EVALUATION METHOD FOR A SHIFT FEELING OF A VEHICLE

• US 20140088789A1
• Filed: 12/12/2012
• Published: 03/27/2014
• Est. Priority Date: 09/24/2012
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: JEON, Byeong Wook
• Granted Patent: US 9,128,814 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 30/19 Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: B60W 40/12 related to parameters of the vehicle itself , e.g. tyre models
• CPC Class Codes: F16H 59/20 Kickdown
• CPC Class Codes: F16H 61/04 Smoothing ratio shift
• CPC Class Codes: G06F 17/00 Digital computing or data processing equipment or methods, specially adapted for specific functions information retrieval, database structures or file system structures therefor G06F16/00

Abstract

An evaluation method for a shift feeling of a vehicle, through which the shift feeling during a kick down operation of a driver is deduced as objectively quantitative value, it may be applied to a proper shift control corresponding to an expectancy of a driver based on the quantitative value.

Claims

1. An evaluation method for a shift feeling of a vehicle comprising:

a measurement factor detecting step for detecting a total six measurement factors of an initial acceleration response time X₁, a final acceleration arriving time X₂, an average acceleration maintaining amount during a predetermined time period after arriving a maximum acceleration X₃, an acceleration rising slope X₄, an initial maximum jerk X₅ and an end maximum jerk X₆, from front and rearward acceleration signal of a vehicle;

a sensor factor calculation step for calculating a major four sensory factors of a responsiveness, a strength, a smoothness and an unperceivable by multiplying the six measurement factors by different arithmetic coefficients, respectively, and summating them;

and a sensory score calculation step for obtaining a total sensor score by multiplying the four major sensory factors by different weighted values, respectively and summating them.

2. The evaluation method for a shift feeling of a vehicle of claim 1, wherein each of the sensor factor calculation step and the sensor score calculation step is performed per a sporty kick down and a mild kick down of a driver wherein the sporty kick down and the mild kick down are sorted by a variation of accelerator pedal sensor signal as time lapses.

3. The evaluation method for a shift feeling of a vehicle of claim 2, wherein when a variation of the accelerator pedal sensor signal per time exceeds to 250%±

50%/sec, it is determined as the sporty kick down, and when it is 250%±

50%/sec or less, it is determined as the mild kick down.

4. The evaluation method for a shift feeling of a vehicle of claim 2, wherein among the four major sensory factors, the responsiveness indicate whether a vehicle responds as rapidly as a driver'"'"'s willing, the strength indicates whether a power feeling is enough when the vehicle accelerates, the smoothness indicates whether an acceleration rising is smooth, and the unperceivable indicates whether there is no unpleasant vibration when a vehicle accelerates.

5. The evaluation method for a shift feeling of a vehicle of claim 2, wherein among the six measurement factors, the initial acceleration response time X₁ is a time required T₁ from an acceleration at a tip-in time point where a driver steps down an acceleration pedal to a time point where the acceleration is increased to a predetermined rate, the final acceleration arriving time X₂ is a time required T₂ from the tip-in time point of a driver to a time required to arrive a maximum acceleration, the average acceleration maintaining amount during a predetermined time period after arriving a maximum acceleration X₃ is an acceleration average value G₁ for a predetermined time period after arriving the maximum acceleration, the acceleration rising slop X₄ is an acceleration slope G from T₁ to T₂, the initial maximum jerk X₅ is a first effective peak jerk after tip-in of a driver, and the end maximum jerk X₆ is an effective peak jerk after T₂.

6. The evaluation method for a shift feeling of a vehicle of claim 5, wherein the predetermined rate at which the acceleration increases from the acceleration at the tip-in time point, which is necessary to determine the initial acceleration response time X₁, is a range of 0.02±

0.01 of the acceleration at a tip-in time point, and the predetermined time period, which is necessary to determine the average acceleration maintaining amount X₃ during a predetermined time period after arriving a maximum acceleration is a range of 0.5±

0.2 sec after 150±

50 ms after arriving the maximum acceleration.

7. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 1.

8. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 2.

9. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 3.

10. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 4.

11. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 5.

12. An electronic control unit for implementing the evaluation method for a shift feeling of a vehicle according to claim 6.