Drive system, motor vehicle, and method for operating a drive system

Abstract

A drive system for driving a motor vehicle has an internal combustion engine and an operating mode coordination device for determining and controlling the operating mode of the internal combustion engine. The drive system has a function coordination device for coordinating secondary functions of the drive system, the function coordination device being designed for generating, based on the coordination of the secondary functions, an operating mode request for the operating mode coordination device for controlling the operating mode of the internal combustion engine, and transmitting it to the operating mode coordination device. The invention further relates to a motor vehicle having a drive system, and a method for operating a drive system of a motor vehicle.

Claims

1. A drive system for driving a motor vehicle, comprising: an internal combustion engine, an operating mode coordination device for determining and controlling an operating mode of the internal combustion engine, a function coordination device for coordinating secondary functions of the drive system, the function coordination device being designed for: generating, based on the coordination of the secondary functions, an operating mode request for the operating mode coordination device for controlling the operating mode of the internal combustion engine, and transmitting the operating mode request to the operating mode coordination device, wherein the function coordination device is designed for prioritizing secondary functions and operating modes of the internal combustion engine, and wherein the prioritization of the secondary functions takes place as a function of an instantaneous operating mode and/or a predicted operating mode, wherein the secondary functions obtain a higher prioritization when they can be carried out in the predicted operating mode which is pending.

2. The drive system according to claim 1, wherein the function coordination device is designed for coordinating a diagnostic function of the drive system as the secondary function.

3. The drive system according to claim 2, wherein the function coordination device is designed for coordinating a sensor diagnostics unit of a sensor of a catalytic converter of the motor vehicle and/or a sensor diagnostics unit of a sensor of an injection line and/or a purge system diagnostics unit of a purge system of a fuel tank of the motor vehicle as the diagnostic function.

4. The drive system according to claim 1, wherein the function coordination device is designed for coordinating an adaptation function of a basic function of the internal combustion engine, in particular balancing of fuel quantities for cylinders of the internal combustion engine, as the secondary function.

5. The drive system according to claim 1, wherein the function coordination device is designed for coordinating venting of a fuel tank of the motor vehicle and/or mixture adaptation and/or catalytic converter heating and/or particle filter heating and/or particle filter regeneration and/or checking the fuel system and/or monitoring lambda control deviations as the secondary function.

6. A motor vehicle having a drive system, wherein the drive system is designed according to claim 1.

7. A method for operating a drive system of a motor vehicle according to claim 6, having the following steps: determining an operating mode of the internal combustion engine by means of the operating mode coordination device, determining the operating mode of the internal combustion engine by means of the function coordination device, determining, by means of the function coordination device, secondary functions of the drive system that are to be executed, prioritizing the determined secondary functions by means of the function coordination device, generating an operating mode request for the operating mode coordination device by means of the function coordination device, based on the prioritization, relaying the operating mode request to the operating mode coordination device by means of the function coordination device, implementing the operating mode request by the operating mode coordination device, and enabling the execution of at least one secondary function by the function coordination device, based on the prioritization and the instantaneous operating mode of the drive system.

8. The method according to claim 7, wherein, in the generation of the operating mode requests by means of the function coordination device, potential operating modes for executing the prioritized secondary functions are compared to one another, and an operating mode request is generated that also takes into account the execution of lower-priority secondary functions.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) A drive system according to the invention, a motor vehicle according to the invention, and a method according to the invention are explained in greater detail below with reference to the drawings, which schematically show the following:

(2) FIG. 1 shows a structure of one preferred embodiment of a drive system according to the invention,

(3) FIG. 2 shows a side view of one preferred embodiment of the motor vehicle according to the invention, and

(4) FIG. 3 shows a flow chart of one preferred embodiment of the method according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

(5) Elements having identical functions and operating principles are provided with the same reference numerals in each of FIGS. 1 through 3.

(6) FIG. 1 schematically illustrates a structure of one preferred embodiment of the drive system 1 according to the invention. The drive system 1 has an operating mode coordination device 4 for relaying an operating mode control command 14 to operating mode actuators 15 of the drive system 1. The operating modes of the drive system 1 are settable via the operating mode actuators 15. In this exemplary embodiment, the operating mode coordination device 4 is designed for relaying the instantaneous operating mode of the drive system 1 to a function coordination device 5 of the drive system 1 by an operating mode transmission unit 13. Alternatively or additionally, the function coordination device 5 may be used for independently determining the operating mode, for example via a direct connection to a sensor system and/or at least one operating mode actuator 15 of the drive system 1. Multiple secondary functions 6 such as diagnostic functions 8, adaptation functions 9, or other secondary functions 10 are executable in the drive system 1. The secondary functions 6 are designed for relaying a request 11 to the function coordination device 5 for the desired execution of the particular secondary function 6. The function coordination device 5 is designed for coordinating the requests 11 and for generating an operating mode request 7 based on the coordination of the requests 11. In addition, the function coordination device 5 is designed for relaying the operating mode request 7 to the operating mode coordination device 4. Furthermore, the function coordination device 5 is designed for transmitting an enabling instruction 12 to the corresponding secondary functions 6 as a function of the instantaneous operating mode and the coordination of the requests 11, so that the particular secondary function 6 is executable.

(7) FIG. 2 schematically illustrates one preferred embodiment of the motor vehicle 2 according to the invention with a drive system 1 according to the invention, in a side view. The drive system 1 has an internal combustion engine 3, an operating mode coordination device 4, and a function coordination device 5.

(8) FIG. 3 shows a flow chart of one preferred embodiment of the method according to the invention. An operating mode of the internal combustion engine 3 is determined by means of the operating mode coordination device 4 in a first method step 100. The operating mode of the internal combustion engine 3 is determined by means of the function coordination device 5, for example by communication with the operating mode coordination device 4 and/or querying of sensors or operating mode actuators 15, in a second method step 200. Secondary functions 6 of the drive system 1 that are to be executed are determined by means of the function coordination device 5 in a third method step 300, for example by accepting a request 11 for the secondary function 6 and/or according to a predefined secondary function plan. The determined secondary functions 6 are prioritized, for example based on the importance of the secondary function 6 and/or the executability in the instantaneous operating mode, in a fourth method step 400 by means of the function coordination device 5. An operating mode request 7 for the operating mode coordination device 4 is generated in a fifth method step 500 by means of the function coordination device 5, based on the prioritization. The operating mode request 7 is relayed to the operating mode coordination device 4 in a sixth method step 600 by means of the function coordination device 5. The operating mode request 7 is implemented in a seventh method step 700 by means of the operating mode coordination device 4. An enabling instruction 12 for executing at least one secondary function 6 is authorized in an eighth method step 800 by means of the function coordination device 5 based on the prioritization and the instantaneous operating mode of the drive system 1, and is transmitted to the particular secondary function 6.

LIST OF REFERENCE NUMERALS

(9) 1 drive system 2 motor vehicle 3 internal combustion engine 4 operating mode coordination device 5 function coordination device 6 secondary function 7 operating mode request 8 diagnostic function 9 adaptation function 10 other secondary function 11 request 12 enabling instruction 13 operating mode transmission unit 14 operating mode control command 15 operating mode actuator