Driving evaluation method

• US 8,565,964 B2
• Filed: 08/26/2010
• Issued: 10/22/2013
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: Homs Engineering Inc.
• Original Assignee: Luna Co., Ltd.
• Inventors: Tanoue, Seiichiro, Higuchi, Hidefumi
• Primary Examiner(s): Jabr, Fadey
• Assistant Examiner(s): INGRAM, THOMAS P
• Application Number:
  US13/392,011
• Publication Number:
  US 20120221170A1
• Time in Patent Office: 1,153 Days
• Field of Search: 701/29.1, 701/32.1, 701/32.5, 701/33.4
• US Class Current: 701/33.4
• CPC Class Codes: B60R 16/0236 for economical driving
• CPC Class Codes: G09B 19/167 Control of land vehicles
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

Disclosed is a driving evaluation method capable of properly evaluating an efficient driving mode corresponding to road conditions by way of using energy efficiency as a main perspective of evaluation. The driving evaluation method, on the basis of motion data (S2) of a mobile body, calculates an evaluation index and performs driving evaluation, and is characterized in obtaining, from the motion data, evaluation indices A, B, D, and E, which are functions of an acceleration energy Ei injected into the mobile body and a motion distance Li of the mobile body and which have a positive correlation with either one of the acceleration energy or the motion distance and a negative correlation with the other.

Claims

1. A driving evaluation method for focusing on how much kinetic energy of a mobile body is converted into a traveling distance of the mobile body, and for calculating an evaluation index on the basis of motion data (S1, S2) of the mobile body to perform a driving evaluation, wherein

the evaluation index (A, B, D, E) is calculated, by a processor, from the motion data,

in which the evaluation index (A, B, D, E) is a function of acceleration energy (Ei) injected into the mobile body and a motion distance (Li) of the mobile body corresponding to the acceleration energy, and has a positive correlation with one of the acceleration energy and the motion distance and has a negative correlation with the other,

on the condition that the acceleration energy (Ei) and the motion distance (Li) are calculated for each of one or a plurality of moving segments (i), and wherein each of the moving segments (i) is the period from a start of the mobile body to a stop in a sequence of travel of the mobile body which includes repeated starting and stopping, and

the acceleration energy (Ei) is a sum of each acceleration energy (Eij) in each of the moving segments (i), and

each acceleration energy (Eij) is calculated by multiplying a mass of the mobile body (M) by a difference between a square of a final speed (Vbj²) and a square of an initial speed (Vaj²) through each acceleration region in each moving segment, (Eij=M*(Vbj²−

Vaj²)), and

the motion distance (Li) is a traveling distance of the mobile body corresponding to the each of the moving segments (i).

2. The driving evaluation method according to claim 1, wherein the evaluation index (A, B) is a function which is in proportion to or inverse proportion to the acceleration energy (Ei).

3. The driving evaluation method according to claim 1, wherein:

the evaluation index is an acceleration energy efficiency index (A) and

the acceleration energy efficiency index (A) indicates

a ratio of a kinetic energy (Emi) of the mobile body having an average moving speed (Vmi) in each of the moving segments (i), which is from a start of the mobile body to a first stop, to the acceleration energy (Ei) injected into the mobile body in each of the moving segments (i), or

an additional value or multiplication value of a positive or negative constant to the ratio,

on the condition that the kinetic energy (Emi) is calculated for each of the moving segments (i) and is calculated by multiplying the mass of the mobile body (M) by a square of the average moving speed (Vmi²) throughout each of the moving segments, (Emi=M*Vmi²).

4. The driving evaluation method according to claim 3, wherein

the acceleration energy efficiency index throughout a plurality of the moving segments is calculated by a sum of acceleration energy efficiency indices on the plurality of the moving segments which are weighted by motion distances of the mobile body in the moving segments as weighting factors.

5. The driving evaluation method according to claim 4, wherein the acceleration energy efficiency index (A) is calculated by using a motion distance correction factor (X_L) for reducing an influence of the motion distance (Li) on the acceleration energy efficiency index (A) at least in a range that the motion distance (Li) is equal to or longer than a predetermined value or at least in a range that the motion distance (Li) is equal to or shorter than the predetermined value.

6. The driving evaluation method according to claim 3, wherein the acceleration energy efficiency index (A) is calculated by using a motion distance correction factor (X_L) for reducing an influence of the motion distance (Li) on the acceleration energy efficiency index (A) at least in a range that the motion distance (Li) is equal to or longer than a predetermined value or at least in a range that the motion distance (Li) is equal to or shorter than the predetermined value.

7. The driving evaluation method according to claim 1 wherein

the evaluation index is an acceleration energy waste index (D) and

the acceleration energy waste index (D) indicates

a ratio of a difference value (Ei−

Emi) representing a difference between the acceleration energy (Ei) injected into the mobile body in each of the moving segments (i, and a kinetic energy (Emi) of the mobile body having an average moving speed (Vmi) in each of the moving segments (i), to one of;

(a) the motion distance (Li) of the mobile body in each of the moving segments (i), or

(b) a sum of the ratios when there is a plurality of the moving segments, or

(c) an additional value or multiplication value of a positive or negative constant to the ratio or the sum,

on the condition that the kinetic energy (Emi) is calculated for each of moving segments (i) and is calculated by multiplying the mass of the mobile body (M) by a square of the average moving speed (Vmi²) throughout each of the moving segments, (Emi=M*Vmi²).

8. The driving evaluation method according to claim 7, wherein the acceleration energy waste index (D) is calculated by using a motion distance correction factor (X_L) for reducing an influence of the motion distance (Li) on the acceleration energy waste index (D) at least in a range that the motion distance (Li) is equal to or longer than a predetermined value or at least in a range that the motion distance (Li) is equal to or shorter than the predetermined value.

9. The driving evaluation method according to claim 1, wherein:

the evaluation driving index (E) is a sum (C+D) of an acceleration energy waste index (D) and a sudden acceleration/deceleration index (C),

on the condition that the acceleration energy waste index (D) in one or a plurality of moving segments indicates

a ratio of a difference value (Ei−

Emi) representing a difference between the acceleration energy (Ei) injected into the mobile body in each of the moving segments (i), and a kinetic energy (Emi) of the mobile body having an average moving speed (Vmi) in the each of the moving segments (i), to one of;

(a) the motion distance (Li) of the mobile body, or

(b) a sum of the ratios when there is a plurality of the moving segments, or

(c) an additional value or multiplication value of a positive or negative constant to the ratio or the sum, and

the kinetic energy (Emi) is calculated for each of the moving segments (i) and is calculated by multiplying the mass of the mobile body (M) by a square of the average moving speed (Vmi²) throughout each of the moving segments, (Emi=M*Vmi²), and

on the condition that the sudden acceleration/deceleration index (C) in one or a plurality of the moving segments indicates

a sum of a sudden acceleration operation amount representing a ratio of an acceleration energy (Eij) injected in an acceleration region to an acceleration distance (Lij), and a sudden deceleration operation amount representing a ratio of a deceleration energy (Fij) ejected in a deceleration region to a deceleration distance (Lik), and

an additional value or multiplication value of a positive or negative constant to the sum of the sudden acceleration operation amount and the sudden deceleration operation amount.

10. The driving evaluation method according to claim 9, wherein the appropriate driving index (E) is calculated by using a motion distance correction factor (X_L) for reducing an influence of the motion distance (Li) on the appropriate driving index (E) at least in a range that the motion distance (Li) is equal to or longer than a predetermined value or at least in a range that the motion distance (Li) is equal to or shorter than the predetermined value.

11. The driving evaluation method according to claim 1, wherein the evaluation index is an acceleration energy consumption index (B) and

the acceleration energy consumption index (B) indicates

a ratio of the acceleration energy (Ei) injected into the mobile body to the motion distance (Li) of the mobile body, or

an additional value or multiplication value of a positive or negative constant to the ratio.

12. The driving evaluation method according to claim 11, wherein the acceleration energy consumption index (B) indicates

a ratio of the acceleration energy (Ei) to the motion distance (Li) in each of the moving segments (i), or

a sum of the ratios when there is a plurality of the moving segments, or

an additional value or multiplication value of a positive or negative constant to the ratio or the sum.

13. A driving evaluation method for focusing on how much kinetic energy of a mobile body is converted into a traveling distance of the mobile body, and for calculating an evaluation index on the basis of motion data (S1, S2) of the mobile body to perform a driving evaluation, wherein the period from a start of the mobile body to a stop in a sequence of travel of the mobile body which includes repeated starting and stopping defines one or a plurality of moving segments (i) and wherein

a sudden acceleration index (C1) or sudden deceleration index (C2) is calculated, by a processor, from the motion data,

on the condition that the sudden acceleration index (C1) indicates one of:

(a) a ratio of a sudden acceleration operation amount to a motion distance (Li) of the mobile body, or

(b) an additional value or multiplication value of a positive or negative constant to the ratio; and

the sudden acceleration operation amount represents

a ratio of an acceleration energy (Eij) injected to one or a plurality of acceleration regions in each of the of moving segments, to one of;

(c) an acceleration distance (Lij) corresponding to the acceleration energy, or

(d) a sum of the acceleration ratios when there is a plurality of acceleration regions in each of the moving segments, and

the sudden deceleration index (C2) indicates a ratio of a sudden deceleration operation amount to one of;

(e) the motion distance (Li) of the mobile body, or

(f) an additional value or multiplication value of a positive or negative constant to the ratio, and

the sudden deceleration operation amount represents

a ratio of a deceleration energy (Fij) ejected in one or a plurality of deceleration regions in each of the moving segments, to one of;

(g) a deceleration distance (Lik) corresponding to the deceleration energy, or

(h) a sum of the deceleration ratios when there is a plurality of deceleration regions in each of the moving segments, and

the acceleration energy (Eij), the acceleration distance (Lij), the deceleration energy (Fij), and the deceleration distance (Lik) are calculated for each of the moving segments (i), and

the acceleration energy (Eij) is calculated by multiplying a mass of the mobile body (M) by a difference between a square of a final speed (Vbj²) and a square of an initial speed (Vaj²) through each acceleration region in each of the moving segments, (Eij=M*(Vbj²−

Vaj²)), and

the acceleration distance (Lij) is a traveling distance of the mobile body corresponding to each acceleration region, and

the deceleration energy (Fij) is calculated by multiplying a mass of the mobile body (M) by a difference between a square of an initial speed (Vak²) and a square of a final speed (Vbk²) through each deceleration region in each of the moving segments, (Fij=M*(Vak²−

Vbk²)), and

the deceleration distance (Lik) is a traveling distance of the mobile body corresponding to the each deceleration region.

14. The driving evaluation method according to claim 13, wherein

the sudden acceleration index (C1), the sudden deceleration index (C2), or a sudden acceleration/deceleration index (C) is calculated,

on the condition that the sudden acceleration index (C1) indicates

a ratio of the sudden acceleration operation amount to one of:

(a) the motion distance (Li) in each of the moving segments (i), or

(b) a sum of the ratios when there is a plurality of the moving segments, and

the sudden deceleration index (C2) indicates

a ratio of the sudden deceleration operation amount to one of;

(c) the motion distance (Li) in each of the moving segments (i), or

(d) a sum of the ratios when there is a plurality of the moving segments, and

the sudden acceleration/deceleration index (C) indicates a sum of the sudden acceleration index and the sudden deceleration index.

15. A driving evaluation method for focusing on that how much kinetic energy of a mobile body is converted into a traveling distance of the mobile body, and for calculating an evaluation index on the basis of motion data (S1, S2) of a mobile body to perform a driving evaluation, wherein the period from a start of the mobile body to a stop in a sequence of travel of the mobile body which includes repeated starting and stopping defines a plurality of moving segments (i) and wherein

an acceleration/deceleration comparison index (G) is calculated, by a processor, from the motion data,

on the condition that the acceleration/deceleration comparison index (G) indicates

a ratio of a sudden acceleration operation amount to a sudden deceleration operation amount, or

an additional value or multiplication value of a positive or negative constant to the ratio, and

the sudden acceleration operation amount denotes

a ratio of an acceleration energy (Eij) injected in one or a plurality of acceleration regions in each of the moving segments, to an acceleration distance (Lij) corresponding to the acceleration energy, or

a sum of the acceleration ratios when there is a plurality of acceleration regions in each of the moving segments, and

the sudden deceleration operation amount denotes

a ratio of a deceleration energy (Fij) ejected in one or a plurality of deceleration regions in each of the moving segments, to a deceleration distance (Lik) corresponding to the deceleration energy, or

a sum of the deceleration ratios when there is a plurality of deceleration regions, in each of the moving segments, and

the acceleration energy (Eij), the acceleration distance (Lij), the deceleration energy (Fij), and the deceleration distance (Lik) are calculated for each of the moving segments (i), and

the acceleration energy (Eij) is calculated by multiplying a mass of the mobile body (M) by a difference between a square of a final speed (Vbj²) and a square of an initial speed (Vaj²) through each acceleration region in each of the moving segments, (Eij=M*(Vbj²−

Vaj²)), and

the acceleration distance (Lij) is a traveling distance of the mobile body corresponding to the each acceleration region, and

the deceleration energy (Fij) is calculated by multiplying the mass of the mobile body (M) by a difference between a square of an initial speed (Vak²) and a square of a final speed (Vbk²) through each deceleration region in each of the moving segments, (Fij=M*(Vak²−

Vbk²)), and

the deceleration distance (Lik) is a traveling distance of the mobile body corresponding to each deceleration region.