Method for operating a motor vehicle

Abstract

A method for operating a motor vehicle. The motor vehicle has a drive unit which is designed in such a way that, in case of acceleration, the motor vehicle is accelerated using a continuous torque output. The drive unit is operable in a first and second operating mode. In the first operating mode the motor vehicle is accelerated without interruption by the continuous torque output, and in the second operating mode the continuous torque output is changed over to a stepped torque output, so that in the second operating mode the motor vehicle is accelerated subject to interruption by the stepped torque output.

Claims

1. A method for operating a motor vehicle, wherein the motor vehicle has a drive unit configured to operate in both a first operating mode and a second operating mode, the method comprising: presenting, to a driver, a list of predefined sounds, wherein the driver selects a type of acoustic sound from the list of predefined sounds as a selected sound; in the first operating mode, accelerating the motor vehicle without interruption by a continuous torque output; and in the second operating mode, changing the continuous torque output over to a stepped torque output, so that acceleration of the motor vehicle is subject to interruption by the stepped torque output and the selected sound is emitted during the interruption.

2. The method as claimed in claim 1, further comprising: switching between the first operating mode and the second operating mode after actuation of an actuating element.

3. The method as claimed in claim 1, further comprising: in the second operating mode, setting the torque output subject to interruptions with regard to a number (n) of interruptions.

4. The method as claimed in claim 1, further comprising: in the second operating mode, setting the torque output subject to interruptions with regard to a strength of a torque reduction (?M) after the interruptions.

5. The method as claimed in claim 1, further comprising: in the second operating mode, setting the torque output subject to interruptions with regard to a duration (t) of an interruption.

6. The method as claimed in claim 1, further comprising: in the second operating mode, generating an acoustic signal after an interruption in the torque output.

7. The method as claimed in claim 6, further comprising: activating an output of the acoustic signal.

8. The method as claimed in claim 3, further comprising: performing the selection of the type of acoustic sound from the list of predefined sounds as the selected sound in an infotainment system of the motor vehicle.

9. The method as claimed in claim 2, further comprising: wherein in the second operating mode, setting the torque output subject to interruptions with regard to a number (n) of interruptions.

10. The method as claimed in claim 3, further comprising: wherein in the second operating mode, setting the torque output subject to interruptions with regard to a strength of a torque reduction (?M) after the interruptions an interruption.

11. The method as claimed in claim 2, further comprising: wherein in the second operating mode, setting the torque output subject to interruptions with regard to a duration (t) of an interruption.

12. The method as claimed in claim 3, further comprising: wherein in the second operating mode, setting the torque output subject to interruptions with regard to a duration (t) of an interruption.

13. The method as claimed in claim 4, further comprising: wherein in the second operating mode, setting the torque output subject to interruptions with regard to a duration (t) of an interruption.

14. The method as claimed in claim 2, further comprising: wherein in the second operating mode, generating an acoustic signal in the event of an interruption in the torque output.

15. The method as claimed in claim 3, further comprising: wherein in the second operating mode, generating an acoustic signal in the event of an interruption in the torque output.

16. The method as claimed in claim 4, further comprising: wherein in the second operating mode, generating an acoustic signal in the event of an interruption in the torque output.

17. The method as claimed in claim 5, further comprising: wherein in the second operating mode, generating an acoustic signal in the event of an interruption in the torque output.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) In the figures:

(2) FIG. 1 shows an acceleration curve diagram in which the acceleration of the motor vehicle in the first operating mode is shown;

(3) FIG. 2 shows a further acceleration curve diagram in which the motor vehicle is accelerated according to the second operating mode, and

(4) FIG. 3 shows an enlarged detail from the acceleration curve diagram from FIG. 2.

DETAILED DESCRIPTION

(5) FIGS. 1 and 2 show an acceleration curve diagram designated as a whole by the reference numeral 10. The acceleration curve shown is designated by the reference numeral 12. As FIG. 1 and FIG. 2 show, the velocity v of the motor vehicle is plotted on the x axis and the torque M is plotted on the y axis.

(6) In the present case, the motor vehicle is a gearless electric vehicle, i.e., there is no gear change when the motor vehicle is accelerated.

(7) As can be clearly seen in FIG. 1, the acceleration curve 12 of the gearless electric vehicle has an uninterrupted, i.e., in the mathematical sense, continuous curve profile. This uninterrupted curve profile represents the first operating mode.

(8) According to the method, it is provided that the motor vehicle can also be operated in a second operating mode. This second operating mode is shown in FIG. 2.

(9) As can be seen from FIG. 2, in the second operating mode, the acceleration curve 12 has a stepped or discontinuous curve profile. In the present case, the acceleration curve 12 has n=4 interruptions. The interruptions are also denoted by the reference numeral 14 hereinafter. This means that when accelerating, a brief reduction in torque occurs four times, resulting in an interruption in traction perceptible to the driver. The interruption interaction in combination with the acoustic effect that occurs due to the change in torque has a positive effect on the attention of the driver, since this also reduces the fatigue effect in particular, which in turn has a positive effect on safety in road traffic.

(10) In the present case, it is also provided that, in addition to the acoustic effect that occurs due to the change in torque, an additional acoustic signal is also generated and output upon each interruption. As a result, the above-mentioned advantage, namely the increase in the attention of the driver, is additionally strengthened.

(11) It is particularly preferred that both the number n of interruptions and the strength ?M of the torque reduction in the event of an interruption, as well as the duration t of an interruption are freely settable. The above parameters, intensity ?M of the torque reduction, and duration t of an interruption, can be seen from FIG. 3.