Fig. 3, Diagram D, shows that during the explosive stroke a further half-revolution of the fly-wheel is made.
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Fig. 3.—A complete Cycle
Fig. 3, Diagram E, shows that during the exhaust stroke a fourth half-revolution is made. So for every explosion there are two complete revolutions of the fly-wheel.
INDUCTION VALVES
In Fig. 1 it will be seen that the interior of the cylinder is separated from the induction pipe i p by an inlet valve marked i.
Fig. 4 (a) shows the induction valve in its place in the wall of the cylinder, and closed so that no mixture can pass.
Fig. 4 (b) shows a section of the induction valve when the valve is open leaving a free passage for the mixture in the direction of the arrows.
The spring above the valve is of such a strength that it keeps the valve closed, except when the power of suction is exerted, when it opens and the explosive mixture is admitted from the induction pipe through the aperture thus made.
