Integrally Cast Cylinder Head Inlet Valve Casing
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Solution Overview
Problem
Existing fuel supply pipe systems for gas or dual-fuel engines face challenges in precision manufacturing and high installation costs, particularly in housing fuel inlet valves, and lack effective leakage detection mechanisms.
Innovation Solution
A cylinder head with an integrally casted inlet valve casing that defines a leakage detection space between the inner surface and the fuel inlet valve, combined with a pressure monitoring system using inert gas and pressure sensors to detect leaks, allowing for precise localization of leakage points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate housing with multiple components is used to house the fuel inlet valve, then the valve can be properly housed and protected, but the manufacturing precision requirements increase and installation expenses rise
Solution Approach 1:
The inlet valve casing is integrally formed with the cylinder head main body through casting, merging two separate components into one unified structure. This eliminates the need for separate housing components and their associated precision manufacturing requirements, while maintaining the protective and housing functions for the fuel inlet valve
2Reliability
If a separate housing with multiple components is used to house the fuel inlet valve, then the valve can be properly housed, but installation expenses increase
Solution Approach 1:
The integral casting of the inlet valve casing with the cylinder head main body reduces the number of parts that need to be manufactured, assembled, and installed. This simplification directly reduces installation expenses while maintaining the necessary housing functionality
Solution Approach 2:
The cylinder head main body is designed to serve multiple functions: it provides the structural cylinder head functions and simultaneously serves as the housing for the fuel inlet valve. This multi-functionality eliminates the need for a separate dedicated housing structure, reducing installation complexity and cost
3Reliability
If a double-walled fuel supply pipe system is used, then leakage prevention is improved, but the system complexity increases
Solution Approach 1:
The fuel supply pipe system employs a double-walled configuration where an inner pipe is nested within an outer pipe. The inner pipe carries the fuel while the outer pipe provides a protective envelope and leakage detection capability. This nested structure prevents fuel leakage into the atmosphere while maintaining relatively simple system architecture
4Manufacturing precision
If an inlet valve casing is integrally casted on the cylinder head main body, then manufacturing precision requirements are reduced, but the leakage detection capability must be ensured
Solution Approach 1:
The leakage detection space is created by extracting or defining a specific volume between the inner surface of the inlet valve casing and the fuel inlet valve itself. This extracted space serves as a dedicated detection zone where pressure changes can indicate valve leakage, maintaining reliability while using the integral casting structure
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 configuration enhances the precision and cost-effectiveness of fuel inlet valve housing while providing a reliable method for detecting and localizing leaks in the fuel supply system, improving safety and efficiency in gas or dual-fuel engine operations.
Implementation Method 1
a pressure monitoring system using inert gas and pressure sensors to detect leaks
Data Source
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AI summary
A cylinder head (140, 140') configured to house at least partly a fuel inlet valve is disclosed. Cylinder heads have a separately formed inlet valve casing which has to be manufactured with high precision. The disclosed cylinder head (140, 140') may have an inlet valve casing (143, 143') casted on a cylinder head main body (149).