VEHICLE HEIGHT ESTIMATION DEVICE AND VEHICLE HEIGHT ESTIMATION METHOD

Title:

VEHICLE HEIGHT ESTIMATION DEVICE AND VEHICLE HEIGHT ESTIMATION METHOD

Document Type and Number:

WIPO Patent Application WO/2013/121569

Kind Code:

A1

Abstract:

The heights of vehicles can be inexpensively estimated by: detecting wheel speeds representing the speed of each wheel (step ST11); performing a frequency analysis of the detected wheel speeds of pairs of left and right wheels, and calculating the respective wheel speed characteristics of the left and right wheels at a gain-specific frequency (step ST12); calculating the difference in gain between the left and right wheel speeds on the basis of the calculated wheel speed characteristics of the left and right wheels (step ST13); and estimating the height of a vehicle on the basis of the correlation between the wheel heights with respect to the bodies of the wheels and values based the wheel speeds and a road surface inputs inputted from a road surface to the vehicle wheels (i.e., wheel speed/road surface input gain), and the difference in gain between the left and right wheel speeds (step ST14).

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Inventors:

YOSHIMI TSUYOSHI (JP)
KOUMURA SHINGO (JP)

Application Number:

PCT/JP2012/053726

Publication Date:

August 22, 2013

Filing Date:

February 16, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
YOSHIMI TSUYOSHI (JP)
KOUMURA SHINGO (JP)

International Classes:

B60G17/018; B60W40/12

Foreign References:

JPH0648139A	1994-02-22
JP2009040354A	2009-02-26
JPH06270643A	1994-09-27
JP2005510397A	2005-04-21
JP2005225339A	2005-08-25

Other References: