Electric Motor-Driven Compressor for Engine Forced Induction
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Solution Overview
Problem
Turbochargers in engines are limited by their reliance on exhaust energy, leading to lag and restricted airflow, which hampers engine efficiency and output due to their turbine-driven mechanism.
Innovation Solution
An electric motor-driven compressor system that forces air into the combustion chamber, independent of the engine's exhaust, providing controlled and constant airflow by using a controller to manage the electric motor's operation and air flow, potentially eliminating the need for a turbocharger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a turbocharger is used to force air into the combustion chamber, then the amount of air and fuel increases, but the system suffers from lag and limited speed due to reliance on exhaust energy
Solution Approach 1:
The patent replaces the turbine-driven mechanical system with an electric motor-driven compressor system. The electric motor is directly coupled to the compressor, eliminating the need for a turbine and exhaust energy dependency. This substitution allows the compressor to operate independently of exhaust flow, thereby eliminating turbocharger lag and providing immediate air delivery to the combustion chamber.
Solution Approach 2:
The patent introduces an electric motor as an intermediary between the power source and the compressor. This intermediary decouples the compressor operation from the exhaust system, allowing the compressor to be driven by electrical energy rather than exhaust gas energy. The electric motor acts as a mediator that transforms electrical energy into mechanical energy to drive the compressor, resolving the lag issue.
2Quantity of substance
If a turbocharger is used to increase airflow, then more air enters the combustion chamber, but the speed of the turbocharger is limited by engine operation
Solution Approach 1:
The patent substitutes the exhaust-driven turbine mechanism with an electric motor-driven compressor. The electric motor can be controlled to operate at any speed within its operational range, independent of engine speed or exhaust flow. This allows the compressor to deliver airflow at optimal rates regardless of the engine's operational state, eliminating the speed limitations inherent in turbocharger systems.
Solution Approach 2:
The patent changes the driving parameter from exhaust gas energy to electrical energy. By using an electric motor, the system can independently control rotational speed and airflow delivery based on electrical power availability rather than being constrained by exhaust flow characteristics. This parameter change enables precise control of compressor speed and airflow 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
This solution enhances engine efficiency and output by ensuring consistent airflow and reducing lag, as the electric motor can operate independently of the engine's exhaust energy, allowing for improved torque and power delivery across various engine speeds.
Implementation Method 1
an electric motor (203) that is mechanically linked to drive a compressor (201)
Data Source
AI summary
A generator system may include a compressor and an electric motor. The compressor includes an impeller, and the compressor provides a quantity of air flowing toward an intake of an engine through rotation of the impeller. The electric motor is mechanically linked to the compressor and rotates the impeller to force the quantity of air flowing toward the intake of the engine. The generator system may include a charge air cooler to receive the quantity of air flowing toward the intake of the engine and increase an air charge density of the quantity of air. The generator system may include an exhaust portion to expel exhaust from the engine such that the quantity of air provided by the compressor does not include exhaust expelled by the exhaust portion. The generator system may include an air valve configured to regulate the quantity of air flowing toward the intake of the engine.