As is well known, valves for internal combustion engines are opened and closed in a predetermined sequence to control the movement of gases to and from the cylinders with the speed of movement of the valves being proportional to engine speed. WATER POWER CONTROL VALVETypically, valves of this type are biased by a spring toward the closed position and are opened by engine driven cams.

A problem with this construction occurs at high engine speeds in that the valves tend to "float." Floating of a valve occurs when the energy of that valve is too great for its spring, in which event the cam and spring lose their control of that valve.Water Power Control Valves When this occurs, the valve may travel too far into the cylinder and be struck or completely crushed or "swallowed" by the piston in that cylinder. In either event, severe engine damage occurs.

The spring which urges the valve closed normally acts between a portion of the engine and a valve spring retainer carried by the valve stem.Water Control valves Typically, a valve spring retainer is releasably mounted on the valve stem by removable wedges. When valve float occurs, relative movement between the retainer and the valve stem may occur which may cause cocking of the wedges and possible demounting of the retainer from the valve stem. In this event the valve would be swallowed.

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2011-12-29

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