Filter Housing Extra Outlet for Truck Air Compressor
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Solution Overview
Problem
Existing air filter arrangements for truck combustion engines with extra air outlets connected to air compressors complicate the air flow through blow-moulded duct systems, leading to increased pressure drop and fuel consumption, as well as disrupting mass flow measurements.
Innovation Solution
A filter housing design with an extra air outlet and an air aperture between the filter unit and engine air outlet, allowing filtered air to be extracted before entering the engine's ducts, reducing disturbances to the mass flow and enabling a standardized connection to the compressor, thus minimizing the need for multiple compressor hoses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the extra air outlet is connected to the air compressor via blow-moulded air duct system with pipe stubs on ducts, then the air can be supplied to the compressor, but the air duct configuration becomes complicated and the pressure drop increases
Solution Approach 1:
The invention extracts the extra air outlet function from the engine air outlet duct system and relocates it to the filter housing. This allows the compressor to draw air directly from the filter housing without requiring modifications to the engine air duct system, thereby simplifying the overall duct configuration and reducing pressure drop while maintaining the ability to supply air to the compressor.
2Ease of operation
If the extra air outlet is connected via pipe stubs on air ducts, then air can be supplied to the compressor, but the mass flow measurement to the engine is disrupted
Solution Approach 1:
The invention extracts the air withdrawal point from the engine air outlet duct (where mass flow measurement occurs) and relocates it to the filter housing upstream of the duct system. This ensures that the mass flow meter on the engine air duct measures only the air intended for the engine, without interference from air being diverted to the compressor, thereby maintaining measurement precision.
3Productivity
If the extra air outlet is situated on the filter housing, then the main air flow to the engine proceeds undisturbed, but the connection to the compressor requires a separate hose run
Solution Approach 1:
The invention segments the air supply system into two independent pathways: one for the engine (through the air duct system with mass flow meter) and one for the compressor (directly from the filter housing). This segmentation allows the main air flow to the engine to proceed undisturbed while the compressor receives air through a dedicated connection, simplifying the overall system architecture despite requiring a separate hose run.
Data Source
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AI summary
The invention relates to a filter housing (10) for a filter unit (50) with a substantially semicylindrical air filter (52), comprising an air inlet (20) and an engine air outlet (40). According to the invention the filter housing has an extra air outlet (36) and an air aperture (64) to the extra air outlet (36), situated between the filter unit (50) and the engine air outlet (40), which aperture (64) extends along a periphery of the engine air outlet. The invention relates also to a filter unit for such a filter housing.