TYRES & CO 2 managing your tyres Managing tyres can - - PowerPoint PPT Presentation

Référence Document Auteur Département Création Date Classification D Conservation WA+1 Page 1

TYRES & CO2

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TYRES & CO2

• Burning diesel produces CO2
• Approx 2.63 kgs for every litre
• Approx 1/3 of fuel is used overcoming RR of tyres

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97 100 Speed (km/h) Vehicle resistive forces (%)

Internal vehicle friction (gear box, drive shaft, bearings, ...) Tire rolling resistance Aerodynamic forces

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TYRES & CO2 – managing your tyres

• Managing tyres can significantly reduce CO2 emissions
• Consider low RR tyres (Energy) tyres
• Right tyre for the job – Energy tyres don’t solve everything
• Pressures – correct pressures optimise wear, handling,

fuel consumption and, therefore, CO2 emissions

• Alignment – 10 of misalignment = approx 3% loss of fuel

efficiency

• Regrooving

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• A tyre’s rolling resistance decreases as it wears
• Therefore just before a tyre is removed from a vehicle it is
• perating in its most fuel efficient state
• By regrooving tyres they will continue to run longer when

they are at their most fuel efficient

TYRES & CO2 – regrooving

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TYRES & CO2 – regrooving

REGROOVING ENSURES THAT APPROX 40% OF TYRE LIFE IS SPENT AT THE HIGH MPG LEVEL !

EXAMPLE: MICHELIN X MULTI D

NEW Low MPG Med MPG Hi MPG NEW Low MPG Med MPG Hi MPG

23.5mm 300,000 kms

• 375,000 kms

2mm 2 225,000 kms 75,000 kms 0 kms

NEW + REGROOVE

Regroove Tyre + 3 mm

NEW New Tyre Tread Depth 17mm New Tyre Tread Depth 17mm

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TYRES & CO2 – regrooving

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TYRES & CO2 – regrooving

Rolling Resistance Calculation (Laden)

315/70 R 22.5 Axle No. Tread Pattern Axle Load (T) Rolling Res.(kg) Tread Pattern Axle Load (T) Rolling Res. (kg) 1 X Multi Z 6.700 36.18 X Multi Z RG 6.700 21.44 2 X Multi D 9.000 55.8 X Multi D RG 9.000 28.8 Calculated RR (Kg) 91.98

91.98

50.24

50.24

Calculated reduction in rolling resistance (kg): 41.74 X Multi RG v X Multi will reduce RR by 45.38% Approximate possible resultant fuel saving 15.13%

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TYRES & CO2 – regrooving

• If a 4x2 rigid does 11 mpg, that equates to 25.68 litres per

100 kms.

• 1000 kms = 256.8 litres
• 256.8 litres – 15% = 218.28 litres
• i.e. a saving of 38.52 litres OR

101.3 kgs of CO2 saved per 1000 kms

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TYRES & CO2 – regrooving

TEST MPG XZE2+/XDE2 REMIX 10.43 100.00% XZE2+RG/XDE2 RG 11.74 112.58%

IMPROVEMENT IN MPG OF REGROOVE ALL ROUND OVER NEW & REMIX 12.58%

Rigid (New vs. Regroove Combined)

100.00% 112.58% 90.00% 95.00% 100.00% 105.00% 110.00% 115.00% Michelin XZE2+/XDE2 Remix = 100% XZE2+/XDE2 REMIX XZE2+RG/XDE2 RG

Millbrook trial

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TYRES & CO2 – regrooving

• What percentage of tyres is regrooved?
• 1st life tyres returned for Remix
• 45.5%
• Remix tyres returned for Encore
• 41.5%
• That’s a lot of CO2 that is not being saved

Regrooving percentages

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THAN THANK K YOU OU FOR FOR LIST LISTENIN ENING