Road Machines Software Preview

Preview: 
    Engine
      Top End
      Cylinder head
      Throttle Body
      Valve Train
      Exhaust Manifold
      Cylinder Block
      Pistons
      Crankshaft

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Road Machines Features the following:

Detailed Info On:
- Modern Systems
- Parts
- Maintenance
- Troubleshooting

Featuring:
- Full Color Cutaways
- Interactive Graphics
- Easy to use CD-ROM

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General:
The engine's bottom end is where all the work is done. Expanding combustion gases apply pressure to the pistons, forcing them downward, which results in crankshaft rotation. The cylinder block is the main bottom end structure. Pistons (1) ride up and down in cylinder sleeves (2) that are fitted in the cylinder bores. The pistons are attached to the crankshaft (3) by connecting rods (4).

Block Design:
The design of the cylinder block varies among manufacturers. The block's geometry is determined by the number of cylinders (2), cylinder orientation (opposed, in-line, slant, V-shaped), and camshaft location (overhead cam or in-block cam). Regardless of design, the block must withstand the forces exerted by the pistons and crankshaft, serve as a mounting structure for other engine components, and be light in weight.

Main Caps:
The main caps (3) secure the crankshaft to the engine block. When bolted in place, they form the main bearing bore in which the crankshaft's main journals rotate. Two or four bolts are used to secure the caps. Some blocks use a main cap girdle which is a structure in which the caps rest. The caps and girdle are secured to the block.

Cylinder Sleeves:
Cylinder sleeves (1) or liners are removable, cylindrical inserts. Two types are used. The dry sleeve is separated from the water jacket (2) by the cylinder wall (3). The wet sleeve is in direct contact with the coolant and has thicker walls since no outside structure provides support. Sleeves are typically cast iron.

Dry Sleeves:
Dry sleeves are thinner in construction since structural support is provided by the engine block cylinder wall. The loads generated by combustion pressure are absorbed by the engine block and not the sleeve. Dry sleeves can be pressed into older engines to repair damaged cylinders.

Wet Sleeves:
Wet sleeves are designed to withstand the loads generated by combustion pressure. The sleeves are in direct contact with engine coolant. A rubber or copper O-ring (yellow circle) is used at the bottom flange to prevent coolant from leaking into the crankcase. The cylinder head gasket prevents any coolant leaking through the top.

The information on this page is provided from the "Road Machines" learning CD.  Buy it Today and continue your learning !