Main engine cylinder head removed

Описание: Main engine cylinder head removed

A main engine cylinder head is a component that sits atop the engine block, sealing the cylinders to form the combustion chamber. It houses critical parts like intake and exhaust valves, spark plugs or injectors, and cooling and oil passages. The cylinder head is vital for the engine's function as it controls the flow of air, fuel, and exhaust, and withstands the high pressure and temperature of combustion.

Functions of the cylinder head

Forms the combustion chamber: It provides the top seal for the combustion chamber, working with the piston and cylinder wall.

Houses engine valves: It contains the intake and exhaust valves, along with their associated springs and other valvetrain components like rocker arms and camshafts (in an overhead cam setup).

Manages airflow and fuel: It contains the ports for the intake of the air-fuel mixture and the exhaust of burnt gases. It also houses fuel injectors or spark plugs.

Provides for cooling and lubrication: Modern heads often include passages for coolant to flow through to help dissipate heat and channels for oil.

Contains other essential components: Depending on the engine type, it can also include components like starting air valves, indicator valves, and safety valves for pressure release.


Key characteristics

Material: Typically made from cast iron for durability or aluminum alloys for lighter weight.

Structure: It's a solid metal component that is bolted to the engine block with a head gasket in between to ensure a tight seal.

Complexity: It is a complex and precisely engineered part, often with multiple internal passages and components, making it one of the most complex parts of an engine.

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