초록 ▼

An improved drive mechanism for rotary valves of the type used in internal combustion engines indexes the valves in selected attitudes of rotation to align the valve passage with an inlet or exhaust port and hold the valve in alignment for a selectable duration of crankshaft rotation. In like fashio

An improved drive mechanism for rotary valves of the type used in internal combustion engines indexes the valves in selected attitudes of rotation to align the valve passage with an inlet or exhaust port and hold the valve in alignment for a selectable duration of crankshaft rotation. In like fashion, the valves are also indexed to close off an inlet or exhaust port for a selected duration of crankshaft rotation. Flow into and out of an engine cylinder is improved because each valve is held for a longer period of time in a full open position. while compression and power strokes are made more efficient by the gas seal maintained while the valves are positioned to close off the intake and exhaust ports.

대표청구항 ▼

[ What is claimed is:] [1.] In an internal combustion engine of the type having a crankshaft rotatable by the operation of said engine, at least one engine cylinder, said cylinder having at least one inlet or exhaust port, said engine further having at least one rotary engine valve mounted to a valv

[ What is claimed is:] [1.] In an internal combustion engine of the type having a crankshaft rotatable by the operation of said engine, at least one engine cylinder, said cylinder having at least one inlet or exhaust port, said engine further having at least one rotary engine valve mounted to a valve shaft and having a valve passage formed therethrough, said valve shaft being rotatable to bring said valve passage into and out of alignment with said port, the improvement comprising:means for rotating said valve shaft,said rotation means including means to index said valve with said passage in a selected attitude of rotation with respect to said port,said indexing means including rotatable indexing gear means and cam driver means positioned in driving relation with said rotatable indexing gear means for interrupting the rotation of said valve in said selected attitude of rotation without interrupting the rotation of said crankshaft.