US Patent No: 5,430,652
Number of patents in Portfolio can not be more than 2000
Estimated vehicle body speed calculating apparatus
Stats
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Jul 4, 1995
Issued date -
Nov 12, 1993
filing date -
08/151,131
serial no -
Expired
status
Importance
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Abstract
The apparatus is composed of calculation of a vehicle wheel speed of each vehicle wheel for each of control cycles, calculation of tolerance maximum reduced speed amount approximately proportional to the .mu. value of the road surface by a wheel cylinder fluid pressure, judgement as to whether the vehicle wheel speed at this time is reduced in speed larger than the estimated vehicle body speed at the last time in the tolerance maximum reduced speed amount at the reduced speed time. When the reduced speed is much larger, a value reduced in the tolerance maximum reduced speed amount from the estimated vehicle body speed at the last time is made an estimated vehicle body speed at this time. On the other hand, when the reduced speed is much smaller, the vehicle wheel speed at this time is made an estimated vehicle body speed at this time.
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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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| 4,969,100 Wheel reference velocity calculation apparatus | 12 | 1988 | |
| 5,240,313 Estimated vehicle speed detection apparatus for motorcycles | 8 | 1991 | |
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| 4,991,910 Anti-lock control system for motor vehicles | 20 | 1988 | |
| 4,982,806 Anti-lock control system for motor vehicles | 10 | 1990 | |
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| 4,439,832 Method and apparatus for controlling an anti-skid brake system | 22 | 1981 | |
| 4,787,682 Method of estimating vehicle speed | 24 | 1987 | |
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| 5,210,690 Anti-skid control system for vehicle | 17 | 1991 | |
| 5,246,279 Anti-skid brake system for an automotive vehicle including brake force control | 5 | 1991 | |
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| 4,774,667 Brake control system for vehicle | 27 | 1986 | |
| 4,836,618 Brake control system for controlling a braking force to each wheel of a motor vehicle | 34 | 1987 | |
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| 5,185,703 Anti-lock control method for automotive vehicles | 4 | 1990 | |
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| 5,173,860 Reference speed determination for an antilock brake system | 12 | 1991 | |
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| 5,058,019 Vehicle speed estimation using wheel speed measurements | 12 | 1990 | |
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| 4,675,819 Method for the generation of a vehicle reference speed as a reference value for the control of brake slip and/or traction slip | 20 | 1984 | |
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| 5,033,799 Method of controlling the brake pressure in an antilock vehicle brake system | 10 | 1990 | |
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| 4,970,649 Anti-skid brake control system with projected vehicle speed derivation with variable gradient depending upon vehicular braking condition | 10 | 1988 | |