The single-cylinder diesel engine, a key project of the 863 plan led by Changchai Co., Ltd., received orders for 8,000 units in the first quarter of 2014 and gained market recognition. According to reports, Changchai undertook one of the key projects of the National 863 Program more than four years ago - "Key Technology and Product Development for Single-Cylinder Diesel Engines ". The project focused on "Energy Saving and Emission Reduction" to strengthen the energy efficiency of new-generation single-cylinder diesel engines. Fundamental emission reduction research and key technological breakthroughs have important practical significance for improving the fuel economy and reducing emissions of single-cylinder diesel engines in China. “Difficulty in the project development process is how to tackle the key technologies of environmental protection and energy saving of single-cylinder diesel engines to form a high-performance single-cylinder diesel engine-related fuel injection system, combustion system, engine structural optimization and liner, crankshaft and camshaft. Basic common technologies such as material saving and reinforcement of key components, said Sun Jianzhong, director of the Changchai Technology Center. In order to overcome technical difficulties, Changchai jointly researched and developed with Shanghai Institute of Internal Combustion Engines, Jiangsu University, Wuxi Fuel Pumps and Yuzu Research Institute. In 2012, it passed the acceptance of the Ministry of Science and Technology and applied for two national invention patents and four utility model patents. After testing, the fuel consumption rate of the new single-cylinder diesel engine is reduced by more than 8% compared with similar domestic models, and the discharge reaches the US EPA Tier 2 stage requirements. The machine can continuously work more than 750 hours. At present, the product has matured and is put on the market in batches. As of this year, it has accumulatively produced and sold 50,000 units, increased sales revenue for the company by 150 million yuan, and increased profits by 20 million yuan. Technological innovation has allowed Changchai to rejuvenate. In the past three years, the company has implemented 38 technological transformation projects with a total investment of over 300 million yuan. It has continuously implemented and completed a number of major technological transformation projects, including technological transformation projects for advanced production lines of foundries, machining plants and multi-cylinder machine factories. , light engine base technical transformation and so on.
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The results show that the casting aluminum alloy with good casting property or deformation aluminum alloy with good processing plasticity can be obtained by adding certain Ba Au Du element.
2. Good conductivity and thermal conductivity.
The electrical and thermal conductivity of aluminum is second only to silver, copper and gold.
3. The density is small.
The density of aluminum and aluminum alloy is close to 2.7 g / about 1 / 3 of that of iron or copper.
4. High strength.
The strength of aluminum and aluminum alloy is high. The matrix strength can be strengthened by cold working to a certain extent, and some brands of aluminum alloy can also be strengthened by heat treatment.
5. Good corrosion resistance.
The surface of aluminum is easy to produce a dense and firm protective film of Al2O3, which can protect the substrate from corrosion.