piston ring, and the accumulation of coke carbon in the
groove will stuck and even break the piston ring。 The carbon in the combustion chamber blocks the nozzle and increases the consumption of diesel oil, resulting in black smoke, poor fuel economy and low power efficiency。
In addition, plenty of researchers’ findings suggest that the oil consumption rate significantly influences the particulate emission of the diesel engine。 After the oil is thrown off into the combustion chamber, the particulate
emission from the diesel engine will be increased。 The proportion of particulate emission of diesel produced by oil has a relationship with the structure and type of the engine,
operating conditions and the physical and chemical properties of the oil。 In order to limit the diesel particulate emission and reduce the pollution to meet the increasingly stringent emission regulations, the reduction of oil consumption rate becomes an important issue in the development, design and operation of diesel engines。 The oil consumption, which is also influenced by many
other factors, happens in many positions of the diesel engine, such as the cylinder, the valve guide, the separator of oil and gas, the turbocharger, and so on。 Under the normal condition, either from the view of the total oil
consumption or the effect on the particulate emission, the oil consumption in the cylinder plays a dominant role。 The experiment suggests that the oil consumption in the cylinder accounts for about 90% of the total oil consumption。 There are so many factors such as the oil composition, the engine body, the assembly structure of cylinder liner and the piston ring and operating conditions, greatly affecting the oil consumption rate。 So the oil consumption mechanism in the cylinder is very complex。 Most studies have been done by using the experimental
method which is very costly。 In this paper, the mechanism of oil consumption in the cylinder is summarized。 The oil consumption in cylinder of a specific diesel engine is calculated on the basis of the oil consumption mechanism。 The effects of the piston ring parameters on the oil
consumption are also analyzed and compared with the experimental results。 It is shown that the calculated results present good precisions。 Then, a BP neural network model of the relationship between each parameter of the piston 柴油机缸内润滑油消耗分析英文文献和中文翻译(2):http://www.youerw.com/fanyi/lunwen_98513.html