哪位高手能帮忙找篇关于汽车发动机汽缸磨损的英语文章毕业设计用的

哪位高手能帮忙找篇关于汽车发动机汽缸磨损的英语文章毕业设计用的
哪位高手能帮忙找篇关于汽车发动机汽缸磨损的英语文章
毕业设计用的

哪位高手能帮忙找篇关于汽车发动机汽缸磨损的英语文章毕业设计用的
是要英语对么?
中文网址：http://info.qipei.hc360.com/2008/06/19144697782.shtml
英语翻译：1, cylinder wear law
Cylinder in use wear (referring to the region of the piston ring sports) are non-uniform along the length of the cylinder direction (vertical section) look, wear and tear are big on small, loss of the original cylindrical shape. Wear along the circumferential direction after the loss of the original circle shape, the maximum radial wear of the region in general across from near the intake valve. Cylinder Piston catchy reach places, almost no wear and tear, so the formation of a "higher level."
2, cylinder wear and tear of the types and causes
2.1 normal wear and tear
Ground into a large cylinder on the main reason for small are: the upper part of the worst lubrication; piston ring up at the next stop point speed near 0, the formation of oil film is not easy. Cylinder radial wear of the main reasons for inequality are: intake of blowing shot, washed role of lubricants缸壁more diluted and the formation of corrosive ingredients.
2.2 Abnormal Wear
1) Materials are corrosion-wear surface with the surrounding medium happened electrochemical reaction resulting from the engine cylinder at low temperature, fuel combustion is not sufficient under the conditions would have serious corrosive wear. Engine cooling water temperature is low or low-temperature start-up frequency, the easy to produce more acids, acidic materials in direct contact with the cylinder form a fragile thin-layer, this thin layer of plaster in the external force to form the corrosive wear.
2) to enter the air cylinder contains a lot of dust caused by severe abrasive wear.
3) Oil of impurities, such as dust particles cause severe abrasive wear.
4) new or overhauled without running directly into the cylinder when the homework, because the surface of the cylinder and piston surfaces, when the exercise of mutual embedded abrasive wear resulting in the cylinder surface parallel to the cylinder axis pull marks, commonly known as "pull-cylinder."
5) adhesive wear. Cylinder and piston ring lubrication at the case of non-performing when the relative sliding between an insignificant part of the metal surface friction direct local heat, to make it melt adhesive, shedding and gradually expand that produce adhesive wear.
6) after the wear ring off. Piston ring Road usually has 3-4, the first ring fracture more easily. The ring fracture, the second Ring Road, the lubrication conditions to damage, wear and tear aggravated the cylinder to form a "two Units."
3, slow down the engine cylinder wear Ways
Delay cylinder engine wear, extend engine life are an important way. From the transport business equipment technology management point of view, the main points of its work through the proper use and reasonable maintenance, to avoid friction cylinder do pay friction, boundary friction, reduce abrasive wear, corrosion and wear, improve the quality cylinder repair. According to experience, can take the following measures.
3.1 operational measures
1) Engine starting appropriate "small, slow, warm." "Little" or start-up should not be frequent, "slow", that is after the first start-up low-speed operation, "warm", that is to be started after the engine temperature is normal. According to analysis, 1 / 3 of the engine wear at start-up phase happen, because the engine only after the normal start-up lubrication, especially in cold winter, oil more viscous, semi-dry friction time is longer, it should first turn cold rolling slowly, so that the engine must be the moving parts of the lubrication after start-up and, if necessary, can be pre-heated hot water. Winter hot Plumbing car since the start-up approach, effective in preventing the start "Scuffing" situation.
2) Run the engine to maintain the normal operating temperature. Temperature is too low there is corrosion on the cylinder wear, temperature too high-thinning lubricants, lubrication bad, easy to produce adhesive wear. To maintain proper engine temperature Ways: In addition to the proper use of water tanks blinds, the section needs to check whether the normal job thermostat.
Some random removal of the vehicle driver section thermostat, resulting in serious cylinder corrosive wear.
3) When traveling, it should be the starting block with low, reasonable load, medium speed, smooth operation. Overload the engine a long time job, prone to bad lubrication, increased cylinder wear, resulting in adhesive wear, the emergence of a serious "pull-cylinder." Taking the above operation method, not only safety, but also effectively slowed the engine wear. Skilled driver a strong sense of responsibility can often be 20-30 million km without major repairs.
4) The engine should not be long, small throttle idling. A result of fuel combustion under conditions of inadequate, resulting in many acidic substances, resulting in serious cylinder corrosive wear.
3.2 day-to-day maintenance of the measures
1) regular cleaning and replacement of air filter. Dust in the air cylinder are caused by abrasive wear of the main reasons, not by the regular air filter cleaning and replacement, would greatly reduce the engine life. Particular attention should be paid after the installation of the air filter seal the airway.
2) To ensure good engine lubrication. In addition to regular inspection pilots insist oil well supplies, the replacement work, must also be the correct choice of oil. The quality and grade of oil should be in accordance with technical requirements, the viscosity should be suitable, too thin lubrication is difficult to guarantee, easy to produce adhesive wear, are too viscous flow impeded, easy to produce in the friction. At summer and winter season, it is necessary to the timely replacement of oil.
3.3 cylinder repair measures
1) insufficient power, it is necessary to check the work of the piston ring. Piston rings working environment is horrendous, easily broken ring and the cylinder appeared abnormal wear and tear, often running after the break ring must be less than 1000km on engine overhaul. Therefore, when the power suddenly found that the engine is insufficient, we should focus on checking whether the piston ring has broken ring, and to facilitate timely treatment.
2) Choose the quality of qualified liner. The quality of the cylinder liner are the determinants of good wear resistance to replace the liner must be purchased from the formal channels of informal manufacturers products, cylinder liner materials are required to wear nice high manganese austenitic cast iron, chrome silicon cast iron , phosphorus boron cast iron, etc., and must go through the surface of heat treatment or chemical heat treatment.
3) the use of advanced cylinder boring process. Cylinder to ensure the accuracy of the positions are a prerequisite for the normal operation of the engine.
4) Improved cylinder honing process. Job cylinder surface roughness on the wear resistance of cylinder, in particular, are a great influence on the early wear and tear, not the more light the better. Face roughness of the cylinder should be Ra0.4-0.8. Honing cylinder should have its inner surface of the mesh cross-沟纹, they generatrix inclination with the cylinder at about 60 ° in order to facilitate the infiltration of lubricants, is conducive to the formation of oil film.
5) do a good job of taking the use of combined period. New engine or engine overhaul should be carried out not less than 2h of the hot mill, and replace lubricants. At walk Hop period, the speed limit should be set for periodic inspection. Go together to do a good job going after the expiration of competent maintenance.