At the bottom dead center (BDC), the piston moves back up, compressing the trapped fuel-air mixture in the cylinder with both intake and exhaust valves closed．
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举一反三
- The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
- bottom dead center (BDC)______
- At bottom dead center, the centerline of the connecting rod usually coincides with the（） A: angularity of the piston motion B: inertia moment from the piston C: centerline of the cylinder D: centerline of the king pi
- What is the purpose of the intake/exhaust valves in a diesel engine? （）
- As the plunger moves up， the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.
内容
- 0
The period when both inlet valves and exhaust valves are open is referred to as （）.
- 1
The two-stroke cycle begins with the piston coming up from the bottom of its stroke， with scavenge ports in the sides of the cylinder being （）.
- 2
In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）， there being an adequate overlap between the inlet opening and the exhaust closing.
- 3
Compressed air is supplied by air compression to （）. A: the air receivers B: the starting valves C: the cylinder covers D: the distributor
- 4
The piston moves up and down， thus causing the rotational movement of the（）