METHOD FOR OPERATING A MOTOR VEHICLE AND CORRESPONDING MOTOR VEHICLE

Abstract

A method for operating a motor vehicle is disclosed. The motor vehicle is provided with a hybrid drive device having an electric machine, an internal combustion engine and a particle filter associated with the internal combustion engine, wherein the internal combustion engine is operated temporarily for regenerating the particle filter. In a first operating mode, the regeneration is only started when it is determined by a navigation device that an electric driving region to be driven through lies ahead, in which region an operation of the internal combustion engine and/or the regeneration of the particle filter is not desired.

Claims

1-10. (canceled)

11. A method for operating a motor vehicle, said motor vehicle comprising a hybrid drive device having an electric machine, an internal combustion engine and a particle filter assigned to the electric machine, said method comprising: temporarily operating the combustion engine for regenerating the particle filter, wherein in a first operating mode the regenerating is only initiated when a navigation device determines that an electric driving region to be driven through by the motor vehicle lies ahead in which electric driving region an operation of the internal combustion engine and/or a regeneration of the particle filter is not desired.

12. The method of claim 11, wherein in the first operating mode the regenerating is only initiated when a filling level of the particle filter is greater than a first threshold value, wherein the first threshold value is a minimal filling level which corresponds to an empty particle filter.

13. The method of claim 12, wherein in the first operating mode the regenerating is only initiated when the filling level is greater than a second threshold value which is greater than the first threshold value.

14. The method of claim 11, wherein the regenerating is only performed in a regeneration driving region when the navigation device determines that the motor vehicle drives through the regeneration driving region.

15. The method of claim 14, wherein the regenerating is only performed in the regeneration driving region when the navigation device determines that the motor vehicle drives through the regeneration driving region before driving through the electric driving region.

16. The method of claim 11, wherein the regenerating is initiated when the internal combustion engine is operated so that the internal combustion engine provides a drive torque which is greater than a predefined drive torque requested for driving the motor vehicle.

17. The method of claim 16, further comprising charging an energy storage of the motor vehicle by driving the electric machine with the internal combustion engine, and applying a torque corresponding to a difference between the drive torque and the predefined torque to the electric machine.

18. The method of claim 17, wherein the energy storage is charged when the navigation device detects the electric driving region ahead.

19. The method of claim 11, further comprising changing into a second operating mode in which the regenerating is initiated immediately when the filling level of the particle filter exceeds a third threshold value.

20. The method of claim 11, further comprising changing into the first operating mode when the filling level of the particle filter falls below a defined filling level.

21. A motor vehicle, comprising: a hybrid drive device, said hybrid drive device comprising an electric machine, an internal combustion engine and a particle filter assigned to the internal combustion engine, said internal combustion engine being temporarily operable for regenerating the particle filter, said motor vehicle being configured to initiate a regeneration of the particle filter in a first operating mode only when a navigation device determines that an electric driving region to be driven through by the motor vehicle lies ahead in which electric driving region an operation of the internal combustion engine and/or the regeneration of the particle filter is not desired.

Description

[0021] The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the drawing, without limiting the invention. It is shown in the sole

[0022] FIGURE a motor vehicle on a driving route which has been divided into several regions.

[0023] The FIGURE shows a motor vehicle 1, which moves on a defined driving route 2. In this case, the driving route 2 starts, for example, from a starting point 3 and ends at a destination point 4. The driving route 2 is preferably determined by a navigation device (not shown) of the motor vehicle 1. For this purpose, the starting point 3 can correspond to the position of the motor vehicle 1 at the start of its operation, while the destination point 4 is or has been set by a driver of the motor vehicle 1. The navigation device now divides the driving route 2 into a plurality of regions 5, 6 and 7.

[0024] The region 5 is, for example, a hybrid driving region, region 6 a regeneration region, and region 7 an electric driving region. This means that the motor vehicle is to be driven by hybrid drive in region 5, wherein the electric machine and the internal combustion engine are solely alternately used for driving the motor vehicle. The region 7 is provided as an electric driving region in which the motor vehicle is preferably to be driven solely by means of the electric machine. This means that an operation of the internal combustion engine or at least a regeneration of a particle filter associated with the internal combustion engine is not desired in region 7. On the other hand, region 6 is a regeneration region in which in particular the regeneration of the particle filter is permitted.

[0025] When the navigation device determines that the electric driving region 7 is ahead, regeneration of the particle filter is initiated anticipatorily in a first operating mode in a. This is the case, in particular, when an energy storage is to be charged by means of the electric machine, which is then operated as a generator. For this purpose, the internal combustion engine generates a drive torque which is greater than a predefined torque, which is preferably determined by the driver of the motor vehicle and/or by a driver-assistant device. The difference between the drive torque and the predefined torque is used to drive the electric machine and to generate electrical current for charging the energy storage device. The energy storage is particularly preferably charged to such an extent that the motor vehicle 1 is able to drive through the electric driving region 7 at least partially, preferably largely or even completely, solely by means of the electric machine, which is operated with the electrical energy stored in the energy storage.

[0026] With such a procedure, an irritation of the driver due to an unexpected starting of the internal combustion engine and/or unexpected operating noises of the internal combustion engine is prevented. Accordingly, the driving comfort offered to the driver by the motor vehicle increases.