In 480 days, from 50.23% to 51.09%, this 0.86 percentage points made Weichai set a new world record again!
How hard is it to improve by 0.86 percentage points? It's like the first time in human history that a hundred meters run into 10 seconds and then break through the limit.
On September 16, 2020, Weichai created a revolutionary breakthrough in the history of internal combustion engine development, and the thermal efficiency of the diesel engine body exceeded 50% - reaching 50.23%! 480 days later, on January 8, 2022, this number increased to 51.09%!
How are limits spelled out? Please read the blockbuster report published on the front page of the Dazhong Daily today - "Taking the "Military Order" and Spelling Out the "Limit Value"" "."
Take the "military order" and spell out the "limit value"
The thermal efficiency of Weichai Power Diesel engine body reached 51.09% for the first time in the world, setting another world record
□ reporters Zhao Hongjie, Liu Bing, and Yang Xueying reported
Jinan, January 8, like the first 100 meters in human history to run into 10 seconds and then break the limit, after 480 days, Weichai power diesel engine body thermal efficiency increased by 0.86 percentage points, reaching a staggering 51.09%. Today, Weichai Group released this "explosive" news in Jinan.
The level of thermal efficiency is the core symbol of the comprehensive strength of a country's diesel engine technology, and improving thermal efficiency is the common pursuit of the whole industry in the 125 years since the birth of diesel engine. On September 16, 2020, Weichai released the world's first commercial diesel engine with a thermal efficiency of more than 50%, and a thermal efficiency of 50.23% set a milestone in the world's internal combustion engine industry.
Without the idea of "taking a breath and resting your feet", Weichai's research team challenged the new target of 51%. At the beginning of the new year in 2021, Weichai Group officially released 14 "military order" scientific research projects that are in urgent need of research, subdivided into more than 40 "unveiling and hanging" units, supporting 160 million yuan of incentive funds. The thermal efficiency of the diesel engine body exceeded 51%, which is one of the projects.
Leading the "Military Order" project, Wang Zhijian, CEO of Weichai Power, was excited and felt more "pressure mountain": Weichai set a bold deadline for the "Military Order" - to be realized within this year.
"It was almost impossible to finish." Wang Zhijian understands in his heart that even if it is increased by 0.1 percentage points, it is necessary to readjust and optimize almost all the engine systems such as friction, heat dissipation, combustion, etc., and increase it by nearly 1 percentage point, and it is necessary to carry out countless design, feasibility analysis and simulation experiments.
More than 200 R&D personnel participated in the unveiling of the list, racing against the clock to carry out technical research. "Even walking is thinking about technical problems." Dou Zhancheng, one of the core members of the project team and director of the system calibration office of Weichai Power Engine Research Institute, said that in addition to normal working hours, more than 1,400 hours were "squeezed" out for unveiling the project throughout the year.
Thermal efficiency and exhaust emissions are a pair of "contradictions", the higher the former, the more difficult it is to meet the standards of the latter. In an exchange with the supplier, the researchers accidentally learned that an aerodynamic design concept applied to the aerospace engine abroad may be helpful for technical research. "For more than 40 consecutive days, I studied the relevant literature day and night, and finally found key clues in an English textbook published in 1989." Lv Shun, deputy director of the air system design office of Weichai Power Engine Research Institute, said.
Since September 2021, in order to meet the most stringent China VI B emission requirements, Dou Zhancheng and his colleagues began to iterate on the combustion chamber design plan, and in less than a month, the plan optimized more than 200 versions, and finally achieved a breakthrough based on the 50% thermal efficiency proprietary technology. "Weichai's high thermal efficiency technology is at the most advanced level in the global engine industry." Xing Ruijiang, General Manager of TÜV Nande Certification & Testing (China) Co., Ltd. in China, said.
"Verify passed!" On December 16, 2021, cheers came from the 4th floor of the office building of Tianjin authoritative certification body - Weichai researchers completed the feat of breaking through 51% of the thermal efficiency of the diesel engine body half a month ahead of schedule.
This breakthrough is of great significance to the "double carbon" strategy. Chairman Tan Xuguang introduced that compared with the existing mainstream diesel engines in the market (average 46% thermal efficiency), 51% thermal efficiency diesel engines can achieve fuel consumption and carbon dioxide emissions by 10% respectively, such as the promotion and application of the whole industry, China can save 16 million tons of fuel per year, reduce carbon dioxide emissions by 50 million tons, and create economic benefits of about 140 billion yuan.