Motorcycle Intake Pipe Fuel Injector Placement
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Solution Overview
Problem
In conventional vehicles, the body frame and fuel injector often interfere with each other due to their upper placement, leading to operational inefficiencies and potential mechanical issues.
Innovation Solution
The vehicle design features an engine with a rearward-inclined cylinder axis, where the intake pipe is positioned between the body frame and engine, extending obliquely upward, and the fuel injector is mounted on the side opposed to the body frame, allowing a straight connecting part and preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the body frame and fuel injector are both located on the upper side of the intake pipe, then the vehicle structure can be compact, but the body frame and fuel injector tend to interfere with each other
Solution Approach 1:
The patent applies dimensionality change by repositioning the fuel injector from the upper side of the intake pipe to the lower side, utilizing the vertical dimension to resolve the spatial conflict. This allows the body frame to pass over the intake pipe without interfering with the fuel injector, which is now mounted on the opposite side, thereby eliminating interference while maintaining compact vehicle structure.
2Object-affected harmful factors
If the intake pipe extends obliquely upward, then the fuel injector can be positioned away from the body frame, but the intake resistance may increase
Solution Approach 1:
The intake pipe is segmented into multiple sections: a first section extending horizontally from the engine, a second section extending obliquely upward, and a third section connecting to the air box. This segmentation allows the pipe to change direction gradually, reducing flow resistance while positioning the fuel injector on the lower side away from the body frame interference zone.
Solution Approach 2:
The intake pipe incorporates curved transitions between sections rather than sharp angles, smoothing the airflow path. The oblique extension is designed with appropriate curvature to minimize turbulence and pressure loss, thereby reducing intake resistance while achieving the necessary spatial positioning.
Data Source
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AI summary
The present invention relates to a vehicle, in particular motorcycle, comprising: an engine (29) disposed with its cylinder axis (L1) inclined rearward; a body frame, wherein a front part (9) of the body frame is located in front of the engine (29) and extends downward to the rear; an intake pipe (43) located between the front part (9) of the body frame and the engine (29) and connected to a forward side of the engine (29) to extend obliquely upward; and at least one fuel injector (41) mounted to the intake pipe (43), wherein the intake pipe (43) has a straight connecting part (36) that is connected to the engine (29), and the fuel injector (41) is mounted on the side opposed to the front part (9) of the body frame with respect to the straight connecting part (36).