Automatic Water-Fuel Separator Draining via Exhaust Injection
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Solution Overview
Problem
In diesel engine systems, failure to regularly drain the water from the water-fuel separator can result in water reaching the engine, causing damage, and existing solutions rely on manual maintenance which is inefficient.
Innovation Solution
An automatic system is integrated where the downstream injection system connects the water-fuel separator's reservoir directly to the exhaust system, allowing the fuel injector to draw from the reservoir and inject the water-fuel mixture into the exhaust, thereby automatically draining the water during normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual draining of the reservoir is used, then the water can be removed, but maintenance efficiency is low and reliability is reduced
Solution Approach 1:
The system uses the engine's own exhaust system and fuel injector to automatically drain water from the reservoir without requiring manual intervention. The fuel injector draws water-fuel mixture from the reservoir and injects it into the exhaust system, where the water is separated and drained automatically during normal engine operation.
Solution Approach 2:
The exhaust system acts as an intermediary medium to remove water from the reservoir. By injecting the water-fuel mixture into the exhaust system, the water is separated from the fuel and removed through the exhaust gases, eliminating the need for direct manual draining.
2Loss of time
If the reservoir is not drained manually, then maintenance time is saved, but water may reach the engine causing damage
Solution Approach 1:
The system performs preliminary action by continuously draining water from the reservoir during normal engine operation before water can accumulate to harmful levels. The automatic draining mechanism ensures water is removed proactively rather than reactively after damage occurs.
Solution Approach 2:
The system operates with feedback control where the engine control unit monitors reservoir water levels and activates the draining function when water exceeds a threshold level. This feedback mechanism ensures water is removed automatically based on actual water accumulation conditions.
3Extent of automation
If automatic draining via exhaust injection is implemented, then maintenance efficiency improves and reliability increases, but device complexity increases
Solution Approach 1:
The fuel injector is given a dual function: it not only injects fuel into the combustion chamber but also draws water-fuel mixture from the reservoir and injects it into the exhaust system for water removal. This multi-functionality eliminates the need for separate draining equipment while achieving automatic draining capability.
Solution Approach 2:
The system merges the water draining function with the existing exhaust injection system. By combining the fuel injection function with water removal, the patent integrates multiple functions into a single system component, reducing overall system complexity despite adding automation capability.
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 ensures that the water level in the reservoir remains below a threshold, preventing engine damage and eliminating the need for manual maintenance by continuously draining the water-fuel mixture into the exhaust system.
Implementation Method 1
A fuel injector (80) is connected to the exhaust pipe (44) and is configured to draw from the reservoir (74) and inject the water-fuel mixture into the exhaust system
Data Source
AI summary
A diesel engine system includes an engine, an exhaust system connected to the engine, and a water-fuel separator. The exhaust system has an aftertreatment device, an exhaust pipe upstream of the aftertreatment device, and a fuel injector connected to the exhaust pipe. The water-fuel separator has a filter configured to separate water from fuel and a reservoir configured to store the separated water. The reservoir is in fluid communication with the fuel injector.