Wheel Housing Access for Engine-In-Place Spark Plug Replacement
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Solution Overview
Problem
The existing design of cars requires the removal of the entire engine for spark plug replacement due to limited space, making the process lengthy, complex, and expensive.
Innovation Solution
The car design includes accessible openings in the back walls of the housing compartments for the spark plugs, allowing direct access and replacement without removing the engine, by removing the drive wheels and suspensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the engine is kept fixed in position, then the structural stability and compactness of the car is improved, but the accessibility of spark plugs for replacement deteriorates
Solution Approach 1:
The housing compartment back wall is segmented by creating openings that allow access to the spark plugs without requiring removal of the entire engine. This divides the access path into separate segments (opening in back wall → spark plug) independent of the engine's fixed position.
Solution Approach 2:
The openings in the back wall act as intermediaries that mediate between the fixed engine position and the need for spark plug accessibility. These openings provide a passage through the housing compartment wall, enabling tool access to spark plugs without engine removal.
2Ease of operation
If the engine is removed for spark plug replacement, then the accessibility of spark plugs is improved, but the time and complexity of maintenance increases
Solution Approach 1:
The maintenance operation is segmented into a simplified process: remove wheel and suspension → access opening in back wall → replace spark plug. This segmentation eliminates the time-consuming step of engine removal while maintaining accessibility to spark plugs.
Solution Approach 2:
The essential components for spark plug access (wheel and suspension) are extracted temporarily, allowing direct access to the spark plugs through the openings in the back wall, while the engine remains in place. This selective extraction minimizes disassembly time.
3Ease of operation
If the engine is removed for spark plug replacement, then the accessibility of spark plugs is improved, but the device complexity and cost increases
Solution Approach 1:
The replacement process complexity is reduced by segmenting access to individual spark plugs through dedicated openings in the back wall. Each spark plug can be accessed independently through its own opening, simplifying the overall maintenance procedure compared to complete engine removal.
Solution Approach 2:
The housing compartment structure itself provides the access mechanism through the openings in the back wall. The design enables self-service maintenance where the vehicle's own structure facilitates spark plug replacement without requiring external equipment or complex disassembly procedures.
Data Source
AI summary
A car has an engine provided with a plurality of spark plugs and connected to two drive wheels, and a support frame defining a pair of housing compartments, each of which houses on the inside a relative drive wheel, and is delimited by a back wall, which faces at least part of the spark plugs of the engine, and is provided with at least one opening configured to allow a tool to remove at least one spark plug from the engine and to allow at least one spark plug to be mounted on the engine.