| 摘要 |
The electronic control unit has a first hardware module (2) fitted with a microcomputer (3) that operates with a software program. A bus system (4) having at least one address bus (6), one data bus (5) and one control bus (7) is likewise mounted on a mother board of the first hardware module (2). The electronic control unit has at least one second hardware module (8, 9), which can be connected to the first hardware module (2) using a detachable electrical connection (10, 11). At least one of the second hardware modules (8, 9) is preferably designed as a data carrier card in PCB format and contains electronic storage elements (12, 13, 14, 15, 16). When the two hardware modules (2, 8, 9) are connected together the storage elements (12, 13, 14, 15, 16) of at least one of the second hardware modules (8, 9) are connected directly to the bus system (4) of the first hardware module (2). The storage elements (12, 13) of at least one of the second hardware modules (8, 9) contain the entire software program for the microcomputer (3). This has the advantage that, if the control unit fails, the first hardware module (2) is simply replaced and operation may continue with at least one of the second hardware modules (8, 9) of the control unit that contains the software. In this way control function is maintained with absolutely the same program code and absolutely the same operating data. |
