Bypass Oil Filter Views
Early automobile engines did not use oil filters. For this reason, along with the generally low quality of oil available, very frequent oil changes were required. The first oil filters were simple, generally consisting of a screen placed at the oil pump intake. In 1923, American inventors Ernest Sweetland and George H. Greenhalgh devised an automotive oil filter and called it the Purolator, a portmanteau of pure oil later .[1] This was a bypass filter: most of the oil flowed directly from the oil pan to the engine's working parts, and a smaller proportion of the oil was sent through the filter via a second flow path in parallel with the first. The oil was thus filtered over time. Modern bypass oil filter systems for diesel engines are becoming popular in consumer applications, but have been in commercial use for some time due to potential reduction in maintenance costs.[2][3][4]
Most pressurized lubrication systems incorporate an overpressure relief valve to allow oil to bypass the filter if its flow restriction is excessive, to protect the engine from oil starvation. Filter bypass may occur if the filter is clogged or the oil is thickened by cold weather. The overpressure relief valve is frequently incorporated into the oil filter. Filters mounted such that oil tends to drain from them usually incorporate an anti-drainback valve to hold oil in the filter after the engine (or other lubrication system) is shut down. This is done to avoid a delay in oil pressure buildup once the system is restarted; without an anti-drainback valve, pressurized oil would have to fill the filter before travelling onward to the engine's working parts. This situation can cause premature wear of moving parts due to lack of oil in the meantime.
High efficiency oil filters are a type of bypass filter that are claimed to allow extended oil drain intervals.[4] HE oil filters typically have pore sizes of 3 micrometres, which studies have shown reduce engine wear.[10] Some fleets have been able to increase their drain intervals up to 5-10 times.[11]
The Ea ByPass Oil Filter (EaBP) provides the best possible filtration protection against wear and oil degradation. Working in conjunction with the engine
Bypass Oil Filter Images
