Multi-Cylinder Intake Device With Integrated Transpiration Gas Passage
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Solution Overview
Problem
The existing intake devices for multiple-cylinder engines have a complex transpiration gas passage requiring numerous components, leading to increased manufacturing costs, assembly complexity, and reduced operability due to the use of multiple types of rubber hoses and manual clip attachment.
Innovation Solution
The intake device incorporates a fuel delivery pipe with integrated transpiration gas and intake air pressure passages, using a single delivery pipe with branched passages and connection ports, reducing the number of components and simplifying assembly by using connection pipes to accommodate fabrication errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rubber hoses and three-way nipples are used to construct the transpiration gas passage, then the transpiration gas can be distributed to multiple bores, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent merges the transpiration gas passage and fuel delivery pipe into a single integrated component. The delivery pipe contains both fuel passages and transpiration gas passages, eliminating the need for separate rubber hoses and three-way nipples. This reduces the number of components while maintaining the capability to distribute transpiration gas to multiple bores.
Solution Approach 2:
The delivery pipe is designed to perform multiple functions: it delivers fuel to injectors and simultaneously distributes transpiration gas to multiple bores. This multi-functional design eliminates the need for separate dedicated transpiration gas passage components, reducing overall system complexity.
2Adaptability or versatility
If multiple types of rubber hoses with different lengths and shapes are used, then the transpiration gas passage can be configured for different engine types, but stock management becomes complicated
Solution Approach 1:
The integrated delivery pipe is designed as a universal component that can be adapted to different engine types through configuration changes rather than requiring different component types. The standardized design with adjustable passage arrangements allows a single base component to serve multiple applications.
Solution Approach 2:
The patent allows for parameter changes in the delivery pipe design (such as passage locations, angles, and lengths) to accommodate different engine configurations while maintaining the same fundamental component structure. This enables adaptation without requiring completely different components for each engine type.
3Reliability
If expensive rubber hoses with fluorine resin layers are used, then transpiration gas leakage is prevented, but manufacturing cost increases
Solution Approach 1:
The delivery pipe is constructed using composite materials that combine the necessary chemical resistance and leakage prevention properties with cost-effectiveness. The integrated design allows for optimized material selection that achieves the required reliability without the need for expensive fluorine resin layers on separate rubber hoses.
Solution Approach 2:
By merging the transpiration gas passage functionality into the fuel delivery pipe, the patent eliminates the need for separate expensive rubber hoses with fluorine resin coatings. The integrated pipe can be manufactured as a single piece with built-in leakage prevention features, reducing material and manufacturing costs.
4Reliability
If manual operations are required to attach clips to rubber hoses, then secure connections are achieved, but assembly time and operator burden increase
Solution Approach 1:
The integration of the transpiration gas passage into the delivery pipe eliminates the need for separate clip attachments to multiple rubber hoses. The unified structure requires fewer connection points and simplifies the assembly process, reducing both time and operator burden while maintaining connection security.
Solution Approach 2:
The patent extracts the complex clip-attachment operations by eliminating the separate rubber hose components. The integrated delivery pipe design removes the need for multiple manual clipping operations, leaving only essential connections that can be made more efficiently.
Data Source
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AI summary
The present invention provides an intake device and a fuel delivery pipe for a multiple-cylinder engine including a transpiration gas passage or an intake air pressure collecting passage capable of reducing the number of components and improving assembly operability. The intake device and the fuel delivery pipe for a multiple-cylinder engine include: a throttle body 2 including a plurality of bores 2La and 2Ra, each of which communicates with an inside of each cylinder of the engine, and provided with throttle valves 8 for adjusting intake volumes inside the bores 2La and 2Ra in an openable and closable manner; injectors 3 provided in the throttle body 2 and injecting a fuel to the bores 2La and 2Ra; a delivery pipe 4 for supplying the fuel to the injectors 3; and an intake pipe communication passage 5 connected to an inside of the bores 2La and 2Ra and communicating with the inside of the bores 2La and 2Ra, and the intake pipe communication passage 5 is formed integrally with the delivery pipe 4.