What is a Diesel Engine?

A diesel engine is a type of internal combustion engine. Internal combustion engines intake fuel directly into the combustion chamber, where it is ignited to produce energy. This energy is then converted into mechanical motion to power a vehicle or machine.

Thanks to its robust structure and low fuel consumption, the diesel engine is often preferred in heavy vehicles, commercial transportation, and generators.

When Was the Diesel Engine Invented, Who Invented It, and How Did It Develop?

The diesel engine was designed by German engineer Rudolf Diesel in 1892. He patented it in 1893 and introduced the first functioning engine in 1897. Initially developed for stationary engines, this technology later found use in ships, trains, and land vehicles.

The evolved systems in today’s modern diesel engines combine high efficiency, low emissions, and quiet operation—resulting in environmentally friendly and durable engines.

Working Principle of a Diesel Engine

A diesel engine operates on a four-stroke cycle: intake, compression, combustion, and exhaust. First, only air is drawn into the cylinder. This air is compressed by the piston, increasing its temperature. Diesel fuel is then directly injected into the combustion chamber.

At this stage, the high temperature causes the fuel to ignite spontaneously—eliminating the need for spark plugs. The explosion pushes the pistons down, rotating the crankshaft.

This motion provides power to the vehicle. Running engines repeat this cycle dozens of times per second.

The diesel engine offers higher efficiency than gasoline engines due to its high compression ratio.

Advantages of Diesel Engines

• Low fuel consumption: Travels longer distances with less fuel.
• Long lifespan: Durable thanks to its solid structure.
• High torque output: Beneficial especially in load-carrying vehicles.
• High performance at low RPM: Maintains efficiency.
• Long range: Travels further on a single tank.
• Modern diesel engines feature eco-friendly technologies.

Parts of a Diesel Engine

Each diesel engine consists of many components with different functions. Here are the main ones:

• Cylinder Block: The main structure of the engine.
• Piston: Converts combustion energy into mechanical motion.
• Valves: Control intake and exhaust gases.
• Injector: Sprays fuel directly into the combustion chamber.
• Crankshaft: Converts vertical piston movement into rotary motion.
• Turbo: Boosts air intake to enhance performance.
• Exhaust Manifold: Expels burnt gases.
• Oil Pump: Provides lubrication for component operation.

KJ Power collaborates with the world’s leading engine and alternator brands holding international certifications. As KJ Power, we export our generator sets to more than 120 countries.

In addition to public institutions and organizations in Turkey and around the world, we serve various sectors such as petroleum, banking, housing, telecommunications, food, health, defense, and education.

Moreover, with its commitment to continuous development and quality-oriented approach, KJ Power produces:

• Compact sound-insulated silent generator enclosures ranging from 10 kVA to 3000 kVA in accordance with international standards
• Control and transfer panels for generators
• Lighting towers, Gentruck, mobile generators, and diesel generators with cogeneration systems.