Low-Temperature Turbocompressor Intercooler for Inlet Air Cooling
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Solution Overview
Problem
Existing turbocompression systems for internal combustion engines face challenges in efficiently managing air compression, leading to increased air temperature, reduced air density, and the risk of abnormal combustion, which necessitates additional cooling measures and limitations on engine performance.
Innovation Solution
A low-temperature turbocompressor system that incorporates an exhaust gas turbine connected to a compressor, with an intercooler to cool the compressed air, which is then fed into an air intake turbine, allowing for the return of excess air to the compressor, thereby maintaining energy efficiency and reducing inlet air temperature, enabling denser air supply without increasing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If air is compressed by a turbocompressor, then the mass of air admitted into the cylinder increases, but the temperature of the air increases and density decreases
Solution Approach 1:
The patent applies preliminary cooling action by introducing an intercooler before the air enters the combustion chamber. The intercooler pre-cools the compressed air, reducing its temperature before it enters the cylinder, thereby preventing abnormal combustion while maintaining the increased mass of air provided by compression.
Solution Approach 2:
The intercooler acts as an intermediary component between the turbocompressor and the combustion chamber. It mediates the thermal state of the compressed air, removing excess heat and delivering cooler air to the engine, thus resolving the contradiction between maintaining high mass flow and controlling temperature.
2Power
If compression ratio is increased to improve engine power, then the mass of air admitted increases, but the risk of abnormal combustion increases
Solution Approach 1:
The intercooler performs preliminary cooling of the compressed air before it enters the combustion chamber. This preliminary action reduces the temperature and density of the air, thereby reducing the risk of abnormal combustion while allowing the engine to operate at higher compression ratios for improved power output.
Solution Approach 2:
The system changes the thermal parameter of the compressed air by cooling it in the intercooler. This parameter change (temperature reduction) allows the engine to tolerate higher compression ratios without suffering from abnormal combustion, thus enabling power improvement without the harmful side effect.
3Stress or pressure
If a wastegate valve is used to adjust pressure, then excess pressure is eliminated, but energy efficiency is reduced
Solution Approach 1:
The patent implements a feedback control system using a pressure sensor and controller that monitors the compression pressure and adjusts the wastegate valve position accordingly. This feedback mechanism ensures that pressure is maintained within optimal ranges, allowing the system to operate efficiently without excessive pressure relief, thereby minimizing energy loss.
Solution Approach 2:
The patent replaces the purely mechanical wastegate valve system with an electronically controlled system that uses sensors and a controller. This substitution allows for more precise control of pressure adjustment, reducing the need for excessive pressure relief and improving overall energy efficiency compared to traditional mechanical wastegate systems.
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 system supplies the engine with colder, denser air, enhancing engine performance by allowing greater fuel injection, more aggressive compression ratios, and advanced ignition timing without pre-ignition issues, while using the same amount of energy as conventional systems.
Implementation Method 1
an intercooler coupled to an output of the compressor, wherein the intercooler is configured to receive the compressed air stream from the compressor and discharge a cooled compressed air stream
Implementation Method 2
an exhaust gas turbine configured to receive exhaust gas from an internal combustion engine
Implementation Method 3
an air intake turbine configured to receive the cooled compressed air stream from the intercooler and to discharge an expanded cooled air stream to an internal combustion engine
Data Source
AI summary
A low-temperature turbocompressor structural arrangement for an internal combustion engine for using energy that is available but unused during operation to cool the air supplied to the engine by supercharging. The temperature of the air compressed by the compressor is reduced by a cooling system and the air is then conveyed to a further turbine actuated by the intake air flow of the engine. The structural arrangement may be mounted in full or in part, and also each component may be fitted into existing systems.