Fuel-Coolant Mixing Device with Aligned Jets
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Solution Overview
Problem
Existing mixing devices for fuel injection systems in internal combustion engines do not achieve highly effective and stable mixing of fuel and coolant, which is crucial for efficient combustion.
Innovation Solution
A mixing device is designed with fuel and coolant jets aligned partially in the same direction, and arranged at an acute angle, with the coolant pressure higher than fuel pressure, to enhance mixing efficiency and stability, utilizing multiple coolant connections and a specific geometry of the mixing chamber to achieve a stable emulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fuel and coolant jets are completely aligned in the same direction, then mixing stability is improved, but mixing effectiveness deteriorates due to lack of swirling motion
Solution Approach 1:
The patent applies partial alignment of fuel and coolant jets rather than complete alignment. The jets are arranged at an acute angle (not perfectly parallel) to generate both the stability from directional alignment and the swirling motion from the angle component, achieving a balance between mixing stability and mixing effectiveness.
2Productivity
If coolant pressure is increased to improve atomization, then mixing effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent performs preliminary atomization of the coolant by increasing its pressure before the mixing process. This preliminary action prepares the coolant in an optimized state for mixing, improving the overall mixing effectiveness while allowing the system to operate more efficiently at lower subsequent pressures.
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 results in highly effective and stable mixing of fuel and coolant, improving combustion efficiency and maintaining stability across varying engine loads and rotational speeds.
Implementation Method 1
a fuel jet of the fuel and a coolant jet of the coolant are formed to align partially in the same direction to bring about efficient mixing of the fuel and the coolant before a collision of the fuel jet and the coolant jet of the coolant
Implementation Method 2
the fact that no complete unidirectional alignment direction is formed means that, owing to the jet components formed perpendicular to the unidirectional alignment direction, swirling is generated and brings about improved mixing
Data Source
AI summary
A fuel injection system (4) for an internal combustion engine has a low-pressure pump for delivering fuel from a fuel tank. The fuel is fed upstream of an injector (11) of the fuel injection system (4) to a mixing device (14). The mixing device (14) has a mixer housing (18) with a fuel connection (15) for receiving fuel and with at least one coolant connection (17; 28; 33) for receiving a coolant. For the purpose of bringing about efficient mixing of the fuel and the coolant, before a collision of a fuel jet (40) of the fuel and a coolant jet (41) of the coolant, the two fluid jets (40, 41) are formed to be at least partially aligned in the same direction.