Yanmar 1GM10, Руководство по ремонту

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SINGLE-CYLINDER ENGINES 69
4-STROKE DIESEL ENGINE PRINCIPLES
As the piston travels downward, the exhaust When the crankshaft continues to rotate, the
valve closes and the intake valve opens, piston moves upward, compressing the air.
allowing air to be drawn into the cylinder. When
the piston reaches the bottom of its travel
(BDC),
the intake valve closes and remains
closed for the next 1 revolutions of the
crankshaft.
Exhaust valve
As the piston almost reaches the top of its When the piston almost reaches BDC, the
travel, the injector sprays fuel into the exhaust valve opens and remains open until the
combustion chamber. The fuel is ignited by the piston is near TDC. The upward travel of the
heat of compression. The piston continues to piston forces the exhaust gases out of the
top dead center (TDC) and is pushed downward cylinder. After the piston has reached TDC, the
by the expanding gases. exhaust valve closes and the cycle repeats.