Engine Control Unit Failsafe Logic for Start Angle Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing engine start control systems are prone to miscalculations in determining the start angle for fuel injection and ignition, leading to unintended engine operability and suboptimal control due to inaccurate data usage.
Innovation Solution
A failsafe logic method is implemented in the engine control unit to verify and correct the start angle calculation by comparing the submodule's start angle with a driver-calculated angle, using error permission values to ensure accurate fuel injection and ignition timing, thereby preventing excessive distortion and optimizing engine control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the engine control unit uses the start angle calculated by the submodule, then the fuel injection and ignition control can be performed, but miscalculation in the start angle may cause unintended engine operability and suboptimal control
Solution Approach 1:
The engine control unit calculates the start angle based on the tooth period and compares it with the start angle provided by the submodule. This feedback mechanism allows the system to detect and correct miscalculation in the start angle, ensuring reliable fuel injection and ignition control while maintaining productivity.
2Reliability
If the engine control unit implements failsafe logic to verify start angle calculation, then miscalculation can be prevented, but the control system complexity increases
Solution Approach 1:
The engine control unit performs self-verification of the start angle calculation by comparing the submodule's output with independently calculated values based on tooth period. This self-service approach enhances reliability without requiring external monitoring systems, thereby limiting the increase in overall system complexity.
3Ease of operation
If the engine control unit uses miscalculated start angle information, then the control process can continue, but unintended engine operability occurs due to excessive distortion of start time
Solution Approach 1:
The engine control unit prepares reference values for start angle calculation based on the tooth period before the actual fuel injection and ignition control. This beforehand cushioning allows the system to detect and prevent miscalculation effects, ensuring that only accurate start angle information is used while maintaining control process continuity.
Data Source
AI summary
A method for engine start control based on a failsafe logic includes performing, by an engine control unit, calculated information failsafe control for performing miscalculation verification for a submodule start angle of a submodule using a start angle for fuel injection and ignition of an engine as a driver start angle of an injector driver.