Integrated Exhaust Purification Unit for Work Vehicle Engine Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing engine devices for work vehicles face challenges in maintaining the temperature of exhaust gas in diesel particulate filters (DPF) and selective catalyst reduction (SCR) systems, leading to incomplete regeneration and chemical reactions, and require complex mounting configurations that complicate assembly and maintenance, especially in compact engine rooms.
Innovation Solution
The engine device integrates a diesel particulate filter and a urea selective catalyst reduction system via a urea mixing pipe, with a clamping body for secure attachment, and uses a supporting stand and leg bodies to position the exhaust purification unit on the engine, allowing for adjustable mounting and easy assembly/disassembly, reducing bulk and improving workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the DPF case and SCR case are assembled while being separated from the engine, then the exhaust gas temperature is reduced, but the regeneration and chemical reaction become incomplete
Solution Approach 1:
The exhaust purification unit is pre-assembled with the DPF case and SCR case connected via the urea mixing pipe before installation on the engine. This preliminary assembly ensures proper alignment and connection, allowing the unit to be installed as a single integrated component while maintaining exhaust gas temperature and purification effectiveness.
2Ease of manufacture
If the DPF case and SCR case are mounted on two parallel base frames, then the mounting structure is formed, but the supporting posture cannot be maintained due to machining errors
Solution Approach 1:
The DPF case and SCR case are merged into a single exhaust purification unit that is mounted on a single base frame rather than two separate base frames. This consolidation eliminates the need for precise alignment between multiple mounting surfaces and reduces the impact of machining errors on the overall mounting posture.
Solution Approach 2:
The single base frame serves as a universal mounting structure for both the DPF case and SCR case, providing a common reference plane that ensures proper positioning and posture for both components simultaneously, reducing sensitivity to individual machining variations.
3Temperature
If the SCR case is assembled in the proximity of the engine, then the exhaust gas temperature is maintained, but the installation space is increased
Solution Approach 1:
The exhaust purification unit is positioned in the vertical dimension above the engine rather than extending laterally, utilizing the vertical space above the engine block. This dimensional change allows the SCR case to be close to the engine for temperature maintenance while keeping the horizontal footprint compact.
Solution Approach 2:
The exhaust purification unit is nested within the existing engine bay space, with the DPF case and SCR case arranged to fit within the available volume around the engine, maximizing space utilization without requiring additional installation space.
4Volume of moving object
If the DPF case and SCR case are integrated into a compact unit, then the engine room space is reduced, but the assembly and maintenance workability is decreased
Solution Approach 1:
The exhaust purification unit is designed as a segmented modular assembly where the DPF case and SCR case are connected via the urea mixing pipe but can be independently accessed and serviced. The clamping body provides a separation point that allows technicians to work on individual components while maintaining the compact integrated structure.
Solution Approach 2:
The urea mixing pipe serves as an intermediary connection between the DPF case and SCR case, allowing for flexible routing and access while maintaining the compact integration. This intermediary component facilitates assembly and maintenance operations by providing access points and connection flexibility within the compact unit.
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 ensures effective temperature maintenance for the SCR system, simplifies assembly and maintenance, reduces bulk, and integrates the exhaust purification unit with the engine's vibration structure, lowering costs and improving workability in compact spaces.
Implementation Method 1
a first case (28) for removing particulate matter in exhaust gas of an engine
Implementation Method 2
the temperature of the exhaust gas supplied from the engine to the DPF case or the SCR case is reduced, which leads to incompletion of regeneration of a diesel particulate filter
Implementation Method 3
a second case (29) for removing nitrogen oxides in the exhaust gas of an engine
Implementation Method 4
incompletion of chemical reaction such as selective catalyst reduction action
Implementation Method 5
configured to connect the first case (28) to the second case (29) via a urea mixing pipe (39)
Data Source
AI summary
An engine device for a work vehicle, in which an exhaust purification unit can be placed on an engine in the neighborhood of the final process in the assembly work of the engine, thereby improving the assembly workability of the engine. The engine device includes a first case that removes particulate matter in the exhaust gas of the engine and a second case that removes nitrogen oxides in the exhaust gas of the engine and connects the first case to the second case via a urea mixing pipe. The first case and the second case are integrally adhered by means of clamping bodies, and, thereby forming an exhaust purification unit, and the exhaust purification unit is configured to be supported by the engine via the clamping bodies, and in a detachable manner.