DE102018126493A1 - Method for updating software of a control unit of a hybrid vehicle - Google Patents

Abstract

The invention relates to a method for updating software in a control unit of a hybrid vehicle, in which the current software (1, 2) is transmitted wirelessly to the vehicle. In one method, the hybrid vehicle is located at a first location which is located remotely from a second location at which the software for a hybrid drive system (12) of the hybrid vehicle is developed, the current software (1, 2 ) wirelessly encrypted is sent to an on-board unit (8) of the hybrid vehicle, which supplies the current software (1, 2) to a predetermined control unit (11) in the hybrid vehicle for updating the software

Description

The invention relates to a method for updating software in a control unit of a hybrid vehicle, in which the current software is transmitted wirelessly to the vehicle.

The US 2007/0185624 A1 discloses a method for remote reprogramming of a flash memory of a control device of a vehicle, in which the new program is transmitted wirelessly to the vehicle, where it is received by a second control device of the vehicle, which is not to be programmed.

From the US 2013/0079950 A1 A vehicle upgrade system and a method for updating vehicle storage data are known, in which the data currently to be stored are transmitted to the vehicle from a telematics server.

Nowadays, there are different development locations for vehicle development that work on the same vehicle development, but are spatially far apart. It often happens that software developers are centralized at a different location than the development units that manufacture the vehicle components or the vehicle.

In hybrid drive systems, the hybrid module consists of an actuator control unit and a power control unit of the actuator, the software of which is to be transmitted in different development phases of the hybrid vehicle to a hybrid vehicle that is on a test drive or at a third party.

The invention is based on the object of specifying a method for updating software in a control unit of a hybrid vehicle, in which the software is implemented inexpensively and nevertheless reliably.

According to the invention, the object is characterized in that the hybrid vehicle is located at a first location, which is located remotely from a second location at which the software for a hybrid drive system of the hybrid vehicle is developed, the current software developed at the second location being wirelessly encrypted is sent to a receiving unit of the hybrid vehicle, which forwards the current software to a predetermined control unit in the hybrid vehicle for updating the software. This has the advantage that only one on-board unit of the hybrid vehicle is necessary in order to process the wirelessly transmitted updated software in the hybrid vehicle located at another location and to monitor the software update in this location. The encryption of the current software makes it difficult for third parties to access the current software.

The current software is advantageously combined into a software package prior to transmission to the hybrid vehicle. that is sent to the hybrid vehicle via an Internet. By combining the present software complexes to form a software package, the transmission time is reduced since the assignment of the software to the specified control unit only has to be carried out once by the on-board unit and the individual software complexes can be loaded one after the other into a memory of the control unit.

In one configuration, the on-board unit forwards the received current software to the specified control unit via a data line of the hybrid vehicle. This reduces the material expenditure on auxiliary devices, since no direct line connection has to be made to the specified control unit.

In one variant, a test bench is used as the on-board unit, which communicates with the hybrid vehicle directly via the data line of the hybrid vehicle. Such test benches are sufficiently available both in vehicle development and in workshops, which is why additional hardware for updating software data in the hybrid vehicle can be dispensed with.

The invention permits numerous exemplary embodiments. One of these will be explained in more detail with reference to the figures shown in the drawing.

• 1 einen Prinzipablauf des erfindungsgemäßen Verfahrens,
• 2 ein Ausführungsbeispiel zur Durchführung des erfindungsgemäßen Verfahrens.

Show it:

• 1 a basic sequence of the method according to the invention,
• 2nd an embodiment for performing the method according to the invention.

In 1 a basic sequence of the method according to the invention is shown. The first step of the process is in block 100 created a new software update for a hybrid drive of a hybrid vehicle. The software developer has no direct access to the desired control unit of the hybrid vehicle to which the software update is to be installed, since the hybrid vehicle is located at a different location in a different location (block 110 ). For communication with the software manufacturer, a telematics unit is arranged at the location of the hybrid vehicle (block 120 ). In the block 130 the software manufacturer sends a summarized software package wirelessly from the first location to the telematics unit of the second location and controls in the block 140 the software update via an Internet. The software manufacturer receives access to the desired control unit of the hybrid vehicle via manufacturer-specific encryption (block 150 ). The software manufacturer starts the software update in a block 160 according to a specific update template from the vehicle manufacturer. After the software update is completed, the software manufacturer receives in the block 170 a report wirelessly via the telematics unit.

2nd shows an embodiment for performing the method according to the invention. At the first location of the software manufacturer, software complexes are developed during the development phase of the hybrid drive train, for example for a transmission unit comprising a clutch 1 , 2nd for a transmission control unit and / or a clutch control unit newly developed and released, which are to be transferred to the test hybrid vehicle located at the second location. These new software complexes 1 , 2nd are in a database 4th where other software complexes already 3rd are stored, combined into a software package, which via a first telematics unit 5 wireless and encrypted over the Internet 6 to the second telematics unit 7 is sent. The telematics unit 7 passes the received software package to an in-vehicle diagnostic unit 8th next, which to a data bus 9 of the hybrid vehicle is connected. With the data bus 9 of the hybrid vehicle are different control units 10th , 11 connected, the control unit 11 Part of the hybrid drive system 12th of the hybrid vehicle. After in 1 The procedure shown in the software package can be in the control unit 11 transmitted, the software update from the software manufacturer over the Internet 6 is monitored. Via the internet 6 the software manufacturer also receives a report on the success of the software updates, which is provided by the second telematics unit 7 to the first telematics unit 5 is transmitted.

The hybrid vehicle to be provided with the new software package can be on a test drive or in a workshop where the control unit 11 via a test bench with the second telematics unit 13 connected is.

Reference list

1

new software complex

2nd

new software complex

3rd

existing software complex

4th

Database

5

Telematics unit

6

Internet

7

Telematics unit

8th

Diagnostic unit

9

Data bus

10th

Control unit

11

Control unit

12th

Hybrid drive system

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 2007/0185624 A1 [0002]
• US 2013/0079950 A1 [0003]

Claims (4)

Method for updating a software of a control unit of a hybrid vehicle, in which the current software (1, 2) is transmitted wirelessly to the vehicle, characterized in that the hybrid vehicle is at a first location, which is from a second location, at which the software is developed for a hybrid drive system (12) of the hybrid vehicle, is arranged remotely, the current software (1, 2) developed at the second location being sent wirelessly encrypted to an on-board unit (8) of the hybrid vehicle, which is the current software (1, 2) a predetermined control unit (11) in the hybrid vehicle for updating the software. Procedure according to Claim 1 , characterized in that the current software (1, 2) is combined before transmission to the hybrid vehicle to form a software package which is sent to the hybrid vehicle via an Internet (6). Procedure according to Claim 1 or 2nd , characterized in that the on-board unit (8) forwards the received current software (1, 2) to the specified control unit (11) via a data line (9) of the hybrid vehicle. Procedure according to Claim 1 , 2nd or 3rd , characterized in that a test stand is used as the on-board unit (8) which communicates directly with the hybrid vehicle via the data line (9) of the hybrid vehicle.

Images