MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202641079926 A) filed by Sona College Of Technology on June 29, 2026, for Three-Dimensional Thermo-Elastic Analysis And Structural Optimization Of A Solid Exhaust Valve For Internal Combustion Engines.
Inventors include Senthilkumar D; and Mahendran A.
The application for the patent was published on July 03, 2026, under issue no. 27/2026.
Abstract: ABSTRACT Generally inlet valves are larger than the exhaust valves, because speed of incoming air-fuel mixture is less than the velocity of exhaust gases which leave under pressure. Further, because of pressure, the density of exhaust gases is also comparatively high. Moreover, smaller exhaust valve is also preferred because of shorter path of heat flow in this case and consequent reduced thermal loading. Generally inlet valves and exhaust valves are 45% and 38% of the cylinder bore respectively. Further, to improve heat transfer to the cylinder head, the stem diameter of the exhaust valve is generally 10 to 15% greater than that of the inlet valve. Moreover, the valve lift in both inlet and exhaust valves should be at least equal to 25% of the valve head diameter which would provide the annular valve-opening area equal to the port throat area. If the valve lift is less, the volumetric efficiency of the engine will be decreased. On the other hand if it is excessive, the inertia of the valve actuating mechanism would be unduly large resulting in excessive noise and wear. In order to study the thermo elastic behavior of the valve, the literature related to the thermo elastic analysis of engine components has been studied. Since in the past most of the studies of automobile components are carried out for thermo elastic analysis by considering it as a case of two dimensional. The following section details the literature available and relevant to the proposed study of thermo elastic analysis of a solid exhaust valve, as a case of three dimensional.
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