Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1996-08-20
1999-08-31
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701101, 701 29, 701 35, 340438, G06G 770
Patent
active
059447672
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and a device for controlling an internal combustion engine having a microprocessor and a memory. Specifically, the present invention relates to data records stored in the memory for controlling the engine.
BACKGROUND INFORMATION
A method and a device for controlling an internal combustion engine are disclosed by the German Published Unexamined Application DE-OS 37 23 024 (U.S. Pat. No. 5,138,548). It likewise describes a device for controlling an internal combustion engine in motor vehicles which contain at least one microprocessor. Multiple variants of data records are stored under various retrieval codes in at least one first memory device. Under this prior art, the addresses of the individual data records must be known and stored in a so-called vector field.
In addition, devices and methods are known whereby the complete data record or portions of the data record are programmed in at the end of the manufacturing. The inherent disadvantage of these known devices is that means must be provided for selecting the correct data record on the basis of the stored addresses where the data are stored.
It is desirable in this case to be able to use one control unit for a plurality of vehicle variables. This would make it possible to simplify the stocking of the control units. It should be possible to select the appropriate variables after the control unit is installed in the vehicle. Thus, it can be provided, for example, for vehicles of one type to be equipped with manual transmission or with automatic transmission, with or without an ASR (traction control system). Furthermore, different rating classes can also be variables.
Because an identifier code is stored at a defined location of each vehicle-specific data record, it is possible for the data records to be arranged arbitrarily in the physical memory. To access the data during later operation, e.g. to modify them, one simply needs to know the identifier and not the address in the memory.
Furthermore, mix-ups can be ruled out, particularly in customer service. Also, for a later generation of control units, it will be possible to store the data records at different addresses.
SUMMARY OF THE INVENTION
In an exemplary embodiment of the present invention, a device and method are provided for controlling an internal combustion engine having at least one microprocessor. At least two data records are stored in a first memory device and an identifier may be entered in preferred location within each data record. Further, a selection value may be stored in a second memory device. Specific data records may be selected by the microprocessor using the identifier and the selection value. As a result, the variable coding is simplified
BRIEF DESCRIPTION OF THE DRAWINGS
One exemplary embodiment of the invention is elucidated on the basis of the drawings.
FIG. 1 shows a block diagram of a control unit in accordance with the invention;
FIG. 2 the structure of the data stored in the control unit; and
FIG. 3 a flow chart of the method according to the invention.
DETAIL DESCRIPTION
The control scheme of the sort described here involves an electronic control with at least one microprocessor, and at least one first and second memory device. These control units are installed at the appropriate location during manufacture of a vehicle. The control units are identical for various vehicle types and models. They contain calculation programs, e.g. for various engine control data, such as the fuel quantity to be injected, as well as a program for selecting the data required for the calculation programs. These so-called basic programs are stored in a permanently programmed memory of the control unit.
At the end of a motor vehicle assembly line, the user of the control unit, the motor vehicle manufacturer, can input the vehicle-specific data into the freely programmable memory of the control unit. To do this, there is no need to open the control unit, which is sealed off hermetically to protect it from external infl
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Eberlein Edwin
Forster Felix
Gerstung Ulrich
Illg Bernd
Newald Josef
Louis-Jacques Jacques H.
Robert & Bosch GmbH
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