Figure 2-14.T-head engine.
valves are located in the engine block. The
intake valves in the head are actuated from the
camshaft through tappets, pushrods, and rocker
arms. The exhaust valves are actuated directly
by tappets on the camshaft.
T-HEAD (fig. 2-14)The intake and the
exhaust valves are located on opposite sides of
the cylinder in the engine block, each requires
their own camshaft.
(fig. 2-15)The camshaft is located in the
cylinder head. The intake and the exhaust valves
are both operated from a common camshaft. The
valve train may be arranged to operate directly
through the lifters, as shown in view A, or by
rocker arms, as shown in view B. This
configuration is becoming popular for passenger
car gasoline engines.
(fig. 2-16)When the double overhead
camshaft is used, the intake and the exhaust
valves each operate from separate camshafts
directly through the lifters. It provides excellent
engine performance and is used in more
expensive automotive applications.
Other than construction, what three things differ
in gasoline and diesel engines?
What type of cylinder arrangement is used when
height is a consideration?
Figure 2-15.Single overhead camshaft configurations.