Novel Over-Expanded Six-Stroke Engine Mechanism

Abstract

Some of the exhaust waste heat of the four-stroke engines can be transformed into useful work in a variety of ways. With the exhaust heat recovery from the six-stroke engine mechanisms, the goal is to increase the thermal efficiency by converting the waste heat of useful work for the engine. Despite the availability of many patents related to six-stroke engines today more study and research are required to be used industrially. In this study, instead of a conventional six-stroke engine, a variable-stroke six-stroke engine mechanism was theoretically examined. An idealized thermodynamic model of the novel mechanism was constructed, kinetic and dynamic analyzes were made, and the design parameters were examined in comparison with the conventional engine mechanism. As a result, compared to the conventional six-stroke engine mechanism under the same conditions as this study, while the engine moment was increased by 10% , whereas the load on the crankshaft increased by only 1%.