Vehicle Bus Activity Monitoring for True Off State Detection
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Solution Overview
Problem
Current vehicle systems lack an effective true off mechanism, leading to inefficiencies in energy management and diagnostic accuracy, which complicates the determination of vehicle usage and performance metrics.
Innovation Solution
A method and system that determine the activity level of a vehicle bus, detect a running level, and generate a true off state for the engine, allowing for accurate calculation of vehicle usage by analyzing the activity level, vehicle speed, and revolutions per minute.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle system continuously monitors activity level to determine true off state, then diagnostic reliability is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic monitoring of the vehicle bus activity level rather than continuous monitoring. The control unit checks the activity level at defined intervals to detect when the vehicle transitions to a true off state, thereby reducing energy consumption while maintaining diagnostic reliability through regular status assessments.
Solution Approach 2:
The vehicle bus activity level monitoring leverages existing communication bus data that is already being transmitted for other vehicle functions. The control unit utilizes this existing data stream to determine true off state without requiring additional dedicated monitoring hardware or separate communication channels, thus minimizing additional energy consumption.
2Measurement precision
If the system accurately detects true off state by analyzing activity level, then vehicle usage calculation is improved, but system complexity increases
Solution Approach 1:
The control unit utilizes the existing vehicle bus activity level data, which serves multiple functions including diagnostic communications, control signals, and status reporting. By leveraging this multi-functional data stream for true off state detection, the system achieves accurate vehicle usage calculation without adding dedicated monitoring components that would increase system complexity.
Solution Approach 2:
The system determines true off state by monitoring changes in the activity level parameter of the vehicle bus over time. When the activity level transitions from active to inactive thresholds and remains below the threshold for a defined period, the system identifies this as a true off state. This parameter-based approach uses existing bus activity metrics rather than requiring new sensors or complex detection mechanisms.
Data Source
AI summary
A method of operation of a vehicle system comprising: determining an activity level of a vehicle bus; determining a running level for the activity level for a running period; detecting an off level for the activity level dropping from the running level; generating a true off state for an engine based on an off level; and calculating vehicle usage based on the true off state.