Consumption-oriented driving-power limitation of a vehicle drive
First Claim
1. Method for regulating driving-power of a vehicle as a function of at least a distance to a destination and of an available energy supply of the energy accumulator providing the driving power, said method comprising the steps of:
- first, at the beginning of a journey, entering journey data into a trip computer via an input unit, from which data at least a total distance to the destination can be determined;
second, during the journey, determining at least a currently remaining distance to said destination;
third, during the journey, measuring a remaining energy supply which is currently available in said energy accumulator;
fourth, during the journey, determining in said trip computer a permissible nominal energy consumption rate which enables said vehicle to travel the remaining distance based on the measured currently available energy supply and determined remaining distance to the destination;
fifth, controlling a set point value for a device for driving-power limitation based on the permissible nominal energy consumption rate so that the driving power is limited more severely the smaller the permissible nominal consumption rate determined; and
sixth repeating said second through fifth steps throughout the journey, whereby said permissible nominal energy consumption rate is continuously updated.
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Accused Products
Abstract
A method for assisting the driver of a vehicle in the optimum use of the on-board energy supply, by consumption-oriented driving-power limitation, especially for electric vehicles. A permissible consumption rate related to the remaining distance is determined continuously starting from the available energy supply and this section consumption is used, taking into account the driving resistances, to determine a set point value which controls a device for driving-power limitation. In a preferred embodiment, an electronic accelerator pedal is provided, with a pedal travel divided into two angular ranges, the second angular range requiring an increased actuating force and being allocated to a power range inhibited in accordance with the set point value. The division into the two angular ranges is adjustable by means of a positioning motor as a function of the permissible section consumption.
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Citations
16 Claims
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1. Method for regulating driving-power of a vehicle as a function of at least a distance to a destination and of an available energy supply of the energy accumulator providing the driving power, said method comprising the steps of:
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first, at the beginning of a journey, entering journey data into a trip computer via an input unit, from which data at least a total distance to the destination can be determined; second, during the journey, determining at least a currently remaining distance to said destination; third, during the journey, measuring a remaining energy supply which is currently available in said energy accumulator; fourth, during the journey, determining in said trip computer a permissible nominal energy consumption rate which enables said vehicle to travel the remaining distance based on the measured currently available energy supply and determined remaining distance to the destination; fifth, controlling a set point value for a device for driving-power limitation based on the permissible nominal energy consumption rate so that the driving power is limited more severely the smaller the permissible nominal consumption rate determined; and sixth repeating said second through fifth steps throughout the journey, whereby said permissible nominal energy consumption rate is continuously updated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for limiting driving-power of a vehicle as a function of a destination and of an energy supply of the energy accumulator providing the driving power, by the steps of (i) at the beginning of a journey a driver of the vehicle specifies journey data to a trip computer via an input unit, from which data at least a total distance to the destination can be determined;
- (ii) during the journey, a trip computer repeatedly determines a permissible nominal energy consumption rate to travel the distance ahead on the basis of the measured current energy supply; and
(iii) the nominal energy consumption rate is used to derive a set point value for a device for driving-power limitation so that the driving power is limited more severely the smaller the nominal consumption rate determined, said apparatus comprising;an input unit for inputting at least route information concerning said journey; a trip computer coupled to receive said route information, for performing said steps for limiting driving power; a data memory; a distance recorder; an energy supply recorder; a display unit; and a device for driving power limitation in response to instructions from said trip computer.
- (ii) during the journey, a trip computer repeatedly determines a permissible nominal energy consumption rate to travel the distance ahead on the basis of the measured current energy supply; and
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15. Device for limiting driving-power of a vehicle with an electronic accelerator pedal as a function of a set point value in the drive control, wherein:
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a power range of said vehicle is divided into a freely available, lower power range and an upper, inhibited power range; a travel range of the accelerator pedal is divided into two angular ranges, a first angular range (α
) being allocated to the freely available power range and a second angular range (β
) requiring an increased actuating force and being allocated to the inhibited power range. - View Dependent Claims (16)
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Specification