Vehicle State Monitoring Using Distance-Based Engine Load Histograms
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Solution Overview
Problem
Conventional vehicle state monitoring devices face limitations in storing information over long periods due to limited storage capacity, necessitating frequent updates that reduce the duration for which data can be retained.
Innovation Solution
The vehicle state monitoring device employs a storage control mechanism that stores frequency relations between engine revolutions, fuel-related parameters, and vehicle speed at predetermined distances, allowing for reduced data storage while determining engine deposit accumulation and overheating causes, thereby minimizing the amount of information required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If information is stored in the storage device at each predetermined time interval, then the storage device can maintain updated information, but the information cannot be stored longer than the predetermined time due to limited storage capacity
Solution Approach 1:
The patent changes the storage parameter from time-based (storing at each predetermined time interval) to distance-based (storing at each predetermined distance). This allows the system to retain data for longer periods while maintaining relevant update frequency, as distance-based sampling naturally reduces the number of storage operations over long time periods while still capturing meaningful changes in vehicle operation patterns.
Solution Approach 2:
The patent extracts only the essential operational parameters (engine revolutions, fuel-related parameters, and running frequency relations) rather than storing all possible vehicle data. By focusing on extracting and storing only the frequency relations between these key parameters at predetermined distance intervals, the system achieves long-term data retention with minimal storage requirements.
2Duration of action of stationary object
If information is held without updating to extend storage duration, then the data retention period increases, but the storage capacity becomes insufficient
Solution Approach 1:
The patent implements periodic action by storing frequency relation information at predetermined distance intervals rather than continuously or at every time interval. This periodic distance-based sampling allows the system to extend data retention period while controlling the quantity of stored information, as only specific snapshots of operational data are retained based on distance milestones.
Solution Approach 2:
The patent changes the fundamental storage parameter from time-based updating to distance-based updating. This parameter change enables the system to hold information for extended periods by storing data only when the vehicle travels predetermined distances, thereby extending the data retention period without proportionally increasing the quantity of stored information.
3Loss of information
If time-series data of engine revolutions and fuel-related parameters are stored without change, then complete operational history is preserved, but the amount of information stored becomes large
Solution Approach 1:
The patent extracts and stores only the essential frequency relations between engine revolutions, fuel-related parameters, and running frequency at predetermined distance intervals. By taking out only these critical relational patterns rather than storing complete time-series data, the system preserves the essential operational history information while dramatically reducing the total data volume stored.
Solution Approach 2:
The patent changes the data representation from detailed time-series records to aggregated frequency relation data based on distance intervals. This parameter transformation condenses extensive time-series information into compact frequency relation snapshots, maintaining the essential operational history while minimizing the quantity of stored information.
Data Source
AI summary
A vehicle state monitoring device includes a storage device configured to store information relating to a vehicle traveling under power from an engine; a determining device configured to determine a state of the vehicle using the information stored in the storage device; and a storage control device. The storage control device is configured to, each time the vehicle travels a predetermined distance, store a frequency relation as the information in the storage device. The frequency relation is a relation between revolutions of the engine, a fuel-related parameter that is a load factor or a fuel injection rate of the engine, and a running frequency of the engine at the revolutions and the fuel-related parameter while the vehicle travels the predetermined distance.