Gas Fuel Temperature Control for Low-Load Engine Injection
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Solution Overview
Problem
Existing engine systems face challenges in accurately controlling gas fuel injection amounts in low load regions and suppressing fuel diffusion, particularly due to limitations in valve opening periods and fuel flow rate adjustment units.
Innovation Solution
A fuel supply device with a gas fuel adjustment unit, temperature adjustment unit, and pressure adjustment device, controlled by a control device, to finely manage gas fuel supply volume, pressure, and temperature based on operation state and environment, using heat exchange units and flow rate adjustment units to enhance control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the valve opening period of the gas fuel supply valve is adjusted to control engine output, then the engine output can be controlled, but the minimum injection period is restricted by the valve which prevents accurate control in low load region
Solution Approach 1:
The patent changes the temperature parameter of the gas fuel to control the injection amount. By adjusting the temperature of the gas fuel supplied to the combustion chamber, the system can precisely control the injection amount without being limited by the minimum valve opening period, thereby enabling accurate engine output control in low load regions.
2Power
If the gas fuel flow rate is increased to meet higher engine output demands, then the engine power increases, but the gas fuel diffusion and leakage from components worsens
Solution Approach 1:
The patent utilizes temperature as a control parameter to manage gas fuel properties. By controlling the temperature of the gas fuel, the system can optimize the balance between delivering sufficient fuel for high power output and minimizing fuel diffusion and leakage, thereby reducing harmful effects while maintaining engine performance.
3Manufacturing precision
If the gas fuel temperature is not controlled, then the system structure is simpler, but the supply volume control precision and diffusion suppression are insufficient
Solution Approach 1:
The patent introduces temperature as a control parameter to achieve precise supply volume control. By implementing temperature control of the gas fuel, the system gains the ability to precisely regulate injection amounts and suppress diffusion, with the added benefit of potentially simplifying other control mechanisms.
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
Enables precise engine output control and reduces gas fuel diffusion by adjusting temperature and pressure of the fuel supply, allowing for stable operation across varying load conditions.
Implementation Method 1
The temperature adjustment unit includes a heat exchange unit that allows a heat exchange medium to flow therethrough and act on the gas fuel
Implementation Method 2
a flow rate adjustment unit that adjusts a flow rate of the heat exchange medium
Implementation Method 3
a pressure adjustment device that adjusts supply pressure of the gas fuel
Data Source
AI summary
A fuel supply device that supplies at least a gas fuel to a predetermined supply target such as an engine includes: a gas fuel supply unit as a gas fuel adjustment unit that adjusts a supply volume of the gas fuel and supplies the gas fuel to the supply target; a pressure adjustment device that adjusts supply pressure of the gas fuel; and a temperature adjustment unit that is disposed between the pressure adjustment device and the gas fuel supply unit in a supply direction of the gas fuel and adjusts, in accordance with an operation state and/or an operation environment of the supply target, a temperature of the gas fuel supplied to the gas fuel supply unit. The pressure adjustment device and the temperature adjustment unit are accommodated in a common housing.