Motor Vehicle On-Board Electrical System Dynamic Wake-Up Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern motor vehicle on-board electrical systems face significant energy consumption issues, particularly in standby mode, which can lead to battery discharge, and existing methods for switching between standby and operating modes are not robust against external influences or misuse, such as false wake-up events caused by accidental or malicious triggers.
Innovation Solution
A method that uses a sensor arrangement to detect wake-up operator control events, associating each event with a time interval and a switch-off indicator, where the control unit is woken up or remains in standby based on the time interval and switch-off threshold, reducing unwanted wake-ups by assessing the probability of intended operation through time interval analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control unit is woken up frequently to ensure responsive operation, then the system reliability is improved, but the energy consumption increases and battery discharge occurs
Solution Approach 1:
The patent implements dynamic wake-up behavior by introducing a switch-off indicator that adapts the control unit's wake-up responsiveness based on operational context. The control unit transitions between different operational states (fully operational, partially operational, switched off) depending on the switch-off indicator value, which increases after each wake-up event. This dynamic adaptation allows the system to balance responsiveness with energy conservation, waking up less frequently when not critically needed while maintaining reliability when necessary.
2Use of energy by moving object
If the control unit switches to standby mode to save energy, then the energy consumption is reduced, but the system becomes susceptible to external influences and misuse
Solution Approach 1:
The patent implements a feedback mechanism through the switch-off indicator that tracks wake-up events and adjusts system behavior accordingly. Each time the control unit wakes up from standby mode, the switch-off indicator is incremented, creating a feedback loop that monitors system activity. This feedback allows the system to learn from past wake-up patterns and adjust its standby behavior, reducing susceptibility to misuse by recognizing abnormal wake-up patterns while maintaining energy efficiency during normal operation.
Solution Approach 2:
The system performs preliminary assessment of wake-up events by evaluating the switch-off indicator before fully activating the control unit. This preliminary action allows the system to distinguish between legitimate wake-up requests and spurious external influences. By checking the switch-off indicator state before complete activation, the system can filter out false wake-up events caused by external interference, thereby maintaining robustness while in standby mode.
3Reliability
If the bus system is designed to wake up completely with each load activation, then the system reliability is improved, but the energy consumption increases significantly
Solution Approach 1:
The patent segments the control unit's operational states into distinct levels: fully operational mode, partially operational mode, and switched-off mode. This segmentation allows different parts of the system to be activated at different times based on need. Instead of always waking up the entire bus system with each load activation, the control unit can remain in a lower-power state while still providing essential functions, thereby reducing energy loss while maintaining necessary system functionality through selective activation of only critical subsystems.
Data Source
AI summary
A method for operating the electrical system of a motor vehicle having a control unit with an operating mode and an energy-saving standby mode is described. A wake-up operator control event is detected by a sensor and has an associated time interval from the preceding wake-up operator control event. The time interval is ascertained when a wake-up operator control event is detected, and the control unit is woken up or not woken up. Each wake-up operator control event has an associated switch-off indicator which is ascertained each time a wake-up operator control event is detected, and the control unit is woken up or not woken up as a function of the level of the switch-off indicator with reference to a switch-off threshold. A change in the current switch-off indicator relative to the preceding switch-off indicator is all the greater the smaller the current time interval.