Device for Controlling an Individual Wheel Drive in Electrified Two-Axle Motor Vehicles

Abstract

An apparatus for controlling an individual wheel drive in a two-axle motor vehicle having at least one electrified vehicle axle on which an electric drive motor is associated with each wheel is provided. The apparatus includes an electronic controller and a coupling which can be controlled by the electronic controller between the electric drive motors, wherein the electronic controller and the coupling are configured in such a way that (i) given at least one first specified condition in a first actuating mode, only one defined electric drive motor drives both wheels, with the other electric drive motor being stopped, and (ii) given at least one second specified condition in a second actuating mode, both electric drive motors drive one wheel each, separately from one another.

Claims

1.-6. (canceled)

7. An apparatus for controlling an individual wheel drive in a two-axle motor vehicle having at least one electrified vehicle axle on which an electric drive motor is associated with each wheel, the apparatus comprising: an electronic controller; and a coupling which can be adjusted by the electronic controller between the electric drive motors; wherein the electronic controller and the coupling are configured in such a way that given at least one first specified condition in a first actuating mode, only a first electric drive motor of the electric drive motors drives both wheels, and a second electric drive motor of the electric drive motors is stopped, and given at least one second specified condition in a second actuating mode, both of the electric drive motors drive one wheel each, separately from one another.

8. The apparatus as claimed in claim 7, wherein the coupling comprises a first sliding sleeve and a second sliding sleeve, the first sliding sleeve, in the first actuating mode, being configured to decouple the second electric drive motor from the first drive shaft, which is associated with the second electric drive motor, and the second sliding sleeve, in the first actuating mode, being configured to couple the first electric drive motor to the first drive shaft.

9. The apparatus as claimed in claim 7, wherein the coupling comprises a first sliding sleeve and a second sliding sleeve, the first sliding sleeve, in the second actuating mode, being configured to couple the first electric drive motor to the first drive shaft, which is associated with the first electric drive motor, and the second sliding sleeve, in the second actuating mode, being configured to couple the second electric drive motor to the second drive shaft, which is associated with the second electric drive motor.

10. The apparatus as claimed in claim 8, wherein the second sliding sleeve, in both actuating modes, is connected to a bevel gear of a differential on the second drive shaft.

11. The apparatus as claimed in claim 9, wherein the second sliding sleeve, in both actuating modes, is connected to a bevel gear of a differential on the second drive shaft.

12. The apparatus as claimed in claim 7, wherein the at least one first specified condition includes a power requirement below a first defined threshold.

13. The apparatus as claimed in claim 8, wherein the at least one first specified condition includes a power requirement below a first defined threshold.

14. The apparatus as claimed in claim 9, wherein the at least one first specified condition includes a power requirement below a first defined threshold.

15. The apparatus as claimed in claim 10, wherein the at least one first specified condition includes a power requirement below a first defined threshold.

16. The apparatus as claimed in claim 11, wherein the at least one first specified condition includes a power requirement below a first defined threshold.

17. The apparatus as claimed in claim 7, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

18. The apparatus as claimed in claim 8, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

19. The apparatus as claimed in claim 9, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

20. The apparatus as claimed in claim 10, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

21. The apparatus as claimed in claim 11, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

22. The apparatus as claimed in claim 12, wherein the at least one second specified condition includes a power requirement above a second defined threshold.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 shows a schematic illustration of an overview of the essential components of the invention in a first mode, and

[0021] FIG. 2 shows a schematic illustration of an overview of the essential components of the invention in a second mode.

DETAILED DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 shows a mode 1, and FIG. 2 shows a mode 2.

[0023] In principle, both electric motors EM1 and EM2 are used in mode 2 according to FIG. 2. On the side of one electric motor EM2 (e.g., on the left-hand side of a rear axle HA), the (last) gear Z1 of the transmission G2 is connected to the output shaft A2 via a gear Z2 by a first (e.g., left-hand) sliding sleeve S1. On the side of the other electric motor EM1 (e.g., on the right-hand side of a rear axle HA), the (here) left-hand outer bevel gear D1 of a differential D is connected to the other output shaft A1 by a second (here right-hand) sliding sleeve S2 via the gears Z3 and Z4. Therefore, the differential is rigid and the electric motor EM1 is directly connected to the right-hand output shaft A1.

[0024] In mode 1 according to FIG. 1, the electric motor EM2 is decoupled from the drive or from the output shaft A2 and can be stopped by means of the first sliding sleeve S1. The connection in the differential D is canceled and the left-hand bevel gear D1 is coupled to the left-hand output shaft A2 by means of the second sliding sleeve S2.

[0025] Identical components are provided with the same reference signs in FIG. 1 and FIG. 2. Both Figures show the identical components once in mode 1 and once in mode 2. Therefore, both Figures show the control according to the invention of an individual wheel drive in a two-axle motor vehicle having at least one electrified vehicle axle on which an electric drive motor EM1 and EM2 is associated with each wheel R1 and R2. The Figures further show an electronic control unit SE and a coupling unit K which can be adjusted between the electric drive motors EM1 and EM2 by the control unit SE, the control unit SE and the coupling unit K being configured to implement two modes 1 and 2. In mode 1, the coupling unit K, which comprises two selection sleeves S1 and S2 in particular, is designed, in particular also by corresponding programming of the control unit SE, in such a way that, given at least one first specified condition, only one defined electric drive motor, here EM1, drives both wheels R1 and R2, the other electric drive motor, here EM2, being stopped. In mode 2, the coupling unit K, which comprises two selection sleeves S1 and S2 in particular, is designed, in particular by corresponding programming of the control unit SE, in such a way that, for at least one second specified condition, the two electric drive motors EM1 and EM2 drive one wheel R1 and R2 each, separately from one another.

[0026] Here, in mode 1, the first electric drive motor EM2 is decoupled from the first drive shaft A2, which is associated with it, by means of the first sliding sleeve S1, which is adjusted to a first actuating position. In mode 1, the second electric drive motor EM1 is coupled to this first drive shaft A2 by means of the second sliding sleeve S2, which is likewise adjusted to a first actuating position, (FIG. 1).

[0027] In mode 2, the first sliding sleeve S1 is adjusted to a second actuating position in such a way that the first electric drive motor EM2 is coupled to the first drive shaft A2, which is associated with it. The second sliding sleeve S2 is likewise adjusted to a second actuating position by way of which the second electric drive motor EM1 is coupled to the second drive shaft A1, which is associated with it (FIG. 2).

[0028] The second sliding sleeve S2 is connected to the bevel gear D1 of the differential D, which is associated with the second drive shaft A1, in both actuating modes (mode 1, mode 2).