Engine Wiring Body Using Another Dimension to Reduce Head Cover Size
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Solution Overview
Problem
Conventional circuit wiring bodies integrated into engine head covers increase the size of the head cover and subsequently the engine, necessitating a solution to reduce engine size while maintaining electrical connectivity.
Innovation Solution
A circuit wiring body with a wiring main body wired along the outer surface of the cylinder head, incorporating a conductive member and insulating member, and an electrical connection unit with terminals to connect electrical components, which is fitted into the cylinder head and grounded using a fixing member, reducing the need for additional components and simplifying attachment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive member is integrated in a head cover, then electrical connection between cylinder head and head cover is achieved, but the size of the head cover increases
Solution Approach 1:
The conductive member is positioned along the outer wall surface of the cylinder head rather than being integrated into the head cover, utilizing the spatial dimension between the cylinder head and head cover to achieve electrical connection without increasing head cover volume
Solution Approach 2:
An insulating member serving as a holder is introduced as an intermediary component to position and support the conductive member, enabling electrical connection while maintaining compact head cover dimensions
2Reliability
If conductive member is buried in head cover, then electrical connectivity is established, but engine size increases
Solution Approach 1:
The wiring main body is arranged along the outer wall surface of the cylinder head, utilizing the vertical and lateral spaces between components rather than embedding within the head cover, thereby avoiding engine size increase
Solution Approach 2:
The electrical connection system is segmented into distinct functional components: conductive member for electrical connection, insulating member for support and insulation, and terminal for external connection, allowing optimized spatial arrangement
3Reliability
If wiring is exposed externally, then electrical connection is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The insulating member integrates multiple functions: holding the conductive member, providing electrical insulation, and serving as a mounting structure for terminals, thereby reducing overall device complexity
Solution Approach 2:
The insulating member acts as a multi-functional component that combines support, insulation, and structural functions, eliminating the need for separate external wiring structures
Data Source
AI summary
A circuit wiring body includes a wiring main body and an electrical connection unit. The wiring main body includes a conductive member that is wired between a cylinder head and a head cover in an engine, and an insulating member that stores therein the conductive member. The electrical connection unit includes a terminal that electrically connects a counterpart connector of an electrical component (electromagnetic driving valve) at least interposed between the cylinder head and the head cover to the conductive member.