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US 10,093,141 B2Granted
Method for simulating a deflection radius of a motor vehicle tire
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsJérémy Buisson, Teddy Virin
Life of this patent
Estimating the term…
Abstract
A method for producing a tire for a motor vehicle includes estimating a laden radius Rl of the tire using a formula having a form of: R l = R 0 - Fz Kzz + R V × V 2 - ( R Y 1 Pg + R Y 2 ) × Fy + R γ × γ , where KZZ has a form of: KZZ=KZZ 0+KZZp×Pg.
Claims11
A method for determining a behaviour of a tire to be produced for a motor vehicle, the method comprising steps of:
- (i) implementing within a software program of a simulation computer-processing tool a formula for estimating a laden radius Rl of the tire, the formula having a form of:
- R
- l
- =
- R
- 0
- -
- Fz
- Kzz
- +
- R
- V
- ×
- V
- 2
- -
- (
- R
- Y
-
-
- 1
- Pg
- +
- R
- Y
-
-
- 2
- )
- ×
-
- Fy
-
- +
- R
- γ
- ×
-
- γ
-
- ,
- where:
- KZZ has a form of:
- KZZ=KZZ 0+KZZp×Pg,
- KZZ0 and KZZp are numerical values,
- Pg is an inflation pressure of the tire,
- V is a speed of the vehicle,
- FZ is a load applied to the tire,
- FY is a transverse thrust force exerted on the tire,
- γ is a camber angle of the vehicle,
- R0 is a free radius value of the tire at rest,
- RV is a coefficient of influence of the speed of the vehicle on the laden radius,
- RY1 is a coefficient of influence of an inflation pressure on the laden radius via a value of a transverse load,
- RY 2 is a coefficient of influence of the transverse load on the laden radius without the part of the transverse load associated with the inflation pressure, and
- Rγ is a coefficient of influence of a camber angle value of the vehicle on the laden radius;
- (ii) determining values for Pg, V, FZ, FY, γ, R0, RV, RY1, RY 2, and Rγ to be used in the formula for estimating the laden radius Rl;
- (iii) estimating the laden radius Rl of the tire by executing the software program in the simulation computer-processing tool using the values determined in the step (ii);
- (iv) determining a predicted behaviour of the tire based on the laden radius Rl of the tire estimated in the step (iii);
- and
- (v) utilizing the predicted behaviour determined in the step (iv) to produce a tire having a predictable rolling behaviour.
58 more elements
A processor for determining a behaviour of a tire to be produced for a motor vehicle, the processor comprising:
- (i) programmed instructions for a formula for estimating a laden radius Rl of the tire by using a formula having a form of:
- R
- l
- =
- R
- 0
- -
- Fz
- Kzz
- +
- R
- V
- ×
- V
- 2
- -
- (
- R
- Y
-
-
- 1
- Pg
- +
- R
- Y
-
-
- 2
- )
- ×
-
- Fy
-
- +
- R
- γ
- ×
-
- γ
-
- ,
- where:
- KZZ has a form of:
- KZZ=KZZ 0+KZZp×Pg,
- KZZ0 and KZZp are numerical values,
- Pg is an inflation pressure of the tire,
- V is a speed of the vehicle,
- FZ is a load applied to the tire,
- FY is a transverse thrust force exerted on the tire,
- γ is a camber angle of the vehicle,
- R0 is a free radius value of the tire at rest,
- RV is a coefficient of influence of the speed of the vehicle on the laden radius,
- RY1 is a coefficient of influence of an inflation pressure on the laden radius via a value of a transverse load,
- RY 2 is a coefficient of influence of the transverse load on the laden radius without the part of the transverse load associated with the inflation pressure, and
- Rγ is a coefficient of influence of a camber angle value of the vehicle on the laden radius;
- (ii) programmed instructions for estimating the laden radius Rl of the tire by executing the programmed instructions of (i) using calculated or inputted values for Pg, V, FZ, FY, γ, R0, RV, RY1, RY 2, and Rγ;
- and
- (iii) programmed instructions for determining a predicted behaviour of the tire based on the laden radius Rl of the tire estimated using the programmed instructions of (ii),
- wherein the predicted behaviour determined using the programmed instructions of (iii) is used to produce a tire having a predictable rolling behaviour.
57 more elements
A tire for a motor vehicle, the tire being produced according to a design that takes into account results of a simulation method for determining a behaviour of the tire, the method comprising:
- (i) implementing within a software program of a simulation computer-processing tool a formula for estimating a laden radius Rl of the tire, the formula having a form of:
- R
- l
- =
- R
- 0
- -
- Fz
- Kzz
- +
- R
- V
- ×
- V
- 2
- -
- (
- R
- Y
-
-
- 1
- Pg
- +
- R
- Y
-
-
- 2
- )
- ×
-
- Fy
-
- +
- R
- γ
- ×
-
- γ
-
- ,
- where:
- KZZ has a form of:
- KZZ=KZZ 0+KZZp×Pg,
- KZZ0 and KZZp are numerical values,
- Pg is an inflation pressure of the tire,
- V is a speed of the vehicle,
- FZ is a load applied to the tire,
- FY is a transverse thrust force exerted on the tire,
- γ is a camber angle of the vehicle,
- R0 is a free radius value of the tire at rest,
- RV is a coefficient of influence of the speed of the vehicle on the laden radius,
- Ry1 is a coefficient of influence of an inflation pressure on the laden radius via a value of a transverse load,
- RY 2 is a coefficient of influence of the transverse load on the laden radius without the part of the transverse load associated with the inflation pressure, and
- Rγ is a coefficient of influence of a camber angle value of the vehicle on the laden radius;
- (ii) determining values for Pg, V, FZ, FY, γ, R0, RV, RY1, RY 2, and Rγ to be used in the formula for estimating the laden radius Rl;
- (iii) estimating the laden radius Rl of the tire by executing the software program using the values determined in the step (ii);
- (iv) determining a predicted behaviour of the tire based on the laden radius Rl of the tire estimated in the step (iii);
- and
- (v) utilizing the predicted behaviour determined in the step (iv) in the design so that the tire has a predictable rolling behaviour.
58 more elements
Dependencies are inferred from the claim text.