Engine Fuel Injection Timing Control for Emission Reduction
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Solution Overview
Problem
Existing internal combustion engines face challenges in limiting emissions and increasing fuel efficiency without operating outside mechanical limits, leading to component degradation and increased fuel costs.
Innovation Solution
The implementation of a common rail fuel system, advanced intake valve closing timing, and a turbocharger with an increased compressor map width, which together optimize fuel injection timing and pressure to reduce emissions and enhance engine efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the engine operates to limit emissions and increase fuel efficiency, then emissions are reduced and fuel efficiency is improved, but the engine operates outside hardware limits causing component degradation and reduced lifetime
Solution Approach 1:
The fuel injection timing is dynamically adjusted based on engine output demand, varying the amount of advance in a non-monotonic manner (decreasing then increasing as output demand increases) to optimize combustion characteristics across different operating conditions, allowing emission reduction without excessive component stress
Solution Approach 2:
The system changes the fuel injection timing parameter in response to engine output demand, optimizing the balance between emission reduction and component protection by adjusting injection advance angles to prevent operation outside hardware limits while still achieving emission benefits
2Object-generated harmful factors
If the engine operates to limit emissions and increase fuel efficiency, then emissions are reduced and fuel efficiency is improved, but total fuel cost increases due to reduced fuel efficiency in conventional operation
Solution Approach 1:
The fuel injection timing is dynamically optimized across the engine operating range, with the amount of advance decreasing then increasing as engine output demand increases, achieving superior fuel efficiency at all operating points compared to conventional fixed-timing engines
Solution Approach 2:
By continuously adjusting the fuel injection timing parameter based on engine output demand, the system achieves optimal combustion efficiency across all operating conditions, resulting in lower total fuel consumption and reduced fuel costs despite the complexity of the control strategy
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 combination reduces vehicle emissions and increases fuel efficiency, maintaining engine performance while minimizing component degradation and fuel consumption, thus meeting environmental regulations and reducing operational costs.
Implementation Method 1
a common rail fuel injection system, the common rail fuel injection system including a plurality of fuel injectors
Implementation Method 2
an internal combustion engine
Data Source
AI summary
Various systems and methods are provided for adjusting operating parameters of an internal combustion engine. In one example, a system may include adjusting an amount of advance of a fuel injection timing of a plurality of fuel injectors of an internal combustion engine relative to top dead center (TDC) responsive to engine output demand, where, as the engine output demand increases, the amount of advance first decreases and then increases. In this way, an amount of vehicle emissions may be decreased while an amount of fuel consumption is decreased.