Exhaust Duct Locking Element for Engine Braking and EGR Control
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Solution Overview
Problem
Conventional exhaust tracts for internal combustion engines face complexity and difficulty in achieving high engine braking powers while maintaining low emissions and simplicity.
Innovation Solution
An exhaust tract design with a single blocking element that controls both the exhaust gas recirculation line and a connection opening between two exhaust gas flows, allowing exhaust gas to be diverted from one flow to the other to increase turbine flow and achieve high engine braking power without additional locking elements, while also enabling adjustable recirculation rates for emission reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple locking elements are used to control bypass line and exhaust gas recirculation line separately, then fluid control precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple locking elements into a single locking element that controls both the bypass line and exhaust gas recirculation line simultaneously. This merging reduces the number of components and simplifies the device structure while maintaining the ability to precisely control fluid flow paths through different operating positions (first closed position, first open position, second open position).
Solution Approach 2:
The single locking element is designed to perform multiple functions: it controls both the bypass line and exhaust gas recirculation line, and it manages multiple fluid flow paths (exhaust gas recirculation, engine braking mode, normal operation). This multi-functionality reduces component count while maintaining control precision through its ability to assume different positions.
2Power
If additional locking elements are added to achieve high engine braking power, then engine braking performance is improved, but device complexity and weight increase
Solution Approach 1:
The patent merges the control of exhaust gas recirculation and engine braking functions into a single locking element that can direct exhaust gas flows to achieve high engine braking power without requiring additional locking elements. The unified design reduces component count while maintaining high braking performance through optimized fluid flow control.
Solution Approach 2:
The single locking element is designed to universally control multiple exhaust gas flow paths, enabling both exhaust gas recirculation and engine braking modes. This multi-functional design achieves high engine braking power without the need for separate dedicated components, thereby reducing overall device complexity and weight.
3Object-generated harmful factors
If exhaust gas recirculation line is always open, then emission reduction is improved, but engine braking performance deteriorates
Solution Approach 1:
The patent implements a dynamic control system where the locking element can switch between different positions (first closed position, first open position, second open position) to adaptively control exhaust gas recirculation. This dynamic adjustment allows the system to optimize for emission reduction during normal operation while enabling high engine braking performance when needed, resolving the contradiction between continuous recirculation and braking performance.
Solution Approach 2:
The system changes the flow parameters of exhaust gas by adjusting the locking element position. In the first open position, exhaust gas recirculation is enabled for emission reduction. In the second open position, the system redirects exhaust gas flows to achieve high engine braking power. This parameter change approach allows optimal performance in different operating conditions without compromise.
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 design allows for high engine braking power with reduced complexity and emissions, maintaining low parts count and weight, and enabling efficient operation with adjustable recirculation rates for optimal engine performance and emission control.
Implementation Method 1
a connecting opening between the exhaust gas flows is released in a first closed position of the locking element and is blocked by the locking element in a second open position. Exhaust gas from the first exhaust gas flow can be diverted via the connecting opening and fed to the second exhaust gas flow.
Implementation Method 2
The EGR line serves to recirculate exhaust gas from the internal combustion engine to one of its intake sides, thus enabling low-emission operation of the engine.
Implementation Method 3
the first exhaust gas flow is fluidically blocked by the blocking element in the first closed position, at least downstream of the connecting opening
Data Source
Figure 1
AI summary
The invention relates to an exhaust gas system (10) for an internal combustion engine, comprising an exhaust gas flow, which is associated with a first turbine flow of a turbine of an exhaust gas turbocharger and through which exhaust gas of the internal combustion engine can flow, a second exhaust gas flow (16), which is at least partially fluidically separated from the first exhaust gas flow (14), is associated with a second turbine flow of the turbine and through which exhaust gas of the internal combustion engine can flow, an exhaust gas recirculation line (22), which branches off from the first exhaust gas flow (14), and a shutting element (26), which can be displaced between at least one first closing position (1), which prevents exhaust gas from flowing from the first exhaust gas flow (14) into the exhaust gas recirculation line (22), and at least one first open position (2), which enables exhaust gas to flow from the first exhaust gas flow (14) into the exhaust gas recirculation line (22), wherein a fluid connection (30) between the exhaust gas flows (14, 16), via which fluid connection exhaust gas can branch off from the first exhaust gas flow (14) and can be supplied to the second exhaust gas flow (16), is released in the first closing position (1) by means of the shutting element (26) and is shut in the first open positon (2) by means of the shutting element (26).