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紫外線熒光染料對燃油系統染色和檢漏

作者:luyor時間:2020-07-05 21:06瀏覽344 次

信息摘要:

關閉發動機,然后開始使用紫外線熒光檢漏燈查找外部泄漏。對于發動機內部泄漏,請檢查要檢查的組件,然后使用紫外線熒光檢漏燈檢查。在某些帶有電動燃油泵的發動機上,您可能會排放機油并放掉排放塞。使用具有雙向控制功能的掃描工具打開燃油泵,然后等待燃油從曲軸箱滴落。染料的存在將僅確認燃油泄漏的事實……這證明需要檢修閥蓋或泵并繼續檢查。在某些情況下,可能有必要在檢查泄漏的同時運行發動機。

紫外線熒光染料對燃油系統染色和檢漏

檢測和查明燃油系統泄漏可能很困難并且很耗時。燃料是低粘度的流體,意味著它可以快速遷移并與其他流體混合。對于具有位于發動機內部且隱藏在機蓋下的組件的燃油系統,尤其如此。這意味著發現這些泄漏并驗證維修對防止重復維修和嚴重的發動機損壞非常重要。對于任何燃油噴射系統,安全性也是另一個考慮因素,對于高壓共軌燃油系統而言,安全性甚至更高。即使通過許多類型的手套,在高壓下噴灑的燃油也很容易滲透到人體皮膚,必須避免暴露于危險中。注入皮膚的燃料可能使血液中毒,導致肉體受損和感染,從而導致手指和四肢脫落,甚至導致死亡。

在燃料中添加紫外線示蹤劑染料將有助于識別和查明燃料泄漏,并有助于提高安全性。舊時可能會想起曾經在燃油泵,管路和噴油器上運行一塊紙板或紙的時間,這是定位泄漏的一種常用方法。使用染料和紫外線燈可使您的身體在檢查期間保持安全距離。

從診斷上來說,示蹤染料的使用遠勝于任何其他視覺方法,因為即使存在少量泄漏,該染料也非常明顯。以下兩張照片顯示了示蹤劑染料的兩個示例,這些示蹤劑染料用于診斷具有高壓共軌燃油系統的6.4升Power Stroke柴油發動機的燃油泄漏。在個示例中,在燃油入口配件處出現了較小的緩慢泄漏,否則可能很難發現。第二個例子是另一個噴油器在上半部螺母處泄漏,并且是一個相當大的泄漏,用肉眼可以很明顯地看到,但是很難確保它不僅是發動機油從相鄰的閥部件上濺出。

熒光檢漏劑在紫外線燈照射下發光

要使用,請將一瓶紫外線示蹤劑染料添加到燃油濾清器外殼中-多個濾清器系統上的輔助或引擎安裝濾清器。通常,瓶子的裝瓶量約為3盎司,您需要確保使用配制用于油溶性熒光檢漏劑的染料。請勿使用水基熒光示蹤劑染料(冷卻劑)或空調制冷劑染料。然后啟動系統并運轉發動機約十五分鐘,使染料與燃料混合并在系統內循環。關閉發動機,然后開始使用紫外線熒光檢漏燈查找外部泄漏。對于發動機內部泄漏,請檢查要檢查的組件,然后使用紫外線熒光檢漏燈檢查。在某些帶有電動燃油泵的發動機上,您可能會排放機油并放掉排放塞。使用具有雙向控制功能的掃描工具打開燃油泵,然后等待燃油從曲軸箱滴落。染料的存在將僅確認燃油泄漏的事實……這證明需要檢修閥蓋或泵并繼續檢查。在某些情況下,可能有必要在檢查泄漏的同時運行發動機。

熒光檢漏劑在紫外線燈照射下發光

上海路陽提供多種熒光檢漏劑和熒光檢漏燈,如欲進一步了解詳細信息,請電話聯系我們銷售工程師,189-1703-9682

Fuel System UV Dye-agnosis

Detecting and pinpointing fuel system leaks can be difficult and time consuming. Fuel being a fluid of light viscosity means that it can migrate quickly and mix with other fluids. This is especially true for fuel systems with components that are located inside an engine and hidden under covers. This means that finding these leaks and verifying repairs is very important to prevent repeat repairs and severe engine damage. Safety is also another consideration with regard to any fuel injection system and even more so with high pressure common rail fuel systems. Fuel spray under high pressure will easily penetrate human skin, even through many types of gloves and risking exposure must be avoided. Fuel injected into the skin can poison blood, cause flesh damage and infections resulting in removal of fingers and limbs or even cause death.

Adding ultra-violet tracer dye to fuel will help identify and pinpoint fuel leaks and help promote safety. Old-timers might recall a time when running a piece of cardboard or paper along fuel pumps, lines and injectors was a common method of locating leaks. Using dye and an ultra-violet lamp keeps your body at a safe distance during inspections.

Diagnostically speaking the use of tracer dye is by far superior than any other visual method because the dye is extremely visible even when a small leak is present. The following two photographs show two examples of tracer dye being used to diagnose fuel leaks on 6.4L Power Stroke diesel engines that have a high pressure common rail fuel system. In the first example a smaller, slow leak at the fuel inlet fitting that otherwise might not have been easy to find. The second example another injector is leaking at the upper body nut and is a fairly large leak that was fairly obvious to see with the naked eye yet difficult to be absolutely sure that it also was not just engine oil splashing off of the adjacent valve components.

To use, add one bottle of UV Tracer Dye to the fuel filter housing - secondary or engine mounted filter on multiple filter systems. Typically the bottles contain about 3-ounces and you need to be sure to use dye formulated for use with oil based fluids. NOT water based dyes (coolant) or refrigerant dye (air conditioning). Then prime the system and run the engine for about fie minutes to get the dye mixed with the fuel and circulating within the system. Shut the engine down and begin searching for external leaks with a UV lamp. For internal engine leaks access the components to be inspected then inspect with a UV lamp. On some engines with electric fuel pumps you may drain the engine oil and leave the drain plug out. Turn the fuel pump on with a scan tool capable of bi-directional control and wait to see fuel dripping from the crankcase. The presence of dye will simply confirm the fact that fuel is leaking... validating the need to access valve covers or pumps and continue inspecting. In some instances it may be necessary to run the engine while inspecting for leaks.


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