V-Type Engine Exhaust Pipe Merging for Compact Catalyst Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In V-type engines, the requirement for an exhaust expansion chamber and catalyst placement complicates exhaust pipe arrangement, making it difficult to downsize the engine while maintaining effective exhaust gas purification.
Innovation Solution
The exhaust pipes from each bank are merged and converge towards the cylinder head, with a catalyst holder positioned at the merge point, eliminating the need for an exhaust expansion chamber and allowing for efficient exhaust gas purification using a single catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If an exhaust expansion chamber and catalyst are installed for exhaust gas purification, then exhaust gas purification is improved, but engine size increases
Solution Approach 1:
The exhaust pipes from both banks are merged into a single common exhaust pipe, and a single catalyst is installed in this merged pipe. This combines the exhaust flow paths and purification functions, eliminating the need for separate expansion chambers and multiple catalysts, thereby reducing overall engine size while maintaining effective exhaust gas purification.
Solution Approach 2:
The exhaust pipes are drawn toward the cylinder head side in a spatial arrangement that utilizes the vertical dimension and available space around the cylinder head. This three-dimensional routing allows the exhaust pipes to converge naturally without requiring additional horizontal space for expansion chambers, enabling compact engine layout.
2Object-generated harmful factors
If exhaust pipes are arranged for each bank with expansion chambers, then exhaust gas purification is achieved, but exhaust pipe arrangement becomes complex
Solution Approach 1:
Instead of maintaining separate exhaust pipe systems for each bank with individual expansion chambers, the invention merges both exhaust streams into a single common pipe with one catalyst. This simplification reduces the number of components and their interconnections, making the exhaust pipe arrangement significantly easier to design, manufacture, and maintain.
3Object-generated harmful factors
If multiple catalysts are installed in separate exhaust pipes, then exhaust gas purification is improved, but manufacturing cost increases
Solution Approach 1:
The invention consolidates the exhaust purification function into a single catalyst installed in the merged common exhaust pipe. This eliminates the need to manufacture, stock, and install multiple separate catalysts, thereby reducing manufacturing costs while still achieving effective purification of exhaust gases from both banks through the single catalytic converter.
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
This configuration allows for the downsizing of the V-type engine while ensuring effective exhaust gas purification, reducing the number of catalysts needed and optimizing space usage, thereby reducing manufacturing costs and engine size.
Implementation Method 1
a catalyst holder that holds a catalyst is provided in a merge portion of the exhaust pipes
Data Source
AI summary
A V-type engine in which exhaust pipe arrangement is easily performed even in a V-type engine and that can be downsized even when a catalyst is installed. The engine has cylinders where pistons operate are arranged in a V-shape, a crankshaft driven by the driving of the pistons is disposed vertically, exhaust pipes communicating with exhaust openings in the respective banks of a cylinder head are included, merging exhaust pipes (exhaust pipes) in the respective banks are drawn toward a side of the cylinder head to be merged, and a catalyst holder that holds a catalyst is provided in a merge portion of the merging exhaust pipes. In this manner, since the merging exhaust pipes in the respective banks are merged and the catalyst holder is provided in this merge portion, exhaust gas from each bank can be purified by the catalyst.