Dual-Battery Vehicle Control for Automatic Ignition Restart
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Solution Overview
Problem
In tire testing with vehicles equipped with automatic driving functions, transitioning from an ignition-off state to an ignition-on state for data collection is manually time-consuming, affecting testing efficiency.
Innovation Solution
A vehicle control system with a first power supply for the power source and a second power supply for the automatic driving unit, allowing automatic transition from ignition-off to ignition-on states, eliminating the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual activation of the power supply is used to transition from ignition-off state to ignition-on state, then the vehicle can be restarted, but the testing efficiency is reduced due to time-consuming manual operations
Solution Approach 1:
The system enables automatic self-service by detecting when the vehicle enters the ignition-off state and automatically restarting the power source after a predetermined time period without requiring manual intervention. The control unit monitors the ignition state and autonomously manages the power supply transition, making the system serve itself rather than requiring external manual operation.
Solution Approach 2:
The control unit is pre-programmed with the logic to detect ignition-off states and initiate automatic restart sequences. The system prepares the automatic driving processing unit and power supply in advance to execute the restart operation automatically when conditions are met, eliminating the need for manual activation during the testing process.
2Measurement precision
If the first power supply is turned off during ignition-off state to stop power supply to the power source, then drive noise is eliminated for accurate noise measurement, but the automatic driving function cannot operate without power
Solution Approach 1:
The power supply system is segmented into two independent power supplies: the first power supply for the power source (engine/motor) and the second power supply for the automatic driving processing unit. This segmentation allows the first power supply to be turned off for accurate noise measurement while the second power supply continues to provide power to maintain automatic driving operations, resolving the contradiction between noise measurement accuracy and automatic driving functionality.
Solution Approach 2:
The second power supply acts as an intermediary that bridges the gap between the ignition-off state requirements and automatic driving needs. It provides the necessary power to the automatic driving processing unit when the first power supply is off, enabling the system to maintain automatic driving capabilities during noise measurement phases without compromising measurement accuracy.
Data Source
AI summary
A vehicle control system 100 according to the present disclosure comprises a first battery 11 that supplies power to a power source that drives the vehicle 1; an automatic driving processing unit 13 that provides the automatic driving function; and a second battery 12. The second battery 12 supplies power to the automatic driving processing unit 13 in the ignition-off state. Further, the second battery 12 supplies power to the first battery 11 to activate the first battery 11 when the vehicle is transitioned from the ignition-off state to an ignition-on state.