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．
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.