Dual-Fuel Engine Control System with Feedback Injection
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Solution Overview
Problem
Existing dual-fuel engine control systems, such as those relying solely on feed-forward control, fail to account for variations in environmental and aging factors, leading to suboptimal performance.
Innovation Solution
A control system for dual-fuel engines that includes a gaseous fuel injector, a liquid fuel injector, a regulator, and sensors to adjust fuel flow based on engine load and speed, with a controller that uses feedback from sensors to optimize gaseous fuel injection and maintain desired performance parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If feed-forward control is used to control gas flow parameters, then the control system is simple, but it cannot account for variations in environmental factors and aging factors
Solution Approach 1:
The patent introduces a feedback control mechanism where a sensor detects engine performance parameters (such as exhaust temperature or pressure) and feeds this information back to a controller. The controller then adjusts the gas admission valve to optimize fuel injection parameters, enabling the system to adapt to environmental variations and aging effects while maintaining controlled complexity through electronic control.
2Ease of manufacture
If gaseous fuel is injected through air intake ports, then cost efficiency is improved by using low-cost fuel, but precise control of injection parameters becomes more difficult
Solution Approach 1:
The patent replaces mechanical injection control systems with an electronically controlled gas admission valve that receives signals from a controller. This electronic control system enables precise adjustment of gas flow parameters (timing, duration, quantity) while maintaining the cost advantage of using gaseous fuel through the air intake ports, thereby achieving both cost efficiency and injection precision.
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
The system ensures efficient and adaptive fuel injection, improving engine performance by adjusting fuel flow in response to real-time engine conditions, thereby enhancing cost efficiency and reducing emissions.
Implementation Method 1
a gaseous fuel injector having a nozzle located at a first air intake port of a cylinder of the engine and configured to inject a variable amount of gaseous fuel radially into the cylinder
Implementation Method 2
a liquid fuel injector configured to inject a fixed amount of liquid fuel axially into the cylinder
Implementation Method 3
a regulator configured to selectively adjust a flow of gaseous fuel to the gaseous fuel injector
Implementation Method 4
at least one sensor configured to generate a signal indicative of a performance parameter of the engine
Implementation Method 5
a controller in communication with the regulator and the at least one sensor. The controller may be configured to selectively cause the regulator to adjust the flow of gaseous fuel based on the signal
Data Source
AI summary
A control system for a dual-fuel engine is disclosed. The control system may have a gaseous fuel injector having a nozzle located at a first air intake port of a cylinder of the engine and configured to inject a variable amount of gaseous fuel radially into the cylinder based on at least one of a load and speed of the engine. The control system may also have a liquid fuel injector configured to inject a fixed amount of liquid fuel axially into the cylinder based on the at least one of the load and speed of the engine. The control system may additionally have a regulator configured to selectively adjust a flow of gaseous fuel to the gaseous fuel injector and at least one sensor configured to generate a signal indicative of a performance parameter of the engine. The control system may also have a controller in communication with the regulator and the at least one sensor. The controller may be configured to selectively cause the regulator to adjust the flow of gaseous fuel based on the signal.