Cummins Engine Overhauling and testing
2025-07-17
Cummins engines operate on the four-stroke diesel cycle, which consists of four key stages:
1. Intake Stroke: The piston moves downward, opening the intake valve. Air, filtered through the air cleaner, is drawn into the cylinder. This stage ensures a sufficient supply of oxygen for combustion.
2. Compression Stroke: Both valves close as the piston moves upward, compressing the air. This compression raises the air temperature significantly (often exceeding 500°C), creating the high-temperature environment needed for diesel combustion.
3. Power Stroke: When the piston nears the top of the compression stroke, fuel is injected into the cylinder at high pressure through the fuel injector. The hot compressed air ignites the fuel instantly, causing a rapid expansion of gases. This expansion pushes the piston downward, driving the crankshaft to generate mechanical power.
4. Exhaust Stroke: As the piston moves upward again, the exhaust valve opens. The burned gases (exhaust) are pushed out of the cylinder and expelled through the exhaust system. This clears the cylinder for the next cycle. This cycle repeats continuously, converting the chemical energy in diesel fuel into mechanical energy to power various equipment, from trucks to generators. Cummins engines are known for optimizing this process to achieve high efficiency, durability, and low emissions.
As a world-renowned brand of diesel engines, the overhaul process of Cummins engines must strictly follow the original factory technical specifications to ensure that the performance after maintenance is restored to the design standards.
