US Patent No: 5,924,518
Number of patents in Portfolio can not be more than 2000
Linear drive electric assist steering system
Stats
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Jul 20, 1999
Issued date -
Jul 24, 1996
filing date -
08/686,089
serial no -
Expired
status
Importance
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Abstract
An electric power assist steering system (10) includes a pinion gear (102) supported for rotation in a motor housing (30). The pinion gear (102) is operatively connected to a steering wheel (12) of the vehicle through a torsion bar (106). A linear electric assist motor (17) is located in the housing (30). The motor (17) includes a stator (122) fixed to the motor housing (30) and a slider (124) supported for linear movement relative to the housing. Rack teeth (180) are disposed on the slider (124) in meshing engagement with the pinion gear (102). The system (10) further includes a torque sensor (110) for providing a torque signal in response to the sensed applied steering torque. A controller (186) provides a control signal in response to the torque signal and actuates the motor (17) to effect linear movement of the slider (124). Steering linkage members (18, 19, 20, 21) connect the slider (124) of the motor (17) to steerable wheels (22, 24) of the vehicle.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,729,067 Method and apparatus for closed loop position control in a linear motor system | 17 | 1995 | |
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| 4,653,602 Electric motor driven rack and pinion steering gear with take-off from axially slidable nut | 12 | 1985 | |
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| 5,685,390 Electrically-operated power steering apparatus | 19 | 1995 | |
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| 4,785,901 Rack and pinion steering gear with electric power assistance | 15 | 1987 | |
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| 5,040,631 Rack and pinion auxiliary steering mechanism, especially for motor vehicles | 9 | 1989 | |