Injection Pump Filter for Actuator Particle Protection
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Solution Overview
Problem
Existing injection pumps for common rail gasoline engines are susceptible to particle contamination, which can disrupt the operation of the electromagnetic actuator and lead to its failure.
Innovation Solution
The proposed injection pump incorporates a fixed filter positioned around the pushing rod, located between the valve and the electromagnetic actuator in the inlet chamber, to prevent particles from reaching the actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed filter is added around the pushing rod to protect the electromagnetic actuator from particles, then the reliability of the actuator is improved, but the device complexity increases
Solution Approach 1:
The filter is nested within the existing pump structure by positioning it around the pushing rod in the inlet chamber. The filter integrates with the electromagnetic actuator assembly without requiring separate housing or mounting structures, thus protecting the actuator while minimizing additional complexity.
Solution Approach 2:
The filter acts as an intermediary element between the particle-contaminated liquid fluid and the electromagnetic actuator. It intercepts particles in the flow path before they can reach the actuator, providing protection while maintaining the functional integrity of both the fluid delivery system and the actuator.
2Object-affected harmful factors
If the filter is positioned around the pushing rod in the inlet chamber, then particle protection is achieved, but the ease of manufacture decreases
Solution Approach 1:
The filter is designed as a separate, modular component that can be independently manufactured and then assembled into the pump. This segmentation allows the filter to be produced using standard filtering component manufacturing processes, and simplifies assembly by requiring only its installation around the pushing rod in the inlet chamber.
3Device complexity
If the filter is trapped between the annular shoulder and the fixed valve armature, then the filter position is secured without additional locking parts, but the manufacturing precision requirements increase
Solution Approach 1:
The filter retention function is merged with the existing structural elements of the pump - specifically the annular shoulder of the inlet chamber and the fixed valve armature. These existing components serve dual purposes: maintaining pump operation and securing the filter in position, thereby eliminating the need for separate locking mechanisms while requiring precise manufacturing of the interface surfaces.
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
The filter effectively protects the electromagnetic actuator from debris, ensuring reliable operation of the pump by preventing particle contamination.
Implementation Method 1
a valve (3) located between the inlet chamber (2) and the compression chamber (8), provided with a resilient cup (31)
Implementation Method 2
actuated by an electromagnetic actuator through a pushing rod (4)
Implementation Method 3
said filter being configured to prevent particles travelling in the inlet chamber to reach the electromagnetic actuator
Data Source
AI summary
An injection pump having a pump body provided with an inlet conduit supplying an inlet chamber, and a compression chamber downstream from the inlet chamber under which a piston reciprocates to distribute liquid fluid from the compression chamber to an outlet pipe in communication with a common rail circuitry. The injection pump has a valve provided with a resilient cup, located between the inlet chamber and the compression chamber and actuated by an electromagnetic actuator through a pushing rod wherein operation of the valve allows the piston to suck liquid fluid from the inlet chamber into the compression chamber and feed the common rail circuitry or to push back liquid fluid in said inlet chamber and said inlet conduit, in which the pump comprises a filter provided around the pushing rod and located between the valve and the electromagnetic actuator in the inlet chamber.