Injector Driver Idle Mode Channel Defect Detection
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Solution Overview
Problem
Existing injector drivers fail to effectively identify defects in driving channels during the idle mode, leading to substantial delays in recognizing defective states and locating defect locations, as they only detect short circuits between power supply and reference voltage terminals.
Innovation Solution
An injector driver with driving switches, a monitoring unit, a register, and a controller that actively identifies short defects in each driving channel during idle mode by comparing node signals and storing defect detection results, allowing for precise determination of defect locations without relying on the main micro control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the existing injector driver only detects short circuits between power supply and reference voltage terminals, then the device complexity is reduced, but the measurement precision of defect detection deteriorates
Solution Approach 1:
The defect detection function is segmented into two levels: basic short circuit detection (power supply to reference voltage) and detailed channel-level defect detection. The monitoring unit divides the driving channels into multiple detectable segments, allowing precise identification of which specific channel has a defect without requiring complex detection mechanisms for the entire system.
Solution Approach 2:
A monitoring unit is introduced as an intermediary component between the driving switches and the main micro control unit. This monitoring unit actively monitors the driving channels during idle mode and generates defect information, mediating the detection process to achieve precise defect identification without burdening the main control unit with complex detection logic.
2Measurement precision
If the main micro control unit programs a specific sequence to identify defect locations, then the measurement precision of defect location is improved, but the loss of time increases substantially
Solution Approach 1:
The monitoring unit performs preliminary defect detection and identification actions during the idle mode before the main micro control unit needs to process defect information. By proactively monitoring driving channels and identifying defects in advance, the system eliminates the need for time-consuming sequential programming and defect location identification by the main control unit.
Solution Approach 2:
The monitoring unit provides self-service by autonomously detecting defects, determining defect locations, and generating defect information without requiring the main micro control unit to execute complex identification sequences. This self-service capability significantly reduces the time loss associated with defect detection while maintaining precise defect location identification.
3Reliability
If the injector driver actively inspects each driving channel during idle mode, then the reliability of the injector system is improved, but the use of energy during idle mode increases
Solution Approach 1:
The active inspection of driving channels is performed periodically during idle mode rather than continuously. The monitoring unit utilizes the idle periods between fuel injection operations to conduct defect detection, ensuring that reliability is maintained through regular checks while minimizing energy consumption by not operating during active fuel injection phases.
Data Source
AI summary
An injector driver and a method of controlling the injector driver are provided. A defect of a driving channel is detected by enabling an identification of safety inspection for each channel in a driving semiconductor during an idle mode. The injector driver includes a plurality of driving switches that operate an injector and a driving semiconductor that drives of the driving switches. In addition, the driving semiconductor determines a short defect of the injector during an idle mode and detects and stores the defective short in a channel unit.