Vehicle Display Controller for Real-Time Power Limit Indication
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Solution Overview
Problem
Existing vehicle display systems for electrified vehicles, such as battery electric vehicles, face challenges in accurately indicating instantaneous power delivery as a proportion of powertrain capability due to temporary or fault conditions that reduce powertrain availability, leading to misleading power indicators.
Innovation Solution
A controller for a vehicle display system that receives data on powertrain limitations, determines if conditions meet predetermined criteria, and outputs signals to display these limitations only when relevant, using inputs from battery discharge capability, traction power, and traction torque, with adjustable thresholds based on operating parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the display system continuously shows powertrain capability indicator, then the driver receives constant power information, but the indicator becomes misleading when powertrain availability is reduced due to faults or temporary conditions
Solution Approach 1:
The display system dynamically adjusts its behavior based on powertrain operating conditions. The controller monitors powertrain availability and temporarily modifies the display output when limitations are detected, rather than maintaining a fixed display mode. This dynamic adaptation ensures information accuracy while maintaining system reliability.
Solution Approach 2:
The system changes the display parameter (power capability indication) based on detected powertrain conditions. When a powertrain limitation is detected, the controller modifies what is displayed to reflect the actual available power, preventing misleading information while maintaining continuous operation.
2Loss of information
If the system displays all powertrain limitations, then complete information is provided to the driver, but unnecessary driver distraction occurs from showing non-critical limitations
Solution Approach 1:
The display system applies different display qualities to different limitation conditions. Critical limitations that affect powertrain availability are displayed prominently, while non-critical limitations are either suppressed or displayed with reduced prominence. This selective display approach provides necessary information while minimizing driver distraction.
Solution Approach 2:
The system performs partial display action by selectively showing only those limitations that meet predetermined criteria for affecting powertrain availability. Rather than displaying all detected limitations equally, the controller filters the information to show only the relevant subset, reducing unnecessary visual noise for the driver.
3Measurement precision
If the display system shows instantaneous power delivery as proportion of power capability, then real-time power information is provided, but the display becomes inaccurate when power capability is reduced by electrical component faults
Solution Approach 1:
The controller implements a feedback mechanism that monitors powertrain operating conditions and uses this information to adjust the display output. When electrical component faults or other limitations are detected, the system receives feedback about the reduced capability and modifies the power delivery indication accordingly, maintaining measurement accuracy despite system complexity.
Data Source
AI summary
A vehicle display system is configured to display instantaneous power delivery of a powertrain of the vehicle as a proportion of the instantaneous power capability of the powertrain. A controller for the vehicle display system comprises an input configured to receive data relating to a condition indicative of a limitation on the instantaneous power delivery and/or power capability, a processor configured to determine from the data whether the condition meets at least one predetermined criterion and an output configured to output a signal to display the limitation in relation to the instantaneous power capability of the powertrain when the condition meets the at least one predetermined criterion.