Turbocharger-to-DPF Connection Pipe Layout for Thermal Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional engine configurations with exhaust gas purification devices above the engine body face issues with thermal expansion, leading to potential damage and challenges in maintaining compactness due to the need to absorb thermal expansion caused by high-temperature exhaust gases.
Innovation Solution
The engine design includes a connection pipe that connects the turbocharger and exhaust gas purification device, arranged such that it extends below the turbocharger, allowing for a longer exhaust gas passage to absorb thermal expansion while maintaining a compact layout by positioning the turbocharger and exhaust manifold above the connection pipe, enabling a rational layout and space for other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the exhaust gas inlet of the DPF is disposed near the exhaust gas outlet of the turbocharger to form a short exhaust gas passage, then the layout is compact, but thermal expansion may occur and damage may occur at the connection part
Solution Approach 1:
The exhaust gas passage is routed in a three-dimensional space by passing below the turbocharger and extending in the longitudinal direction of the engine, rather than only in the vertical direction. This allows the passage to be both relatively long (to absorb thermal expansion) and not protrude outwardly (to maintain compactness), effectively using spatial arrangement to resolve the contradiction between passage length and engine compactness
Solution Approach 2:
The invention changes the geometric parameters of the exhaust gas passage, specifically making it extend in the longitudinal direction of the engine (parallel to the crankshaft) rather than only vertically. This parameter change allows the passage to absorb thermal expansion while maintaining a rational layout that does not compromise engine compactness
2Reliability
If the exhaust gas inlet of the DPF is disposed on a different side of the exhaust gas outlet of the turbocharger to avoid thermal expansion damage, then thermal expansion can be absorbed, but it is difficult to layout the exhaust gas passage in a rational manner while maintaining engine compactness
Solution Approach 1:
The exhaust gas passage utilizes the longitudinal space of the engine by passing below the turbocharger and extending parallel to the crankshaft. This three-dimensional routing approach allows the passage to be relatively long for thermal expansion absorption while maintaining a rational and compact layout, avoiding the need for complex external routing
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 a more compact engine layout while effectively absorbing thermal expansion, preventing damage and optimizing the arrangement of components, thus enhancing the engine's structural integrity and efficiency.
Implementation Method 1
since the temperature of exhaust gas is generally high, in the above-described configuration of Patent Literature 1, thermal expansion may occur in each of the exhaust gas inlet pipe of the DPF and the housing support body, which configure an exhaust gas passage, and damage may occur at the connection part with other parts and the like
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An engine (100) is provided with an engine body (1), an exhaust manifold (42), a turbocharger (24), an exhaust gas purification device (43), and a connection pipe (52) that connects the turbocharger (24) and the exhaust gas purification device (43). The connection pipe (52) is configured to guide exhaust gas from the exhaust manifold (42) that has passed through a turbine of the turbocharger (24) to the exhaust gas purification device (43), the connection pipe (52) has an upstream portion (52a) with a curved shape where one end is connected to a straight portion (52b) of the connection pipe (52) and the other end is connected to the turbocharger (24).