Variable-Speed Electric Aspirator for Work Vehicle Air Intake
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Solution Overview
Problem
Current electric aspirator systems in work vehicles operate at a constant speed, leading to energy wastage and excessive aspiration, causing flow restriction and premature activation of restriction sensors, as they are not adapted to varying operating conditions.
Innovation Solution
A system and method that includes a controller to vary the rotational speed of the electric aspirator's motor based on load-based parameters, such as air intake flow, to optimize scavenging efficiency and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric aspirator runs at a constant high speed to ensure effective particulate removal under extreme conditions, then the reliability of particulate scavenging is improved, but the energy consumption increases significantly
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant-speed aspirator to a dynamic variable-speed system. The controller adjusts the motor rotational speed in real-time based on actual operating conditions (air intake flow, load parameters), allowing the aspirator to operate at optimal speed for each condition rather than maintaining a fixed high speed, thus reducing energy consumption while ensuring adequate particulate removal
Solution Approach 2:
The patent implements parameter changes by varying the rotational speed parameter of the aspirator motor according to changing operating conditions. The controller monitors parameters such as air intake flow and engine load, then adjusts the motor speed parameter accordingly - reducing speed when conditions permit and increasing speed when particulate removal effectiveness is compromised
2Productivity
If the electric aspirator operates at a fixed high speed to handle extreme conditions, then the scavenging performance is maintained, but the flow restriction increases causing premature activation of restriction sensors
Solution Approach 1:
The variable-speed control enables the aspirator to dynamically adjust its operation, reducing rotational speed during normal operating conditions to minimize flow restriction and only increasing speed when actually needed to maintain scavenging performance during extreme conditions or when particulate load increases
3Reliability
If the electric aspirator runs continuously at constant speed, then the particulate removal is consistent, but the energy waste increases and the system lacks adaptability to varying operating conditions
Solution Approach 1:
The patent implements feedback control by using the controller to monitor operating conditions (such as air intake flow and engine load parameters) and adjust the aspirator motor speed accordingly. This closed-loop system maintains consistent particulate removal effectiveness by responding to actual conditions rather than operating blindly at fixed speed, thereby improving adaptability without sacrificing reliability
Solution Approach 2:
The system transitions from static constant-speed operation to dynamic variable-speed operation, allowing the aspirator to adapt its performance to matching the actual particulate load and operating conditions, thus achieving both consistency in removal effectiveness and adaptability to varying conditions
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
This approach enhances energy efficiency by adjusting the aspirator's speed according to the vehicle's load, ensuring effective particulate removal while minimizing flow restriction and energy waste.
Implementation Method 1
an electric aspirator configured to apply a vacuum to the pre-cleaner outlet for scavenging the particulates
Implementation Method 2
The electric aspirator may include a motor configured to rotate a fan so as to create a vacuum
Data Source
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AI summary
A system for controlling an air intake system (30) for a work vehicle (10) generally includes a filter assembly (32) having a pre-cleaner (36) configured to separate particulates from air received by the filter assembly (32). The pre-cleaner (36) defines a pre-cleaner outlet (46). The system also includes an electric aspirator (54) in fluid communication with the pre-cleaner outlet (46). The electric aspirator (54) includes a motor (70) configured to rotate a fan (72) so as to create a vacuum for scavenging the particulates separated from the air within the pre-cleaner (36). In addition, the system includes a controller (102) communicatively coupled to the electric aspirator (54). The controller (102) is configured to vary a rotational speed of the motor (70) based on changes in a load-based parameter of the work vehicle (10), in particular on the air intake flow into an engine (22) of the work vehicle (10).