Integrated Intake Manifold Canister Circuit
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Solution Overview
Problem
The canister circuit of a supercharged internal combustion engine is complex and time-consuming to assemble due to its extensive external components, leading to increased assembly costs and complexity.
Innovation Solution
An integrated intake manifold with a simplified canister circuit design that incorporates a single flexible tube and one-way membrane valves, reducing the number of components and allowing for a controlled flow of gasoline vapors, thereby simplifying assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the canister circuit uses a fork in the recovery pipe with one-way membrane valves to handle both vacuum and overpressure conditions, then the circuit can function properly under turbocharger operation, but the number of external components increases and assembly complexity increases
Solution Approach 1:
The patent integrates the canister circuit components directly into the intake manifold structure. The recovery pipe is formed as an integrated part of the intake manifold body, and the one-way membrane valves are incorporated within the manifold housing rather than being separate external components. This merging eliminates the need for separate fork structures and reduces the number of discrete parts that require assembly.
Solution Approach 2:
The intake manifold is designed to perform multiple functions: it serves as both the air intake component and the canister circuit housing. The manifold body accommodates both the vacuum condition pathway and the overpressure condition pathway within its single structure, allowing one component to fulfill multiple roles that previously required separate dedicated parts.
2Adaptability or versatility
If the canister circuit includes multiple external tubings and pipe fittings to manage vapor flow, then the circuit can adapt to different operating conditions, but the assembly time increases
Solution Approach 1:
Multiple tubing functions are merged into a single integrated recovery pipe structure formed within the intake manifold. The recovery pipe includes both the first pathway (for vacuum conditions) and the second pathway (for overpressure conditions) as integral parts of the manifold body, eliminating the need for multiple separate tubings and their associated fittings.
Solution Approach 2:
The recovery pipe is segmented into different pathways within the single manifold structure. The first pathway connects to the first port for vacuum operation, while the second pathway connects to the second port for overpressure operation. This segmentation allows independent flow control for different conditions while maintaining a unified component structure that reduces assembly complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integrated design results in a quicker, cost-effective, and more straightforward assembly process with minimal components, ensuring a controlled flow of gasoline vapors and enhanced durability due to the use of a single flexible tube and one-way valves.
Implementation Method 1
When the turbocharger is not running, there is a slight vacuum determined by the aspiration action of the cylinders in the intake manifold plenum, while there is atmospheric pressure in the intake pipe upstream of the compressor; in this situation, the one-way membrane valve allows the gasoline vapours to enter the intake manifold plenum directly. When the compressor is running, there is an overpressure determined by the compression action of the compressor in the intake manifold plenum, while there is a vacuum determined by the intake action of the compressor in the intake pipe upstream of the compressor
Data Source
AI summary
An intake manifold with integrated canister circuit for a supercharged internal combustion engine provided with: a tubular body in which a plenum is defined; a sorting chamber obtained in a wall of the tubular body; a canister solenoid valve arranged in the sorting chamber and is adapted to adjust the introduction of gasoline vapours into the sorting chamber; a first pipe, which is obtained in the wall of the tubular body, puts the sorting chamber into communication with the plenum, and defines a first branch of a recovery pipe; a second pipe, which is obtained in the wall of the tubular body and defines an initial portion of a second branch of the recovery pipe; a first one-way valve which allows, through the first pipe, only a flow towards the plenum; a second one-way valve which allows, through the second pipe, only a flow through the intake pipe.