Locomotive Diesel Engine EMD 645 Cylinder Head

EMD 645 Engine Cylinder Head

The EMD 645 cylinder head is a critical structural component designed for the EMD 645 series of large, two-stroke diesel engines. These engines are renowned for their durability and are primarily used in locomotive, marine, and stationary power applications.

The EMD 645 cylinder head is engineered to withstand the high temperatures and pressures of continuous heavy-duty operation, contributing significantly to the engine's legendary longevity and reliability.

Manufactured from a high-strength iron alloy, the cylinder head is a single, complex casting that seals the top of the engine's cylinder liner. Its key functions include:

• Housing Valves: It contains and guides the intake and exhaust valves, along with their respective valve seats and springs.

• Fuel Injection: It incorporates a precision-machined bore to hold the fuel injector, ensuring optimal spray pattern into the combustion chamber.

• Air Flow Management: The head forms the intake and exhaust ports, which are crucial for managing the scavenging airflow essential to the two-stroke cycle.

• Cooling: An internal passageway forms part of the engine's jacket water cooling system, circulating coolant to manage extreme operational temperatures and prevent thermal stress.

• Combustion Seal: A robust metal gasket is used between the head and the engine block to contain the high-pressure combustion gases.