Genset Coolant Valve Control for Stable Transient Temperatures
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Solution Overview
Problem
Existing genset coolant systems face issues with temperature oscillations and overshoots/undershoots due to delayed responses to load changes, leading to potential engine damage and inefficient performance.
Innovation Solution
A method and system for regulating genset coolant temperatures using control loops to determine a target inlet coolant temperature based on load conditions and outlet coolant temperature, adjusting coolant valve operations to stabilize engine temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional coolant control system is used, then the system structure is simple, but temperature oscillations and overshoots occur due to delayed response to load changes
Solution Approach 1:
The patent implements dynamic control modes (transient mode for load changes ≥4%, steady-state mode for stable loads) that adapt the control strategy based on operating conditions. The controller dynamically adjusts coolant valve operations using different algorithms depending on whether the genset is experiencing transient or steady-state conditions, enabling responsive temperature control without excessive complexity.
Solution Approach 2:
The system changes control parameters based on load conditions by switching between transient and steady-state control modes. During transient conditions, the system uses aggressive valve adjustment to quickly respond to load changes, while in steady-state conditions, it maintains stable temperatures with minimal adjustments, optimizing both responsiveness and stability.
2Reliability
If aggressive coolant control is applied to prevent temperature oscillations, then temperature stability improves, but fuel efficiency decreases due to suboptimal engine operating conditions
Solution Approach 1:
The control system dynamically adapts coolant valve operations based on transient or steady-state conditions. During transient load changes, aggressive control maintains temperature stability, while during steady-state operation, the system optimizes coolant flow to maintain ideal engine operating temperatures for maximum fuel efficiency and minimum NOx emissions.
Solution Approach 2:
The system applies periodic control adjustments based on load condition detection. When transient conditions are detected (load change ≥4%), the controller activates transient control mode with frequent valve adjustments. When steady-state conditions prevail, the system reduces control activity to maintain optimal temperatures without excessive interventions that would reduce fuel efficiency.
3Manufacturing precision
If multiple control modes are implemented to handle different load conditions, then temperature control precision improves, but device complexity increases
Solution Approach 1:
The controller dynamically switches between transient and steady-state control modes based on detected load conditions. The system monitors load changes and automatically selects the appropriate control strategy, providing precise temperature control adapted to operating conditions without requiring complex manual configuration or multiple physical control systems.
Solution Approach 2:
The control system segments the operating range into distinct modes (transient and steady-state) based on load change magnitude. Each mode has optimized control parameters and algorithms tailored to its specific conditions, allowing precise temperature control for each operating regime while keeping the overall control architecture manageable through clear segmentation.
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
Prevents temperature oscillations, improves engine performance and longevity, reduces NOx emissions, and enhances fuel efficiency by maintaining stable coolant temperatures during transient loads.
Implementation Method 1
a cooling substance can flow through the engine to reduce heat generated by the engine
Implementation Method 2
The heated substance may circulate from the engine through a heat exchanger... The heated substance may release the absorbed heat by flowing through the heat exchanger
Data Source
AI summary
Systems and methods for regulating an outlet coolant temperature of a genset and an inlet coolant temperature of the genset are provided. A load condition of the genset may be determined. An operating mode can be selected from between a first mode associated with a first load condition and a second mode associated with a second load condition responsive to determining the load condition of the genset. The first mode and the second mode may be configured to determine a target inlet coolant temperature using one or more control loops. The target inlet coolant temperature may be determined using the selected operating mode, a target outlet coolant temperature and the outlet coolant temperature. The outlet coolant temperature may be regulated based on the determined target inlet coolant temperature and the inlet coolant temperature by adjusting an operation of one or more coolant valves.