Electronic Switching Unit Low Consumption Mode Control
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Solution Overview
Problem
Existing systems fail to reliably activate a low-consumption mode in electronic switching units, leading to high power consumption due to faults in control software or hardware, particularly in battery-powered motor vehicles, where continuous energy drain is unnecessary.
Innovation Solution
A method involving a circuit-external power control unit that transmits an activation command and uses a measuring device to generate a consumption signal, checking if the operating current is reduced below a threshold, with emergency measures like switching off the unit if the threshold is not met, ensuring power reduction regardless of faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low-consumption mode is activated in an electronic switching unit, then power consumption is reduced, but reliability is compromised because the system cannot verify whether the mode was actually activated
Solution Approach 1:
The patent implements a feedback mechanism where the power control unit monitors the operating current of the electronic switching unit to verify whether the low-consumption mode was actually activated. The measuring device detects the operating current and provides feedback to the power control unit, which then determines whether the current has dropped below a threshold value indicating successful mode activation. This closed-loop feedback system resolves the contradiction by enabling verification of the low-consumption mode activation while maintaining the power reduction benefit.
Solution Approach 2:
The patent applies preliminary action by implementing safety measures before the system enters an unverified state. The power control unit is configured to switch off the electronic switching unit if it cannot verify that the low-consumption mode is active. This preliminary safety action prevents the system from operating in an undefined state where power consumption might not be reduced as expected, thereby maintaining reliability while still enabling power reduction when verification is successful.
2Reliability
If the electronic switching unit is continuously monitored to verify low-consumption mode activation, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by having the power control unit monitor the operating current at specific intervals rather than continuously. The system activates the low-consumption mode and then periodically checks whether the current has dropped below the threshold value. This periodic monitoring approach maintains reliability by verifying mode activation while minimizing power consumption by avoiding continuous monitoring during the low-consumption period.
3Ease of operation
If driver software controls the low-consumption mode, then ease of operation is improved, but reliability deteriorates because software errors can prevent mode activation
Solution Approach 1:
The patent introduces an intermediary mechanism - the power control unit with measuring device - that acts as a mediator between the driver software and the electronic switching unit. The power control unit independently verifies whether the low-consumption mode is active by monitoring the operating current, providing a hardware-based verification layer that is independent of the software's intentions. This intermediary approach maintains the ease of software control while improving reliability by detecting software failures that prevent proper mode activation.
Data Source
AI summary
The present disclosure relates to a method for controlling a low-consumption mode of an electronic switching unit, which is supplied with an electrical operating current via a current path, wherein a circuit-external power control unit transmits an activation command for activating the low-consumption mode to the switching unit. A measuring device for generating a consumption signal that is a function of an amperage of the operating current being operated in the current path is disclosed. After the activation command has been transmitted the power control unit uses the consumption signal to determine whether the amperage is still above a threshold value that is specified for the low-consumption mode, and in this case a predetermined emergency measure is initiated to force the low-consumption mode and/or to reduce the amperage.