Fuel Heating After High-Pressure Pump for Lower-Pressure DI Injection
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Solution Overview
Problem
Existing direct injection (DI) systems in internal combustion engines face challenges in maintaining durability and reducing emissions while operating at high pressures, leading to increased fuel consumption and particulate emissions.
Innovation Solution
A system and method for managing fuel temperature by heating it downstream of the high-pressure pump, using a fuel heater positioned after the pump to maintain internal component durability and reduce emissions through improved atomization and homogeneous mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fuel injection pressure is increased to reduce pollutant emissions, then emission reduction is improved, but component durability and fuel consumption are worsened
Solution Approach 1:
The patent changes the temperature parameter of the fuel by introducing a heating system. The fuel is heated before injection, which modifies its physical properties (viscosity, atomization characteristics) to achieve better combustion and emission reduction at lower injection pressures (200 BAR vs. 750 BAR), thereby resolving the contradiction between emission reduction and component durability
Solution Approach 2:
The fuel is heated in advance before being injected into the engine. This preliminary heating action prepares the fuel for more efficient combustion, allowing the system to achieve good emission reduction results without requiring extremely high injection pressures that would compromise component durability
2Object-generated harmful factors
If fuel injection pressure is increased to reduce pollutant emissions, then emission reduction is improved, but fuel consumption is worsened
Solution Approach 1:
By changing the fuel temperature parameter through heating, the system achieves better combustion efficiency at lower injection pressures, reducing the energy required for injection while maintaining or improving emission reduction performance
Solution Approach 2:
The patent partially replaces the mechanical approach of using high injection pressure to achieve good combustion with a thermal approach (fuel heating). This substitution reduces the mechanical energy requirements and associated fuel consumption while maintaining emission reduction effectiveness
3Object-generated harmful factors
If fuel injection pressure is increased to reduce pollutant emissions, then emission reduction is improved, but system complexity and cost are worsened
Solution Approach 1:
The patent uses parameter change (fuel temperature) as an alternative to increasing injection pressure, thereby avoiding the need for extremely high-pressure injection systems and their associated complexity and cost
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 efficient operation at lower pressures (200 BAR) with results comparable to higher pressures (750 BAR), preserving component durability and reducing emissions by improving fuel atomization and mixture homogeneity.
Implementation Method 1
a fuel heater positioned downstream of the high-pressure pump, which heats the fuel to a target temperature before injection
Data Source
AI summary
The present invention relates to a system and method for managing the temperature of fuel injected into internal combustion engines from a mixture of an air flow and fuel applicable to a vehicle that uses an injection system with high pressures.