| 摘要 |
PURPOSE: A separated dual method for verifying the malfunction of an engine-control-unit(ECU) through information exchange is provided to improve the verification accuracy of the malfunction of a main-micro-control-unit(m-MCU) and a slave-micro-control-unit(s-MCU) by cross-checking the m-MCU and the s-MCU through serial peripheral interface(SPI) communication. CONSTITUTION: A m-MCU and a s-MCU calculate respective wheel speeds(S1, S10). The m-MCU transmits the calculated wheel speed to the s-MCU through communication exchange(S2, S12). The s-MCU transmits the calculated wheel speed to the m-MCU. If the communication exchange is abnormal, the malfunction of an ECU is verified(S3, S13). If the communication exchange is normal, exchanged wheel speed values are verified in the m-MCU and the s-MCU(S4, S14). If the exchanged wheel speed values are more than an allowable error value, the m-MCU and the s-MCU verifies the malfunction of the ECU. |
