameters that Influence Deposit Formation on an Intake Valve,” SAE Paper 922257 1992
- Lepperhoff, G. Houben, M. “Mechanisms of Deposit Formation in Internal Combustion Engines and Heat Exchangers,” SAE Paper 931032 1993
- Worthen, R. P. Tunnecliffe, T. N. “Temperature Controlled Engine Valves,” SAE Paper 820501 1982
- Cherrie, J. M. “Factors Influencing Valve Temperatures in Passenger Car Engines,” SAE Paper 650484 1965
- Worthen, R. P. Rauen, D. G. “Measurement of valve Temperatures and Strain in a Firing Engine,” SAE Paper 860356 1986
- Todsen, Von U. Krentscher, B. “Ventilsitzringe mit hoher Warmeleitfahigkeit,” MTZ Motortechnische Zeitschrift 53 476 443 1992
- Imabeppu, S. Shimonosono, H. Hirano, Y. Fujigaya, K. Inoue, K. “Development of a Method for Predicting Heat Rejection to the Engine Coolant,” 1993 Vehicle Thermal Management Systems Conference Proceedings SAE Paper 931114 371 378 1993
- Martins, J. J. G. Finlay, I. C. “Fuel Preparation in Port-Injected Engines,” SAE Paper 920518 1992
- French, C: C. J. Atkins, K. A. ‘Thermal Loading of a Petrol Engine,’ Proc. Inst. Mech. Engrs (London) 187 561 573 1973
- Alkidas, A. C. ‘Thermal Loading of the Cylinder Head of a Spark-Ignition Engine,’ Heat Transfer Engineering 3 3-4 66 74 1982
- Taylor, C.F. T.-Y. ‘Heat Transfer in Internal-Combustion Engines,’ ASME Paper 57-HT-17 1957
- Taylor, C.F. The Internal-Combustion Engine in Theory and Practice 1 MIT Press Cambridge, Mass. 266 302 1978
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw-Hill Book Co. N.Y. 668 711 1988
- Shayler, P. J. May, S. A. Ma, T. ‘Heat Transfer to the Combustion Chamber Walls in Spark Ignition Engines,’ SAE Paper 950686 1986
- Cheng, C.-O. Cheng, W. K. Heywood, J. B. Maroteaux, D. Collings, N. “Intake Port Phenomena in a Spark-Ignition Engine at Part Load,” SAE Paper 912401 1991
- Shayler, P. J. Colechin, M. J. Scarisbrick, A. “Heat Transfer Measurements in the Intake Port of a Spark Ignition Engine,” SAE Paper 960273 1996
- Kapadia, D. A. Borman, G. L. “The Effect of Heat Transfer on the Steady Flow Through a Poppet Valve,” SAE Paper 670479 1967
- Annand, W. J. D. “Experiments on a Model Simulating Heat Transfer Between the Inlet Valve of a Reciprocating Engine and the Entering Stream,” Proc. Instn Mech Engrs 182 37 41 1967-68
- Engh, G. T. Chiang, C. “Correlation of Convective Heat Transfer for Steady Intake-Flow Through a Poppet Valve,” SAE Paper 700501 1970
- Annand, W. J. D. Lanary, R. S. “Heat Transfer Measurements on a Simple Model Representing a Poppet Exhaust Valve in an Outflowing Stream,” J. Mechanical Engineering Science 12 3 223 229 1970
- Martins, J. J. G. Finlay, I. C. “Heat Transfer to Air-Ethanol and Air-Methanol Sprays Rowing in Heated Ducts and Across Heated Intake Valves,” SAE Paper 900583 1990
- Grissom, W. M. Wierum, F. A. “Liquid Spray Cooling of a Heated. Surface,” Int. J. Heat Mass Transfer 24 261 271 1981
- Reilly, R. J. Andersen, R. P. Casparian, R. J. Dugdale, P. J. “Saturn DOHC and SOHC Four Cylinder Engines,” SAE Paper 910676 1991
- Alkidas, A. C. “Effects of Operational Parameters on Structural Temperatures and Coolant Heat Rejection of a S.I Engine,” 1993 Vehicle Thermal Management Systems Conference Proceedings (P-263) SAE Paper 931124 443 458 1993
- Ladommatos, N. “Mechanisms of Heat Transfer to Liquid Rims in the Manifold of Port-Injected Petrol Engines,” Proc Instn Mech Engrs 207 J. Automobile Engineering 211 222 1993