APPARATUS AND METHOD ESTIMATING ROAD SLOPE OF VEHICLE
First Claim
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1. A method of estimating road slope of a vehicle, comprising:
- determining an offset value of a gravitational acceleration sensor;
determining a driving distance in a longitudinal direction of the gravitational acceleration sensor;
comparing a difference between a driving distance and the driving distance in the longitudinal direction of the gravitational acceleration sensor with a predetermined value;
estimating a road slope by using either a driving torque or the gravitational acceleration sensor based on a result of the comparison; and
controlling a shift of the vehicle according to the estimated road slope.
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Abstract
A method of estimating road slope of a vehicle may include determining an offset value of a gravitational acceleration sensor, determining a driving distance in a longitudinal direction of the gravitational acceleration sensor, comparing a difference between a driving distance and the driving distance in the longitudinal direction of the gravitational acceleration sensor with a predetermined value, estimating a road slope by using either a driving torque or the gravitational acceleration sensor based on a result of the comparison, and controlling a shift of the vehicle according to the estimated road slope.
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Citations
16 Claims
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1. A method of estimating road slope of a vehicle, comprising:
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determining an offset value of a gravitational acceleration sensor; determining a driving distance in a longitudinal direction of the gravitational acceleration sensor; comparing a difference between a driving distance and the driving distance in the longitudinal direction of the gravitational acceleration sensor with a predetermined value; estimating a road slope by using either a driving torque or the gravitational acceleration sensor based on a result of the comparison; and controlling a shift of the vehicle according to the estimated road slope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for estimating road slope of a vehicle, comprising:
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a data detector configured to detect data for a shift control; and a controller configured to determine an offset value of a gravitational acceleration sensor and a driving distance in a longitudinal direction of the gravitational acceleration sensor based on the data, determine whether the vehicle drives procedure on a chassis dynamometer by comparing a driving distance with the driving distance in the longitudinal direction of the gravitational acceleration sensor, and estimate road slope by using either a driving torque or the gravitational acceleration sensor depending on the driving procedure on the chassis dynamometer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification