Core Insights - The internal combustion engine industry is undergoing unprecedented changes against the backdrop of a global energy restructuring and evolving market demands [1][7] - The market is experiencing a complex trend of "month-on-month decline and year-on-year growth" as reported by the China Internal Combustion Engine Industry Association [1][2] Market Performance - In May 2025, the internal combustion engine market saw a sales volume of 4.1561 million units, reflecting a month-on-month decline of 6.74% but a year-on-year increase of 12.31% [2] - Cumulative sales from January to May reached 21.6427 million units, with a year-on-year growth of 16.36%, indicating resilience amid economic recovery [2] Fuel Type Analysis - Diesel engine sales in May were 401,000 units, down 16.46% month-on-month but up 1.47% year-on-year; gasoline engine sales were 3.7496 million units, with a month-on-month decline of 5.56% but a year-on-year increase of 13.57% [3] - Cumulative data for January to May shows diesel engine sales at 2.2494 million units (3.77% growth) and gasoline engine sales at 19.3636 million units (17.99% growth) [3] Application Segmentation - In May, various application sectors showed distinct performance: passenger vehicles grew by 10.37%, commercial vehicles by 1.87%, agricultural machinery by 3.50%, and marine applications surged by 20.20% [3] - The growth in the passenger vehicle market is attributed to rising consumer purchasing power and upgrades in automotive consumption [3] Industry Concentration - The market concentration is increasing, with leading companies like Weichai and Yuchai holding 77.36% of the multi-cylinder diesel engine market [4] - China has become the largest and most complete internal combustion engine manufacturing country globally, producing approximately 80 million new units annually during the 14th Five-Year Plan [4] Technological Innovations - Significant advancements in emission standards and thermal efficiency have been achieved, with diesel engines improving by about 50% and gasoline engines reaching 40%-42% efficiency [4] - Innovations in alternative fuels, such as natural gas and methanol, are paving new paths for energy conservation and emission reduction [4][5] Green Transition - Innovations in gas engine technology, such as advanced combustion control and efficient energy conversion systems, are driving the industry towards a greener and more sustainable future [5][7] - New products like the 20M61 engine and the WP13 methanol engine showcase the industry's competitive edge in high-end power generation and green energy solutions [6] Future Opportunities - The internal combustion engine industry faces both challenges and opportunities, with a need for increased investment in green energy technologies and diversified fuel applications [8] - The integration of smart technologies into internal combustion engine products is expected to enhance performance and efficiency, meeting diverse application needs [8]