Fuel Supply System - Etesia HYDRO 124D Technical Training Manual

FUEL SUPPLY SYSTEM.

NB : The rotational speed of the camshaft is half the rotational speed of the crankshaft, in other words of
the engine speed, as the camshaft works on a full engine cycle
( 1 engine cycle = 4 engine strokes = 2 crankshaft rotations).
Stroke
Piston movement
Crankshaft (per ½
rotation)
Crankshaft (per rotation) 1
Inlet valve
Outlet valve
Camshaft (per rotation)
- 12 -
Inlet Compression
Down Up
½ rotation 2/2 rotations
st
rotation
Open Closed
Closed
1 rotation
Explosion Exhaust
Down Up
3/2 rotations 4/2 rotations
2nd rotation
Open