Work Vehicle Air Intake System with Blower Vacuum Cleaning
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Solution Overview
Problem
Conventional air intake systems for work vehicles fail to effectively remove both large and small particulates from the filter assembly, leading to premature plugging of the air filter, as the vacuum generated by the exhaust flow is insufficient to clear trapped particulates.
Innovation Solution
An air intake system with a filter assembly including a pre-cleaner and an air filter, coupled with a blower and an air valve that creates a vacuum to remove particulates during normal operation and reverses airflow to dislodge trapped particulates during a cleaning mode after engine shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vortex pre-cleaner is used to separate large particulates from intake air, then large particulates are removed from the air stream, but the vacuum generated by exhaust flow is insufficient to remove trapped particulates from the filter assembly, causing the air filter to plug prematurely
Solution Approach 1:
A blower is introduced as an intermediary device to generate vacuum pressure specifically for removing trapped particulates from the filter assembly. The blower connects to the pre-cleaner outlet and creates sufficient suction to pull particulates through the filter media, which the exhaust flow alone cannot achieve.
Solution Approach 2:
The system uses pneumatic pressure differentials created by the blower to remove particulates. The blower generates a vacuum pressure that exceeds the exhaust flow vacuum, enabling effective removal of trapped particulates through the filter assembly without compromising the filtering function.
2Productivity
If a fan module is used to suck large particulates from the pre-cleaner, then large particulates are removed effectively, but smaller particulates flow downstream and become trapped within the air filter, eventually plugging it
Solution Approach 1:
The blower operates continuously or periodically to maintain a vacuum that prevents particulate accumulation in the filter assembly. This continuous action ensures both large and small particulates are removed before they can plug the air filter, extending filter lifespan while maintaining high productivity.
Solution Approach 2:
The system uses its own blower device to clean its filter assembly, creating a self-maintaining system. The blower generates the vacuum needed to remove particulates that would otherwise require external cleaning intervention, making the system self-sufficient in maintaining its filtering capability.
3Device complexity
If exhaust flow vacuum is used to remove particulates, then the system requires no additional power source, but the vacuum is insufficient to meet performance requirements and particulates remain trapped
Solution Approach 1:
The particulate removal function is segmented into two distinct mechanisms: exhaust flow vacuum for initial particulate movement and blower-generated vacuum for thorough removal of trapped particulates. This segmentation allows each mechanism to perform its specific function effectively without relying on the other.
Solution Approach 2:
The blower serves multiple functions: it generates vacuum pressure for removing trapped particulates, maintains airflow through the filter assembly, and can operate independently of the exhaust flow system. This multi-functionality allows the system to meet performance requirements while managing 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
Effectively aspirates large particulates and removes trapped particulates from the filter assembly, extending the filter's operational life by using a blower to create a vacuum that expels particulates during normal operation and reverses airflow to clean the filter after engine shutdown.
Implementation Method 1
The blower may be configured to create a vacuum within the conduit such that particulates are removed from the filter assembly through the outlet port
Implementation Method 2
conventional filter assemblies for work vehicles typically include a vortex or cyclone pre-cleaner configured to separate large particulates from the intake air
Data Source
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AI summary
An air intake system (30, 130) for a work vehicle (10) may include a filter assembly (32, 132) having a pre-cleaner (36, 136) and an air filter (38, 138). The filter assembly (32, 132) may define at least one outlet port (46, 146). The air intake system (30, 130) may also include an air valve (72, 172) movable between an opened position and a closed position and a blower (64, 164) coupled to the outlet port (46, 146) via a conduit (58, 158). The blower (64, 164) may be configured to create a vacuum within the conduit (58 , 158) such that particulates are removed from the filter assembly (32, 132) through the outlet port (46, 146). When the air valve (72, 172) is in the opened position, an airflow may be directed through the filter assembly (32, 132) in an intake direction from the pre-cleaner (36, 136) through the air filter (38, 138) and, when the air valve (72, 172) is in the closed position, the airflow may be directed through the air filter (38, 138) in a reverse direction.