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From China to the World: The Most Efficient Diesel Engine! Weichai Presents Thermal Efficiency of 53.09%, Leading in Technology
Since the invention of the internal combustion diesel engine 127 years ago, engineers and scientists have been working to improve its thermal efficiency.
China’s Weichai Power has set a new record for thermal efficiency in diesel engines, achieving 53%. This breakthrough, which overcomes technical challenges and drives sustainability, reflects a continuous and collaborative effort in the internal combustion industry. Discover more about this significant achievement and its implications for the future.
Weichai Power: The Most Efficient Diesel Engine in the World
At a recent event in Tianjin, China, during the 2024 World Internal Combustion Engine Congress, the Chinese company Weichai Power made history by unveiling the first diesel engine with a thermal efficiency of 53.09%. This achievement not only represents a technological advancement but also an important step towards sustainability in the use of fossil fuels.
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Development and International Recognition
This milestone has been recognized by international organizations such as TÜV SÜD and the China Automotive Technology and Research Center, which confirmed this world record for thermal efficiency, a key economic indicator in diesel engines. Since its invention 127 years ago, the continuous improvement of diesel engine thermal efficiency has been a constant challenge, reflecting the technological advancement and industrial strength of nations.
Continuous Innovation and Collaboration
Since 2015, Weichai Power has developed a research team in high thermal efficiency engines, composed of hundreds of PhDs and thousands of engineers. This team has collaborated with national and international experts and industry partners and universities to advance the frontiers of technological innovation. On September 16, 2020, the company reached a milestone by launching a diesel engine with a thermal efficiency of 50.23%. This figure increased to 51.09% on January 8, 2022, and most recently, on November 20, 2022, the thermal efficiency reached 52.28%, consolidating Weichai Power’s leading position in the global internal combustion engine industry.
The research team continued to refine four critical systems: combustion, air intake, fuel supply, and friction reduction. Through incremental improvements, Weichai Power surpassed the 53% thermal efficiency barrier for the first time globally. During this period, the team secured 176 invention patents and 68 utility model patents.
The increase in thermal efficiency not only improves fuel performance but also significantly contributes to reducing carbon emissions. These improvements could lead to an annual savings of about 31 million tons of fuel and a reduction of approximately 97 million tons in carbon emissions.
What Does This Record Efficiency Really Mean in Practical Terms?
For drivers and owners of heavy and agricultural vehicles, the improved thermal efficiency translates into significant fuel savings. Weichai Power claims that this engine can reduce fuel consumption by 14%, which, for a truck or tractor traveling 250,000 kilometers per year, translates into savings of up to 12,000 liters of fuel annually.
In economic terms, with an average diesel price of 5.50 reais per liter, this would represent savings of 66,000 reais per year. The development of this engine was the result of meticulous and dedicated work, with nearly 200 patents registered in the project.
Source: prnewswire.com
How a Diesel Engine Works
Imagine that a diesel engine is like a large pump of air and fire that helps move cars and trucks. Here is an explanation step by step:
Air Intake: First, the engine draws in air from the outside and introduces it into a chamber called a cylinder. In a diesel engine, only air enters, without mixing it with gasoline as in other engines;
Air Compression: Once the air is inside the cylinder, a piston (which is like a large pusher) rises and compresses this air, meaning it squeezes it very tight. By compressing the air, it heats up a lot, so much that it could almost cook an egg;
Fuel Injection and Combustion: At this moment, when the air is very hot and compressed, a little diesel fuel is injected. Since the air is hot, the fuel ignites automatically, without the need for sparks as in other engines. This explosion pushes the piston down;
Energy Generation: The movement of the piston downward is what actually produces the energy that makes the wheels of the car or truck turn and thus move the vehicle;
Gas Expulsion: Finally, after the explosion, the gases formed must exit to make room for more fresh air and start the cycle again. The piston rises again, pushing the gases out and preparing to draw more air and start the process once more.
It’s like the engine is breathing: it inhales air, uses it to create an explosion with the fuel, and then exhales the gases. And all of this happens very quickly, often multiple times per second, so that the car or truck can move smoothly. It’s impressive how a series of small explosions can make something as big as a vehicle move!
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Muito inovador e esclarecedor.