Question
Download Solution PDFThe inlet valve is made up of which of the following?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Valves of Engine:
Functions of valves:
- To open and close the inlet and exhaust passages of the cylinder.
- To dissipate heat, through its seat to the cylinder head.
Valve Materials:
- Inlet valve: Nickel-chromium steel alloy with satellite facing
- Exhaust valve: Silicon-chrome alloy steel sodium-filled valves
Construction of a valve:
- The head (1) of the valve is ground with a margin (2) to provide strength.
- The valve face (3) is ground to a 30° or 45° angle which matches with the seat angle to avoid leakage.
- The valve stem (4) is of round shape.
- The length of the stem varies from engine to engine.
- At the end of the stem, a groove (5) is provided to hold the spring lock. In some heavy-duty engines, the valves are hollow, and sodium is filled inside, which helps in the quick cooling of the valve.
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