United States Patent 7,363,138
“Wheel slip detection and torque management”
【分析】
(1) 自動車の制御に関する技術。方法クレームとして発明をカバーしている。
(2) ”detect”、”compare”、”reduce”の流れで時系列に処理を規定している。発明のresultまでクレームで規定している（発明の有用性を主張できるようにしている）。
(3) 権利範囲を広くするため、”at least one of”の用語を効果的に使っている。
(4) 装置クレームに関しても、起草可能か考察すること。
(5) “least-square approach”:最小二乗法
1. A method of controlling traction in a vehicle having at least one non-driven wheel speed sensor,
the method comprising:
detecting at least one of actual vehicle acceleration and a wheel speed difference;
comparing said at least one of said actual vehicle acceleration and said wheel speed difference to at least one of a predetermined vehicle acceleration and a predetermined wheel speed difference to detect vehicle wheel slip; and
reducing wheel torque in response to said detected wheel slip based upon vehicle acceleration using a least squares approach or a wheel speed difference;
said method further comprising:
comparing a non-driven wheel speed to a threshold non-driven wheel speed value and trans throttle value to a threshold throttle value to obtain a comparison result; and
selecting a wheel slip detection method based on said comparison result.
2. The method of claim 1 wherein said comparing step further includes:
detecting a wheel speed acceleration; and comparing said wheel speed acceleration to a predetermined wheel speed acceleration to detect wheel slip.
3. The method of claim 1 further comprising:
specifying a transmission speed ratio based on a current vehicle speed; and
providing a line pressure in the transmission based on the specified speed ratio.
[TY(弁理士)]
