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US 7,509,193 B2Granted
Method and device for limiting the driving speed of a motor vehicle
AssigneeRobert Bosch GmbH
InventorMario Kustosch
Life of this patent
Estimating the term…
Abstract
A method and a device are provided for limiting the driving speed of a motor vehicle that allow a selectable, fixed fuel consumption per distance traveled to be maintained without limiting short-term acceleration. In this context, the driving speed is limited to a maximum value (vmaxbe), at which a predefined maximum fuel consumption (Besetpoint) for steady driving speed is not exceeded.
Claims10
A method for limiting a driving speed of a motor vehicle, comprising:
- limiting the driving speed to a predefined maximum value, the maximum value corresponding to a predefined maximum fuel consumption for a steady driving speed;
- wherein:
- the maximum value for the driving speed is determined from a maximum drive power of the vehicle derived from a relationship between the predefined maximum fuel consumption and a specific fuel consumption of the engine of the vehicle at an instantaneous operating point, based on an inverse characteristic curve for a speed-dependent proportion of a total driving resistance;
- the maximum drive power of the vehicle is adjusted using a speed-independent proportion of the total driving resistance;
- and
- the speed-independent proportion of the total driving resistance is determined by subtracting the speed-dependent proportion of the total driving resistance and an inertial force of the vehicle from an instantaneous drive power of the vehicle.
3 more elements
A device for limiting a driving speed of a motor vehicle, comprising:
- an arrangement for determining a maximum fuel consumption for a steady driving speed;
- an arrangement for limiting the driving speed to a maximum value corresponding to the determined maximum fuel consumption;
- and
- wherein:
- the maximum value for the driving speed is determined from a maximum drive power of the vehicle derived from a relationship between the predefined maximum fuel consumption and a specific fuel consumption of the engine of the vehicle at an instantaneous operating point, based on an inverse characteristic curve for a speed-dependent proportion of a total driving resistance;
- the maximum drive power of the vehicle is adjusted using a speed-independent proportion of the total driving resistance;
- and
- the speed-independent proportion of the total driving resistance is determined by subtracting the speed-dependent proportion of the total driving resistance and an inertial force of the vehicle from an instantaneous drive power of the vehicle.
5 more elements
Dependencies are inferred from the claim text.