Method and device for determining torque setpoint values for a motor vehicle having at least two drive assemblies

• US 20020029624A1
• Filed: 08/06/2001
• Published: 03/14/2002
• Est. Priority Date: 08/04/2000
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Siemens AG
• Inventors: Probst, Gregor, Gutknecht-Stohr, Florian, Grassl, Georg, Gassner, Friedrich
• Granted Patent: US 6,588,256 B2
• Time in Patent Office: Days
• US Class Current: 73/117.3
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2530/00 Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/106 Rate of change
• CPC Class Codes: B60W 2540/30 Driving style
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y10S 903/903 having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/917 with transmission for changing gear ratio

Abstract

A method of determining setpoint values in motor vehicles that have at least two drive assemblies. Torque setpoint values are determined in separate evaluation branches for each of the drive assemblies as a function of a variable that characterizes the driver'"'"'s requirement and as a function of operating variables of the motor vehicle. The specific strengths and weaknesses of the respective drive assembly are taken into account directly in the respective evaluation branch.

Claims

1. A method for determining torque setpoint values for a motor vehicle having at least two drive assemblies, the method which comprises:

providing a motor vehicle having at least two drive assemblies;

providing the motor vehicle with a device for sensing a variable that characterizes a driver'"'"'s requirement;

providing the motor vehicle with a device for sensing operating variables of the motor vehicle;

providing a separate evaluation branch for each one of the at least two drive assemblies;

determining a respective torque setpoint value in each one of the at least two separate evaluation branches; and

determining each respective torque setpoint value as a function of the variable that characterizes the driver'"'"'s requirement and as a function of the operating variables of the motor vehicle.

2. The method according to claim 1, which comprises:

providing at least one of the at least two drive assemblies as an electric motor;

deriving a torque factor for the electric motor from the variable that characterizes the driver'"'"'s requirement and as a function of an aspect selected from the group consisting of a driver type and a charge state of a vehicle battery; and

determining an electric motor torque setpoint value from the torque factor for the electric motor and from a rotational speed, the electric motor torque setpoint value defining the torque setpoint value in one of the at least two separate evaluation branches.

3. The method according to claim 2, which comprises performing the torque factor deriving step by deriving the torque factor for the electric motor in dependence on a gradient of the variable that characterizes the driver'"'"'s requirement.

4. The method according to claim 3, which comprises performing the torque factor deriving step by deriving the torque factor for the electric motor in dependence on an integral over the variable that characterizes the driver'"'"'s requirement.

5. The method according to claim 2, which comprises performing the torque factor deriving step by deriving the torque factor for the electric motor in dependence on an integral over the variable that characterizes the driver'"'"'s requirement.

6. A device for determining torque setpoint values for a motor vehicle having at least two drive assemblies, comprising:

means for determining a torque setpoint value, for each one of at least two drive assemblies, as a function of a variable that characterizes a driver'"'"'s requirement and as a function of operating variables of a motor vehicle.

7. The device according to claim 6, wherein said means is configured to determine the torque setpoint values for individual ones of the drive assemblies in evaluation branches that are separate from one another.

9. The device according to claim 6, wherein said determination device is configured to determine the torque setpoint values for individual ones of the drive assemblies in evaluation branches that are separate from one another.

8. A device for determining torque setpoint values for a motor vehicle having at least two drive assemblies, comprising:

a determination device configured for determining a torque setpoint value, for each one of at least two drive assemblies, as a function of a variable that characterizes a driver'"'"'s requirement and as a function of operating variables of a motor vehicle.