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Case Study

Automotive-filter maker, Parker Hannifin, tests PPSF prototype on V8 engine.


Parker Hannifin

Parker Hannifin turns to Stratasys Fortus FDM material to withstand testing.

Emissions filter takes the heat.

Parker Hannifin’s Racor division recently designed an emissions filter that enables diesel engine manufacturers to meet new emission requirements. The company used its Fortus FDM system to create a PPSF (polyphenylsulfone) prototype of the filter. The filter, called a crankcase vapor coalescer, was used for functional design testing.

Vibration affects filter efficiency, so it was important to mount the prototype directly on the engine for accurate testing.

The PPSF prototype was durable enough to mount directly on the valve cover of a 6.0-liter V8 diesel engine and test at various loads for 78 hours. “The prototype filter collected blow-by gases containing 160°F (71°C) oil, fuel, soot, and other combustion by-products,” says Racor senior development engineer Russ Jensen. “It withstood the operating environment and heat of the engine.” “Aside from some staining, the part appears to have the same strength and properties as when it was first assembled.

 

We never saw a leak from this assembly, and we were very pleased with its performance.” Racor was a Fortus beta-test site that helped prove out the capabilities of PPSF prior to its commercialization as a rapid prototyping material. Racor was interested in PPSF because it can handle heat near 400°F (204°C), it resists petroleum products, acids, and bases, and its strength is superior to other prototyping thermoplastics.

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