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
A: angularity of the piston motion
B: inertia moment from the piston
C: centerline of the cylinder
D: centerline of the king pi
C
举一反三
- 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 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.
- The small end of the connecting rod is attached to the piston with a （）.
- Aboard a ship，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.
- Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
内容
- 0
For one or two types of engine， the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.
- 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
Block group contains______. A: connecting rods,crankshaft and flywheel B: pistons,connecting rods and oil pan C: cylinder block,cylinder head and oil pan D: piston rings,gasket and connecting rods
- 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 lower end of each piston rod is reduced in diameter to fit a bore in （）， this being secured to the piston rod by a nut.