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 AIR INLET AND EXHAUST SYSTEM
SYSTEMS OPERATION
VALVE SYSTEM COMPONENTS
1. Rocker arm. 2. Bridge. 3. Rotocoil. 4. Valve
spring. 5. Push rod. 6. Lifter.
The camshafts have three cam lobes for each
cylinder. Two lobes operate the valves and one operates
the fuel injector.
As each camshaft turns the lobes on the
camshaft cause lifters (6) to go up and down. This
movement makes push rods (5) move the rocker arms
(1). Movement of the rocker arms makes the bridges (2)
move up and down on dowels in the cylinder head. The
bridges let one rocker arm open and close two valves
(intake or exhaust). There are two intake and two
exhaust valves for each cylinder.
Rotocoils (3) cause the valves to turn while the
engine is running. The rotation of the valves keeps the
deposit of carbon on the valves to a minimum and gives
the valves longer service life.
Valve springs (4) cause the valves to close when
the lifters move down.
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