METHOD FOR OPERATING A DRIVE DEVICE OF A MOTOR VEHICLE AND CORRESPONDING DRIVE DEVICE

• US 20180051641A1
• Filed: 03/08/2017
• Published: 02/22/2018
• Est. Priority Date: 03/26/2016
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: WILDING, WERNER
• Granted Patent: US 10,697,381 B2
• Time in Patent Office: Days
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 37/10 at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
• CPC Class Codes: F02B 37/16 by bypassing charging air
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/1002 Output torque
• CPC Class Codes: F02D 2200/60 said parameters being related to the driver demands or status
• CPC Class Codes: F02D 2200/604 Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
• CPC Class Codes: F02D 2200/606 Driving style, e.g. sporty or economic driving
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: F02D 41/10 for acceleration
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A method for operating a drive device of a motor vehicle is disclosed. The drive device has a compressor, which can be driven by an electric motor for supplying combustion fresh gas to an internal combustion engine of the motor vehicle. At a power increase of the internal combustion engine, the compressor is driven with the electric motor so that a torque curve selected from a plurality of different torque curves is established at the internal combustion engine over its rotational speed.

Claims

1. A method for operating a drive device of a motor vehicle, said method comprising:

providing a drive device having a compressor drivable by an electric motor for supplying combustion fresh gas to an internal combustion engine of the motor vehicle; and

at a power increase of the internal combustion engine driving the compressor with an electric motor so that a torque curve selected from a plurality of different torque curves is established at the internal combustion engine over a rotational speed of the internal combustion engine.

2. The method of claim 1, wherein one of the torque curves corresponds to a maximal power increase of the internal combustion engine.

3. The method of claim 1, wherein at least one of the torque curves has a constant torque increase gradient up to a maximal torque of the internal combustion engine.

4. The method of claim 3, wherein all of the torque curves have a constant torque increase gradient up to a maximal torque of the internal combustion engine.

5. The method of claim 1, wherein at least one of the torque curves has a torque increase gradient which decreases or increases in a direction of higher torques.

6. The method of claim 5, wherein all of the torque curves have a torque increase gradient which decreases or increases in a direction of higher torques.

7. The method of claim 1, further comprising driving the compressor solely by means of the electric motor.

8. The method of claim 1, wherein the torque curve is selectable from the plurality of different torque curves by a driver of the motor vehicle by means of a setting device.

9. The method of claim 1, wherein the torque curve is selected as a function of an identification feature assigned to a driver of the motor vehicle.

10. The method of claim 1, further comprising only driving the compressor with the electric motor when the power increase exceeds a threshold value.

11. The method of claim 1, further comprising conducting with a bypass device fresh gas to be provided by an exhaust gas turbocharger so that the fresh gas circumvents the compressor when the power increase of the internal combustion engine falls below the threshold value.

12. A drive device for a motor vehicle, comprising:

an internal combustion engine;

an electric motor; and

a compressor drivable with the electric motor for supplying combustion fresh gas to the internal combustion engine, said drive device being configured to drive the compressor by means of the electric motor at a power increase of the internal combustion engine so that a torque curve selected from a plurality of different torque curves is established at the internal combustion engine over its rotational speed.