Vehicle Motor Control Bus Diagnostic Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing safety protection methods for electric motor vehicles are inefficient and disruptive, as they require deactivating the data communication bus during tests, which takes time and interferes with other devices connected to it, posing a challenge in ensuring reliable safety protection without disrupting vehicle operations.
Innovation Solution
A diagnostic method that involves disabling the control driver of the data communication bus and transmitting a unique signal frame, allowing the control unit to read signals and issue a positive safety diagnosis without affecting normal operations, ensuring the electric motor can be safely controlled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data communication bus is deactivated during safety tests, then safety testing can be performed, but it takes time and interferes with other devices connected to the bus
Solution Approach 1:
The patent extracts the safety test function from the bus deactivation process. Instead of deactivating the entire data communication bus to perform safety tests, the system isolates and tests only the critical safety-related communication paths between the electronic control unit and the control driver. This allows safety verification without disrupting normal bus operations or causing time delays for full bus deactivation and reactivation.
2Reliability
If the data communication bus is deactivated during safety tests, then safety testing can be performed, but it interferes with other devices connected to the bus
Solution Approach 1:
The patent segments the safety testing function from the overall data communication bus operations. It creates a dedicated safety verification pathway that tests only the essential control signals between the electronic control unit and control driver, while leaving the rest of the bus network operational. This segmentation allows other devices connected to the bus to continue functioning normally during safety tests.
3Reliability
If traditional safety protection methods are used, then safety can be ensured, but the methods are inefficient and disruptive to normal operations
Solution Approach 1:
The patent implements preliminary safety verification by continuously monitoring and testing the communication integrity between the electronic control unit and control driver during normal operations. Rather than performing disruptive safety tests after problems occur or by deactivating the bus, the system proactively verifies safety-critical communication paths in real-time, ensuring safety protection without interrupting vehicle productivity.
Data Source
AI summary
A diagnostic method for a control device of a motor vehicle with an electric propulsion motor, including: an electronic control unit (500); a data communication bus (Tx; Rx) connecting at least the electronic control unit (500) and a controller of the electric motor; and a controller (510) of the data communication bus (Tx; Rx); includes the following steps:the disabling of the controller (510) of the data communication bus (Tx; Rx) by the electronic control unit (500),the transmission by the electronic control unit of a signal frame on the data communication bus (Tx; Rx),the reading by the electronic control unit of the signals traveling along the data communication bus (Tx; Rx), andthe issue of the positive safety diagnosis if the signal frame is not read by the electronic control unit.