Electric Oil Pump Temperature Sensing via Integrated Heat Conduction
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Solution Overview
Problem
The existing lubrication and cooling systems in vehicles, powered by electronic oil pumps, have complex system structures due to mechanical and electrical connections required for temperature sensors, which complicates the system design and maintenance.
Innovation Solution
An electronic oil pump design that integrates a temperature sensing unit within the pump, eliminating the need for external mechanical and electrical connections, by arranging the sensing unit to detect the temperature of nearby metal layers or plate layers, thus simplifying the system structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is arranged on the inlet pipeline of the electronic oil pump with mechanical and electrical connections to the control unit, then the oil temperature can be detected, but the system structure becomes complex
Solution Approach 1:
The temperature sensing unit is integrated directly into the electric control board assembly, merging the temperature detection function with the control unit. The sensing unit includes a temperature sensing element arranged on the heat conducting member, which is in thermal contact with the stator assembly, allowing temperature detection without external mechanical and electrical connections.
Solution Approach 2:
A heat conducting member is introduced as an intermediary between the stator assembly and the temperature sensing unit. The heat conducting member transfers heat from the stator assembly to the temperature sensing element, enabling indirect temperature measurement while simplifying the system structure by eliminating the need for separate sensor mounting and wiring.
2Measurement precision
If a temperature sensor is externally connected to the electronic oil pump, then temperature detection is possible, but the system becomes less compact
Solution Approach 1:
The temperature sensing unit is merged with the electric control board assembly, eliminating the need for separate external sensor mounting. The sensing element is integrated onto the control board, reducing the overall system volume and improving compactness while maintaining temperature detection capability.
Solution Approach 2:
The temperature sensing unit is nested within the electric control board assembly structure. The heat conducting member is positioned to thermally contact the stator assembly while the sensing element is mounted on the control board, creating a nested arrangement that saves space and improves system compactness.
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 integration simplifies the system structure, reduces mechanical and circuit connections, and makes the system more compact, while allowing for accurate temperature detection and improved heat transfer efficiency.
Implementation Method 1
the heat conducting member includes a first part and a second part, the first part is located in the second cavity, the second part is located in the third cavity... the temperature sensing unit can detect the temperature of the nearest metal layer
Data Source
AI summary
An electronic oil pump includes a first rotor assembly, a stator assembly, an electric control board assembly, an isolation member and thermal conductive members; the first rotor assembly is located in a first chamber of the electronic oil pump, the thermal conductive members each comprise a first portion and a second portion, the first portions being located in a second chamber of the electronic oil pump, the second portions being located in a third chamber of the electronic oil pump; the electric control board assembly includes a base plate and a temperature-sensing unit, the base plate including first holes, an upper plate layer, a lower plate layer and at least one metal layer, a part of the second portions being located in the first holes; the temperature-sensing unit is located at one side of the second portion, there is a preset distance between the temperature-sensing unit and the second portion.