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

• US 8,290,655 B2
• Filed: 10/16/2008
• Issued: 10/16/2012
• 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: Fakler, Winfried, Amann, Notker, Mittelberger, Christian, Er, Mesut, Blattner, Stefan, Kaltenbach, Johannes, Wallner, Stefan
• Primary Examiner(s): FREJD, RUSSELL WARREN
• Application Number:
  US12/739,233
• Publication Number:
  US 20110166726A1
• Time in Patent Office: 1,461 Days
• Field of Search: 700/4, 701/1, 701/22, 701/99, 701/101, 701/102, 701/112, 701/113, 701/48, 180/54.1, 180/65.1, 180/65.265, 180/65.275, 180/65.28, 180/65.285, 180/65.29, 477/2, 477/3, 477/5, 477/6, 903/902, 903/903, 903/930, 903/946
• 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 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2050/0006 Digital architecture hierarchy
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A control system for controlling a vehicle with a hybrid drive comprising an internal combustion engine and an electric motor and a plurality of functional components each divided into strategy, control and actuator sub-components. The functional components include engine, transmission and hybrid functional components. The strategy sub-component of the hybrid functional component comprises an operating status prescription module which determines a recommended value for the operating status of the hybrid drive and transmits the recommended value to the control sub-component. The possible recommended value that can be determined by the operating status prescription module is a preselected hybrid driving condition, and if the operating status prescription module of the strategy sub-component transmits the preselected hybrid driving condition, as the recommended value, to the control sub-component, then the strategy sub-component prescribes a change from electric to hybrid driving, while the control sub-component determines when change occurs.

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,

a plurality of functional components, each of the functional components comprises at least three sub-components including a strategy sub-component (8), a control sub-component (9) and an actuator sub-component (10), the functional components at least including;

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, the strategy sub-component (8) of the hybrid functional component (4) comprises an operating status prescription module which determines a recommended value for the operating status of the hybrid drive and transmits the recommended value to the control sub-component (9) of the hybrid functional component (4), and a possible recommended value, that can be determined by the operating status prescription module, is a preselected hybrid driving condition, and, if the operating status prescription module of the strategy sub-component (8) of the hybrid functional component (4) transmits the preselected hybrid driving condition, as the recommended value, to the control sub-component (9) of the hybrid functional component (4), then the strategy sub-component (8) of the hybrid functional component (4) prescribes a change from an electric driving operating status to a hybrid driving operating status, and the control sub-component (9) of the hybrid functional component (4) determines a time when, and a manner in which, the change from the electric driving operating status to the hybrid driving operating status occurs.

2. The motor vehicle control system according to claim 1, wherein the strategy sub-component of each of the functional components is independent of specific drivetrain configurations of the motor vehicle such that the operating status prescription module of the strategy sub-component (8) of the hybrid functional component (4) transmits the recommended value, which is configuration-independent, to the control sub-component (9) of the hybrid functional component (4).

3. The motor vehicle control system according to claim 1, wherein the operating status prescription module of the hybrid functional component (4) determines, as the recommended value for the operating status of the hybrid drive, one of the following operating conditions:

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

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

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

d) the preselected hybrid driving condition.

4. The motor vehicle control system according to claim 1, wherein the control sub-components (9) of the functional components depend on the specific drivetrain configuration of the motor vehicle to generate a target value, which is configuration-dependent, from the recommended value, which is configuration-independent.

5. A motor vehicle control system for controlling a motor vehicle with a hybrid drive comprising:

an internal combustion engine and an electric motor;

an internal combustion engine functional component (2), which controls the internal combustion engine, a transmission functional component (3), which controls a transmission, and a hybrid functional component (4) which controls the electric motor and a clutch that is connected between the internal combustion engine and the electric motor;

each of the internal combustion engine functional component (2), the transmission functional component (3) and the hybrid functional component (4) comprises at least a strategy sub-component (8), a control sub-component (9) and an actuator sub-component (10);

the strategy sub-component (8) of the hybrid functional component (4) comprises an operating status prescription module which determines one recommended value for an operating status of the hybrid drive and transmits the one recommended value to the control sub-component (9) of the hybrid functional component (4), and if the one recommended value for the operating status of the hybrid drive is a preselected hybrid driving condition, then the strategy sub-component (8) of the hybrid functional component (4) prescribes a change of the hybrid functional component (4) from an electric driving operating status to a hybrid driving operating status, and the control sub-component (9) of the hybrid functional component (4) determines a time at which, and a manner in which, the change from the electric driving operating status to the hybrid driving operating status occur;

the actuator sub-component (10) of the hybrid functional component (4) is sub-divided into an electric motor sub-component (11) and a clutch sub-component (12);

the control sub-component (9) of the hybrid functional component (4) communicates with and transmits at least one actual parameter value to the strategy sub-component (8) of the hybrid functional component (4); and

the actuator sub-component (10) of the hybrid functional component (4) communicates with and transmits at least one actual parameter value to the control sub-component (9) of the hybrid functional component (4).