Engine Air Intake Ejector for Self-Cleaning Filter Housings
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Solution Overview
Problem
Power machines operating in dusty environments face challenges with contaminants accumulating in air intake systems, leading to reduced engine performance and increased maintenance costs due to the need for regular manual cleaning of filter housings.
Innovation Solution
An air intake system with an ejector that uses a Venturi principle to induce a suction flow, removing contaminants from the filter housing using a small diversion of pressurized air from the engine's boost system, enhancing the aspiration process and reducing manual cleaning needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning of filter housings is performed regularly, then contaminants are removed from the air intake system, but maintenance complexity and costs increase
Solution Approach 1:
The system enables self-cleaning of the filter housing by utilizing the engine's own boosted air to generate suction through the ejector. The housing automatically removes its own contaminants without external intervention, transforming the maintenance function from manual cleaning to autonomous self-service operation
Solution Approach 2:
The ejector utilizes pneumatic principles by using pressurized boosted air as a motive flow to create suction through the Venturi effect. This pneumatic system automatically transports contaminants from the filter housing without mechanical moving parts, replacing manual cleaning operations with automated pneumatic extraction
2Loss of time
If an ejector system is added to automate contaminant removal, then maintenance frequency is reduced, but device complexity increases
Solution Approach 1:
The ejector system serves multiple functions: it removes contaminants from the filter housing, transports debris outward, and utilizes already-available boosted air from the engine. By making the ejector a multi-functional component that leverages existing system resources, the added complexity is minimized while achieving automated maintenance
Solution Approach 2:
The ejector acts as an intermediary device that converts pressurized boosted air into suction flow to remove contaminants. This intermediary component bridges the gap between the engine's air system and the filter housing cleaning function, enabling automated operation without direct mechanical connection or complex control mechanisms
3Productivity
If boosted air is diverted to power the ejector, then contaminant removal is enhanced, but airflow to the engine is reduced
Solution Approach 1:
The system uses a small diversion of boosted air through the ejector, applying partial action rather than full utilization. This small portion of air is sufficient to generate the necessary suction for contaminant removal while leaving the majority of boosted air available for engine operation, balancing cleaning effectiveness with engine performance
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 system effectively removes contaminants with minimal airflow reduction, maintaining engine performance and reducing maintenance complexity and costs by automating the aspiration process.
Implementation Method 1
An air intake system with an ejector that uses a Venturi principle to induce a suction flow, removing contaminants from the filter housing using a small diversion of pressurized air from the engine's boost system
Data Source
AI summary
A power machine can include a frame, an engine supported by the frame, and an air intake system that directs intake air to the engine. The air intake system can include a filter assembly that includes a filter housing and a filter element positioned in the filter housing to filter contaminants from the intake air. A pressure source can be arranged to pressurize filtered air from the filter assembly and provide the pressurized filtered air to an intake of the engine. The air intake system can further include an ejector arranged to receive a portion of the pressurized filtered air and induce a suction flow at the filter housing to eject contaminants from the air intake system.