Method and device for detecting a loosened bolted wheel joint on a wheel
AssigneeRobert Bosch GmbH
InventorsJan Scheuing, Jens Berg
Life of this patent
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Abstract
A method for detecting a loosened bolted wheel joint on a wheel of a vehicle. The angular velocity of a hub of the wheel is evaluated. A periodic wheel modulation of the angular velocity is ascertained. An oscillation of the wheel generated due to the loosened bolted wheel joint is detected, using a step-change in a phase angle of the modulation by an expected angular increment, which is a function of the number of bolts.
Claims11
A method for detecting a loosened bolted wheel joint on a wheel of a vehicle, the method comprising the following steps:
- evaluating an angular velocity of a hub of the wheel;
- ascertaining a periodic wheel modulation of the angular velocity;
- and
- detecting an oscillation of the wheel generated due to the loosened bolted wheel joint, using a change in a phase angle of the modulation, wherein the loosened bolted wheel joint is detected when the phase angle changes frequently by at least an expected angular increment.
A device configured to detect a loosened bolted wheel joint on a wheel of a vehicle, the device configured to:
- evaluate an angular velocity of a hub of the wheel;
- ascertain a periodic wheel modulation of the angular velocity;
- and
- detect an oscillation of the wheel generated due to the loosened bolted wheel joint, using a change in a phase angle of the modulation, wherein the loosened bolted wheel joint is detected when the phase angle changes frequently by at least an expected angular increment.
A non-transitory machine-readable storage medium on which is stored a computer program for detecting a loosened bolted wheel joint on a wheel of a vehicle, the computer program, when executed by a computer, causing the computer to perform the following steps:
- evaluating an angular velocity of a hub of the wheel;
- ascertaining a periodic wheel modulation of the angular velocity;
- and
- detecting an oscillation of the wheel generated due to the loosened bolted wheel joint, using a change in a phase angle of the modulation, wherein the loosened bolted wheel joint is detected when the phase angle changes frequently by at least an expected angular increment.
Dependencies are inferred from the claim text.