Search Results

This paper presents the rationale and underlying logic for automatic transmission filtration contaminant control (ATFCC). This approach relies upon an integrated filtration system as opposed to simply sandwiching in a piece of filter media or metal screen in the traditional transmission oil sump area. Most significantly, quantitative filtration system design and specification will result from implementation of a thorough ATFCC approach. A new transmission filter test procedure is also presented which closely represents the field operation of these types of filters. Test results are presented which compare the new test procedures results' with more traditional Multipass Filter test results.

Conventional practice is for automotive engine lubrication filter designers to include many devices in a typical “spin-on” filter. These include the filter element housing, tapping plate, and internal components, such as, an anti-drainback valve, the filter element structural support, the filter media and in some cases, the safety relief valve. Understanding the interaction of all these components before a prototype is built greatly aids in achieving a functional, cost effective solution to meet required flow and pressure drop, filtration efficiency, and contaminant capacity requirements for a particular filter. Furthermore, the investment in modeling a specific filter design enables variations or modifications to be made to the original design very easily and at little cost. This paper presents a detailed mathematical flow model that was developed for a new type of dual flow filter.

Used lube oil and transmission sump filters are not considered hazardous waste if they are disposed of according to Federal guidelines. The options for disposal after hot draining include incineration, landfilling, and recycling. Landfilling of filters increasingly have been banned by more and more states. The states are requiring that filters be recycled. The OEMs have acknowledged this governmental trend for life cycle recycling by their establishment of the Vehicle Recycling Partnership, one of the consortia of the United States Council on Automotive Research (USCAR). An all plastic transmission sump filter has been designed, developed, and is currently being manufactured for certain GM and Ford platforms. The use of a composite resin material and proprietary technology facilitates the effort to recycle. The recycled material may be used again when combined with virgin material to meet the OEM material specifications. Residual oil may also be recovered and reprocessed.