Question
Download Solution PDFThe cylinder head is made of which of the following?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Cylinder head:
- The cylinder head is made of a single casting.
- It is bolted on the top of the cylinder block.
- The cylinder head is made of aluminum alloy and cast iron.
- It has passages for oil and water circulation.
- It accommodates valves, sparks plugs/ injectors (in the case of diesel engines), and heater plugs.
- A combustion chamber is also provided in some cylinder heads.
- In the case of the overhead valve system, the cylinder head supports the rocker shaft assembly.
- The lower surface of the cylinder head is machined to the specified accuracy and a gasket is used in between the cylinder head and cylinder block to avoid leakage.
- The head also provided spaces for the passages that feed air, and water fuel to the cylinder and allow the exhaust to escape.
- The following materials are used in the cylinder head gasket:
- Copper-asbestos gasket
- Steel - asbestos - copper gasket
- Steel - asbestos gasket
- Single steel ridged gasket
- Cylinder head gaskets are the most critical seal in an engine between the cylinder head and the engine block deck.
- The head gasket must seal the combustion pressures up to 1,000 psi (689.5 kPa) in gasoline engines and 2,700 psi (1,862 kPa) in turbocharged diesel engines.
- In addition, the head gasket must withstand combustion temperatures that are in excess of 2,000°F (1,100°C).
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