Pre-Chamber Coolant Blending for Temperature Control
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Solution Overview
Problem
Pre-chamber combustion systems face issues such as residual burned gases diluting the air/fuel mixture, decreased combustion efficiency, increased emissions, and limited temperature control due to reliance on a single coolant circuit, which affects tip erosion, coking, and combustion stability.
Innovation Solution
A pre-chamber configured to receive a blended coolant flow from two separate coolant circuits, with a blending valve adjusting the mixture to achieve a desired temperature, enhancing temperature control and preventing issues like coking and pre-chamber knock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coolant circuit is used for pre-chamber cooling, then the system complexity is reduced, but the temperature control capability deteriorates
Solution Approach 1:
The coolant system is segmented into multiple independent circuits (first coolant circuit and second coolant circuit), each capable of providing different temperature levels. This segmentation allows selective combination of coolant flows to achieve precise temperature control in the pre-chamber without excessive system complexity.
Solution Approach 2:
The system dynamically adjusts the mixing ratio of coolants from different temperature circuits based on real-time operating conditions. The blending valve dynamically controls the proportion of hot and cold coolant flows to maintain optimal pre-chamber temperature across varying engine loads and ambient conditions.
2Measurement precision
If coolant mixing is implemented to improve temperature control, then the temperature precision is improved, but the device complexity increases
Solution Approach 1:
The coolant control system is segmented into modular components: separate coolant circuits, individual control valves for each circuit, and a blending section. This modular segmentation enables precise temperature control while keeping each component relatively simple and maintainable.
3Productivity
If pre-chamber temperature is increased to improve combustion efficiency, then the combustion efficiency is improved, but harmful effects increase
Solution Approach 1:
The system changes the temperature parameter of the coolant flowing to the pre-chamber based on operating conditions. By adjusting coolant temperature rather than maintaining a fixed temperature, the system can optimize combustion efficiency while preventing harmful effects like coking and tip erosion that occur at excessively high temperatures.
Solution Approach 2:
The coolant temperature supplied to the pre-chamber is dynamically adjusted based on real-time monitoring of combustion conditions, piston temperature, and ambient conditions. This dynamic adjustment allows the system to maintain optimal combustion efficiency while preventing temperature-related harmful effects.
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 improves combustion efficiency, reduces emissions, and stabilizes pre-chamber temperatures, leading to increased power output and better engine performance.
Implementation Method 1
The coolants may be mixed via a coolant blending valve configured to blend a desired amount of each of the coolants to obtain a desired coolant temperature
Implementation Method 2
a pre-chamber configured to combust fuel and air outside of a primary combustion chamber
Implementation Method 3
the pre-chamber is configured to receive a blended coolant flow comprising coolant from two separate coolant circuits
Data Source
AI summary
Methods and systems are provided for a pre-chamber. In one example, a system comprises flowing a mixture of coolants to a coolant chamber of the pre-chamber. Additionally or alternatively, only one coolant may be directed to the coolant chamber during some conditions.