4. The cylinder liner of a two-stroke diesel engine is arranged with an air port, which is opened and closed by a piston to realize gas distribution. During engine operation, the cylinder liner may encounter several problems: Cylinder Liner Supplier For MITSUBISHI,Cylinder Liner Set,Cylinder Liner For MITSUBISHI,Cylinder Liner For MITSUBISHI Engine Parts,original Cylinder Liner For MITSUBISHI 1D auto parts , https://www.1dauto.com
First, they can crack or leak due to overheating or excessive pressure, leading to compression loss and reduced engine performance.
Second, over time, the cylinder liner may wear or scratch, leading to poor seal of the Piston Ring, resulting in a slow increase in fuel consumption.
Finally, incorrect cylinder liner installation can result in misaligned pistons, causing serious engine damage.
Regular inspection and maintenance of the cylinder liner is essential to ensure optimal engine performance and longevity.
At present, China's coking industry is facing widespread operational challenges and is experiencing losses across the entire sector. The domestic price of coke has dropped to 950 yuan per ton, while the average export price has fallen to 130 U.S. dollars per ton—a 50% decline. This downturn has been driven by overcapacity, leading to a buildup of unsold products, while raw coal prices continue to rise. As a result, coke has become one of the few industries identified as oversupplied by the National Development and Reform Commission.
During a recent coke market symposium in 2024, industry experts called for stronger macroeconomic control over the coking sector, emphasizing the need to accelerate restructuring, eliminate outdated production capacity, and promote industrial upgrading. Since 2002, rapid economic growth and the expansion of the steel industry have spurred massive investment in coking projects. At that time, China had not yet implemented an official access system for the coking industry, allowing many small-scale coke ovens that did not meet national standards to operate unchecked. This led to a sharp increase in domestic coke production capacity.
According to official data, China's annual machine coke production capacity was 108 million tons in 2002. By the end of 2005, it had surged to approximately 320 million tons—an increase of more than double in just three years. Additionally, there were ongoing projects with an annual capacity of 100 to 150 million tons. These capacities far exceeded the actual market demand, which stood at around 270 million tons annually.
Currently, China's total coking capacity is spread across more than 1,300 enterprises, with an average of less than 200,000 tons per company. Moreover, there are tens of millions of tons of unregulated "soil coke" (unofficial or illegal coke production) that remain unburned, leading to low resource efficiency and severe environmental pollution. These operations do not comply with national coking industry policies and pose significant challenges to sustainable development. (Yao Wen)
The Cylinder Liner is a cylindrical part that is placed in the cylinder block hole of the body and is secured by the cylinder head. The piston reciprocates in its inner hole and is cooled by cooling water outside.
The functions of the cylinder liner are:
1. Together with the cylinder head and piston, it forms the cylinder working space.
2. The cylinder liner of the cylinder piston diesel engine is the lead of the reciprocating movement of the piston, which is subjected to the side thrust of the piston.
3. The heat of the piston assembly and itself is transferred to the cooling water to make the working temperature appropriate.