Fuel Injection Controller Exchange Detection
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Solution Overview
Problem
Existing fuel injection control systems rely on pre-stored characteristic data, which may become incorrect if the fuel injector or ECU is exchanged, leading to potential control based on improper data.
Innovation Solution
A fuel injection controller with an electronic control unit, injector-side memory, and control-side memory for storing identification information, allowing for collation to detect exchanges and ensure accurate characteristic data is used for control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If characteristic data is pre-stored in memory for fuel injector control, then fuel injection control can be performed based on stored data, but the system cannot detect when the injector or ECU is exchanged, leading to potential control based on incorrect data
Solution Approach 1:
The patent applies preliminary action by storing identification information in the ECU memory before the injector or ECU is exchanged. This pre-stored identification data enables the system to detect exchanges by comparing it with new identification information, ensuring that characteristic data corresponds to the actual injector being used.
Solution Approach 2:
The patent implements feedback by continuously comparing identification information stored in the ECU with identification information from the currently installed injector. This feedback mechanism detects exchanges and triggers appropriate responses, such as displaying notifications or clearing stored characteristic data, preventing control based on mismatched data.
2Reliability
If identification information is stored and collated to detect exchanges, then reliability of fuel injection control is improved, but device complexity increases due to additional memory and collation functions
Solution Approach 1:
The patent merges the identification information storage function into the existing ECU memory structure. The control unit integrates both the identification information storage area and the characteristic data storage area within the same memory system, reducing the need for separate dedicated memory components and minimizing additional hardware complexity.
Solution Approach 2:
The ECU memory is designed to serve multiple functions: storing identification information, storing characteristic data, and performing collation operations. This multi-functionality eliminates the need for separate dedicated components for each function, thereby reducing overall device complexity while maintaining reliability improvements.
Data Source
AI summary
A fuel injection controller includes an ECU controlling an operation of a fuel injector based on a characteristic data of the fuel injector, an EEPROM provided to the injector, and an EEPROM provided to the ECU. Identification information by which the fuel injector is individually identified is stored in both of the EEPROMs. It is determined whether the identification information stored in the injector-side EEPROM is identical to the identification information stored in the ECU-side EEPROM. Based on this determination result, it can be determined whether the injector and/or the ECU are exchanged to new one.