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.
Summary of Contents for 1GM10
Page 1: ...YANMAR DIESEL INBOARD SHOP MANUAL ONE TWO 8 THREE CYLINDER ENGINES...
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Page 28: ...GENERAL INFORMATION 21 Bearing Blocks Press Shaft arm Bearing Spacer Press k 4 bed...
Page 36: ...30 CHAPTER TWO CHARGING SYSTEM TYPICAL Battery switch...
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Page 44: ...38 CHAPTER TWO LUBRICATION SYSTEM 2GM AND 2GM20 MODELS...
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Page 112: ...106 CHAPTER SIX...
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Page 145: ...FUEL INJECTION AND GOVERNOR SYSTEMS 139 FUEL INJECTION SYSTEM Fuel tank hose fuel pipe...
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Page 170: ...164 CHAPTER EIGHT CLOSED COOLING SYSTEM TYPICAL rnlxlng elbow Joint...
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Page 224: ...218 CHAPTER ELEVEN...
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