Compact Multicylinder Engine Intake Device Layout
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Solution Overview
Problem
Intake devices for multicylinder engines face challenges in compactness due to the dispersed layout of fuel injection valves, vacuum conduits, and purge conduits, making them difficult to miniaturize effectively.
Innovation Solution
The solution involves a compact intake device design where fuel injection valves, vacuum conduits, and purge conduits are strategically positioned on throttle bodies with perpendicularly opening connecting tubes, offset joints, and flexible materials, allowing for a compact and efficient arrangement that minimizes conduit length and interference, and uses coupling plates for protection and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If fuel injection valves, vacuum conduits, and purge conduits are disposed in a dispersed layout, then each component can be individually accessed and maintained, but the overall intake device becomes difficult to make compact
Solution Approach 1:
The patent merges the fuel injection valve, vacuum conduit, and purge conduit into an integrated throttle body assembly. The fuel injection valve is mounted on the throttle body, and both the vacuum conduit and purge conduit are connected to the throttle body in a consolidated manner, eliminating the need for dispersed layout and reducing overall device volume while maintaining accessibility for maintenance.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by positioning the fuel injection valve, vacuum conduit, and purge conduit at different locations and orientations on the throttle body. This dimensional arrangement allows all components to be compactly integrated without interfering with each other, achieving compactness while preserving individual component accessibility.
2Length of stationary object
If conduits are made longer and more bent to connect dispersed components, then connectivity is maintained, but device size increases and manufacturing cost increases
Solution Approach 1:
By consolidating all conduit connections to the throttle body in one location, the patent significantly reduces the total length of conduits required. The vacuum conduit and purge conduit both connect directly to the throttle body, eliminating the need for long, bent pathways that would be required in a dispersed layout, thereby reducing manufacturing cost and simplifying the overall structure.
3Volume of moving object
If components are arranged compactly with minimal spacing, then device compactness is achieved, but interference between components may occur
Solution Approach 1:
The patent resolves potential component interference by arranging the fuel injection valve, vacuum conduit, and purge conduit in different spatial dimensions and orientations on the throttle body. This three-dimensional arrangement allows compact integration while maintaining sufficient clearance between components, preventing interference while achieving minimal device size.
Data Source
AI summary
A compact intake device for a multicylinder engine includes fuel injection valves, vacuum conduits, and purge conduits compactly disposed on throttle bodies. First and second connecting tubes are disposed on a plurality of throttle bodies of a multicylinder engine and are open into intake passages in the throttle bodies substantially perpendicularly to the axes of the intake passages. The first and second connecting tubes are disposed in sandwiching relation to fuel injection valves. Purge conduits are connected to the first connecting tubes, and vacuum conduits are connected to the second connecting tubes.