TM-9-2815-205-34
ENGINE WITH CONTAINER; MODELS 5063-5299, 5063-5392, 5063-5393, 5063-5395, 5063-5398, 5063-539F, 5063-539L
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
AUGUST 1992
TM-9-2815-205-34 - Page 27 of 596
TM 9-2815-205-34
c. Compression.
As the piston continues the upward stroke, the exhaust valves close and the piston
compresses the charge of fresh air. The fuel injector injects the required amount of fuel into the cylinder
shortly before the piston reaches its highest point and continues into the power stroke.
d. Power.
The heat generated from compression ignites the fine fuel spray to start combustion. Com-
bustion continues until the injected fuel has all burned. The resulting pressure forces the piston down-
ward on its power stroke.
e. Exhaust.
When the piston is approximately halfway down, the exhaust valves open and most of the
high pressure exhaust gases escape. Shortly thereafter, the piston drops below the inlet ports in the
cylinder wall. Pressurized air is then forced through the cylinder. During this process, the remaining ex-
haust gases are removed (or scavenged) from the cylinder.
Change 1
1-15/(1-16 blank)
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