Idling Stop Prohibition Counter for Rapid Diagnostic Analysis
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Solution Overview
Problem
Current vehicle diagnosis systems require users to reproduce driving conditions to determine if idling stop is functioning correctly, increasing user burden and diagnostic time, and cannot accurately differentiate between normal usage and system failures when idling stop is not performed.
Innovation Solution
An idling stop control apparatus with a prohibition counter that tracks the number of times idling stop is prohibited due to specific factors, allowing for quick diagnosis of the reason for non-performance and distinguishing between user property and non-user property factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users are required to reproduce driving conditions to determine if idling stop is functioning correctly, then diagnostic accuracy is improved, but user burden and diagnostic time increase
Solution Approach 1:
The system performs preliminary recording of prohibition factors and their occurrence frequencies during normal vehicle operation. The ECU continuously monitors and stores data about why idling stop is prohibited (e.g., brake pedal operation, ignition switch state, accessory operation) along with occurrence counts. This preliminary data collection eliminates the need for users to reproduce driving conditions during diagnosis, as the diagnostic system can directly analyze pre-recorded prohibition factor data to determine whether idling stop non-performance is due to normal usage or actual system failure.
2Device complexity
If conventional DTC methods are used to store failure information, then system complexity is reduced, but the ability to diagnose normal usage vs. system failure is insufficient
Solution Approach 1:
The diagnostic system segments the analysis of idling stop non-performance by categorizing prohibition factors into different types (e.g., user-operated factors like brake pedal and ignition switch versus system-related factors). The ECU records not just that idling stop is prohibited, but specifically which prohibition factor is active and how frequently it occurs. This segmentation enables the diagnostic system to distinguish between normal user behavior (high frequency of user-operated prohibition factors) and potential system failures (unusual patterns or system-related prohibitions), thereby enhancing diagnostic capability without significantly increasing overall system complexity.
Data Source
AI summary
An idling stop control apparatus of an embodiment includes: an idling stop condition satisfaction determination section that determines whether an idling stop condition, which is a predetermined condition for stopping idling of an engine of a vehicle, is satisfied; an idling stop prohibition determination section that determines that, if the idling stop condition is satisfied, an idling stop prohibition condition is satisfied due to occurrence of one or more specific idling stop prohibition factors due to which idling stop is prohibited from being performed; and a number of times of prohibition counter that counts a number of times of prohibition, which is a number of times that the idling stop prohibition determination section has determined that the idling stop prohibition condition has been satisfied.