Engine Exhaust Purifier Vertical Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diesel engine exhaust gas purification systems face challenges in maintaining optimal temperatures for effective particulate matter and nitrogen oxide removal, leading to inefficient chemical reactions and space constraints in compact engine designs.
Innovation Solution
The engine device positions a diesel particulate filter (DPF) and a urea selective catalytic reduction (SCR) system on the upper surface of the engine, with the SCR system placed higher than the DPF and cooling fan, utilizing a case bracket to guide cooling airflow and a radiator support for compact installation and reduced temperature loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the DPF case and SCR case are mounted away from the engine, then the temperature of exhaust gas supplied to the cases is decreased, but the chemical reaction efficiency is reduced and additional heating devices are required
Solution Approach 1:
The patent positions the DPF case and SCR case on the upper surface of the engine in the vertical dimension, specifically above the cooling fan air flow path. This vertical arrangement allows the exhaust gas to maintain high temperature by avoiding the cooling air stream, while still being close to the engine for effective exhaust gas collection and chemical reaction efficiency is maintained
2Temperature
If the DPF case and SCR case are mounted close to the engine, then the temperature of exhaust gas in the SCR case is maintained at high temperature, but the engine room space is constrained and workability is reduced
Solution Approach 1:
The patent utilizes the vertical space above the engine by mounting the DPF case and SCR case on the upper surface, specifically above the cooling fan. This vertical arrangement allows the cases to be close to the engine for high temperature maintenance while occupying space that would otherwise be unused, thereby improving workability and assembly accessibility without compromising temperature
3Temperature
If the DPF case and SCR case are mounted close to the engine, then the temperature of exhaust gas is maintained, but the engine room becomes compact and assembly/maintenance workability is reduced
Solution Approach 1:
The patent arranges the DPF case and SCR case vertically above the engine's cooling fan in the upper surface area. This vertical positioning allows the cases to be integrated close to the engine for temperature maintenance while utilizing the vertical dimension rather than horizontal space, thereby reducing engine room compactness issues and improving assembly and maintenance accessibility
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 reduces temperature decrease of the filtration systems, allows for a compact design, improves workability, and enhances the assembly and maintenance of the exhaust gas purifiers by maintaining high temperatures and reducing overheating, while enabling independent operation and improved support for the filtration components.
Implementation Method 1
a cooling fan 24 for the engine 1; the first case 28 and the second case 29 are disposed at a position higher than an air flow path of the cooling fan 24
Data Source
AI summary
An engine device in which a first case and a second case can be installed in a compact manner while preventing a decrease of temperature of the first case and the second case due to cooling air for an engine. The engine device is equipped with the first case for removing particulate matter in exhaust gas of the engine, and the second case for removing nitrogen oxide in the exhaust gas of the engine. The first case and the second case are disposed on the upper surface side of the engine at a position higher than an air flow path of a cooling fan of the engine. The second case is disposed at a position higher than the first case.