Re: Purpose of govenor????????

Posted by MarkB_MI on April 18, 2005 at 17:36:47 from (64.31.10.36):

In Reply to: Purpose of govenor???????? posted by SJ on April 18, 2005 at 04:54:49:

There are many types of governors. There are simple RPM limiters; Chevy trucks with gas engines used to have one that limited the engine to 4000 rpm.

Most farm and construction equipment have a "variable speed" governor. These do not try to hold the engine speed to a set rpm; rather they allow the engine to slow down a little under load.

Stationary engines, such as generator sets, are likely to have a "constant speed" governor. These try to hold the engine speed to a very precise rpm, regardless of the load.

Another interesting type of governor is the one used on propellor-driven aircraft. They have what is called a "constant speed" prop, and there's a separate control for the propellor speed. The pilot uses the throttle to adjust power (manifold pressure on a piston engine) and the propellor control to adjust rpm. The governor automatically adjusts the propellor pitch to maintain the selected rpm.

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