Vehicle Drive Case Partition for Internal Sensor Wiring
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Solution Overview
Problem
The existing vehicle drive device has a complex structure for connecting rotation sensors and temperature sensors to the control unit, requiring multiple components and external connectors, which increases the risk of water ingress and complicates the sealing process.
Innovation Solution
The vehicle drive device incorporates a case with a partition that allows signal lines connecting the rotation sensor and temperature sensor directly to the control unit through internal communication portions, eliminating the need for external connectors and reducing the number of components, thereby simplifying the connection structure and minimizing water ingress points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external connectors and cables are used to electrically connect sensors to the control unit, then electrical connection is achieved, but the number of components increases and sealing complexity increases
Solution Approach 1:
The patent merges the sensor housing and control unit housing into a single integrated case structure. The rotation sensor and temperature sensor are housed within the same case as the control unit, with signal lines directly connected through internal partitions. This eliminates the need for separate external connectors and cables, reducing both component count and sealing requirements while maintaining electrical connectivity.
Solution Approach 2:
The patent extracts the sensors from separate external housings and integrates them directly into the control unit case. By taking out the sensors and placing them within the same case as the control unit, the design eliminates external connection interfaces and their associated sealing requirements, simplifying the overall structure.
2Reliability
If multiple external connectors and cables are provided, then electrical connection is achieved, but the number of components increases
Solution Approach 1:
The patent combines multiple electrical connections into a single integrated structure. Instead of using separate connectors and cables for the rotation sensor and temperature sensor, all signal lines are routed internally through the case partition, reducing the number of discrete components while ensuring stable electrical connections.
Data Source
AI summary
A rotation sensor is connected to a control unit via a first signal line, and detects rotation of a rotor of a rotary electric machine. A temperature sensor is connected to the control unit via a second signal line, and detects a temperature of a stator of the rotary electric machine. A case includes a first partition portion that partitions a first housing chamber that houses the rotary electric machine, an input member, a transmission gear mechanism, the rotation sensor, and the temperature sensor from a second housing chamber that houses the control unit. The first partition portion includes a first communication portion that communicates the first housing chamber and the second housing chamber. The first signal line and the second signal line are disposed through the first communication portion.