This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Engine Valve Cooling
Annotation ability available
Sector:
Language:
English
Abstract
Design and manufacturing techniques have been developed which make possible drastic reduction and precise control of poppet valve temperatures. For example, exhaust valves of revised design have operated 500 to 700F (280 to 390C) cooler than solid valves of conventional design.
Direct benefits of temperature reductions of this magnitude could lead not only to increased valve and associated component durability, but also to reduced or eliminated hot-spot ignition.
Valve cooling demonstrably provides better sealing of the combustion chamber during valve-closed events. Alloy cost in valves can be reduced, and metallurgical sophistication directed to the manufacturing process as well as to end use.
Whether cooler valves can result in smoother combustion or permit higher compression ratios with unleaded fuels cannot as yet be determined in contemporary cylinder heads. Modifications would be required to permit more uniform and adequate coolant velocity around some valve guides which currently cannot manage stem heat rejection from super-conductive valves.
Recommended Content
Authors
Topic
Citation
Danis, L., "Engine Valve Cooling," SAE Technical Paper 730055, 1973, https://doi.org/10.4271/730055.Also In
References
- Taylor C. Fayette The Internal Combustion Engine in Theory and Practice I II MIT Press 1968
- May 22 1928
- Obert E. F. Internal Combustion Engines International Textbook Company 1970
- Craver Robert J. Podick R. S. Miller R. D. Spark Plug Design Factors and Their Effect on Engine Performance SAE Paper 700081 January 1970
- Danis Louis J. Some Significant Properties of Exhaust Valve Materials Eaton Forum February 1953
- Guibet J. C. Duval A. New Aspects of Preignition in European Automotive Engines SAE Paper 720114 January 1972
- Nagel William S. Analog Study of Valve Heat Flow , Eaton Forum February 1961
- Stotter A. Woolley K. S. Ip E. S. Exhaust haust Valve Temperature - A Theoretical and Experimental Investigation SAE Paper 969A January 11-15 1965
- Cherrie J. M. Factors Influencing Valve Temperatures in Passenger Car Engines SAE Paper 650484 May 17-21 1965
- Cerruti C. U. Pinolini F. Application of the Method of Electro-Thermal Analogy to the Study of the Stationary Temperature Field in an Engine Exhaust Valve S.I.A.S. 26 10 1953 291 301
- Manganiello Eugene J. Bogart Donald Piston Heat-Transfer Coefficients Across an Oil Film in a Smooth-Walled Piston Reciprocating-Sleeve Apparatus
- Zipkin M. A. Sanders J. C. Relation of Exhaust Valve Temperatures with Engine Operating Conditions and Valve Design in an Air-Cooled Cylinder NACA Report No. 813 October 1945
- Kreith F. Principles of Heat Transfer International Textbook Company 1965
- Brown D. H. Diesel Cylinder Heat Transfer Criteria SAE Transactions 66 523 529
- Cichelli M. T. Bonilla C. F. Heat Transfer to Liquids Boiling Under Pressure Trans. A. I. Ch. E. 41 1945 755 787
- Danis L. J. Recent Enging Valve Technology SAE Paper 500B March 12-16 1962
- Howarth M. H. Design of High Speed Diesel Engines American Elsevier Publ. Co., Inc. 1966
- Overbye V. Bennethum J. Uyehara O. Myers P. Unsteady Heat Transfer in Engines 461 SAE Trans. 1961
- McAdams W. H. Heat Transmission 1954 The Maple Press Co. 12 14
- Streeter R. Lichty L. Internal Combustion Engines 140 141 McGraw-Hill 1929 3rd
- Gibson A. H. Baker H. W. Exhaust Valve and Cylinder Heat Temperatures in High Speed Petrol Engines Inst. of Mech. Engrs. Dec. 14 1923
- A. W. Judge The Testing of High Speed Internal Combustion Engines Van Nostrand 1932
- Hunter M. C. T. Rotary Valve Engines Hutchinson's Technical 1946
- Heron S. D. Felt A. E. Cylinder Peformance, Compression Ratio, and Mechanical Octane Number Effects SAE Trans. 1950 4 455 499
- Winch R. F. The Occurrence of Preignition in Present Day Cars in Normal Service SAE Summer Meeting June 7-12 1953
- Warren J. Combustion Chamber Deposits and Octane-Number Requirement SAE Meeting Detroit Jan. 11-15 1954
- Caris D. F. Mitchell B. J. McDuffie A. D. Wyczalek F. A. Mechanical Octanes for Higher Efficiency SAE Summer Meeting June 12-17 1955
- Appeldoorn J. K. Fuel Quality Requirements of High Compression Ratio Engines A. P. I. Lubrication Committee Feb. 28 1956
- Anderson J. Preignition in Aircraft Reciprocating Engines SAE Annual Meeting Jan. 9-13 1956
- Smith J. M. Smith R. M. Aluminum Engines - Design for Modern Fabrication SAE Trans. 67 1959 335 343
- Pless Loren G. Lube Oil Effects on Surface Ignition - A Sleeping Giant SAE 776 C Oct. 30-31 1963
- Becker J. O. Hull W. L. The Mechanism of Surface Ignition in Internal Combustion Engines SAE Paper 650022
- Myers P. S. Uyehara O. A. Fuel-Engine Research in Universities SAE SP-340 1967 Horning Memorial Lecture
- Godfrey D. Courtney R. L. Investigation of The Mechanism of Exhaust Valve Seat Wear in Engines Run on Unleaded Gasoline SAE Paper 710356
- Giles W. Valve Problems with Lead Free Gasoline SAE Paper 710368