Diesel Engine Exhaust Layout for Compact Turbo and After-Treatment Packaging
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Solution Overview
Problem
Existing diesel engines face challenges in achieving compactness due to the layout of turbochargers and exhaust gas after-treatment devices, which often extend in the engine width direction, increasing overall width or length and causing interference with other components.
Innovation Solution
The exhaust gas after-treatment device is arranged above the cylinder head to extend in the engine front-rear direction, with the turbocharger ejecting compressed air in the same direction to avoid interference and optimize space utilization, and the exhaust outlet is positioned centrally to minimize pipe length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the exhaust gas after-treatment device is arranged to extend in the engine width direction, then the engine overall width is determined by the length of the after-treatment device, but it becomes difficult to make the engine compact
Solution Approach 1:
The exhaust gas after-treatment device is reoriented from extending in the engine width direction to extending in the engine front-rear direction. This dimensional change allows the device to utilize the longer front-rear dimension of the engine (which is generally greater than the width direction), thereby reducing the engine overall width while maintaining the required length of the after-treatment device.
2Shape
If the exhaust gas after-treatment device is arranged above the cylinder head, then the engine overall width can be prevented from increasing, but the supercharging pipe extending in the engine width direction above the cylinder head may interfere with the after-treatment device
Solution Approach 1:
The supercharging pipe is reconfigured to extend in the engine front-rear direction instead of the engine width direction. This dimensional change eliminates the interference with the exhaust gas after-treatment device that is arranged above the cylinder head, while still delivering compressed air to the intake side.
Solution Approach 2:
Instead of extending the supercharging pipe in the conventional width direction above the cylinder head, the design inverts the approach by routing the pipe in the front-rear direction, thereby avoiding the spatial conflict with the after-treatment device.
3Ease of operation
If the turbocharger and after-treatment device are arranged side by side in the engine width direction, then mounting is facilitated, but the engine overall width is increased
Solution Approach 1:
The exhaust gas after-treatment device is reoriented to extend in the engine front-rear direction and positioned above the cylinder head, utilizing the vertical and front-rear dimensions instead of the width direction. This allows side-by-side mounting of components while preventing an increase in engine overall width.
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 design by reducing overall width and length while preventing interference between the turbocharger and after-treatment devices, enhancing cooling efficiency and facilitating easy pipe handling.
Implementation Method 1
a turbocharger in which a turbine, which is rotated by exhaust gas discharged from a combustion chamber, is used to rotationally drive a compressor
Implementation Method 2
compresses intake air by utilizing a flow of exhaust gas
Implementation Method 3
a Diesel Particulate Filter (DPF), which collects particulate matter in exhaust gas
Implementation Method 4
a Selective Catalytic Reduction (SCR), which causes NOx in the exhaust gas to be reduced by reduction reaction
Implementation Method 5
a cooling fan is provided on one side in an engine front-rear direction of the engine body part
Data Source
AI summary
This diesel engine includes a turbocharger which compresses intake air by utilizing a flow of exhaust gas, and an exhaust gas after-treatment device which purifies the exhaust gas, wherein an exhaust pipe connects the exhaust gas after treatment device and the turbocharger, and is connected upwardly to the exhaust gas after-treatment device. The exhaust pipe can have a curbed portion, and have one end and another end, and both ends can face towards a front direction of the diesel engine. The exhaust pipe can be extended to a rear side in the engine front-rear direction, then bent by 180 degrees, and after being extended to a front side in the engine front-rear direction below the turbocharger, can be bent upward and is connected to the exhaust gas after-treatment device. The turbocharger can have an intake ejection pipe which ejects the gas and faces towards the front direction.