Hydrogen Engine Combustion Pressure Control Against Oil Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internal combustion engines using hydrogen fuel face challenges with low pressure injection, leading to longer injection durations and increased risk of oil residuals leaking into the combustion chamber, potentially causing particle emissions.
Innovation Solution
An internal combustion engine arrangement with a combustion chamber pressure controller that maintains a higher pressure level in the combustion chamber compared to the crankcase, reducing the risk of oil residuals leaking into the combustion chamber and minimizing particle emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If low pressure injection is used for hydrogen fuel, then fuel injection is achieved, but injection duration is longer and oil residuals can leak into combustion chamber causing particle emissions
Solution Approach 1:
The patent changes the pressure parameter in the combustion chamber by introducing a pressure control system that maintains positive pressure differential between combustion chamber and crankcase. This prevents oil residuals from leaking into the combustion chamber during the extended injection duration, thereby reducing particle emissions without requiring shorter injection time
2Object-affected harmful factors
If low pressure injection is used for hydrogen fuel, then fuel injection is achieved, but oil residuals leak into combustion chamber
Solution Approach 1:
The patent introduces a pressure control system that actively maintains positive pressure in the combustion chamber relative to the crankcase. This pressure differential barrier prevents oil residuals from the crankcase from leaking into the combustion chamber, thereby protecting combustion chamber integrity during low pressure hydrogen injection operation
Solution Approach 2:
The pressure control system acts as an intermediary barrier between the crankcase and combustion chamber. By controlling the pressure differential, it mediates the interaction between these two spaces, preventing direct contamination from oil residuals while allowing the low pressure injection process to continue
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 solution effectively reduces particle emissions by preventing oil residuals from entering the combustion chamber, resulting in a more environmentally friendly engine arrangement.
Implementation Method 1
maintain a higher pressure level in the combustion chamber compared to the crankcase, reducing the risk of oil residuals leaking into the combustion chamber
Data Source
AI summary
The present disclosure relates to an internal combustion engine arrangement comprising an internal combustion engine comprising a reciprocating piston connected to a crankshaft arranged in a crankcase, and a combustion chamber, wherein the crankcase and the combustion chamber are arranged on a respective side, in a reciprocating direction, of the reciprocating piston, a combustion chamber pressure controller arranged in fluid communication with the combustion chamber and configured to control a pressure level in the combustion chamber, and a control unit comprising processing circuitry configured to determine a pressure level in the combustion chamber, determine a pressure level in the crankcase, and control the combustion chamber pressure controller in response to a difference between the pressure level in the combustion chamber and the pressure level in the crankcase being below a predetermined threshold limit.