Lesson 1/Learning Event 1
FIGURE 32. VALVES AND OPERATING MECHANISM.
Valves and Operating Mechanism
Every cylinder of a four-stroke-cycle engine has intake and exhaust valves. The intake ports from the intake
valves are usually connected to one common pipe called a manifold. The manifold then leads to a mixing
point that supplies the fuel-air mixture. Likewise, the ports leading away from the exhaust valves are connected
to a common manifold for carrying exhaust gases away from the engine. V-type engines generally have two
exhaust manifolds, one for each row of cylinders.