Eccentric Regulating Element for Engine Intake Flow Control
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Solution Overview
Problem
Existing regulating devices for internal combustion engines experience pressure losses and performance degradation due to throttling and turbulence caused by the combination of gas flows in turbocharged engines, leading to reduced compressor and engine performance.
Innovation Solution
A regulating device with an eccentrically mounted regulating element and guide ribs on its surface, which directs air flow to minimize turbulences and optimize flow alignment, reducing pressure losses and improving flow efficiency by straightening and controlling the air and exhaust gas flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the throttle damper is closed to increase exhaust gas recirculation rate, then the exhaust gas recirculation rate is improved, but the pressure gradient increases and compressor performance deteriorates
Solution Approach 1:
The regulating element is divided into two separate regulating surfaces: a first regulating surface for the air intake pipe and a second regulating surface for the exhaust gas recirculation pipe. This segmentation allows independent control of air flow and exhaust gas flow, enabling the exhaust gas recirculation rate to be increased without proportionally restricting air flow, thereby maintaining better compressor performance while achieving the desired exhaust gas recirculation rate.
2Measurement precision
If two separate valves are used for air intake and exhaust gas recirculation regulation, then the flow regulation precision is improved, but the device complexity increases
Solution Approach 1:
Two separate regulating functions (air intake regulation and exhaust gas recirculation regulation) are merged into a single regulating element with two distinct regulating surfaces. This unified approach maintains the precision of separate valve control while reducing device complexity by eliminating the need for two separate valves and their associated actuation mechanisms.
3Quantity of substance
If the exhaust gas recirculation valve is opened while the throttle damper is closed, then the exhaust gas recirculation rate is improved, but the pressure gradient in the exhaust gas recirculation pipe increases
Solution Approach 1:
The regulating element segments the control functions so that the first regulating surface controls air intake while the second regulating surface controls exhaust gas recirculation. This allows the exhaust gas recirculation valve to be opened without requiring proportional closing of the throttle damper, as air flow can be independently maintained, thereby reducing the pressure gradient in the exhaust gas recirculation pipe while still increasing the exhaust gas recirculation rate.
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
The device achieves reduced pressure losses and enhanced performance of downstream compressors and internal combustion engines by minimizing flow resistances and turbulences, ensuring efficient gas flow regulation and improved engine performance.
Implementation Method 1
guide ribs arranged on the first surface... direct air flow to minimize turbulences and optimize flow alignment, reducing pressure losses and improving flow efficiency by straightening and controlling the air and exhaust gas flows
Data Source
AI summary
A regulating device for an internal combustion engine includes an exhaust gas recirculation pipe which opens into an intake pipe which are both formed in a housing, and a regulating element eccentrically mounted on a shaft. The shaft is arranged perpendicular to a center line of the intake pipe and the exhaust gas recirculation pipe. The regulating element includes a first surface, a second surface, and guide ribs arranged on the first surface. In a first end position of the regulating element, in which the intake pipe is at least throttled upstream of an opening of the exhaust gas recirculation pipe, a normal vector of the first surface points to an upstream side of the intake pipe. In a second end position of the regulating element, in which the exhaust gas recirculation pipe is closed, a normal vector of the second surface points to the exhaust gas recirculation pipe.