Injector Driver Semiconductor Deceleration Control
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Solution Overview
Problem
In vehicle engine systems, brake signals are not reliably transmitted to the engine controller due to physical impacts or MCU failures, leading to inaccurate deceleration operations, which compromises engine control and safety.
Innovation Solution
An injector driver with a driving semiconductor that cross-checks deceleration conditions with the main MCU and actively controls the injector's deceleration operation by transmitting interrupt signals and adjusting driving signals when the MCU fails or is unresponsive, ensuring stable deceleration and safety functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main MCU controls the deceleration operation based on brake signals, then the engine control is centralized and efficient, but the system reliability deteriorates when the MCU fails or is affected by physical impacts
Solution Approach 1:
The control function is segmented between the main MCU and the driving semiconductor. The driving semiconductor is given independent authority to detect brake signals and control injector deceleration operations, separating the safety-critical deceleration control from the centralized MCU control. This segmentation ensures that even if the MCU fails, the deceleration function remains operational through the driving semiconductor's independent control capability.
2Reliability
If the driving semiconductor independently controls deceleration operations, then the system reliability improves during MCU failures, but the control precision deteriorates without cross-checking
Solution Approach 1:
The driving semiconductor implements a feedback mechanism by detecting whether the MCU has responded to brake signals within a predetermined time period. When the MCU fails to respond, the driving semiconductor receives feedback indicating MCU unresponsiveness and automatically activates independent control mode. This feedback loop ensures that the driving semiconductor only takes over control when necessary, maintaining precision through conditional independent operation rather than constant autonomous control.
3Ease of operation
If the brake signal transmission is simplified, then the system ease of operation improves, but the safety function deteriorates when physical impacts or failures occur
Solution Approach 1:
The driving semiconductor is pre-configured with the authority and capability to independently control deceleration operations. Instead of requiring complex verification protocols during normal operation, the system is designed in advance so that the driving semiconductor can immediately activate independent control when it detects that the MCU has not responded to brake signals within the predetermined time period. This preliminary preparation ensures rapid safety response without compromising normal operational simplicity.
Data Source
AI summary
An injector driver and an operating method thereof are provided in which a driving semiconductor directly controls a brake signal when a brake error occurs in driving an injector, to thus secure a safety function. The injector driver a driving semiconductor configured to transmit an interrupt signal for acknowledging whether a brake signal has been received to a micro-control unit (MCU) when a brake signal is applied. In addition, the driving semiconductor receives a brake signal recognition acknowledgement response signal from the MCU and detects whether the MCU has an error based on the brake signal recognition acknowledgement response signal reception result. Further, the driving semiconductor operates an injector driving signal when the response signal is not received from the MCU for a predetermined period of time.