Automotive vehicle control system for predicting road friction level
First Claim
1. A traction control system for an automotive vehicle, comprising:
- first means for adjusting a driving torque delivered to the driven wheels of the vehicle from an automotive internal combustion engine;
second means for detecting vehicular deceleration and acceleration and generating vehicular deceleration and acceleration indicative data;
third means for monitoring a torque transmitted between a road surface and said driven wheels, for generating transmitted torque magnitude indicative data;
fourth means for predicting road friction level on the basis of said vehicular deceleration and acceleration indicative data and said transmitted torque magnitude indicative data;
fifth means for deriving a torque criterion on the basis of said road friction level derived by said fourth means; and
sixth means, responsive to said transmitted torque magnitude indicative data greater than said torque criterion, for performing a control for said first means for adjusting the output torque of said engine and thereby adjusting said torque transmitted between said road surface and said driven wheels below said torque criterion.
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Accused Products
Abstract
A traction control system for an automotive vehicle housing device for adjusting the driving torque delivered to driven wheels from an automotive internal combustion engine, and sensor for detecting vehicular deceleration and acceleration for generating a vehicular deceleration and acceleration indicative data. The system also performs the functions of monitoring the torque transmitted between a road surface and the driven wheel, generating a transmitted torque magnitude indicative data, and predicting road friction level on the basis of the vehicular deceleration and acceleration indicative data and the transmitted torque magnitude indicative data. Based on the road friction level, the system derives a torque criterion on the basis of the raod friction level. The system performs traction control in response to the transmitted torque magnitude indicative data greater than the torque criterion.
40 Citations
20 Claims
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1. A traction control system for an automotive vehicle, comprising:
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first means for adjusting a driving torque delivered to the driven wheels of the vehicle from an automotive internal combustion engine; second means for detecting vehicular deceleration and acceleration and generating vehicular deceleration and acceleration indicative data; third means for monitoring a torque transmitted between a road surface and said driven wheels, for generating transmitted torque magnitude indicative data; fourth means for predicting road friction level on the basis of said vehicular deceleration and acceleration indicative data and said transmitted torque magnitude indicative data; fifth means for deriving a torque criterion on the basis of said road friction level derived by said fourth means; and sixth means, responsive to said transmitted torque magnitude indicative data greater than said torque criterion, for performing a control for said first means for adjusting the output torque of said engine and thereby adjusting said torque transmitted between said road surface and said driven wheels below said torque criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling driving torque delivery for driven wheels of an automotive vehicle for maintaining road/tire traction on the automotive vehicle at optimum level, comprising the steps of:
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detecting vehicular deceleration and acceleration for generating the vehicular deceleration and acceleration indicative data; monitoring a torque transmitted between a road surface and said driven wheels for generating a transmitted torque magnitude indicative data; predicting road friction level on the basis of said vehicular deceleration and acceleration indicative data and said transmitted torque magnitude indicative data; deriving a torque criterion on the basis of said road friction level derived; detecting said transmitted torque magnitude indicative data greater than said torque criterion, for deriving a control value for adjusting output torque of an automotive internal combustion engine and whereby adjusting said torque transmitted between said road surface and said driven wheels below said torque criterion; and
,adjusting driving torque delivered to said driven wheels from an automotive internal combustion engine based on said control value. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A system for predicting road friction comprising:
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means for detecting vehicular deceleration and acceleration for generating a vehicular deceleration and acceleration indicative data; means for monitoring a torque transmitted between a road surface and a driven wheel for generating a transmitted torque magnitude indicative data; and means for predicting road friction level on the basis of said vehicular deceleration and acceleration indicative data and said transmitted torque magnitude indicative data. - View Dependent Claims (19, 20)
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Specification