Electric Supercharger Third Path Engine Responsiveness
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Solution Overview
Problem
Existing supercharging systems for engines face limitations in compressing intake air using only exhaust gas pressure, leading to reduced engine responsiveness and stability, particularly during turbo-lag intervals.
Innovation Solution
A supercharging system that incorporates an electric supercharger connected between the intercooler and intake manifold, with a third supercharge path to directly supply compressed air to the exhaust manifold, along with control valves and sensors to manage air flow and pressure, enhancing engine responsiveness and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the air jetting flow channel length is reduced to enhance engine responsiveness, then engine responsiveness is improved, but the system complexity increases due to additional components needed for stable operation
Solution Approach 1:
The supercharging system is divided into multiple independent paths: a first supercharge path for primary air supply, a second supercharge path for intermediate air supply, and a third supercharge path for direct jetting to the exhaust manifold. This segmentation allows each path to be optimized for specific functions, enabling rapid air delivery to enhance responsiveness while maintaining system stability through distributed control mechanisms.
Solution Approach 2:
An electric supercharger is introduced as an intermediary component between the intercooler and the intake manifold, and additionally connected to the exhaust manifold through the third supercharge path. This intermediary device enables precise control over air delivery timing and quantity, allowing the system to achieve rapid responsiveness by jetting air directly to the exhaust manifold while maintaining stable operation through coordinated control with the turbocharger.
2Speed
If compressed air is jetted to the exhaust manifold to enhance engine responsiveness during turbo-lag, then engine responsiveness is improved, but air discharge stability becomes problematic
Solution Approach 1:
The system maintains continuous air supply through multiple supercharge paths operating in coordination. The first supercharge path provides continuous primary air supply, the second path provides intermediate supply, and the third path provides targeted jetting to the exhaust manifold. This multi-path continuous supply ensures that when air is jetted to enhance responsiveness, there is always a backup path maintaining stable air delivery to prevent discharge instability.
Solution Approach 2:
Different parts of the air supply system have specialized functions optimized for their specific roles. The third supercharge path is specifically designed for rapid air jetting to the exhaust manifold to enhance responsiveness, while the first and second supercharge paths are optimized for stable continuous supply. This local optimization allows aggressive jetting behavior in the third path without compromising overall system stability, as the other paths maintain steady operation.
3Speed
If an electric supercharger is added to compress and supply air through a third supercharge path, then engine responsiveness is enhanced, but the device complexity increases
Solution Approach 1:
The electric supercharger serves multiple functions within the system: it compresses air for the second supercharge path supplying the intake manifold, and simultaneously supplies compressed air through the third supercharge path for direct jetting to the exhaust manifold. This multi-functionality allows a single component to enhance responsiveness through the third path while maintaining stable air supply through the second path, justifying the added device complexity through versatile performance.
Solution Approach 2:
The electric supercharger provides dynamic control over air delivery timing and quantity. It can rapidly adjust compression and delivery rates to match engine demands, enabling precise control of the air jetting to the exhaust manifold for responsiveness enhancement. This dynamic capability allows the system to optimize performance across varying operating conditions, making the additional device complexity worthwhile through adaptive performance optimization.
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 effectively shortens the air jetting flow path, enhancing engine responsiveness and stabilizing engine operation by efficiently discharging supercharged air, while ensuring stabilization even during abnormal electric supercharger operation.
Implementation Method 1
an electric supercharger that drives a compressor by using an electric motor to compress intake air and supplies the same
Implementation Method 2
a turbo charger compressing ambient air by using pressure of exhaust gas discharged from the combustion chamber
Implementation Method 3
an intercooler cooling compressed air supplied from the turbo charger to the combustion chamber
Implementation Method 4
an EGR cooler cooling exhaust gas may be installed in the recirculation path
Data Source
AI summary
A supercharging system for an engine includes: a cylinder block forming a combustion chamber; an intake manifold connected to the cylinder block to supply ambient air thereto; an exhaust manifold collecting exhaust gas discharged from the combustion chamber and guiding the same to the environment; a third supercharge path connecting an inlet of the intake manifold to the exhaust manifold; and an electric supercharger supplying compressed air to the exhaust manifold through the third supercharge path. Responsiveness of an engine is enhanced and stabilization of the engine is promoted.