Electrified Air-Boost System for Engine Stall Prevention
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Solution Overview
Problem
Internal combustion engines in work vehicles face challenges in responding to sudden load increases, particularly at low speeds, leading to potential stalling, which can cause engine damage and productivity delays.
Innovation Solution
An engine system with electrified components, including an energy storage device and an electrified air-boost system powered by electrical power, uses a controller to monitor engine speed and load, activating the air-boost system or motor-generator unit to temporarily boost torque output and prevent stalling during impending engine stall conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine operates at low speeds, then fuel consumption is reduced and emissions are lowered, but the engine cannot respond quickly to sudden load increases, resulting in potential stalling
Solution Approach 1:
The controller proactively monitors engine operating conditions and identifies impending stall conditions before they occur. When a stall is anticipated, the controller activates the electrified air-boost system in advance to provide supplemental air, ensuring the engine maintains sufficient torque to handle sudden load increases without stalling.
Solution Approach 2:
The electrified air-boost system acts as an intermediary between the engine and the load. It provides a buffer by delivering supplemental air to the engine intake, enabling the engine to maintain torque output during transient high-load conditions that would otherwise cause stalling at low speeds.
2Productivity
If the engine increases torque output quickly to handle sudden load increases, then productivity is maintained, but engine wear increases and component damage may occur
Solution Approach 1:
The electrified air-boost system operates periodically rather than continuously. It activates only during transient high-load conditions when stalling is anticipated, providing supplemental air in brief intervals. This periodic operation allows the engine to maintain productivity during critical moments while avoiding continuous high-stress conditions that would accelerate component wear.
Solution Approach 2:
The system dynamically changes operating parameters by adjusting the level of air boosting based on real-time engine conditions. The controller modulates the air-boost system's output to provide just enough supplemental air to prevent stalling, rather than continuously maximizing torque, thereby maintaining productivity while limiting mechanical stress on engine components.
3Reliability
If the electrified air-boost system operates continuously to prevent stalling, then engine reliability is improved, but energy consumption increases
Solution Approach 1:
The air-boost system's operation is made dynamic rather than static. The controller continuously adjusts the system's activation based on real-time monitoring of engine speed and load conditions. The system activates only when and where needed to prevent stalling, and deactivates when conditions allow normal engine operation, optimizing the balance between reliability and energy consumption.
Solution Approach 2:
The controller receives feedback from sensors monitoring engine speed and load conditions, and adjusts the air-boost system's operation accordingly. This closed-loop control ensures the system provides supplemental air only when stall conditions are detected or anticipated, preventing unnecessary energy consumption while maintaining engine reliability during critical operating windows.
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 mitigates engine stalling at low speeds by increasing torque output, enhancing engine longevity and productivity by selectively operating in a 'blast mode' to manage sudden load changes.
Implementation Method 1
an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the internal combustion engine
Data Source
AI summary
An engine system includes an internal combustion engine, an energy storage device configured to provide electrical power, and an electrified air-boost system powered by the electrical power from the energy storage device to boost intake air to the engine, with the electrified air-boost system further including an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the engine. The engine system also includes a controller operably connected with the electrified air-boost system, with the controller configured to monitor engine speed and engine load during operation of the engine, identify an impending engine stall condition based on the monitored engine speed and engine load, and when the impending engine stall condition is identified, temporarily operate the electrified air-boost system to boost the intake air to the engine, thereby boosting a torque output of the engine.