Hybrid drive motor vehicle control system comprising distributed functional components for controlling hybrid drive operating status

• US 8,396,619 B2
• Filed: 10/16/2008
• Issued: 03/12/2013
• Est. Priority Date: 10/24/2007
• Status: Expired due to Fees

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Amann, Notker, Mittelberger, Christian, Blattner, Stefan
• Primary Examiner(s): Black, Thomas
• Assistant Examiner(s): Nolan, Peter D
• Application Number:
  US12/739,236
• Publication Number:
  US 20100318251A1
• Time in Patent Office: 1,608 Days
• Field of Search: 700/4
• US Class Current: 701/22
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• 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 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• 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 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2050/0006 Digital architecture hierarchy
• CPC Class Codes: B60W 2050/0016 State machine analysis
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A vehicle control system with a hybrid drive comprising an engine and an electric motor and a plurality of functional components each divided into a strategy sub-component, a control sub-component and an actuator sub-component. The functional components include at least engine, transmission and hybrid functional components. The strategy sub-component (8) of the hybrid functional component (4) comprises an operating status prescription module (17) which reads in a first quantity of data from functional components in order to determine a prescribed value for the operating status of the hybrid drive, processes the read in data in order to produce a second quantity of output variables, and in a second sub-module (29), determines the prescribed value for the operating status of the hybrid drive using the output variables from the first sub-module (27) and with the help of automatic status-determining mechanism.

Claims

1. A motor vehicle control system for controlling a motor vehicle with a hybrid drive comprising an internal combustion engine and an electric motor, the vehicle control system comprising:

a plurality of functional components, each divided into at least three sub-components; and

the at least three sub-components comprising a strategy sub-component (8), a control sub-component (9) and an actuator sub-component (10),

the plurality of functional components including at least;

an internal combustion engine functional component (2) for controlling the internal combustion engine,

a transmission functional component (3) for controlling a transmission and

a dedicated hybrid functional component (4) for controlling only the electric motor and a clutch connected between the internal combustion engine and the electric motor such that;

the strategy sub-component (8), of the hybrid functional component (4), comprises an operating status prescription module (17) which reads in a first quantity of data from functional components in order to determine a prescribed value for an operating status of the hybrid drive,

wherein the operating status prescription module (17) comprises a first sub-module (27) and a second sub-module (29);

the first sub-module (27), processes the first quantity of data in order to produce a smaller second quantity of output variables (28), and

the second sub-module (29) utilizes the smaller second quantity of output variables (28) from the first sub-module (27), via an automatic status-determiner, to determine the prescribed value for the operating status of the hybrid drive.

2. The motor vehicle control system according to claim 1, wherein the second sub-module (29) of the operating status prescription module (17) determines, as the prescribed value for the operating status of the hybrid drive, one of the following operating conditions:

a) electric driving with the electric motor coupled to the drive output and the internal combustion engine static and decoupled from the drive output;

b) electric driving with the electric motor coupled to the drive output and the internal combustion engine running but decoupled from the drive output;

c) hybrid driving with the electric motor coupled to the drive output and the internal combustion engine running and also coupled to the drive output; and

d) a pre-selected hybrid driving condition.

3. The motor vehicle control system according to claim 2, wherein the pre-selected hybrid driving condition specifies a change from the electric driving operating status to the hybrid driving operating status.

4. The motor vehicle control system according to claim 3, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as output signals (28), which are processed in the second sub-module (29).

5. The motor vehicle control system according to claim 2, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

6. The motor vehicle control system according to claim 1, wherein the first sub-module (27) of the operating status prescription module (17) reads, as data from the functional components, at least one of the following input signals:

a) condition data (18) on drivability;

b) condition data (19) for minimum fuel consumption and minimum emissions;

c) vehicle-specific condition data (20); and

d) drivetrain-specific condition data (21).

7. The motor vehicle control system according to claim 6, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

8. The motor vehicle control system according to claim 6, wherein the drivetrain-specific condition data (21) includes one of current actual drivetrain values and drivetrain configuration data.

9. The motor vehicle control system according to claim 1, wherein the first sub-module (27) of the operating status prescription module (17) reads, as data from the functional components, at least one of the following input signals:

a) condition data (18) on drivability;

b) condition data (19) for minimum fuel consumption and minimum emissions;

c) vehicle-specific condition data (20); and

d) drivetrain-specific condition data (21);

the vehicle-specific condition data (20) includes at least one of a driver'"'"'s wish data, driving speed data, driving situation data and selector element data; and

the drivetrain-specific condition data (21) includes at least one of current actual drivetrain values and drivetrain configuration data.

10. The motor vehicle control system according to claim 9, wherein

the condition data (18) on drivability includes one of a sporty response datum and data on whether the electric motor can achieve a driving requirement;

and

the condition data (19) for minimum fuel consumption and minimum emissions includes one of engine temperature data, battery charge status data and emission data.

11. The motor vehicle control system according to claim 1, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

12. The motor vehicle control system according to claim 1, wherein the actuator sub-component (10) of the hybrid functional component (4) actuates the electric motor and the clutch connected between the electric motor and the internal combustion engine.

13. The motor vehicle control system according to claim 1, wherein the actuator sub-component (10) of the hybrid functional component (4) actuates only the electric motor and the clutch connected between the electric motor and the internal combustion engine.

14. A motor vehicle control system for controlling a motor vehicle with a hybrid drive comprising an internal combustion engine and an electric motor, the vehicle control system comprising:

a plurality of functional components each divided into at least three sub-components; and

the at least three sub-components comprising a strategy sub-component (8), a control sub-component (9) and an actuator sub-component (10);

the plurality of functional components including at least;

an internal combustion engine functional component (2) for controlling the internal combustion engine,

a transmission functional component (3) for controlling a transmission, and

a hybrid functional component (4) for controlling the electric motor and a clutch connected between the internal combustion engine and the electric motor;

wherein the strategy sub-component (8), of the hybrid functional component (4), comprises an operating status prescription module (17) which reads in a first quantity of data (18, 19, 20, 21) from functional components in order to determine a prescribed value for an operating status of the hybrid drive;

the operating status prescription module (17) comprises a first sub-module (27) and a second sub-module (29);

the first sub-module (27) processes the first quantity of data in order to produce a second quantity of output variables (28);

the second sub-module (29) determines the prescribed value for the operating status of the hybrid drive using the output variables (28) from the first sub-module (27); and

the second quantity of output signals (28), from the first sub-module (27) of the operating status prescription module (17), is smaller than the first quantity of data (18, 19, 20, 21) read by the first sub-module (27) from the functional components.

15. The motor vehicle control system according to claim 14, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

16. The motor vehicle control system according to claim 14, wherein the second sub-module (29) of the operating status prescription module (17) determines, as the prescribed value for the operating status of the hybrid drive, one of the following operating conditions:

a) electric driving with the electric motor coupled to the drive output and the internal combustion engine static and decoupled from the drive output;

b) electric driving with the electric motor coupled to the drive output and the internal combustion engine running but decoupled from the drive output;

c) hybrid driving with the electric motor coupled to the drive output and the internal combustion engine running and also coupled to the drive output; and

d) a pre-selected hybrid driving condition.

17. The motor vehicle control system according to claim 16, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

18. The motor vehicle control system according to claim 16, wherein the pre-selected hybrid driving condition specifies a change from the electric driving operating status to the hybrid driving operating status.

19. The motor vehicle control system according to claim 18, wherein the first sub-module (27) of the operating status prescription module (17) emits Boolean parameters, as the smaller second quantity of output signals (28), which are processed in the second sub-module (29).

20. A motor vehicle control system for controlling a motor vehicle with a hybrid drive comprising an internal combustion engine and an electric motor, the vehicle control system comprising:

a plurality of functional components, each divided into at least three sub-components;

the at least three sub-components comprising a strategy sub-component (8), a control sub-component (9) and an actuator sub-component (10);

the plurality of functional components including at least

an internal combustion engine functional component (2) for controlling the internal combustion engine,

a transmission functional component (3) for controlling a transmission and

a dedicated hybrid functional component (4) for controlling only the electric motor and a clutch connected between the internal combustion engine and the electric motor such that;

the strategy sub-component (8), of the hybrid functional component (4), comprises an operating status prescription module (17) which reads in a first quantity of data from functional components in order to determine a prescribed value for the operating status of the hybrid drive;

wherein the operating status prescription module (17) comprises a first sub-module (27) and a second sub-module (29);

the first sub-module (27), processes the first quantity of data in order to produce a second quantity of output variables;

the second sub-module (29) utilizes the output variables from the first sub-module (27) to determine the prescribed value for the operating status of the hybrid drive;

the strategy sub-component of each functional component determines at least one prescribed value for the control sub-component of the respective functional component, and determines data for influencing the strategy sub-component of at least one other functional component and the control sub-component of at least one other functional component;

the control sub-component of each functional component checks each prescribed value provided by the strategy sub-components of the respective functional components and determines at least one target value for the respective functional components, and determines data for influencing one of the strategy sub-component for the respective functional component and the control sub-component of at least one other functional component, and the sub-component feeds back at least one current actual parameter value to the strategy sub-component of the respective functional component; and

the actuator sub-component, of each functional component implements each target value, feeds back at least one current actual parameter value to the control sub-component of the respective functional component.