Internal Combustion Engine Water Fuel Injection Axis Intersection
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Solution Overview
Problem
Existing internal combustion engines do not effectively account for the atomization of water following its injection, which limits the efficiency of temperature reduction in intake air due to heat of vaporization.
Innovation Solution
The internal combustion engine design includes a water injection valve and a fuel injection valve, where the water axis and fuel axis intersect within the cylinder, causing the injected water to collide with gaseous fuel and further atomize the water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water is injected into the cylinder to cool intake air through heat of vaporization, then the temperature of intake air decreases, but the atomization of water is insufficient and cooling efficiency is limited
Solution Approach 1:
Gaseous fuel serves as an intermediary medium to enhance water atomization. The fuel injection valve injects gaseous fuel into the cylinder, and the water injection valve injects water that collides with the gaseous fuel. This collision utilizes the gaseous fuel as a mediator to break up water droplets into finer particles, significantly improving atomization and subsequent evaporation efficiency, thereby enhancing cooling performance.
2Productivity
If water injection valve injects water alone, then water vaporization occurs, but the atomization is not sufficient to maximize cooling effect
Solution Approach 1:
The invention merges the water injection system with the fuel injection system. The water injection valve and fuel injection valve are positioned such that their injection axes intersect within the cylinder. This merging of two injection systems allows water droplets to collide with gaseous fuel during injection, naturally atomizing the water into finer and more uniformly distributed particles without requiring additional atomization devices.
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 configuration enhances the atomization of water, leading to improved mixing with intake air and more efficient cooling, thereby optimizing engine performance.
Implementation Method 1
most of the water injected from the water injection valve collides with the gaseous fuel injected from the fuel injection valve. When the water collides with the gaseous fuel, the particle size of the water decreases.
Implementation Method 2
the finer the water injected from the water injection valves, the more easily the injected water vaporizes. That is, as the injected water becomes finer, the temperature of intake air flowing into the cylinders decreases due to the heat of vaporization.
Implementation Method 3
the temperature of intake air flowing into the cylinders decreases due to the heat of vaporization
Data Source
AI summary
An internal combustion engine and a controller for the internal combustion engine are provided. A water axis is an injection axis of water from a water injection valve. A fuel axis is an injection axis of gaseous fuel from a fuel injection valve. The internal combustion engine has a specific cross-section that is a plane. The specific cross-section is parallel to a cylinder central axis. The specific cross-section includes a water valve tip and a fuel valve tip. In the specific cross-section, the water axis and the fuel axis intersect each other in the cylinder.