Harmsworth, Alfred Charles William, Sir, bart · London Bombay : Longmans, Green, and Co. · leaf 168
SPARK This is a simple method of governing that is now practicallyconfined to the control of motor cycles and small cars only.To understand its working it is but necessary to rememberthat if the full force of the explosion occurs in the combustionchamber at the moment when the piston is at the… … Fig- 18.—Exhaust Valve Regulator the charge be delayed it will affect—according to the measureof the expansion the charge has already undergone—thepotency of the explosion. This is obtained by varying thefiring period by means of a suitable device which is so arrangedthat the automatically…
Automobiles
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