al-31 has always been referred to as an imported model engine in the Naval Academy papers
Chinese Engine Development
- Thread starter jackbh
- Start date
by78
General
Could you provide one (or more) previous examples of AL-31 being referred to as imported in naval academy papers?
Is there more info on this engine? Like how many fan/compressor/turbine stages does it have and other specs?
My memory is wrong. In fact, the imported Russian engines in the military articles are directly called Russian turbofan engines.
Failure Mode and Mechanism Analysis and Prevention Technology of Russian Turbofan Engine
by78
General
That's a publicly available (instructional) book published by AVIC, not an academic paper with OPSEC implications from the Naval Aviation University.
Last edited:
World Record -
On November 20, Weichai power released the world's first commercial diesel engine with a thermal efficiency of 52.28% and the world's first commercial natural gas engine with a thermal efficiency of 54.16% in Weifang. The thermal efficiency of the natural gas engine itself exceeded 52% and 54% for the first time in the world.
On November 20, 2022, Weichai released the world's first commercial diesel engine with base engine’s thermal efficiency of 52.28% and natural gas engine with base engine’s thermal efficiency of 54.16%. Li Xiaohong, Party Secretary and President of the Chinese Academy of Engineering, Zhong Zhihua, Party member and vice president of the Chinese Academy of Engineering, Deng Xiuxin, Vice president of the Chinese Academy of Engineering, Ling Wen, Vice governor of Shandong Province and academician of the Chinese Academy of Engineering attended the new product launch event.
TÜV Sud, an authoritative international testing institution, awarded certificates to the representatives of Weichai's high thermal efficiency engine development team.
Steven Hartong, CEO of Bosch Group, Chris Mason, CEO of International Federation of Automotive Engineers, Walter Downing, COO of Southwest Research Institute, Helmut Lister, CEO of AVL of Austria, Wei Wei, President of Chinese Engine Engineers Association of North America, China Mechanical Engineering Society, China Internal Combustion Engine Society, China Internal Combustion Engine Industry Association, etc. Research institutes, industry institutions and strategic partners at home and abroad have sent congratulatory letters and videos.
Since the introduction of the diesel engine 125 years ago, the global industry scientific and technological workers always regarded the improvement of thermal efficiency as the lifelong pursuit of the dream. In September 2020, Weichai released the world's first diesel engine with base engine’s thermal efficiency of 50.23%. In January 2022, Weichai again increased the thermal efficiency of the diesel engine to 51.09%, continuing to lead the global internal combustion engine industry.
Base engine’s thermal efficiency refers to the proportion of diesel combustion energy converted into effective engine output work without relying on waste heat recovery device. The higher the thermal efficiency of the base engine, the better the economy of the engine. Compared with the existing mainstream products in the market (average 46% thermal efficiency diesel engine), the commercial application of 52.28% base engine’s thermal efficiency technology can reduce fuel consumption and carbon dioxide emissions by 12% respectively.
Natural gas engine plays an important role in carbon reduction of the internal combustion engine due to its inherent low carbon properties. In 2008, Weichai began to lay out the gas cylinder direct injection technology. In 2012, it successfully developed China's first large-power in-cylinder high-pressure direct injection compressed combustion natural gas engine. Since 2018, the R&D team of Weichai has achieved two huge leaps in the base engine’s thermal efficiency of natural gas engines, exceeding at the industry level of 42% to 45% and 50% in 2020 and 2021 respectively, In November this year, the base engine’s thermal efficiency of a natural gas engine was successfully improved exceeding the industry's highest level of 47.6% to 54.16%, meeting the Euro VI emission standards. This pioneering work will bring huge practical value to the whole society, can be saved fuel costs by more than 20%, carbon emission in the industry reduced by 25% or 30 million tons per year.
On November 20, Weichai power released the world's first commercial diesel engine with a thermal efficiency of 52.28% and the world's first commercial natural gas engine with a thermal efficiency of 54.16% in Weifang. The thermal efficiency of the natural gas engine itself exceeded 52% and 54% for the first time in the world.
On November 20, 2022, Weichai released the world's first commercial diesel engine with base engine’s thermal efficiency of 52.28% and natural gas engine with base engine’s thermal efficiency of 54.16%. Li Xiaohong, Party Secretary and President of the Chinese Academy of Engineering, Zhong Zhihua, Party member and vice president of the Chinese Academy of Engineering, Deng Xiuxin, Vice president of the Chinese Academy of Engineering, Ling Wen, Vice governor of Shandong Province and academician of the Chinese Academy of Engineering attended the new product launch event.
TÜV Sud, an authoritative international testing institution, awarded certificates to the representatives of Weichai's high thermal efficiency engine development team.
Steven Hartong, CEO of Bosch Group, Chris Mason, CEO of International Federation of Automotive Engineers, Walter Downing, COO of Southwest Research Institute, Helmut Lister, CEO of AVL of Austria, Wei Wei, President of Chinese Engine Engineers Association of North America, China Mechanical Engineering Society, China Internal Combustion Engine Society, China Internal Combustion Engine Industry Association, etc. Research institutes, industry institutions and strategic partners at home and abroad have sent congratulatory letters and videos.
Since the introduction of the diesel engine 125 years ago, the global industry scientific and technological workers always regarded the improvement of thermal efficiency as the lifelong pursuit of the dream. In September 2020, Weichai released the world's first diesel engine with base engine’s thermal efficiency of 50.23%. In January 2022, Weichai again increased the thermal efficiency of the diesel engine to 51.09%, continuing to lead the global internal combustion engine industry.
Base engine’s thermal efficiency refers to the proportion of diesel combustion energy converted into effective engine output work without relying on waste heat recovery device. The higher the thermal efficiency of the base engine, the better the economy of the engine. Compared with the existing mainstream products in the market (average 46% thermal efficiency diesel engine), the commercial application of 52.28% base engine’s thermal efficiency technology can reduce fuel consumption and carbon dioxide emissions by 12% respectively.
Natural gas engine plays an important role in carbon reduction of the internal combustion engine due to its inherent low carbon properties. In 2008, Weichai began to lay out the gas cylinder direct injection technology. In 2012, it successfully developed China's first large-power in-cylinder high-pressure direct injection compressed combustion natural gas engine. Since 2018, the R&D team of Weichai has achieved two huge leaps in the base engine’s thermal efficiency of natural gas engines, exceeding at the industry level of 42% to 45% and 50% in 2020 and 2021 respectively, In November this year, the base engine’s thermal efficiency of a natural gas engine was successfully improved exceeding the industry's highest level of 47.6% to 54.16%, meeting the Euro VI emission standards. This pioneering work will bring huge practical value to the whole society, can be saved fuel costs by more than 20%, carbon emission in the industry reduced by 25% or 30 million tons per year.
Last edited:
The previous record in truck engines was held by Weichai with 50% too.
This is why I laugh at people who claim China is somehow deficient in piston engines. It is not. It is just a market with a lot of brand inertia which forced many Chinese manufacturers to compete in lower-end segments. People think you instantly get a good market share if you come up with a good product. That never happens because of customer perceptions, existing contracts, installed support base, OEM product cycles, etc...