10 Years of ULTRAFLEX Technologies - VDI - 22 january 2015
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10 Years
of ULTRAFLEX Technologies
VDI - 22 january 2015
TOPICS • Challenges in AG tires Technology • What is Ultraflex Technology • Impact on yield and vehicle performances • Next challenges
Challenges for
agricultural tires
Ref fichier/sujet: Auteur/Sce: Classification: D3 Conservation : WA Date de création : 17/12/2014
Conf. VDI 23/1/15 P.Vervaet
Michelin AG R&D : Market context and trends
Michelin AG R&D : Market context and trends
• Productivity : increase of loads, speed, power, tool size
• Simplification of the practices, No Tillage…
• Genetics
• Window to do the job
• Autonomous machines
John DEERE – MICHELIN Author: MICHELIN LPAG Classification: D2 Conservation : WA Date : 2014-02-25 5
Bringing Value Through Tires :
GAIN = ECONOMY X 13
Produce more yield per surface of land
+ 5%
Compared to standard tyre
Yield through more fertile soils (compaction)
Prépare, seed, spray and harvest at the optimum
Vehicle
time and the optimal speed thanks to improved
Productivity productivity (traction, load capacity)
- 5% Spare fuel through better efficiency of the tire
ECONOMIY
Par rapport à un Fuel
pneu moyen (traction, slippage, rolling resistance)
- 10% Tire Change tire less often : wear, puncture resistance, ….
Par rapport à un
pneu moyen
Case of a cereal farm in France
(220 ha)
The Way to Ultraflex
Technology
Ref fichier/sujet: Auteur/Sce: Classification: D3 Conservation : WA Date de création : 17/12/2014
Conf. VDI 23/1/15 P.Vervaet
Evolution of tyres related to tractors
Engine power kW
Weight of the tractor
Tire pressure Bar Engine power kW
Radial Weight of the tractor
Large
series
Tire pressure Bar
1. HP / weight ratio decreased
2. Tyres dramatically changed
FB/LM/HC le 24 juin 11
Year Confidentiel D2 Conservation
AR
1st STEP : RADIAL TECHNOLOGY
Michelin invented radial in 1946 and propose its first agricultural
radial tire in 1970 , bringing further tire performances: fuels
saving, less compaction, better productivity, longevity, and
comfort.
diagonal radial
Std S.70 S.65
2nd STEP : WIDER TIRES
Standard S.70 S65 Ultraflex
Dimension 520/85 R38 580/70 R38 650/65 R38 XéoBib
(1,85 m – AgriBib OmniBib MultiBib
38’’)
Load at 2485 kg. 2720 kg. 2955 kg. 3960 kg.
1bar
P. for 1,6 b 1,4 b. 1,25 b. 0.8 b.3rd STEP : ULTRAFLEX - Improved Flexure
The package of technologies
Flat crown
• The MICHELIN Ultraflex
casing is sturdy and flexible Persistent rubber compound
at the same time.
• The casing accepts a lower Reinforced shoulders
tyre pressure – without
limiting endurance or load
capacity. Very high flexing capacity
• The tyre`s sidewalls feature a
very high flexing capacity.
The result: a larger footprint
and more contact to the soil.
MICHELIN Ultraflex Technologies Presentation 2011Michelin AG R&D : ULTRAFLEX
Constant pressure road & field, no bonus load for lower speed
Traction
Productivity Compaction
Load / Speed Low pressure
VF 650/60 R 38
65 Series
XeoBib
N&R
Geometric constraint +24%NEW NORMS FOR IMPROVED FLEXION TIRES : IF and VF
Std S.70 S.65
3rd STEP : FLEXIBLE TIRES
Standard S.70 S65 Ultraflex
Dimension 520/85 R38 580/70 R38 650/65 R38 IF650/60R38
(1,85 m – AgriBib OmniBib MultiBib XéoBib
38’’)
Charge à 2485 kg. 2720 kg. 2955 kg. 3900 kg.
1bar
P. Pour 1,6 b 1,4 b. 1,25 b. 0.8 b.2004 : solution for tractors
2014 : covering the whole agricultural cycle
MICHELIN MICHELIN
AxioBib XeoBib
For tractors For tractors
over from
220 hp 80 to 220 hp
MICHELIN
CerexBib MICHELIN
For harvesting SprayBib
machinery For sprayers
CargoXBib
For trailers
MICHELIN Ultraflex Technologies Presentation 2011Ultraflex on trailers
CargoXBib
For trailers
Pressures down to 0,8
bars
Adapted to CTISNEW PERFORMANCES A) SOIL COMPACTION
Result: Less soil compaction
The larger footprint distributes the pressure thus
reducing soil compaction and rutting.
MICHELIN Ultraflex Technologies Presentation 2011Trafic on agricultural soils
(studies with Harper Adams University)
Winter wheat in the Czech Rebublic
% of field covered by tyres footprint
in 1 year
Deep Tillage = 86%
Shallow Tillage = 65%
Zero Tillage = 45%
(Kroulík et al., 2009)
Field study at Harper Adams
UniversityResults 2013: Wheat Crop Yields
(studies with Harper Adams University)
8,2 + 2.6%
+ 5.5%
8,0 7,9
7,8 7,7 7,7
7,6
Yield (t/ha)
7,4 7,3
7,2
7,0
7,0 6,9
6,8
6,6
6,4
6,2
Deep Shallow Zero
Tillage (Wheel pass issue)
Random Traffic
Standard Farming
Ground Pressure Low Ground PressureOur commitment to help feeding the growing population
Continuous Progression of sales of Michelin Ultraflex Technology will
lead to significant improvement of yield by 2020
Corn from low compaction zone
Corn from high compaction zone
The increased yield will provide the
equivalent of an additional 1 million ha
during this period, the size of
Netherlands arable soilNEW PERFORMANCES B) LOAD CAPACITY
1,6bar
1,6bar
5600kg
5300kg
710/70R38 171D 710/70R42 173D
(1,96 m.) (2,08 m.)
5600kg 6700kg 7750kg
1,6bar 1,6bar
1,6bar
710/70R42 173D IF 710/70R42 179D VF 710/70R42 184DMICHELIN SPRAYBIB : Greater load capacity
Heavier load at same
40% heavier pressure compared to
standard tyre
Ex
Technolog Pressur
Sizes Load
y e
420/95 R
Standard 5150 kg
50
IF 420/95
3.6 b 6300 kg
R 50
VF 420/95 7,300
R 50 kgNEW PERFORMANCES C) FUEL EFFICIENCY
FUEL CONSUMPTION
1/3 of the power on the wheel goes to tyre or tyre/soil interaction
270
243
HP
90% Engine
207 Transmission Loss
85% Transmission HP
155 Motion Resistance Loss
75%
Tire Tractive HP
Efficiency
Ballasted Weight
6% 146 Slippage Loss 14000 kg
Slippage HP
Net Traction
Ratio
Max Traction 0,34
Speed 8,0 km/h
5,0 mph 4819 daN
BALLASTING RATIO 52 kg/HP eng. TRACTION POWER RATIO 54%
114 lb/HP eng.
61 kg/HP pto
134 lb/HP ptoTire energy dissipation : 3 sources
Road Caractéristique
Autres pertes pneu
véhicule
(transmission, clim,…) Perte Résistance Puissance dissipée par
Coef RR (Kg/T)
au Roulement déformation pneu
Pertes Pneu Résistance à
Puissance l'avancement
fournie par le
Puissance dissipée par
moteur Perte Compaction Coef Rsol (kg/T)
déformation sol
Puissance Utile
Puissance dissipée par
Perte Patinage Tx de glissement %
patinage
FieldGlobal efficiency
Slippage
Motion resistance
(internal dissipation in tyre + soil
deformation)FUEL CONSUMPTION
AG TYRES IN SOFT SOIL
%
270
243
HP
90% Engine
207 Transmission Loss
85% Transmission HP
155 Motion Resistance Loss
75%
Tire Tractive HP
Efficiency
Ballasted Weight
6% 146 Slippage Loss 14000 kg
Slippage HP
Net Traction
Ratio
Max Traction 0,34
Speed 8,0 km/h
5,0 mph 4819 daN
BALLASTING RATIO 52 kg/HP eng. TRACTION POWER RATIO 54%
114 lb/HP eng.
61 kg/HP pto
134 lb/HP pto
%NEW PERFORMANCES D) TRACTION POWER
Michelin AxioBib transfers the power to the
ground
0,9 bar 4642 cm² ( + 22 %)
Std : 1,2 bar 3813 cm²Traction / slippage tests
+ 15%
-15%FUTURE STEPS Our vision
Michelin AG R&D : Central Tyre Inflation System
CARRY TRANSPORT
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VF (constant pressure road – field)
CTIS : the good pressure at any timeCTIS
Possibility to express full benefits of ULTRAFLEX
Less time to go from field to road pressure
Complexity of pressure choice
SMART tire For continuous optimisation of tire performances
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