Ram Hammer Fuel Injection and Ignition Control
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Solution Overview
Problem
Diesel hammers face inefficiencies in fuel combustion and residue formation due to their inability to adapt to varying soil conditions, leading to incomplete combustion and operational challenges such as overheating and complex maintenance.
Innovation Solution
A piling hammer system utilizing a primary fuel with high knock resistance and an ignition oil supply, where the primary fuel is introduced as an atomized mist and ignited by self-igniting ignition oil at the optimal time, ensuring a homogeneous fuel-air mixture and minimizing combustion residues, with nozzles designed for precise fuel distribution and controlled injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If high-pressure injection is used to improve combustion efficiency and reduce residues, then combustion quality improves, but the system becomes complex and prone to overheating and misfire
Solution Approach 1:
The patent extracts the ignition function from the complex high-pressure injection system by using a separate ignition element (spark plug or compression ignition device) that independently initiates combustion. This separates the fuel injection function from the ignition function, simplifying the overall system while maintaining combustion efficiency and reducing residues.
Solution Approach 2:
The patent introduces an intermediary ignition mechanism that mediates between the fuel injection system and the combustion process. This intermediary component ensures reliable ignition without requiring complex high-pressure injection systems, thereby reducing system complexity while maintaining combustion quality.
2Object-generated harmful factors
If high-pressure injection is used to improve combustion quality, then residue formation decreases, but the system becomes more sensitive to overheating and requires complex maintenance
Solution Approach 1:
The patent extracts the ignition function from the high-pressure injection system, using a separate ignition element that is less sensitive to temperature variations. This separation reduces the system's sensitivity to overheating while maintaining combustion quality and reducing residues.
Solution Approach 2:
The patent changes the ignition method from high-pressure injection-dependent ignition to a more temperature-resistant ignition mechanism. This parameter change in the ignition approach allows the system to maintain reliable operation under varying thermal conditions without compromising combustion quality.
3Force
If impact atomization is used to increase kinetic energy transfer to the hammer, then impact force increases, but combustion quality deteriorates and residues increase
Solution Approach 1:
The patent segments the fuel delivery process into two distinct stages: initial fuel injection followed by controlled ignition. This segmentation allows the system to achieve both high impact force (through controlled piston motion) and good combustion quality (through proper ignition timing and fuel distribution), preventing residue formation.
Solution Approach 2:
The patent applies preliminary fuel injection before the main compression stroke, allowing fuel to be properly distributed and pre-mixed with air. This preliminary action ensures that when ignition occurs, combustion is efficient and complete, reducing residues while still allowing the piston to build sufficient kinetic energy for high impact force.
4Ease of operation
If diesel oil is used as fuel to provide self-igniting capability, then starting behavior improves, but combustion completeness decreases and residues form
Solution Approach 1:
The patent introduces an intermediary ignition mechanism (spark plug or compression ignition device) that acts as a mediator between the fuel and air mixture and the combustion process. This intermediary ensures complete and controlled combustion, reducing residues while maintaining easy starting behavior through reliable ignition initiation.
Solution Approach 2:
The patent changes the ignition approach from relying solely on diesel oil's self-igniting properties to using a controlled ignition mechanism. This parameter change in the ignition method ensures more complete combustion and reduces residues while maintaining good starting behavior through reliable ignition initiation.
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 fuel combustion efficiency, reduces residue formation, and improves reliability by ensuring optimal ignition timing and homogeneous mixture formation, allowing the piling hammer to effectively operate across different soil conditions without overheating or maintenance issues.
Implementation Method 1
the primary fuel is introduced as an atomized mist
Implementation Method 2
The air in the combustion chamber of the cylinder is compressed by the falling piston
Implementation Method 3
The air in the combustion chamber of the cylinder is compressed by the falling piston and thereby heated to such an extent that the fuel/air mixture in the combustion chamber ignites
Implementation Method 4
the fuel/air mixture in the combustion chamber ignites, whereupon it burns explosively
Implementation Method 5
the piston is pulled up using a release device inside the cylinder and released at a certain height, causing it to fall under the influence of gravity onto the hammer
Implementation Method 6
the piston actuates a fuel pump, via which fuel, in particular diesel oil, is supplied via one or more injection nozzles
Data Source
Figure 1
AI summary
The invention relates to a ram hammer comprising a cylinder (1), a piston (2) slidably guided in the cylinder (1), a striking piece (3) slidably guided in the cylinder (1) which is arranged below the piston (2) in the operating position of the ram hammer, a combustion chamber (12) which is axially bounded by an end face (30) of the striking piece (3) located inside the cylinder (1) and an end face (21) of the piston (2), and at least one fuel supply device by which a predetermined quantity of fuel can be introduced into the combustion chamber (12) during each working cycle. A primary fuel supply device (4) is arranged, which comprises a primary fuel nozzle (42) designed as a high-pressure injection nozzle and connected to a primary fuel tank (45) containing a fuel with high knock resistance, and a pilot oil supply device (5) is arranged, which comprises a pilot oil tank containing pilot oil.The invention comprises a low-pressure injection nozzle (52). The invention further relates to a method for operating such a ram hammer.