Method for determining a desired speed of a vehicle
AssigneeVolvo Truck Corporation
InventorsPer Johansson, Thomas Andersson, Anders Petersson
Life of this patent
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Abstract
The present invention relates to a method for determining a desired speed of a vehicle (1), preferably an autonomous vehicle. The vehicle comprises a shock absorber arrangement (2), preferably an hydraulic shock absorber arrangement, having an elastic hysteresis. The method comprises—obtaining (501) a reference value indicative of the energy dissipated by the shock absorber arrangement (2) in a reference driving condition of a vehicle and—determining (502) a speed of the vehicle for which the value indicative of the energy dissipated by the shock absorber arrangement (2) in a similar driving condition is expected to fall within a predetermined energy dissipation range, using said reference value.
Claims14
A method for determining a desired speed of a vehicle, the vehicle comprising a shock absorber arrangement having an elastic hysteresis, the method comprising:
- obtaining, by a control unit, a reference value indicative of the energy dissipated by the shock absorber arrangement in a reference driving condition of a vehicle by, under a load cycle:
- determining, by the control unit, a first set of accelerations or loads for one or more displacements of the shock absorber arrangement when the shock absorber arrangement is compressed;
- determining, by the control unit, a second set of accelerations or loads for the one or more displacements of the shock absorber arrangement when the shock absorber arrangement is expanded;
- and
- determining, by the control unit, the value indicative of the energy dissipated by the shock absorber arrangement using a difference between the second set of accelerations or loads for the one or more displacements and the first set of accelerations or loads for the one or more displacement;
- and
- determining, by the control unit, a speed of the vehicle for which a value indicative of the energy dissipated by the shock absorber arrangement in a similar driving condition is expected to fall within a predetermined energy dissipation range, using said reference value.
(canceled)
A system for determining a desired speed of a vehicle, the vehicle comprising a shock absorber arrangement having an elastic hysteresis, the system being configured to:
- obtain, by a control unit, a reference value indicative of the energy dissipated by the shock absorber arrangement in a reference driving condition of a vehicle by, under a load cycle:
- determining, by the control unit, a first set of accelerations or loads for one or more displacements of the shock absorber arrangement when the shock absorber arrangement is compressed;
- determining, by the control unit, a second set of accelerations or loads for the one or more displacements of the shock absorber arrangement when the shock absorber arrangement is expanded;
- and
- determining, by the control unit, the value indicative of the energy dissipated by the shock absorber arrangement using a difference between the second set of accelerations or loads for the one or more displacements and the first set of accelerations or loads for the one or more displacement;
- and
- determine, by the control unit, a speed of the vehicle for which a value indicative of the energy dissipated by the shock absorber in a similar driving condition is expected to fall within a predetermined energy dissipation range, using the reference value.
(canceled)
(canceled)
A vehicle comprising a system, the vehicle comprising a shock absorber arrangement having an elastic hysteresis, the system being configured to:
- obtain, by a control unit, a reference value indicative of the energy dissipated by the shock absorber arrangement in a reference driving condition of a vehicle by, under a load cycle:
- determining, by the control unit, a first set of accelerations or loads for one or more displacements of the shock absorber arrangement when the shock absorber arrangement is compressed;
- determining, by the control unit, a second set of accelerations or loads for the one or more displacements of the shock absorber arrangement when the shock absorber arrangement is expanded;
- and
- determining, by the control unit, the value indicative of the energy dissipated by the shock absorber arrangement using a difference between the second set of accelerations or loads for the one or more displacements and the first set of accelerations or loads for the one or more displacement;
- and
- determine, by the control unit, a speed of the vehicle for which a value indicative of the energy dissipated by the shock absorber in a similar driving condition is expected to fall within a predetermined energy dissipation range, using the reference value.
14-15. (canceled)
Dependencies are inferred from the claim text.