Integrated EGR Cooler in Engine Crankcase for Heat Transfer
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Solution Overview
Problem
The existing internal combustion engine EGR system mounting is inefficient, leading to suboptimal heat transfer and lack of adaptability in exhaust gas distribution to individual cylinder units.
Innovation Solution
Incorporating turbulence generators and diaphragms/throttle devices into the EGR system, ensuring improved heat transfer and individual cylinder unit adaptation through enhanced coolant flow turbulence and controlled exhaust gas quantity adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional EGR system with distribution line and fresh gas channels is used, then exhaust gas can be distributed to cylinder units, but the mounting is inefficient and heat transfer is suboptimal
Solution Approach 1:
The patent integrates the EGR cooler directly into the crankcase structure, merging the cooling function with the engine housing. This eliminates separate mounting requirements and optimizes heat transfer by placing the cooler in direct thermal contact with the crankcase, which acts as a heat sink.
Solution Approach 2:
The patent introduces a coolant passage system as an intermediary medium between the exhaust gas and the external cooling system. Coolant flows through passages in the crankcase, absorbing heat from the EGR gas and transferring it to the cooling system, thereby optimizing heat transfer efficiency.
2Temperature
If turbulence generators are added to the cooling section, then heat transfer becomes more effective, but device complexity increases
Solution Approach 1:
The patent employs turbulence generators within the coolant passages to create controlled chaotic flow patterns. This mechanical disruption of laminar flow enhances convective heat transfer by preventing thermal boundary layer formation, thereby improving heat transfer efficiency without requiring external energy input.
3Adaptability or versatility
If diaphragms and throttle devices are inserted into channels, then individual adaptation of exhaust gas quantity to cylinder units is achieved, but device complexity increases
Solution Approach 1:
The patent divides the EGR distribution system into separate controllable channels for different cylinder units. Each channel is equipped with its own diaphragm and throttle device, enabling independent control of exhaust gas quantity to each cylinder unit, thereby achieving individual adaptation.
Solution Approach 2:
The patent incorporates movable diaphragms and adjustable throttle devices that can dynamically change the flow characteristics of exhaust gas to each cylinder unit. These components can be actuated to adapt the exhaust gas distribution in real-time based on engine operating conditions and cylinder-specific requirements.
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 results in a more compact engine design with efficient heat transfer and adaptable exhaust gas distribution, optimizing engine performance and heat management.
Implementation Method 1
an exhaust gas cooler (13) having an exhaust gas inlet (5) and a coolant inlet opening (3) and an integrated exhaust gas feed-through (6) through the crankcase (1)
Implementation Method 2
coolant enters the sealing plane of smooth flange surface (2) via coolant inlet opening (3), absorbs the heat of the exhaust gas and leaves the cooler via coolant outlet opening (4)
Implementation Method 3
the cooling section includes turbulence generators, which ensure an even better heat transfer
Implementation Method 4
diaphragms and/or throttle devices are inserted into the channels. An individual adaptation of the exhaust gas quantity supplied to the individual cylinder units may take place with the aid of these components
Data Source
AI summary
An internal combustion engine having a crankcase and a cylinder head is provided. The internal combustion engine includes at least one cylinder block, at least one cooler, at least one smooth flange surface for accommodating the at least one cooler, at least one coolant inlet to the cooler, at least one coolant outlet from the cooler, at least one exhaust gas inlet to the cooler, at least one integrated exhaust gas feed-through from the cooler and at least one internal cooling section.