Integrated ECU Startup Control for Early Auxiliary Battery Sensing
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Solution Overview
Problem
The increased number of in-vehicle ECUs in modern vehicles leads to extended startup times due to high power consumption and dark currents, causing battery exhaustion and reduced fuel efficiency.
Innovation Solution
A vehicle control system with an integrated ECU that secures communication and activates an auxiliary battery sensor in parallel with other ECUs, allowing early detection of battery state and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of high-performance microcomputers are mounted on in-vehicle ECUs, then vehicle functionality and sophistication are improved, but power consumption and dark currents increase causing battery exhaustion
Solution Approach 1:
The integrated ECU performs preliminary actions by securing communication and activating the auxiliary battery sensor in parallel during vehicle startup, enabling early detection of battery state before full system initialization. This allows the system to prepare charging operations in advance, mitigating the power consumption issue caused by multiple high-performance microcomputers.
2Reliability
If multiple in-vehicle ECUs are activated sequentially, then communication stability is ensured, but startup time is extended
Solution Approach 1:
The integrated ECU performs preliminary activation of the auxiliary battery sensor in parallel with other ECU activations, rather than waiting for sequential communication setup. This preliminary action enables early battery state detection without compromising communication stability, thereby reducing startup time.
Solution Approach 2:
The auxiliary battery sensor acts as an intermediary component that can be activated independently and in parallel with other ECUs. It provides battery state information to the integrated ECU without requiring full system communication setup, thus reducing startup time while maintaining communication reliability.
3Use of energy by stationary object
If sequential activation of ECUs is performed, then power consumption is controlled, but battery state detection is delayed
Solution Approach 1:
The auxiliary battery sensor is activated in parallel with other ECUs during the preliminary phase of startup, enabling early battery state detection. The integrated ECU then uses this early information to control power consumption by managing charging operations appropriately, rather than waiting for sequential activation.
Data Source
AI summary
A vehicle control system includes: in-vehicle ECUs provided according to positions within a vehicle or functions of the vehicle; and an integrated ECU configured to control the in-vehicle ECUs, the in-vehicle ECUs include an ECU capable of communicating with an auxiliary battery sensor configured to detect a state of an auxiliary battery, the auxiliary battery sensor is configured to transmit the state of the auxiliary battery to the integrated ECU via the ECU capable of communicating with the auxiliary battery sensor, and when starting the vehicle, the integrated ECU secures communication in the vehicle, and activates the ECU capable of communicating with the auxiliary battery sensor, and starts communication of the auxiliary battery sensor in parallel.