The top 10 major components on a diesel engine.

A diesel engine used in heavy-duty commercial applications consists of several major components that work together to generate power and drive the vehicle. The key components of a diesel engine typically include:

1. Cylinder Block: The cylinder block forms the foundation of the engine and houses the cylinders where combustion occurs. It provides structural support and contains various passages for coolant and lubricating oil.

2. Cylinder Head: The cylinder head sits on top of the cylinder block and houses the intake and exhaust valves, fuel injectors, and the combustion chamber. It seals the top of the cylinders and facilitates airflow into and out of the engine.

3. Pistons and Connecting Rods: Pistons move up and down within the cylinders, driven by the force of combustion. The connecting rods connect the pistons to the crankshaft, converting the reciprocating motion of the pistons into rotary motion.

4. Crankshaft: The crankshaft is a large, heavy-duty shaft that converts the reciprocating motion of the pistons into rotational motion. It transfers power to the transmission and other drivetrain components.

5. Camshaft: The camshaft controls the opening and closing of the intake and exhaust valves. It is driven by the crankshaft and has lobes that actuate the valve train.

6. Fuel System: The fuel system includes components such as the fuel tank, fuel pump, fuel injectors, and fuel filters. It delivers fuel to the combustion chambers at the right pressure and timing for efficient combustion.

7. Air Intake System: The air intake system consists of the air filter, turbocharger or supercharger (if equipped), and intercooler. It delivers clean, filtered air to the combustion chambers, enhancing combustion efficiency and power output.

8. Cooling System: The cooling system includes components such as the radiator, coolant pump, hoses, and thermostat. It circulates coolant to absorb heat from the engine and maintain optimal operating temperatures.

9. Lubrication System: The lubrication system provides oil to various engine components, such as bearings, pistons, and camshafts, to reduce friction and prevent wear. It includes an oil pump, oil filter, and oil passages.

10. Exhaust System: The exhaust system guides the combustion byproducts out of the engine. It includes components such as the exhaust manifold, catalytic converter (if applicable), diesel particulate filter (DPF), and muffler.

These are the fundamental components of a diesel engine used in heavy-duty commercial applications. However, different engine designs and manufacturers may have variations in specific components and configurations.