Fuel Injector Control Valve Actuator Sensor Integration
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Solution Overview
Problem
Existing fuel injectors face challenges in precisely recording operating phases due to wear and component scatter, leading to inconsistent fuel quantity injection and suboptimal engine performance.
Innovation Solution
The control valve arrangement is enhanced by using a guide rod that transmits fluid pressure to a deformable part within the electromagnet's magnetic field, allowing movement-dependent electrical or magnetic parameters to be evaluated for precise detection of operating phases, thus enabling the actuator to serve as both an actuator and sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control valve arrangement uses a traditional separate sensor system to detect operating phases, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the actuator (electromagnet arrangement) and sensor functions into a single integrated system. The electromagnet arrangement serves dual purposes: actuating the control valve arrangement and detecting operating phases through its magnetic field interactions. This merging eliminates the need for separate sensor systems while maintaining detection precision.
Solution Approach 2:
The electromagnet arrangement is designed to perform multiple functions simultaneously. It acts as both an actuator to control the valve and a sensor to detect closing times and operating phases through its magnetic field characteristics, particularly through the interaction with the guide rod and armature system.
2Reliability
If wear and component scatter are present in traditional fuel injectors, then reliability deteriorates, but manufacturing precision cannot be improved without increasing cost
Solution Approach 1:
The system uses the electromagnet arrangement to continuously monitor and detect actual closing times and operating phases. This feedback mechanism allows for real-time detection of deviations caused by wear or component scatter, enabling compensation strategies to maintain consistent fuel injection timing despite manufacturing variations or component degradation.
Solution Approach 2:
The electromagnet arrangement serves itself by using its own magnetic field interactions to detect operating phases. The guide rod and armature system provide self-diagnostic capability, allowing the actuator to monitor its own performance and detect closing times without requiring external sensor systems that would add complexity.
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 solution allows for precise monitoring of closing times and operating phases of the fuel injector, improving engine control by reducing the structural effort required and minimizing the impact of wear and component scatter.
Implementation Method 1
an electromagnet arrangement which forms the actuator
Implementation Method 2
the fluid pressure present inside the sleeve-shaped closing body can be transferred to the deformable or movable part via the guide rod
Implementation Method 3
guides or bundles the magnetic field of the actuator, with movement- or deformation-dependent electrical or magnetic parameters of the actuator being used
Data Source
Figure 1
Figure 2~2B
Figure 3~4
AI summary
The control valve assembly, which is preferably associated with a control chamber of a fuel injector, comprises an electromagnetic actuator, which is arranged such that the electromagnetic parameters thereof are varied by the pressure in the control chamber. It is thus possible to detect predefined operating times, in particular the closing times of the injection nozzles, by detecting the electrical voltages or currents at the actuator.