This paper describes ongoing development work on a new class of compressor valves. The significant feature of the new valve is that it opens promptly upon pressure reversal. This response differs markedly from conventional valves, which do not start to open until a substantial pressure difference (approximately ten percent of upstream pressure) is established. Improved adiabatic efficiency and reduced valve velocity at first contact with the lift stop were noted during the initial prototype tests of the new valve.

The current work is an attempt to gain a better understanding of the causes of these improvements. Specifically, the effects of valve spring pre-load and rate on the opening valve velocity and stop impact arc explored.

The results of a time domain study of valve opening are presented. Opening dynamics of both conventional plate valves and equivalent valves of the new design are investigated. The specific goals are to determine the effects of differing rates and pre-loads in the plate return springs.

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