Tractor Engine Bonnet Segmentation for Easier Opening
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Solution Overview
Problem
The configuration of exhaust-gas cleaning apparatuses above and behind the engine in tractors increases the up-down and front-back length of the engine compartment, necessitating a large engine bonnet that is difficult to open and close and complicates production.
Innovation Solution
The engine compartment is divided into a front and back portion, with a separate front bonnet covering the front compartment and a swingable support allowing easy opening and closing, and a back bonnet covering the back compartment, facilitating production and preventing water ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single large engine bonnet is used to cover the entire engine compartment, then the engine compartment can be fully enclosed, but the bonnet becomes difficult to open and close and complicates production
Solution Approach 1:
The engine bonnet is divided into two separate parts: a front bonnet and a back bonnet. The front bonnet can be opened and closed independently to provide access to the engine and front components, while the back bonnet covers the rear section. This segmentation allows the front bonnet to be operated separately for maintenance access without requiring opening of the entire large bonnet, thus improving ease of operation while maintaining complete enclosure when both are closed
2Reliability
If a single large engine bonnet is used to cover the entire engine compartment, then the engine compartment can be fully enclosed, but the production process becomes more complex
Solution Approach 1:
The engine bonnet is divided into a front bonnet and a back bonnet that can be manufactured separately as smaller, more manageable components. This segmentation allows each bonnet section to be produced independently using standard manufacturing processes, reducing tooling requirements and simplifying assembly compared to producing and handling a single large bonnet structure
3Reliability
If exhaust-gas cleaning apparatuses are disposed above and behind the engine, then exhaust gas cleaning is achieved, but the engine compartment dimensions increase
Solution Approach 1:
The exhaust-gas cleaning apparatuses are arranged in a longitudinal layout along the engine compartment, with the first apparatus positioned above the engine and the second apparatus positioned behind it. This dimensional arrangement allows both cleaning devices to be accommodated within the available space by utilizing the front-back dimension of the engine compartment, thereby achieving complete exhaust gas cleaning functionality without excessive increase in overall compartment dimensions
Data Source
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AI summary
[Object] To facilitate opening and closing an engine compartment in a tractor in whose engine compartment a first exhaust-gas cleaning apparatus is provided above an engine and a second exhaust-gas cleaning apparatus is provided behind the engine and to facilitate production of an engine bonnet. [Resolution Means] An engine bonnet 16 has a back bonnet 30, which covers a back engine compartment portion 15B-wherein a second exhaust-gas cleaning apparatus 22 is positioned-of an engine compartment 15, and a front bonnet 31, which covers a front engine compartment portion 15F-positioned on a vehicle-body front side of the back engine compartment portion 15B-of the engine compartment 15. The back bonnet 30 and the front bonnet 31 are configured as separate bodies. The front bonnet 31 is supported so as to be able to swing open and closed.