Truck Air Pre-filter Assembly for Primary Filter Life Extension
Solution Overview
Problem
Existing air filters in internal combustion engines become clogged quickly due to dust and particles, reducing airflow and engine efficiency, and require costly and time-consuming replacement or cleaning, with prior pre-filter solutions often requiring additional space and structural modifications in the engine compartment.
Innovation Solution
A simple pre-filter assembly with a polyester fiber filter element and expandable retention ring is installed within the OEM air duct, capturing airborne particles before they reach the primary filter, allowing easy installation, cleaning, and replacement without additional space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a pre-filter assembly is added upstream from the primary air filter, then the life of the primary filter is extended and particle capture is improved, but the device complexity and space requirements increase
Solution Approach 1:
The air filtration system is divided into two separate filtering stages: a disposable pre-filter for capturing larger particles and a permanent primary filter for fine filtration. This segmentation allows the pre-filter to be replaced independently without removing the primary filter, extending the primary filter's service life while maintaining simple installation and removal procedures for the pre-filter element alone.
Solution Approach 2:
The pre-filter element is designed as a disposable, inexpensive component that can be quickly replaced when saturated with particles. This disposable approach protects the more expensive primary filter from clogging by larger debris, extending the primary filter's life while avoiding the need for complex cleaning or maintenance systems.
2Object-affected harmful factors
If a pre-filter assembly with structural components is mounted in the engine compartment, then particle capture is improved, but the space requirements and installation time increase
Solution Approach 1:
The pre-filter assembly merges the filtration function with the existing air intake duct structure. The pre-filter element is positioned within the duct's existing cross-sectional area, combining the new filtration capability with the existing airflow path without requiring additional space in the engine compartment.
Solution Approach 2:
The air intake duct serves multiple functions: it guides airflow to the engine and houses the pre-filter element. The pre-filter assembly is designed to fit within the existing duct dimensions, making the duct space multi-functional by accommodating both airflow guidance and particle filtration without expanding the overall vehicle space requirements.
3Ease of operation
If the pre-filter structure requires removal and replacement of OEM components, then the pre-filter can be installed, but the installation time and cost increase
Solution Approach 1:
The pre-filter element is extracted as a separate, self-contained component that can be installed independently without removing or modifying the primary filter or other OEM components. This allows the pre-filter to be added to the air intake system through simple insertion into the existing duct, significantly reducing installation time and avoiding the need for component replacement.
4Adaptability or versatility
If a expandable retention ring is used to accommodate different duct sizes, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The retention ring is designed with expandable properties that allow it to dynamically adjust to different duct diameters. The ring can be compressed for insertion and then expands to engage with the duct wall, providing a secure fit across various sizes without requiring multiple different ring components or complex adjustment mechanisms.
Solution Approach 2:
The retention ring utilizes flexible material properties to achieve adaptability. The ring's flexibility allows it to deform during installation and then maintain engagement with the duct wall through elastic recovery, providing a simple yet versatile retention mechanism that accommodates different duct sizes without adding mechanical 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
The pre-filter assembly extends the life of the primary air filter, enhances engine performance by maintaining airflow, and reduces the frequency and cost of filter replacements by capturing larger particles before they reach the primary filter.
Implementation Method 1
The pre-filter captures allows air to pass through while capturing airborne particles for a preliminary filtering step before the air passes through the primary air filter
Data Source
AI summary
An air pre-filter assembly is provided for installation in the OEM air inlet of an internal combustion engine in a vehicle. The pre-filter assembly includes a polyester fiber filter retained in the inlet duct by a spring-clip or a ring. The pre-filter and ring reside completely within the air duct, and requires no additional structure. The pre-filter assembly is located upstream from the primary filter, and can be replaced or removed for cleaning, as needed.