Apparatus for detecting wheel grip on road
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsKeiyu Kin, Yuji Sakaki
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Abstract
An apparatus for detecting a wheel grip on a road has a wheel speed sensor for detecting a revolution speed of a wheel of a vehicle, a plurality of band-pass filters for filtering an output of the wheel speed sensor at a plurality of frequency bands, and a reference value memory device for storing in memory reference values dependent on the revolution speed of the wheel. The reference values are set for each of the frequency bands of the plurality of band-pass filters. The wheel grip on road is detected based on the correlation between that signal output for each of the frequency bands which is obtained through the band-pass filters and that reference value for each of the frequency bands which is stored in memory in the reference value memory device.
Claims3
An apparatus for detecting a wheel grip on a road comprising:
- a wheel speed sensor for detecting a revolution speed of a wheel of a vehicle;
- a band-pass filter for filtering an output of said wheel speed sensor at a predetermined frequency band which varies with a vehicle speed;
- reference value memory means for storing in memory a reference value dependent on the vehicle speed, said reference value being set for the frequency band of said band-pass filter;
- and
- detecting means for detecting the wheel grip on the road based on a correlation between a signal output which is obtained through the band-pass filter and the reference value which is stored in memory in said reference value memory means.
Dependencies are inferred from the claim text.