Drive train of a purely electrically all-wheel drivable motor vehicle

• US 9,457,658 B2
• Filed: 10/29/2012
• Issued: 10/04/2016
• Est. Priority Date: 12/05/2011
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr ING HCF Porsche AG
• Inventors: Knoblauch, Daniel
• Primary Examiner(s): BOEHLER, ANNE MARIE M
• Application Number:
  US14/363,066
• Publication Number:
  US 20150306955A1
• Time in Patent Office: 1,436 Days
• Field of Search: 180/65.1, 180/65.6, 180/69.6, 180/242, 180/243, 477/3
• US Class Current: 1/1
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 17/344 having a transfer gear
• CPC Class Codes: B60K 17/356 having fluid or electric motor, for driving one or more wheels disposition of motor in, or adjacent to, traction wheel B60K7/00
• CPC Class Codes: B60L 15/2036 Electric differentials, e.g. for supporting steering vehicles
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2220/12 Induction machines
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2220/46 Wheel motors, i.e. motor connected to only one wheel
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2260/28 Four wheel or all wheel drive
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60Y 2200/91 Electric vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A drive train (1) of a purely electrically all-wheel drivable motor vehicle, has a first axle (2), a second axle and two electric machines (10) arranged in the direction of travel (3) of the motor vehicle. The first axle (2) can be driven by the electric machines (10) via a transmission (11). The transmission (11) and the first axle (2) are connected to each other by at least one bevel gear toothing (20, 7; 20, 27), and the transmission (11) and a shaft for driving the second axle are connected to each other by at least a further toothing (22, 23; 22, 28). In this way, an all-wheel drive can be achieved with a simple construction by the use of such a drive train in a motor vehicle that is to be operated in a purely electrical manner.

Claims

1. A drive train of a purely electrically all-wheel drivable motor vehicle, comprising a first axle and a second axle spaced apart along a direction of travel of the motor vehicle, and two electric machines arranged laterally of one another and each having a driven shaft aligned in the direction of travel of the motor vehicle, the two electric machines further being disposed so that the first axle is between the second axle and the electric machines, the first axle being drivable by the electric machines via a gearing, the gearing having a first shaft that is drivable by the two electric machines, a first spur gear and at least one bevel gear toothing being connected to the first shaft, the gearing and the first axle being connected to each other by the at least one bevel gear toothing, and the gearing and a second shaft for driving the second axle being connected to each other by the first spur gear on the first shaft meshing with a second spur gear on the second shaft.

2. The drive train of claim 1, wherein the first axle is a rear axle of the motor vehicle.

3. The drive train of claim 2, wherein the electric machines are arranged behind the rear axle.

4. The drive train of claim 1, wherein the drive train is a drive train of a sports car.

5. The drive train of claim 1, wherein the electric machines are connected to each other via a constant transmission ratio or a switching mechanism.

6. The drive train of claim 1, wherein the bevel gear toothing has a pinion and a crown wheel, the pinion being connected to said gearing shaft and a differential of the first axle being drivable by the crown wheel.

7. The drive train of claim 1, wherein the shaft for driving the second axle is a cardan shaft.

8. The drive train of claim 1, wherein the two electric machines are synchronous machines or asynchronous machines, or the one electric machine is a synchronous machine and the other electric machine is an asynchronous machine.

9. The drive train of claim 1, wherein the driven shafts of the two electric machines are parallel to one another and laterally spaced.

10. The drive train of claim 9, wherein the driven shafts of the two electric machines are parallel to the first and second shafts.

11. The drive train of claim 9, wherein rotational axes of the driven shafts of the two electric machines are on opposite sides of a rotational axis of the first shaft.

12. The drive train of claim 1, wherein the driven shafts of the electric machines extend from the respective electric machine toward the second axle.