Diesel Engine Cleaning Agent Ignition Control

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Solution Overview

Problem

Diesel engines with long use periods and high travel distances often fail to meet emission standards due to incomplete fuel combustion, leading to excessive black smoke emissions, and existing cleaning methods are ineffective in removing carbon and sludge deposits without causing diesel knock or requiring dismantling.

Innovation Solution

A cleaning agent comprising a solvent with an ignition point of 238°C or more and a lubricating grease is sprayed into the intake system, forming a mixed solution that ignites at a higher temperature than light oil, preventing knocking and effectively removing carbon and sludge deposits by penetrating and weakening their bonding with the engine surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cleaning agent is used to remove carbon and sludge deposits from the diesel engine, then the cleaning effect is improved, but diesel knock may occur due to the cleaning agent self-igniting in the compression stroke

Engineering Contradiction:

Improvecleaning effectVSAvoiddiesel knock

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the physical and chemical parameters of the cleaning agent by selecting solvents with specific flash points (above 60°C) and blending ratios (5-50% by volume), thereby adjusting the ignition characteristics to prevent self-ignition during compression while maintaining cleaning effectiveness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite material formulation by blending multiple solvents (such as ketones, esters, ethers, or hydrocarbons) with grease in specific proportions, creating a mixed solution that combines cleaning power with controlled ignition properties to avoid diesel knock

Inventive Principle:

Principle #40Composite materials

2Reliability

If the diesel engine is dismantled for thorough cleaning, then the cleaning effectiveness is improved, but the complexity and labor cost increase

Engineering Contradiction:

Improvecleaning effectivenessVSAvoiddismantling process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent enables the diesel engine to clean itself by injecting the cleaning agent through the existing fuel injection system, allowing the engine's own operation to distribute and activate the cleaning agent throughout the combustion chamber, intake manifold, and exhaust system without external intervention or dismantling

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent makes the fuel injection system perform multiple functions by using it not only for fuel delivery but also for cleaning agent injection, thereby utilizing the existing infrastructure to achieve both fueling and cleaning objectives without additional complex equipment

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If conventional cleaning agents are used, then carbon deposits are removed, but black smoke emissions increase due to incomplete combustion

Engineering Contradiction:

Improvedeposit removalVSAvoidblack smoke emissions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent modifies the combustion parameters by using cleaning agents with controlled ignition temperatures and blending ratios, ensuring that the cleaning agent burns completely along with the fuel without leaving unburned residues that would cause black smoke emissions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent promotes complete combustion by using oxygenated solvents (such as esters, ethers, and ketones) that contain oxygen atoms, which facilitate more thorough oxidation of carbon deposits and reduce incomplete combustion products like black smoke

Inventive Principle:

Principle #38Strong oxidants (Accelerated oxidation)

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 allows for efficient cleaning of diesel engines without knocking, reduces black smoke emissions, and improves fuel efficiency, while minimizing environmental impact and labor costs by avoiding the need for engine dismantling.

Implementation Method 1

penetrating and weakening their bonding with the engine surfaces

Methodology Applied

Scientific EffectPenetration: Permeation

Implementation Method 2

cleaning agent including a mixed solution in which a solvent and a grease are blended

Methodology Applied

Scientific EffectChemical cleaning: Solvation

Implementation Method 3

ignites at a higher temperature than light oil, preventing knocking

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 4

ignition point of 238°C or more

Methodology Applied

Scientific EffectIgnition:

Data Source

PatentUS9617505B2Internal cleaning agent for diesel engine and cleaning system using the same

Publication Date: 2017.04.11 O2 ENG LTD

AI summary

The cleaning agent for a diesel engine includes a mixed solution obtained by blending a solvent that exhibits solubility and has an ignition point of 238° C. or more, and lubricating oil such as mineral oil in a predetermined ratio. The solvent and the grease are selected such that the cleaning agent has a higher ignition temperature characteristic than the ignition characteristic of light oil, and an evaporation characteristic that takes eight minutes or more to vaporize 2.5 cc of the cleaning agent in a heated state at 120° C.