加油口盖技术介绍

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Pin (Nylon 6/6)
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Grommet (Nylon 6/6)
Cover (Nylon 6/6) Tether (Nylon 6/6) Loss Motion Torsion Spring (302 SS) Race (Acetal) Filter (Acetal/Nylon Cloth) Housing (Acetal) O-Ring (NBR+PVC or FKM)
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Diesel & Gas Designs
– External geometry is the same design. – Internal pressure and vacuum springs have different loads to meet specific leak and flow requirements.
• O-Ring Seal to Housing
• O-Ring Seal to Housing
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Leak Requirements
– – @ -15.0 kPa, leak < 3 ccm @ 11.2 kPa, leak < 10 ccm Confidential
• Valve Sealing Contact Areas
Break-Away Groove on Housing
Confidential
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15
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Main Seal Geometry
V – Shape Design
C – Shape Design
The change from V to C shape allows for more compression of the gasket and increased the performance during high temperature conditions, by using the geometry for more flexibility.
Confidential
5
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Vacuum & Pressure Valves in Sealed Position
• O-Ring Seal to Housing
• O-Ring Seal to Housing
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Leak Requirements
– – Gas
• • @ -15.0 kPa, leak < 3 ccm @ 11.2 kPa, leak < 10 ccm @ -1.0 kPa, leak < 10 ccm @ 11.0 kPa, leak < 10 ccm
• Quick-on Closure Caps & Cap-less
– 31 patents and 5 pending patents
• Stant closure cap technology is licensed to other import cap manufacturers
Confidential
Diesel
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• Valve Sealing Contact Areas
Confidential
6
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Vacuum Relief Air Flow Path
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Flow Requirements
– – Gas
• @ -19.0 kPa, flow > 6 LPM
@ -5.5 kPa, flow > 10 LPM
Cover (Nylon 6/6) Tether (Nylon 6/6) Loss Motion Torsion Spring (302 SS) Race (Acetal) Filter (Acetal/Nylon Cloth) Valve Cover (304 SS) Pressure Spring (302 SS) Seal Plate (304 SS) P/V Seal (FKM or NBR) Vacuum Valve (Acetal) Vacuum Spring (302 SS) Housing (Acetal) O-Ring (NBR+PVC) Retainer (Nylon 6/6)
Rib on Cover
Positive Stop on Race
Torsion Spring
Confidential
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14
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Break-Away Feature
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Utilized for both Gas and Diesel Applications
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Allows upper construction of the fuel cap to break-away from the filler neck and leave the housing to seal the fuel system during vehicle crash. U.S. Patent 4678097.
Teeth of race
Torque arms of housing
Confidential
13
13
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Loss Motion Feature
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Per Full Thread CTS 1.3.1.
– – – As the cover is rotated 90°, the ribs of the cover make contact with the race driving the housing from the filler neck and the torsion spring is loaded allowing the cover to return after the fuel cap is installed to the filler neck. Provides crash protection to the fuel system by allowing the vehicle body panels to rotate the cover 90° without un-camming the fuel cap. U.S. Patent 5449086 and 5395004.
Chlorination , Molycoat
RFN
• Chlorination – surface hardness the nitrile to remove the stickiness of the untreated material. • Molycoat – short term treat for friction on the main seal ( wears off and is mostly an assembly aid)and used on the valve seals to reduce valve sticking ( fuel washes the treatment off ). • RFN treatment ( Reduced Friction by Nanotechnology)- medias are chemically and mechanically bonded to the material to generate surface with low friction. • Other treatments • PTFE ( Teflon ) – has issues with wear. • ParkerSlick – improvement over PTFE, but still has wear issue.
2
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wk.baidu.com
Cap Design / Visual BOM Review
Confidential
3
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Fuel Cap Categories
• Full Thread Vacuum Only Gasoline
• Full Thread Vacuum Only E85
• Full Thread P/V Gasoline
• Full Thread P/V Diesel
Confidential
4
Threaded Pressure/Vacuum Gas & Diesel ® Fuel Cap Exploded BOM
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Pin (Nylon 6/6)
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Grommet (Nylon 6/6)
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Fuel Cap Training
May 2, 2012
Confidential
1
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Stant Technology
• Patents
– 127 active patent, 28 additional patents pending, including Carbon Canister technology
11
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Vacuum Relief Air Flow Path
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Flow Requirements
– @ -19.0 kPa, flow > 6 LPM Confidential
12
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Torque Over-Ride Feature
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Full Thread CTS 1.3.1
– – – – Provides audible feedback to customer upon reaching its full stop position. At the required torque, the torque arms of the housing slip past the teeth of the race. Allows for consistent installation force for improved seal performance of the fuel cap. U.S. Patent 5110003.
Diesel
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Confidential
7
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Pressure Relief Air Flow Path
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Flow Requirements
– – Gas
• @ 20.0 kPa, flow > 220 LPM
@ 17.0 kPa, flow > 1 LPM @ 18.0 kPa, flow > 160 LPM
Diesel
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Confidential
8
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Pressure / Vacuum Valve Function
New Style
Old Style Current Production
Retainer
Steel Cover
Vacuum Valve geometry optimized
• Vacuum Valve Optimized.
• • • • •
Confidential
Retainer (Nylon 6/6) Vacuum Seal (FKM) Vacuum Plate (304 SS) Vacuum Spring (302 SS) Vacuum Valve Retainer (Acetal)
10
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Vacuum Valve in Sealed Position
Confidential
16
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Main Seal Material & Treatments
Market Fuels Treatments
Material
Application
Nitrile
FKM
LEV II
PZEV - low perm
Standard Petrol, E10, E85, Diesel Standard Petrol, E10, E85, Diesel, BioDiesel
U – Shape Design
The change from V to U allows for even more compression of the gasket and even better performance during high temperature conditions, by using addition travel / flexibility while maintaining seal integrity.
– Guidance Increase – Sealing Diameter Increase – Spring Diameter and retention revised.
Confidential
9
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Threaded Vacuum Only Gas/E85 Fuel Cap Exploded BOM