[특허]Wheel understeer speed control

Wheel understeer speed control 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-005/46 B62D-011/02
출원번호	US-0720071 (1991-06-24)
발명자 / 주소	Ghoneim Youssef A. (Mt. Clemens MI) Chin-Woei Lin William (Troy MI)
출원인 / 주소	General Motors Corporation (Detroit MI 02)
인용정보	피인용 횟수 : 42 인용 특허 : 0

초록 ▼

An apparatus provides improved vehicle handling during turning maneuvers by providing control of vehicle understeer. The understeer control includes determining a desired turning radius for the vehicle, a corresponding ideal outer to inner wheel speed ratio. A closed loop torque command is determined in proportion to the difference between the ideal wheel speed ratio and the actual wheel speed ratio. The closed loop torque command is used in conjunction with an open loop torque command responsive to operator power demand to provide wheel speed control in a manner to maintain the desired vehicle understeer characteristics.

대표청구항 ▼

An improved vehicle steering control apparatus comprising: means for measuring an angle of a steering wheel positionable by a vehicle operator and for supplying a steering angle signal as an indication of the steering wheel angle; means for determining operator desired output torque and, in response thereto, for supplying a desired output torque signal; means for measuring wheel speeds of at least one inner wheel that is driven by means for supplying motive force and at least one outer wheel that is driven by the means for supplying motive force, the wheel speed measuring means supplying a wheel speed signal wi for each driven inner wheel and supplying a wheel speed signal wo for each driven outer wheel; means for determining an open loop torque command in response to the desired output torque signal; means for determining vehicle speed and for supplying a vehicle speed signal; means for determining a desired turning radius, Rd, in response to the vehicle speed signal and the steering angle signal and for supplying, as an indication of Rd, a desired turning radius signal; means for determining a desired outer wheel speed to inner wheel speed ratio signal, D, in response to the wheel speed signals; means for determining a closed loop torque command for each driven wheel in response to (i) a previously determined closed loop torque command, (ii) the steering angle signal, (iii) the desired outer wheel speed to inner wheel speed ratio signal, and (iv) the wheel speed signals, such that the closed loop torque commands equal zero if the steering angle signal indicates a steering angle of less than a predetermined threshold value, dth, and such that the closed loop torque command for each driven outer wheel is zero and the closed loop torque command for each driven inner wheel is proportional to (D-wo/wi) if the indicated steering angle is greater than dth; and means for driving each of the driven wheels at an output torque equal to a sum of (i) torque indicated by the open loop torque command and (ii) torque indicated by the closed loop torque command for that wheel, whereby vehicle understeer is controlled to a desired level, improving vehicle handling during turning maneuvers.

이 특허를 인용한 특허 (42)

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Olson Douglas J., Steering control system for articulated vehicle.
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Naik, Sanjeev M., Torque distribution for multiple propulsion system vehicles.
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Eavenson, Sr., Jimmy N.; Woodrum, Adam; Prybor, Jonathan, Utility vehicle.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Wheel understeer speed control 원문보기

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Wheel understeer speed control 원문보기

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이 특허를 인용한 특허 (42)

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