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Introduction to The Basic Structure of Cummins Diesel Generator

Dec. 02, 2021

Today we will give you a brief introduction to the basic structure of Cummins diesel generators. If any else you need to know, welcome to visit our Starlight website. Next, we will introduce the relevant content for you.

The basic structure of a diesel engine: consists of cylinders, pistons, cylinder heads, intake valves, exhaust valves, piston pins, connecting rods, crankshafts, bearings and flywheels. The diesel engine of Cummins diesel generator is generally a single-cylinder or multi-cylinder four-stroke diesel engine. Below I will only talk about the basic working principle of a single-cylinder four-stroke diesel engine: the start of a diesel engine is to turn the crankshaft of the diesel engine by manpower or other power to make the piston seal at the top. The cylinder reciprocates up and down. The piston completes four strokes in motion: intake stroke, compression stroke, combustion and power (expansion) stroke, and exhaust stroke. When the piston moves from top to bottom, the intake valve opens, and the fresh air filtered by the air filter enters the cylinder to complete the intake stroke. The piston moves from bottom to top, the intake and exhaust valves are closed, the air is compressed, the temperature and pressure are increased, and the compression process is completed. When the piston is about to reach its peak, the fuel injector sprays the filtered fuel into the combustion chamber as a mist and mixes it with high-temperature and high-pressure air. Work stroke. After the work stroke is completed, the piston moves from bottom to top, the exhaust valve opens to exhaust, and the exhaust stroke is completed. The crankshaft rotates half a turn per stroke. After several working cycles, the diesel engine gradually accelerates into work under the inertia of the flywheel.


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The rotation of the crankshaft of the diesel engine drives the generator to rotate and generate electricity. The generators include a DC generator and an AC generator. The DC generator is mainly composed of a generator shell, a magnetic pole core, a magnetic field coil, an armature, and carbon brushes. Working principle of power generation: When the diesel engine drives the generator armature to rotate, the armature coil cuts the magnetic lines of force in the magnetic field due to the remanence of the generator’s magnetic pole core. According to the principle of electromagnetic induction, the current is generated by magnetic induction and output through the carbon brush.


The alternator is mainly composed of a number of permanent magnets (called a rotor) with alternating north and south poles made of magnetic materials and an armature coil (called a stator) made of silicon cast iron and wound with multiple sets of serial coils. Working principle of power generation: The rotor is driven by the diesel engine to cut the magnetic lines of force in the axial direction. The alternating magnetic poles in the stator form an alternating magnetic field in the coil core. The rotor rotates once, and the direction and size of the magnetic flux are changed many times. Due to the changing effect of the magnetic field, In the coil, an induced current of varying size and direction will be generated, and the current will be delivered by the stator coil. In order to protect the electrical equipment and maintain its normal operation, the current generated by the generator also needs a regulator for adjustment control and so on.

As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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