Pressure-Equalizing Diaphragm for Intake Gas Distribution
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Solution Overview
Problem
Internal combustion engines with multiple cylinder banks and separate intake air feeds face challenges in achieving uniform gas distribution between cylinder banks due to small pressure differences, leading to combustion process faults and adverse effects.
Innovation Solution
A control device connects gas feed line assemblies to a double-acting pressure box, using a spring-elastic diaphragm and throttle valves to equalize pressure and ensure uniform gas distribution by reducing underpressure through a sliding element mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate intake air feeds are used for each cylinder bank, then each cylinder bank can be supplied with intake air independently, but unequal distribution of gases between the two cylinder banks occurs due to small pressure differences
Solution Approach 1:
A common intake manifold is introduced as an intermediary component that receives gases from both cylinder banks' crank casings and distributes them uniformly to both banks. This mediator equalizes the pressure and flow characteristics, ensuring that despite small pressure differences between banks, the gas distribution remains uniform and controlled.
Solution Approach 2:
The patent merges the separate intake air feeds into a common intake manifold where gases from both cylinder banks are combined and then redistributed. This merging approach allows the system to maintain independent crank casing venting while achieving uniform gas distribution through the shared manifold structure.
2Reliability
If crank casing venting is implemented to prevent unburnt gases from escaping, then combustion efficiency is improved, but unequal gas distribution between cylinder banks occurs leading to combustion faults
Solution Approach 1:
The common intake manifold serves as a mediator that receives vented gases from both crank casings and redistributes them uniformly to both cylinder banks. This prevents the harmful effect of unequal gas distribution while maintaining the beneficial crank casing venting function, thereby eliminating combustion faults.
Solution Approach 2:
The system changes the pressure parameters in the intake manifold to ensure uniform gas distribution. By maintaining appropriate pressure levels and equalizing pressure differences between the two banks through the common manifold, the system prevents combustion faults while preserving the venting function.
3Stress or pressure
If pressure control valves are used for crank casing venting, then excessive pressure rise is prevented, but uniform distribution of gases between cylinder banks cannot be achieved
Solution Approach 1:
The patent combines the pressure control function with the gas distribution function by using a common intake manifold that receives gases from both crank casings. This merged approach allows simultaneous pressure control and uniform gas distribution, overcoming the limitation of separate pressure control valves.
Solution Approach 2:
The common intake manifold performs multiple functions: it acts as a pressure control element, a gas mixing chamber, and a uniform distribution system. This multi-functional design eliminates the need for separate pressure control valves while achieving both pressure management and uniform gas distribution.
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 solution effectively achieves uniform gas distribution in the intake air of internal combustion engines, particularly in throttled operating modes, preventing unequal gas introduction and associated combustion issues.
Implementation Method 1
the gas flow in the gas feed line assembly with the greater underpressure is reduced using a diaphragm that is deflected as a result of a pressure difference in the gas feed line assemblies
Implementation Method 2
The diaphragm can be embodied in a spring-elastic fashion or can be suspended from springs on one side or on both sides to return them to the home position again when pressure equalization occurs
Data Source
AI summary
A control device is provided for uniformly distributing gases and/or liquids between at least two containers with a different internal pressure, such as, fuel containers, crank casings and the like, in particular in internal combustion engines with more than one cylinder bank and a separate intake air feed per bank. The gas feed line assemblies (1) leading to the cylinder banks are connected to a chamber of a double-acting pressure box (4) and the gas flow in the gas feed line assembly (1) with the greater underpressure is reduced using a diaphragm (7) that is deflected as a result of a pressure difference in the gas feed line assemblies (1) by means of at least one throttle valve (10, 11) that can be activated via at least one sliding element (8, 9).