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US 2019/0054979 A1Published application
Method for ascertaining a wheel circumference of a driven wheel, control method for a drive motor, control unit, and vehicle
AssigneeRobert Bosch GmbH
InventorsJuergen Stegmaier, Rinaldo Greiner
Life of this patent
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Abstract
A method for ascertaining a wheel circumference of a driven wheel of a vehicle includes measuring a rotational speed of the driven wheel during a predefined time span, measuring an acceleration of the vehicle in the direction of the longitudinal axis of the vehicle during a predefined time span, determining a distance traveled by the vehicle based on the measured acceleration, and determining the wheel circumference of the driven wheel based on the measured rotational speed and the ascertained distance traveled.
Claims8
A method comprising:
- measuring a rotational speed of a driven wheel of a vehicle during a predefined time span;
- measuring an acceleration of the vehicle in a direction of a longitudinal axis of the vehicle during the predefined time span;
- determining a distance traveled by the vehicle during the predefined time span based on the measured acceleration;
- and
- determining a wheel circumference of the driven wheel based on the measured rotational speed and the determined distance.
2 more elements
A control unit of a vehicle comprising:
- a speed sensor;
- an acceleration sensor;
- and
- an arithmetic unit communicatively coupled to the speed and acceleration sensors;
- wherein:
- the speed sensor is configured to measure a rotational speed of a driven wheel of the vehicle during a predefined time span;
- the acceleration sensor is configured to measure an acceleration of the vehicle in a direction of a longitudinal axis of the vehicle during the predefined time span;
- and
- the arithmetic unit is configured to:
- determine a distance traveled by the vehicle during the predefined time span based on the measured acceleration obtained by the arithmetic unit from the acceleration sensor;
- and
- determine a wheel circumference of the driven wheel based on the determined distance and measured rotational speed obtained by the arithmetic unit from the speed sensor.
9 more elements
A vehicle comprising:
- a speed sensor;
- an acceleration sensor;
- and
- an arithmetic unit communicatively coupled to the speed and acceleration sensors;
- wherein:
- the speed sensor is configured to measure a rotational speed of a driven wheel of the vehicle during a predefined time span;
- the acceleration sensor is configured to measure an acceleration of the vehicle in a direction of a longitudinal axis of the vehicle during the predefined time span;
- and
- the arithmetic unit is configured to:
- determine a distance traveled by the vehicle during the predefined time span based on the measured acceleration obtained by the arithmetic unit from the acceleration sensor;
- and
- determine a wheel circumference of the driven wheel based on the determined distance and measured rotational speed obtained by the arithmetic unit from the speed sensor.
9 more elements
Dependencies are inferred from the claim text.