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.
B
举一反三
- 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
- 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．
- The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
- 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 （）.
- Piston cooling fins are located ______. A: at top the piston crown B: beneath the piston crown C: at the base of the piston skirt D: inside the cylinder liner<br/>cooling water jacket
内容
- 0
bottom dead center (BDC)______
- 1
The position of the piston parts in relation to each other is secured by means of （） in the crown.
- 2
For a diesel engine， when the piston is at the （）， the clearance volume is the largest.
- 3
The piston’s function is to act as a moveable plug in the cylinder, forming the bottom part of the combustion chamber.
- 4
The position of the piston parts in relation to each other is secured by means of （） and a dowel pin in the crown.