TWO-CYCLE PRINCIPLE - Continued
Figure 1. Two-Cycle Sequence.
In the scavenging process employed by the 8V92TA engine, a charge of air is forced into the cylinders by the
blower and thoroughly sweeps out all of the burned gases through the exhaust valve ports. This air also helps to
cool the internal engine parts, particularly the exhaust valves, at the beginning of the compression stroke.
Therefore, each cylinder is filled with fresh, clean air which provides for efficient combustion. The air, entering the
blower from the air cleaner, is picked up by the blower rotor lobes and carried to the discharge side of the blower,
as indicated by the arrows. The continuous discharge of fresh air from the blower enters the air chamber of the
cylinder block and sweeps through the intake ports of the cylinder liners. The angle of the ports in the cylinder
liners creates a uniform swirling motion to the intake air as it enters the cylinders. This motion persists throughout
the compression stroke and facilitates scavenging and combustion.
There are two dry-type cone shaped air filters mounted to the air inlet side of each turbocharger. The dry-type air
cleaners are designed to provide highly efficient air filtration under all operating conditions. The air cleaners have
a replaceable impregnated paper filter element that can be cleaned.