Solenoid Valve Fault Simulation via Current Control
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Solution Overview
Problem
Current methods for simulating malfunctioning solenoid valves in internal combustion engines are costly, complex, and logistically challenging, with modified valves prone to wear and limited control software capabilities, particularly in detecting timing defects.
Innovation Solution
Influencing the activation and deactivation times of conventional solenoid valves by varying current strength and applying additional magnetic forces using permanent magnets or coils to simulate advanced or retarded activation and deactivation, thereby reducing costs, complexity, and development time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modified malfunctioning solenoid valves are manufactured as extra components, then fault detection capability is improved, but production costs and complexity increase
Solution Approach 1:
Instead of manufacturing physically modified solenoid valves, the patent creates virtual copies of malfunctioning behavior through simulation software. The diagnostic system uses a database containing characteristic data of malfunctioning solenoid valves to compare against measured values from actual valves, thereby detecting faults without requiring physical modifications to the hardware components.
Solution Approach 2:
The patent replaces the mechanical approach of physically modifying solenoid valves with an information-based approach using simulation software and database comparisons. The system substitutes physical malfunctioning components with virtual models that simulate various failure modes, eliminating the need for complex manufacturing of modified hardware while maintaining fault detection capability.
2Reliability
If modified solenoid valves are manufactured as extra components, then fault detection capability is improved, but development time increases
Solution Approach 1:
The patent creates virtual representations of malfunctioning solenoid valves through simulation software and databases, eliminating the time-consuming process of manufacturing and testing physical modified components. The characteristic data of various failure modes are pre-programmed into the system, allowing rapid fault detection without iterative physical prototyping.
Solution Approach 2:
The patent performs preliminary actions by pre-programming the simulation software with characteristic data of various malfunctioning solenoid valve conditions. This preparation is done once, and then the system can rapidly detect faults in production without requiring repeated manufacturing and testing cycles, significantly reducing development time.
3Reliability
If modified solenoid valves are used, then fault detection capability is improved, but logistics complexity increases
Solution Approach 1:
The patent replaces physical modified solenoid valves with virtual simulation models and database entries. The characteristic data of malfunctioning valves are stored digitally, eliminating the need for physical distribution, storage, and management of modified components across different locations, thereby simplifying logistics.
4Reliability
If modified solenoid valves are manufactured, then fault detection capability is improved, but manufacturing costs increase
Solution Approach 1:
The patent uses virtual copies and simulation software instead of physically manufacturing modified solenoid valves. This approach eliminates material costs, machining costs, and assembly costs associated with creating modified hardware components, while still providing comprehensive fault detection capability through software-based simulation and comparison.
Solution Approach 2:
The patent substitutes the mechanical manufacturing process with an information processing approach. Instead of physically altering solenoid valves to create malfunctioning versions for testing, the system uses simulation software to model various failure modes and compares measured values against these virtual models, eliminating manufacturing costs entirely.
5Ease of operation
If conventional current control is used, then solenoid valve operation is simple, but timing precision is insufficient for detecting switching time defects
Solution Approach 1:
The patent implements feedback by continuously measuring the actual switching times of the solenoid valve and comparing them against the activation and deactivation times stored in the database. The system uses this comparison to detect deviations and diagnose timing defects, maintaining simple operation while achieving high measurement precision through systematic data collection and analysis.
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
This approach allows for efficient simulation of solenoid valve timing variations, reducing production costs and complexity, and enhancing fault detection capabilities without the need for modified valves, thus improving diagnostic system effectiveness.
Implementation Method 1
a primary coil that is connected to an electrical connection... the magnetic force generated by the current flowing through the primary coil
Implementation Method 2
an additional coil (22) that can be supplied with current... generates a secondary magnetic field whose strength is variable
Implementation Method 3
a permanent magnet (21) arranged in the vicinity of the magnetic armature (6)
Data Source
AI summary
A method for simulating malfunctioning solenoid valves is disclosed. A current flows through a solenoid valve in order to achieve opening and closing. The closing is forced after the current supplied to the solenoid valve is activated at an activation time, and the opening is forced after the current is deactivated. The current is applied with a charging current strength before activation for a charging phase, and after activation, the current is increased to peak current strength and subsequently reduced to a holding current strength. The current strength is reduced to a deactivation current strength, after which the current strength increases again. A variation of the value or duration of the current strength or an application of an additional magnetic force is used to simulate a premature activation, a delayed activation, a premature deactivation, or a delayed deactivation.