Vehicle having a recuperation system

1. A vehicle, comprising:

an internal combustion engine;

a transmission having multiple gears and a transmission input shaft;

an electrical energy storage; and

a recuperation system for recovering electrical energy, wherein:

the recuperation system includes an electric machine and is configured for synchronizing a speed value of the internal combustion engine during gear changes from an actual gear into a setpoint gear having a speed value of the transmission input shaft in the setpoint gear, the gear changes including a first gear change transitioning to a higher gear and a second gear change transitioning to a lower gear;

during the first gear change, the electrical energy storage is configured to store electrical energy that had been converted by the electric machine from kinetic energy stored in the internal combustion engine; and

during the second gear change, the electrical energy storage is configured to power the electric machine, thereby driving the internal combustion engine.

2. The vehicle of claim 1 , wherein the recuperation system is configured for determining the setpoint gear and a gear ratio of the setpoint gear.

3. The vehicle of claim 1 , wherein the recuperation system is configured for determining the speed value of the transmission input shaft in the setpoint gear.

4. The vehicle of claim 1 , wherein the recuperation system is configured for determining an instantaneous speed of the internal combustion engine.

5. The vehicle of claim 1 , wherein the recuperation system is configured for determining a speed of the vehicle.

6. The vehicle of claim 1 , wherein the recuperation system has a memory for storing transmission ratios.

7. The vehicle of claim 1 , wherein the electric machine is configured for reducing the speed value of the internal combustion engine when the electric machine is operated in generator mode.

8. The vehicle of claim 1 , wherein the electric machine is configured for increasing the speed value of the internal combustion engine when the electric machine is operated as a motor.

9. A method for operating a vehicle having an internal combustion engine, a transmission having multiple gears and a transmission input shaft, and a recuperation system for recovering electrical energy, the recuperation system including an electrical energy storage and an electrical machine, the method comprising:

synchronizing a speed value of the internal combustion engine during gear changes from an actual gear into a setpoint gear at a speed value of the transmission input shaft in the setpoint gear, the gear changes including a first gear change transitioning to a higher gear and a second gear change transitioning to a lower gear;

storing, by the electrical energy storage and during the first gear change, electrical energy that had been converted by the electric machine from kinetic energy stored in the internal combustion engine; and

during the second gear change, powering, by the electrical energy storage, the electric machine to drive the internal combustion engine.

10. The method of claim 9 , further comprising:

determining the setpoint gear and a gear ratio of the setpoint gear.

11. The method of claim 9 , further comprising:

determining the speed value of the transmission input shaft in the setpoint gear.

12. The method of claim 9 , further comprising:

determining the instantaneous speed of the internal combustion engine.

13. The method of claim 9 , further comprising:

determining a speed of the vehicle.

14. The method of claim 9 , further comprising:

reducing the speed value of the internal combustion engine when the recuperation system is operated in generator mode.

15. The method of claim 9 , further comprising:

increasing the speed value of the internal combustion engine when the electrical machine is operated as a motor.