Road condition detector
Abstract
Abstract Translated from Japanese (57)【要約】 【目的】 車両の走行中に路面の滑りやすさを検出す る。 【構成】 スリップ率検出部1では前輪(駆動輪)速度 V F と後輪速度V R の差を、後輪速度V R で割ってスリ ップ率S RA を求める。変動巾演算部2は一定期間におけ るスリップ率の最大値と最小値との差である変動巾S H を求める。駆動力検出部3はエンジン状態からタイヤの 駆動力F TA を求める。第1の路面状態検出部4は、あら かじめ設定した特性を利用して、駆動力F TA とスリップ 率S RA を基に路面状態を推定し、第2の路面状態検出部 5は、あらかじめ設定した特性を利用して、駆動力F TA とスリップ変動巾S H を基に路面状態を推定する。路面 状態検出部6は、2つの検出部4,5の推定の組み合わ せに応じて最終的に路面状態を判定する。 (57) [Summary] [Purpose] To detect the slipperiness of the road surface while the vehicle is running. [Structure] The slip ratio detection unit 1 obtains a slip ratio S RA by dividing the difference between the front wheel (driving wheel) speed V F and the rear wheel speed V R by the rear wheel speed V R. The fluctuation range calculation unit 2 calculates the fluctuation range S H that is the difference between the maximum value and the minimum value of the slip ratio in a certain period. Ask for. The driving force detection unit 3 obtains the tire driving force F TA from the engine state. The first road surface state detection unit 4 estimates the road surface state based on the driving force F TA and the slip ratio S RA using the preset characteristics, and the second road surface state detection unit 5 sets the preset road surface state. Driving force F TA And the road surface condition is estimated based on the slip fluctuation range S H. The road surface state detection unit 6 finally determines the road surface state according to the combination of the estimations of the two detection units 4 and 5.
Inventors
- 👤 Masayoshi Ito
- 👤 政義 伊藤
- 👤 Maki Kaneko
- 👤 真樹 金子
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