Integrated Motor Pump With Axial Coils for Compact Transmission Packaging
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Solution Overview
Problem
Existing automotive transmission pumps face challenges in compact design and efficient fluid flow regulation, particularly in integrating electrically driven auxiliary pumps that meet axial constraints and system requirements.
Innovation Solution
A pump design featuring a rotor and stator with electromagnetic flux generation, where the rotor rotates eccentrically within the stator, creating a fluid flow chamber with suction and pressure portions, and inlet and outlet control sections regulate fluid flow using a 3D magnetic flux path, allowing for efficient fluid management in a compact, space-saving configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrically driven auxiliary pumps are integrated into transmission, then system functionality is improved, but axial space constraints are worsened
Solution Approach 1:
The pump is integrated within the transmission housing by nesting the pump components (rotor, stator, fluid flow chamber) within the existing transmission structure. The rotor rotates within the stator which is positioned within the transmission housing, creating a nested arrangement that utilizes available space efficiently without requiring additional axial space.
Solution Approach 2:
The electromagnetic flux path is configured to extend in multiple dimensions (radially and axially) rather than solely axially. The flux path travels radially through the rotor and stator, and axially through the stator, creating a three-dimensional magnetic circuit that reduces the axial footprint of the pump while maintaining pumping capability.
2Productivity
If rotor rotates eccentrically within stator, then fluid flow regulation efficiency is improved, but device complexity is worsened
Solution Approach 1:
The rotor is designed to rotate eccentrically within the stator, creating dynamic variations in the fluid flow chamber volume during rotation. This dynamic volume change automatically regulates fluid flow without requiring additional control valves or mechanisms, improving efficiency while maintaining relatively simple device structure.
Solution Approach 2:
The rotor serves multiple functions: it is driven by electromagnetic flux from the stator, simultaneously acts as a moving component that creates volume changes in the fluid flow chamber, and functions as a rotor in the electromagnetic motor. This multi-functionality reduces the need for separate components, simplifying the overall device while maintaining efficient fluid flow regulation.
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 design achieves efficient fluid flow regulation and compactness by utilizing a 3D magnetic flux path to rotate the rotor within the stator, creating varying suction and pressure areas, effectively managing fluid flow in automotive transmissions.
Implementation Method 1
a stator including electrical coils for generating electromagnetic flux for moving the rotor around the center section
Data Source
AI summary
A pump includes a fluid inlet section, a fluid outlet section, a rotor axially between the fluid inlet section and the fluid outlet section, a center section radially inside of the rotor and a stator including electrical coils for generating electromagnetic flux for moving the rotor around the center section. The rotor and the center section define a fluid flow chamber radially therebetween. The rotor is rotatable about the center section by the electromagnetic flux generated by the electrical coils. An inlet control section is configured for regulating fluid flow from the fluid inlet section into the fluid flow chamber during rotation of the rotor inside of the stator about the center section. An outlet control section is configured for regulating fluid flow from the fluid flow chamber into the fluid outlet section during rotation of the rotor inside of the stator about the center section. The electrical coils are axially offset from the rotor.