AirSpring. - Firestone

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41 E o "5 : Lc L ALe ',- Ahe- Ah c-' Extension Compression Deflection e L Rate is the slope of the tangent at the equilibrium position. For small increments of deflection, rate equals the load change per unit deflection. (The slope of the chord line through Lc and Le is parallel to the tangent at L for small deflections.) U K (Lc- Le)/(Ahc + Ahe) Where: K Rate (Load per unit deflection) L Load at compression travel Le Load at extension travel Ahc Height change, compression Height change, extension Ahe k U L Po (A) L Po (AD Where: Pg Gauge Pressure at L Pge Gauge Pressure at Le A Effective area at Lc Ae Effective area at Le setting Ahc Ahe- .5 inch U K- Po(A)- Poe(Ae) D Po -Pa-14.7 Poe Pae-- 14.7 Where: P Absolute Pressure at Lc Pe Absolute Pressure at Le 14.7 Atmospheric Pressure !i now using the polytropic gas law and n- 1.38
Where: Pal Absolute pressure at equilibrium position V Volume at equilibrium position V Volume at Lc V Volume at L substitutingD in a Pge PalkTT -14.7 now substitute in Il K Pgc(Ac)- Pe(Ae) Then, grouping terms, this becomes the general rate formula for air springs. .38 Ae/TTe 14.7(A Ae)
Page 1 and 2: World's Number 1 Air Spring.
Page 3: HISTORY In the early 1930's, the Fi
Page 7 and 8: Bumper. Usually, these are made of
Page 9 and 10: SUSPENSION RELATED TERMS Height Sen
Page 11 and 12: Although the two-ply air spring is
Page 13 and 14: U End Closure. This is made of stee
Page 15 and 16: Blind Nut. 3/8"-16 UNC thread x 5/8
Page 17 and 18: Clamp Ring. This ring is crimped to
Page 19 and 20: Nuts & Lock Washers. Included with
Page 21 and 22: D Piston. May be made of aluminum,
Page 23 and 24: iNSTALLATION Follow this technique
Page 25 and 26: The part description is shown in th
Page 27 and 28: The Maximum Rebound Height is the m
Page 29: Dynamic Characteristics at Various
Page 34 and 35: APPLICATION CONSIDERATIONS Obtainin
Page 36 and 37: 35 :ASTENER ''IGHTENING SPECIFICATI
Page 38 and 39: BASIC PRINCIPLES iNTRODUCTION The f
Page 40 and 41: 39 SPECIAL CNANG|S O SAT| Non-flow
Page 44 and 45: 43 ATURAE. REQU|NCY Since the air s
Page 46 and 47: T| R|IT|ONSH|P Balancing moments ab
Page 48: Polytropic Gas Law Dynamic Air Spri
Page 51 and 52: Then calculate the rate: K-Pal Ac c
Page 53 and 54: Line H entries are determined as fo
Page 55 and 56: Now calculate the values for Line D
Page 57 and 58: TRAILING ARM SUSPENSION CALCULAT|ON
Page 59 and 60: Note that with a given "B" dimensio
Page 61 and 62: Air Spring Rate: Ks 104.7 [74.75- 6
Page 64 and 65: SAMPLE CALCULATIONS USING A P|RSONA
Page 66 and 67: 65 (ib) (psig) (ib/in) spring pisto
Page 68 and 69: 67 Design Height Design piston Heig
Page 70 and 71: 69 Design Height Design piston Heig
Page 72 and 73: WARRANTY CONSIDERATIONS 71 iNTRODUC
Page 74 and 75: 73 LOOSE GIRDLE HOOP Appearance Or
Page 76 and 77: 75 Appearance Or Condition Hole rub
Page 78 and 79: 77 OVER-EXTENSION Appearance Or Con
Page 80: 79 CLEANING APPROVED METHODS Approv
Page 83: HISTORY In the early 1930's, the Fi

AirSpring. - Firestone

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