Dual Injector Combustion System for Lean-Burn Engine Emissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internal combustion engines face inefficiencies in fuel burn due to short combustion times and inadequate air-fuel mixtures, leading to higher emissions of pollutants like hydrocarbons, carbon monoxide, and carbon dioxide, as existing injection systems fail to effectively flush out unburned fuel from the exhaust.
Innovation Solution
The implementation of both intake and exhaust injectors within the engine, using oxidizing fluids like fresh air, oxygen, or water to create a lean-burn mixture and ensure complete fuel combustion, with the exhaust injectors targeting the exhaust manifold to oxidize unburned fuel and reduce emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If traditional injection systems are used, then the engine structure remains simple, but fuel burn is incomplete and emissions are high
Solution Approach 1:
The injection system is segmented into multiple independent injectors positioned at different locations (intake port, combustion chamber, exhaust port) to address different aspects of fuel combustion and emission control separately, allowing complete fuel oxidation without requiring a single complex injection system
Solution Approach 2:
Oxidizing fluid is injected into the exhaust port after combustion to continue oxidizing unburned fuel in the exhaust gases, performing the oxidation action after the main combustion event to reduce emissions without interfering with the primary combustion process
2Object-generated harmful factors
If more oxidizing fluid is injected to improve fuel burn, then emissions are reduced, but the device complexity increases
Solution Approach 1:
The oxidizing fluid injection system serves multiple functions: improving combustion efficiency in the combustion chamber and reducing emissions in the exhaust port, allowing a single system design to address both performance and environmental concerns simultaneously
3Power
If fuel injection is increased to improve combustion, then power output increases, but burn time becomes insufficient at high RPM
Solution Approach 1:
The oxidizing fluid injection continues throughout the exhaust stroke, providing continuous oxidation of unburned fuel after the main combustion event, effectively extending the useful combustion action beyond the traditional combustion stroke to compensate for short burn times at high RPM
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, extends engine life, and significantly reduces emissions by ensuring a more complete fuel burn and continuous oxidation of unburned fuel within the exhaust system, resulting in cleaner exhaust gases.
Implementation Method 1
injecting a fluid into the combustion chamber... using oxidizing fluids like fresh air, oxygen, or water to create a lean-burn mixture and ensure complete fuel combustion
Implementation Method 2
exhaust injectors targeting the exhaust manifold to oxidize unburned fuel and reduce emissions
Data Source
AI summary
The present invention provides, in an internal combustion engine of the type including: a combustion cylinder having a combustion chamber; an intake port in fluid communication with the combustion chamber; an intake valve for opening and closing the intake port; an exhaust port in fluid communication with the combustion chamber; and an exhaust valve for opening and closing the exhaust portion; the improvement comprising: (a) at least one intake injector disposed within the intake port for injecting a fluid into the combustion chamber; (b) at least one exhaust injector disposed within the exhaust port for injecting a fluid toward the exhaust valve; and (c) means for controlling the at least one intake injector and the at least one exhaust injector.