MAC TOOLS MW250 Betriebsanleitung PDF herunterladen (Seite 20)

100

101

TM 5-4310-452-14

1-12. GENERAL (Con't).

3. Fuel Tank Filler Cap 13. Automatic Blowdown Valve

4. Air Cleaner Assembly 14. Starter Motor and Solenoid

5. Restriction Indicator 15. Slave Receptacle

B. Exhaust Pipe 16. Alternator

7. 01 Cooler Fan 17. Storage Batteries

8. ON Filter Assembly 18. Minimum Pressure and Service Valve

9. Housing 19. Belt Break Switch

10. ON Separator 20. Fuel Tank

11. ON Temperature Bypass 21. Engine Cooing Blower

12. Muffler

1-13. ENGINE.

a. The engine for this unit is a Deutz, direct injection, air-cooled, four-stroke diesel.

b. The strokes of a four-cycle diesel engine are as follows:

(1) Intake Stroke. Air enters the cylinder through the air inlet valves and is drawn Into the cylinder by the

suction force created by the piston as it moves from a top position to a bottom dead center position.

(2) Compression Stroke. After the piston has passed bottom dead center, the air inlet valve closes. As the

piston moves upward, the air is compressed and reaches a temperature of 1000°F-1200°F (538° C-649°C). Shortly

before the piston reaches top dead center, fuel Injection into the cylinder is started.

(3) Power Stroke. The atomized fuel spray injected into the cylinder is immediately ignited by the high

temperature of the compressed hot air, and burning continues as the hot gases of combustion expand and force the

piston downward. Combustion proceeds until the end of fuel injection. Shortly before the piston reaches bottom dead

center, the exhaust valve opens.

TA505388

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