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喷油嘴针阀杆部配合表面仍较光亮而无明显磨损时,可通过以下工艺修复。 1.清洁和检查使用超声波清洗喷油嘴。首先清除所有的硬质积炭,其方法是将56克烧碱溶于0.47升的水里,再加入14克洗衣粉。注意测量碱的含量,其浓度若高于15%,就会腐蚀喷孔及喷油嘴的接合面,这样的溶液是不能用的。清除积炭后,将零件放入清水中刷洗干净,然后用压缩空气吹干。用放大镜在良好的光线下仔细观察针阀杆部的磨损程度和其它有关部位有无任何损坏或腐蚀现象,其次看针阀锥面是否烧坏变色。若上述检查均正常,再检查针阀升程。针阀升程如果超出规定值,表明座面磨损过大,应报废。通常针阀在
When the fitting surface of the injector needle stem is still bright without obvious wear, the following process can be used to repair it. 1. Cleaning and inspection Use ultrasonic cleaning nozzle. First remove all hard deposits by dissolving 56 grams of caustic soda in 0.47 liters of water and adding 14 grams of detergent. Note that measuring the alkali content, the concentration of more than 15%, it will corrode the nozzle and the nozzle surface, such a solution can not be used. After removing coke, put the parts into clean water, scrub clean, then dry with compressed air. With a magnifying glass in a good light carefully observe the degree of wear and tear of the needle stem and other parts without any damage or corrosion, followed by the needle valve cone burn discoloration. If the above tests are normal, then check the needle valve lift. Needle valve lift beyond the specified value, indicating that the seat wear is too large, should be scrapped. Usually needle valve in