DuPont™ Vespel® SP bushings in new EGR (Exhaust Valve Recirculation) valve help deliver environmental improvements
Taiho selects DuPont™ Vespel® bushings for a new EGR valve.
Precisely controlled EGR valves are a critical component for achieving strict new emission standards for diesel engines. Vespel® bushings are helping to achieve these new levels of performance - in hot, dirty environments - by acting as the critical bearing surface in a new control - arm linkage designed by Taiho.
Vespel® bushings help achieve emission standards
Vespel® SP parts maintain consistent performance over the life of the EGR valve despite operating in a very aggressive environment. The long-term dependability of the bushing helps ensure compliance to new emission standard
Materials Selected and Why
Excellent heat resistance, wear performance and self-lubrication
Vespel® bushings offer an excellent combination of properties including:
- High-heat resistance
- Low levels of wear
The lack of a melting point or Tg enables Vespel® SP bushings to survive the high temperatures found near the engine and exhaust system. The self-lubricating characteristic allows the bushing to perform without lubrication even when exposed to the dirt and contamination found in the engine compartment – an almost impossible task for a metal bushing. The low-wear performance provides predictable, precise control of the EGR over the life of the component.
Click here to view a PDF of the case study.