Vehicle Ignition Plug Cooling via Air and Oil Channels
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Solution Overview
Problem
Conventional ignition plug cooling devices for vehicle engines inadequately cool the second ignition plug due to limited space, resulting in inferior cooling compared to the first plug, and lack flexibility in plug arrangement, affecting durability and engine performance.
Innovation Solution
The design incorporates an air flow passage for the first ignition plug and a cooling oil chamber for the second ignition plug, allowing for independent cooling and increased flexibility in plug arrangement, with the air flow passage and cooling oil chamber being freely formed in the cylinder head to enhance cooling efficiency and maintenance accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If two independent air flow passages are formed to cool both ignition plugs, then cooling efficiency of both plugs is improved, but device complexity and space requirements increase
Solution Approach 1:
The cooling system is segmented into two independent pathways: the first ignition plug is cooled by air flow through a dedicated air flow passage, while the second ignition plug is cooled by oil circulation through a separate cooling oil chamber. This segmentation allows each plug to be cooled by the most appropriate medium without requiring complex integrated cooling structures.
Solution Approach 2:
The cooling system merges two different cooling methods (air cooling and oil cooling) into a unified cylinder head design. The air flow passage and cooling oil chamber are integrated into the same component (cylinder head), allowing both ignition plugs to be cooled effectively while maintaining a compact overall structure.
2Temperature
If two independent air flow passages are formed to cool both ignition plugs, then cooling efficiency of both plugs is improved, but the available space in the cylinder head is insufficient
Solution Approach 1:
The system uses two different fluids (air and oil) with different physical properties to cool the ignition plugs. Air is used for the first plug through a flow passage, while oil is used for the second plug through a cooling chamber. This allows efficient use of space by leveraging the different densities and flow characteristics of the two fluids.
Solution Approach 2:
The cooling oil chamber is formed in the lower portion of the cylinder head, utilizing vertical space rather than only horizontal space. This three-dimensional arrangement of cooling pathways allows both cooling systems to coexist within the limited cylinder head volume without interfering with each other.
3Device complexity
If the first and second ignition plugs are arranged in one air flow passage, then device complexity is reduced, but the cooling property of the second ignition plug becomes inferior
Solution Approach 1:
Different cooling qualities are applied to different locations: the first ignition plug (located where air flow is most effective) receives air cooling, while the second ignition plug (located where air flow is less effective) receives oil cooling through the cooling oil chamber. This local differentiation ensures optimal cooling for each plug based on its specific thermal environment.
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 effectively cools both ignition plugs, enhancing their durability and contributing to improved engine output performance and fuel efficiency, while allowing for easier maintenance and utilization of previously underutilized space in the cylinder head.
Implementation Method 1
the first ignition plug is arranged in the air flow passage so as to enable cooling of the first ignition plug by the flow of air which passes through the air flow passage
Implementation Method 2
the second ignition plug is arranged adjacent to the cooling oil chamber so as to enable cooling of an area around the second ignition plug by oil which passes through the cooling oil chamber
Data Source
AI summary
An ignition plug cooling device of a vehicle engine for efficiently cooling the ignition plugs while increasing the freedom in the arrangement of the ignition plugs. A vehicle engine includes a first ignition plug and a second ignition plug for making respective electrodes thereof face a combustion chamber and are mounted on a cylinder head. An air flow passage through which a flow of air passes and a cooling oil chamber through which lubrication oil for the engine passes are formed in the cylinder head. The first ignition plug is arranged in the air flow passage to enable a cooling of the first ignition plug by the flow of air which passes through the air flow passage. The second ignition plug is arranged adjacent to the cooling oil chamber to enable a cooling of an area around the second ignition plug by oil which passes through the cooling oil chamber.