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Vespel® - Transportation Applications

DuPont™ Vespel® Thrust Washer Adopted in 7-Speed AT for Rear Drive Vehicles

Thinner, lighter Vespel® SP-21D thrust washers replace all-metal
needle bearings in a new 7-speed AT for rear-drive vehicles

Vespel® thrust washers have been selected to replace larger and heavier metal thrust needle bearings positioned between the clutch casing and aluminum transmission housing.

 

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DuPont™ Vespel® Bushings Adopted for EGR Valve

Taiho selects DuPontTM 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.

 

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DuPont™ Vespel® Polyimide Bushings Support Precise Control of EGR Valves

Gustav Wahler uses DuPont™ Vespel® TP polyimide bushings to position
and guide cylindrical operating rods of EGR (Exhaust Gas Recirculation)
slip-in valves. The valves are used in four and six cylinder stratified-
charged gas engines. Located behind the pre-catalytic converter and
operating at temperatures of up to 200°C, the valves regulate the quantity
of exhaust gas re-circulated into the combustion air to reduce NOx
emissions.

 

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Maintenance-free thrust washers

Thrust washers made of DuPont™ Vespel® polyimide provide axial support to metal transmission components running at different speeds and help compensate for their relative rotary movements.

 

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MINI Autos Stay on the Go With Vespel® for CVT Sealing Rings

High reliability, light weight and low assembly costs come with sealing rings made of DuPont™ Vespel® SP polyimide in a continuously variable transmission (CVT).

 

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Thrust plugs for rear windshield wiper motor

Thrust plugs for rear wind-shield wiper motor to take the axial load from the worm gear.

 

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Ignition distributor coupling and rubbing block

Ignition distributor coupling and rubbing block for mechanical ignition distributor to actuate breaker points.

 

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Ford tractors use Vespel® parts in gearbox

Thirty-seven Vespel® polyimide parts serve as wear pads, thrust washers and seal rings in a new top-of-the-line 16x16 gearbox for Ford New Holland mid-size tractors.

 

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Rings, stepped bushings, and orifice plates for forklifts and other equipment

In carburetors for propane- and natural-gas-fueled engines for forklifts and other equipment, Vespel® polyimide parts have improved wear resistance and vehicle emissions in replacing phenolics for rings, stepped bushings and orifice plates. In 100,000 mile durability tests, the phenolic parts wore rapidly against aluminum, causing overly rich fuel mixtures and excessive exhaust emissions.

 

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Windowlift Motor Saves Weight, Works More Efficiently

Windowlift motors installed in Ford cars are a design made with seven DuPont polymers. The motor gear housing, injection molded from Zytel® HTN high performance polyamide resin, marks a major shift away from traditional die-cast aluminum housings.

 

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Vespel® seals improve transmission reliability

Seal ring for CVT (continuously variable transmission).

 

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Excellent heat and wear resistance of Vespel® parts result in reliability and lower weight

Thrust plugs made out of Vespel® polyimide are used in ITT’s powerful, reliable and economic automotive rear windscreen wiper motor (SW3P). Gears made from Delrin® acetal resin also feature in this application.

 

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Heat-Resistant Thrust Washers Help Keep 4WD Trucks Rolling

New Venture Gear Inc. selected Vespel® polyimide for 14 thrust washers in its robust new four-wheel-drive transfer case for light trucks after comparative testing of polyetheretherketone and Vespel® parts. The case is rated for trucks with gross vehicle weights from 8,800 to 17,500 lbs (3,992 to 7,938 kg).

 

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Low wear and high reliability for automotive pedal sensors

Over-moulded bushings for gas pedal sensor used in almost all Mercedes passenger cars.

 

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Increased reliability with Vespel®

Closing flap guide bushing for Exhaust Gas Return system (EGR).

 

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Vespel® significantly helps increase performance and life span of transmissions

Seal rings and thrust washer used in B13 and B41 transmissions for Renault Agriculture Ceres and Ergos tractors.

 

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Much better sealing and assembly with seal rings of Vespel®

Sealrings (7) for automatic DP0 and AL4 transmissions located at the accumulator, the oil pump shaft and the hydraulic lock-up system areas.

 

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