Automatic Transmission Shift Anomaly Diagnosis Using Racing Amount Patterns
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Solution Overview
Problem
Existing vehicle anomaly analysis systems face challenges in accurately identifying the cause of anomalies in shift control operations of automatic transmissions, as abnormal rotational speed changes can be caused by different issues, making it difficult to determine the specific reason for the anomaly.
Innovation Solution
A vehicle anomaly analysis apparatus that employs an anomaly-cause specifying model using supervised learning to analyze the chronological change of the racing amount of rotational speed, correlating it with the cause of the anomaly, and utilizing operation-state representing values such as hydraulic pressure to accurately determine the cause of shifting malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only the racing amount of rotational speed is monitored to detect anomalies, then anomaly detection capability is provided, but accuracy in specifying the cause of the anomaly deteriorates
Solution Approach 1:
The patent transitions from monitoring a single parameter (racing amount of rotational speed) to analyzing multiple parameters across different dimensions. Specifically, it introduces operation-state representing values (hydraulic pressure, solenoid valve drive currents) and temporal patterns (chronological changes) as additional dimensions. This multi-dimensional analysis enables accurate cause specification by examining how different parameters evolve together during shift control operations, rather than relying solely on rotational speed deviations.
2Measurement precision
If multiple parameters are monitored to improve cause specification accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent creates a unified anomaly analysis system that serves multiple functions: detecting anomalies, specifying causes, and identifying operational states. The anomaly analysis apparatus integrates monitoring of rotational speeds, hydraulic pressures, and solenoid valve currents into a single system that performs comprehensive shift control analysis. This multi-functional approach improves cause specification accuracy without proportionally increasing device complexity, as the system processes multiple parameters through a coordinated analysis framework rather than separate independent systems.
Data Source
AI summary
A vehicle anomaly analysis apparatus for analyzing an anomaly having occurred in a shift control operation executed in an automatic transmission of a vehicle, by using a rotational speed changed in process of the shift control operation. The vehicle anomaly analysis apparatus specifies cause of the anomaly in the shift control operation, by applying an anomaly-cause specifying model that indicates a relationship between a manner of chronological change of a racing amount and the cause of the anomaly in the shift control operation, to the manner of the chronological change of the racing amount upon occurrence of the anomaly in the shift control operation. The racing amount is an amount of increase of the rotational speed in the process of the shift control operation, relative to a reference rotational speed that is based on a gear ratio and an output rotational speed of the automatic transmission.