Exhaust Valve End of Line Test

Diesel engine vehicles are equipped with specialized valves including EPM valves which act as exhaust brakes by controlling back pressure into the engine, and EGR valves which reduce emissions by re-circulating exhaust gasses.

To perform end of line test on a new range of valves the manufacturer wanted to replace their existing test rigs, which used high volume air pressure to replicate engine operating conditions. This required a large air reservoir and compressor installation which was not only expensive to operate but also occupied a large area of the manufacturing site.

New test rigs that use a low volume pneumatic system were designed with the mechanical assembly of the rigs carried out by the customer and Tascomp developing the PC based control and monitoring system.

Each valve is tested during manufacture. The valve movement is monitored as air is passed through the test piece in a sequence precisely controlled by the system. It also records the test data and validates each test, automatically passing or failing each valve tested. Test criteria include stiction of moving parts, fully closed flap leakage, quick release and modulation force tests.

A single page “Proof of Process” report provides accurate test data and traceability for every valve shipped.

The success of the new system has allowed the decommissioning of the original air reservoir and compressor not only significantly reducing running costs but also freeing up valuable extra space at their manufacturing facility.

If you would like advice on a test project contact us.