Functional efficiency testing method of a device for adjusting stroke of gas-exchange valves of externally-ignited combustion engine, involves adjusting stroke of gas-exchange valves and evaluating changing of crankshaft acceleration

摘要

The method involves adjusting the stroke of the gas-exchange valves or altering the ignition timing, and subsequently evaluating the changing of crankshaft acceleration. The exceeding of crankshaft acceleration over a threshold value is directly determined from crankshaft speed (A), captured after adjusting the stoke of the gas-exchange valve.