Saddle Vehicle Rear Suspension Air Cleaner Exhaust Chamber Layout
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Solution Overview
Problem
Conventional saddle type vehicles face challenges in increasing the capacity of air cleaners and exhaust chambers while maintaining engine output and adhering to emission and noise standards, as larger sizes lead to reduced leg room, ground clearance, and bank angle due to spatial constraints.
Innovation Solution
The design positions at least a portion of the air cleaner above and the exhaust chamber below a horizontally arranged rear suspension, allowing for increased capacity without protruding and maintaining leg room and ground clearance, with the suspension coupled to the engine and swing-arm, enabling efficient use of space between the engine and rear wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the size of the air cleaner is increased, then the capacity of the air cleaner is improved, but the rider loses leg rest space
Solution Approach 1:
The air cleaner is repositioned from a horizontal arrangement to a vertical arrangement above the rear suspension, utilizing the vertical dimension to increase capacity without encroaching on horizontal leg rest space. This dimensional shift allows the air cleaner to expand upward rather than laterally, resolving the spatial conflict.
2Volume of stationary object
If the size of the exhaust chamber is increased, then the capacity of the exhaust chamber is improved, but the minimum ground clearance is reduced
Solution Approach 1:
The exhaust chamber is repositioned from a horizontal arrangement to a vertical arrangement below the rear suspension, utilizing the vertical dimension to increase capacity without reducing horizontal ground clearance. This allows the exhaust chamber to expand downward into previously underutilized space.
3Volume of stationary object
If the size of the air cleaner is increased, then the capacity of the air cleaner is improved, but the bank angle of the vehicle is reduced
Solution Approach 1:
The air cleaner is arranged vertically above the rear suspension, utilizing the vertical space between the suspension and the seat to increase capacity without extending horizontally and affecting the vehicle's bank angle. This vertical positioning maintains the vehicle's lateral profile.
4Object-affected harmful factors
If conventional vertical arrangement of rear suspension above exhaust chamber is used, then heat protection is achieved, but spatial flexibility is limited
Solution Approach 1:
The rear suspension is repositioned from a vertical arrangement to a horizontal arrangement, creating separate vertical zones above and below the suspension for the air cleaner and exhaust chamber respectively. This maintains heat protection through spatial separation while dramatically increasing spatial flexibility and component arrangement options.
Data Source
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AI summary
A saddle type vehicle (1) comprising a frame (2), an engine (3) supported by the frame (2), a swing-arm (7) swingably supported on the frame (2), a rear wheel (8) supported on the swing-arm (7), a rear suspension (9) arranged between the engine (3) and the rear wheel (8), an air cleaner (11) arranged on an intake passage, and an exhaust chamber (12) arranged on an exhaust passage wherein at least a portion of the air cleaner (11) is arranged above the rear suspension (9), at least a portion of the exhaust chamber (12) is arranged below the rear suspension (9), the rear suspension (9) extends in a direction intersecting with a vertical direction when viewed from a side of the saddle type vehicle, the rear suspension (9) is coupled to the engine (3) and the swing-arm (7) and a height of the rear suspension (9) in the vertical direction is smaller than a length of the rear suspension (9) in a front-back direction.