Ackerman-Jantou theory - Ackerman-Jantou theory

Japanese: アッカーマン=ジャントゥの理論 - あっかーまんじゃんとぅのりろん
Ackerman-Jantou theory - Ackerman-Jantou theory

...In this case, the geometric condition for preventing lateral slippage in each tire is to set the steering angles of the inner and outer front wheels (the steering angle of the inner wheel should be greater than that of the outer wheel) so that the intersection of the extensions of the inner and outer wheel axes of the front wheels is on the extension of the rear axle. This is called the Ackermann theory or the Ackermann-Jantou theory, but in reality, this relationship cannot be satisfied over the entire steering angle. Also, to ensure proper straight-line running while driving, return after steering, and steering force, the front wheels are given caster angles, camber angles, kingpin inclination angles, and toe-in as shown in Figure 5, and these are called front wheel alignment or front wheel alignment. ...

*Some of the terminology that refers to the Ackerman-Jantou theory is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この場合,各タイヤに横すべりが生じないための幾何学上の条件は,前輪の内側と外側の車輪軸の延長線の交点が,後車軸の延長線上にくるように,前輪の内外輪のかじ取角を設定(内輪のかじ取角を外輪より大きくする)すればよい。これをアッカーマンの理論またはアッカーマン=ジャントゥの理論というが,実際には全かじ取角にわたってこの関係を満足させることはできない。また走行中の直進性や操舵後の戻り,操舵力を適切にするため,前輪には図5のようにキャスター角,キャンバー角,キングピン傾斜角,トーインが与えられており,これらを前輪のアライメントまたは前輪の整列と呼んでいる。…

※「アッカーマン=ジャントゥの理論」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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