Dynamic Start Condition Management for Vehicle ECU Power Control
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Solution Overview
Problem
Existing communication systems for vehicles struggle to easily change start conditions when nodes or applications within the system change, leading to inefficiencies in power management and network operations.
Innovation Solution
A communication system where each ECU can transition between normal and sleep states based on predetermined conditions, using a master ECU to determine and transmit start conditions to other ECUs via a CAN protocol, allowing for dynamic adjustment of wake-up states and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If start conditions are fixed in the program, then reliability is improved, but adaptability deteriorates
Solution Approach 1:
The patent makes the start conditions dynamic by allowing them to be changed from external storage media rather than being fixed in the program. The ECU can update start conditions by reading them from storage media, enabling the system to adapt to different operating environments and configurations while maintaining reliable operation through structured condition checking and transition control.
2Adaptability or versatility
If start conditions are changed frequently, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the start condition management by separating the condition data from the control program. Start conditions are stored in external storage media rather than being embedded in the ECU's fixed program, allowing independent updates of conditions without affecting the core control logic. This reduces the complexity burden on the ECU while enabling frequent condition changes.
3Reliability
If ECUs remain in normal state, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by allowing ECUs to transition between normal and sleep states based on evaluated start conditions. ECUs can enter sleep state to conserve energy when conditions permit, and wake up periodically or on-demand when specific conditions are met, such as receiving wake-up signals or meeting predetermined wake-up criteria. This balances energy savings with operational reliability.
Data Source
AI summary
A communication system, in which a plurality of nodes communicate with each other according to a communication protocol, which wakes up some of the plurality of nodes when a communication frame containing specific start information occurs on or is transmitted to the communication bus, includes a master node determines, for each of slave nodes, a start condition, which is a condition for transition of a subject node from a sleep state to a normal state. The master node transmits, to the communication bus, the determined start condition tailored for each of the slave nodes for a reception thereof by each of the slave nodes.