◎Our reporter Wang Yanbin
Currently, the global average thermal efficiency of natural gas engines is 42%. Among them, Sweden's Volvo Trucks has won the global championship with a value of 47.6%.
But the emergence of a new domestic engine broke this record.
On November 20, Weichai released a commercial product of a natural gas engine with a thermal efficiency of 54.16%.
At the same time, the diesel engine developed by the group with a thermal efficiency of 52.28% was released together.
For the natural gas engine and diesel engine industries, this is a new world record, and it also means that the thermal efficiency of a natural gas engine exceeds that of a diesel engine for the first time in history.
At the release site, the world's authoritative testing organization - Germany's TüV SÜD Group issued certification certificates for these two new records.
Li Xiaohong, Secretary of the Party Leadership Group and President of the Chinese Academy of Engineering, Zhong Zhihua, Member of the Party Leadership Group and Vice President of the Chinese Academy of Engineering, Deng Xiuxin, Vice President of the Chinese Academy of Engineering, and Ling Wen, Vice Governor of Shandong Province and academician of the Chinese Academy of Engineering, witnessed the event.
"This kind of transcendence is too difficult." Jia Demin, assistant to the president of the Weichai Power Future Technology Research Institute, told the reporter of Science and Technology Daily that the thermal efficiency of the natural gas engine body has been increased to 54.16%, which meets the requirements of the National VI emission standards. A major breakthrough in the field.
It is worth noting that the diesel engine with a body thermal efficiency as high as 52.28% is Weichai's third major breakthrough in three years.
In 2020, the thermal efficiency of the diesel engine body developed by the group exceeded 50.23%; in January this year, this value was raised to 51.09%.
Today, the data is refreshed again.
Since 2018, Weichai has continued to carry out research on key technologies of high-efficiency high-pressure direct-injection natural gas engines, and successfully applied key common technologies of high thermal efficiency of diesel engines such as high-efficiency supercharging, low resistance, and low friction to natural gas engines; they invented dual-fuel fusion injection The point lean combustion technology realizes the precise control of fuel injection, and the combustion speed is increased by 100%; the dual-fuel fusion injection combustion system with the double-step combustion chamber system as the core is invented, which improves the thermal efficiency of the engine while reducing pollutant emissions, and has applied for 165 patents , authorized 135 patents.
"Excitement! Thanks! Support!" Li Xiaohong expressed her feelings for the two world records in the above three words in her speech at the scene.
He said that the Chinese Academy of Engineering has brought together outstanding scientists from various industries, and the thermal efficiency of Weichai diesel engines will hit 53%, 54%, and 55% in the next step. "We will fully support it!"
The above-mentioned breakthroughs have also attracted the attention of international counterparts.
At the scene, scientific research institutions such as the International Federation of Automotive Engineers, the Southwest Research Institute of the United States, the Austrian AVL Company, the German Bosch Group, international counterparts, as well as the Chinese Mechanical Engineering Society, the Chinese Internal Combustion Engine Society, and the China Internal Combustion Engine Industry Association sent congratulatory letters and videos to the company. Highly rated.
Compared with the industry average, the 52% thermal efficiency diesel engine can reduce carbon dioxide emissions by 12%, and the 54% thermal efficiency natural gas engine can reduce carbon dioxide emissions by 25%.
If all of them are switched, it is expected to reduce my country's carbon emissions by 90 million tons per year.