Valve Seating Detection via Solenoid Voltage Timing
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Solution Overview
Problem
Existing methods for detecting valve seating in electrically actuated valves are computationally intensive and lack precision in controlling the valve closing time due to unpredictable travel speed and valve closing time.
Innovation Solution
A valve seating detection mechanism that includes a voltage probe coupled with solenoid circuitry, delay circuitry, and a comparator to sense and compare voltage changes, determining the valve seating time based on the difference between voltage at two distinct times, allowing for precise timing of valve closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sophisticated electronic control modules and computational techniques are used to detect valve seating, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and monitors specific voltage characteristics from the solenoid circuitry that are directly indicative of valve seating. By focusing on particular voltage thresholds and timing parameters rather than performing comprehensive computational analysis, the system achieves accurate seating detection with reduced computational complexity.
Solution Approach 2:
The patent uses voltage signals as an intermediary parameter to indirectly detect valve seating. Instead of directly measuring valve position or using complex sensor systems, the invention monitors voltage changes in the solenoid circuitry that correlate with seating events, simplifying the detection mechanism while maintaining precision.
2Measurement precision
If computational techniques are used to analyze induced current properties for seat detection, then measurement precision is improved, but productivity decreases due to intensive computation
Solution Approach 1:
The patent establishes predetermined voltage thresholds and timing criteria before valve operation begins. By pre-configuring the detection parameters, the system eliminates the need for real-time computational analysis during valve cycling, enabling rapid seating detection that maintains precision without compromising operational speed.
Solution Approach 2:
The patent replaces complex computational analysis with simpler electronic voltage threshold comparison. By substituting mathematical computation with direct electrical signal evaluation, the system achieves both high detection accuracy and fast response times suitable for high-speed valve operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and efficient detection of valve seating without excessive computational demands, improving control over valve closing time and facilitating diagnostic and control purposes in engine systems.
Implementation Method 1
a voltage probe configured to couple with solenoid circuitry in an electrical actuator for a valve to sense voltage in the solenoid circuitry
Implementation Method 2
solenoid circuitry having a solenoid positioned to inductively couple with the armature. Energizing of the solenoid causes the armature to move toward the solenoid
Data Source
AI summary
A system for detecting valve seating in a valve system such as a fuel admission valve system includes seat detection circuitry coupled with a low-side driver circuit in solenoid actuator circuitry for the valve system. The seat detection circuitry includes a voltage probe for sensing voltage in the solenoid actuator circuitry, delay circuitry, and a comparator coupled with the delay circuitry and the voltage probe and having an output dependent upon change in the sensed voltage over time. A timing of voltage changes is observed to enable valve seating detection.