China’s Weichai Group has launched a record-breaking commercial diesel engine with a brake thermal efficiency of over 50%.
According to The Engineer, the new diesel engine’s brake thermal efficiency was clocked at 50.26% by Germany’s TÜV SÜD and China Automotive Technology and Research Center.
Industrial experts point out that engines of such caliber could help save 33.32 million tons of fuel each year and reduce CO2 emissions by 104.95 million tons.
Brake thermal efficiency is a measure of the fuel efficiency of internal combustion engines.
The higher the brake thermal efficiency is, the less the fuel consumption will be and the better the energy saving and emission reduction performance will be.
Since 1897, diesel engine manufacturers have been trying to increase the engine’s brake thermal efficiency and it currently stands at 46%.
As the above figures state, what Weichai has successfully done is increase brake thermal efficiency by a staggering four percent.
This was made possible by Weichai’s five proprietary technologies that helped it achieve high efficiency combustion with low heat transfer, high PFP with high reliability, low friction loss, low emission of pollutants, and intelligent control.
The five technologies in question are field synergy combustion technology, harmonious design technology, exhaust energy distribution technology, subzone lubrication technology and WISE control technology.
Field synergy combustion technology helps optimize the design of the air passage, fuel injection, combustion chamber profile and other systems.
It thus makes the relationship between the velocity field and concentration field in the combustion chamber more harmonious, increasing combustion speed by 30%.
The subzone lubrication technology on the other hand uses different friction reduction technologies in different areas to reduce the overall friction by 20%.
Likewise, the WISE control technology uses the advantages of Weichai’s self-developed ECU, creatively developing a series of more precise control predictive models, so that every part of the diesel engine can be more efficient.
According to Weichai, the new base diesel engine hasn’t just broken the brake thermal efficiency record:
It also comes ready for mass production and commercialization, and has met the China VI/Euro VI emission requirements.
Image and content: Weichai/The Engineer