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 Wysłany: Czw 19:11, 20 Sty 2011 Temat postu: Mont Blanc pens Analysis of failures with the inve |
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Analysis of failures with the inverse effect
Taken down on the fuel pump, if removed in a cylinder, the deep voice elimination, the fault in the cylinder. If the deep voice reduced, but did not eliminate, the failure may also out in another tank. At this time, can in turn compared to remove a cylinder high-pressure tubing, deep voice does not change the cylinder of each cylinder is excluded, significantly reducing the sound where the cylinder for the failure, fault coverage will be. ② If the engine is off, the injector of each cylinder from the cylinder head down, and installed in the high-pressure oil pipeline terminal, observe the quality of the engine cylinder fuel injection (injection pressure, atomization, fuel injection uniformity , range, taper,[link widoczny dla zalogowanych], etc.). If the different quality of each cylinder fuel injection, you can determine the fault either in the injector, or the fuel pump,[link widoczny dla zalogowanych], or is a combination of the two faults need to be further determined. ③ ① type from the above identified during a trouble-free cylinder 1, 2008 agricultural use and maintenance of about 67 cleaning scale Yilan Yilan County, Heilongjiang Province Agricultural Station Town, Yilan County, Heilongjiang Province, Wang Ai-Yu Gong Township Agricultural Station Zhang Ziqin cars and tractors in the cooling water scale cleaning problem is every driver feel headache. As part of the scale end heat exchanger, heat exchanger performance degradation, so that the engine's heat can not be dissipated in time, not only a waste of fuel and metal parts could easily lead to local overheating, causing the accident, for which the cleaning of scale about the following views: 1. Scale classification. The mechanism of the formation of more complex scale, the main natural water contains mineral salts, in use, when it will reach saturation crystallization, thermal decomposition of mineral salts in water to form insoluble precipitates,[link widoczny dla zalogowanych], which is scale. Scale according to their chemical composition can be divided into four categories: 1) carbonate scale: that calcium carbonate scale in more than 50%; 2) sulfate scale: refers to the content of calcium sulfate scale in more than 50%; 3) silicate Scale: refers to the silica content of greater than 20% of the scale; 4) mixed type scale: the absence of a main component of the scale. 2. Scale of the cleaning method. Currently there are hand-cleaning methods, mechanical and chemical cleaning of three, under normal circumstances, manual cleaning efficiency is low; mechanical cleaning is easy to damage the metal surface; chemical cleaning is ideal, according to the scale in acid or alkaline solution in cases, chemical cleaning and alkaline cleaning and acid into cleaning. 1) alkaline cleaning method commonly used in soda ash and sodium phosphate method. Soda method of sulfate and silicate scale scale works, and sodium carbonate scale method to work. At present, the often recommended synthetic soda, cleaning solution formula is: kerosene, sodium hydroxide,[link widoczny dla zalogowanych], water, cleaning fluid preparation; with sodium carbonate, kerosene, water, cleaning fluid preparation; with sodium hydroxide, sodium, prepared with water Three cleaning fluid. As the power of machinery for the hybrid multi-scale, the choice of the third formula. In order to shorten the cleaning time, sodium hydroxide concentration of 0.3% a 0.5%; sodium phosphate 0.4% a 0.7%. Dubbed the cleaning liquid cooling system was added after a period of time to work cleaning the engine of the residual dirt can not fall off artificially removed, and finally rinse with water. Alkaline cleaning slowly. 2) acid cleaning speed, the principle is: the scale of calcium and magnesium carbonate and hydrochloric acid react to produce magnesium chloride and soluble in water, insoluble in hydrochloric acid for the sulfate or silicate scale, the scale with the surrounding carbonate dissolved off. It is suitable for mixed carbonate and scale of the cleaning. The scale of the clean, timely and thorough as far as possible in order to avoid energy waste and unnecessary accidents. (01) Lord, then turn related to the injector swap, the use of hand trucks to experiment (or in the injector fuel injection pressure test the quality of the experimental device). If the quality of each cylinder injector fuel injection are the same, you can determine the fault in the fuel injector pump on the front; if the transfer with the injector change, then there must be trouble on the injector should be excluded from it. ④ assuming no fault in the fuel injector, and can continue to move forward to analyze the fuel pump. Remove the engine-cylinder high-pressure tubing, hand-crank the crank and see the amount of each cylinder's oil supply, oil supply if there are differences, then the fault must be in fuel pump on, and verify the process analyze ① The faulty engine cylinder. ⑤ the failure of the fuel pump assembly to analyze the relevant parts, mainly the precision coupling of the pump (plunger deputy, the Vice-valve) and supporting the spring wear (such as the plunger spring, the oil valve spring) stretch, etc. conduct demolition inspection,[link widoczny dla zalogowanych], do not meet the requirements should be repaired or replaced. Upper body can be first to open the fuel pump, oil pump plunger pairs compared and the plunger spring wear the soft and hard level. If you have no abnormality, should be checked against the relevant cylinder filling valves of the valve spring and the oil. At this point, if found out of a cylinder valve spring break, the problem is there is the answer, as long as the replacement of a valve spring, the failure will be excluded. (O1)
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