Water-Cooled Engine Cylinder Head Cooling Outlet Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing cooling water circulation structure in internal combustion engines is complex, leading to a bulky cylinder block and inefficient cooling due to the need for a return water path, which complicates the layout of cooling water piping and affects temperature detection accuracy.
Innovation Solution
A revised cooling water circulation structure where the cooling water outlet portion is positioned closer to the radiator than the accommodation chamber, allowing the cooling water to flow directly from the cylinder head to the radiator without returning through the cylinder block, and a temperature sensor is placed orthogonally to the cylinder head to minimize local temperature interference, while the air vent pipe is shortened to improve piping layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a return water path is provided in the cylinder block to return cooling water from the cylinder head to the cylinder block, then the cooling water circulation structure can be completed, but the cylinder block size is enlarged and the cooling water circulation structure is complicated
Solution Approach 1:
The invention extracts the return water path function from the cylinder block by providing a separate return water passage in the engine body. This allows the cylinder block to be reduced in size while maintaining the cooling water circulation function. The return water passage is formed separately in the engine body, separating the cooling water circulation path from the cylinder block structure.
2Reliability
If a return water path is provided in the cylinder block, then cooling water circulation is enabled, but the cooling water piping layout becomes more complex and harder to compact
Solution Approach 1:
The invention extracts the return water path from the cylinder block and relocates it to the engine body. This separation allows for a more compact and simplified piping layout, as the return water passage can be integrated into the engine body structure rather than requiring space within the cylinder block.
3Adaptability or versatility
If the accommodation chamber for the transmission mechanism is disposed in the end portion toward the radiator, then the transmission mechanism can be accommodated, but the distance between the radiator and water jackets is lengthened, making piping layout difficult
Solution Approach 1:
The invention positions the cooling water outlet portion in the cylinder head at a location that is closer to the radiator in the prescribed direction. This spatial reconfiguration allows the cooling water piping to be shortened and simplified, while the accommodation chamber for the transmission mechanism can be positioned in the end portion toward the radiator without interfering with the piping layout.
4Measurement precision
If the temperature sensor is disposed in the water jacket to detect engine temperature, then temperature detection is enabled, but local water temperature changes affect detection accuracy and the disposition may prevent compact piping layout
Solution Approach 1:
The invention uses the cooling water outlet portion as an intermediary location for the temperature sensor. This outlet portion is positioned to represent the average engine temperature more accurately while being located in a space that does not interfere with compact piping layout. The temperature sensor detects the temperature of cooling water at this strategic location, providing accurate engine temperature measurement without compromising piping design.
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 simplifies the water circulation structure, reduces the size of the cylinder block, improves cooling efficiency, and enhances the accuracy of engine temperature detection while allowing for a more compact layout of cooling water piping.
Implementation Method 1
a radiator through which the cooling water circulates from water jackets provided in a cylinder block and a cylinder head included in an engine body
Implementation Method 2
a water pump which pressure-feeds cooling water to the water jackets
Implementation Method 3
cooling water circulates from water jackets provided in a cylinder block and a cylinder head
Data Source
AI summary
A water circulation structure of a cylinder block having a compact layout of piping connecting an engine body and a radiator. A water-cooled internal combustion engine is provided with an engine body including a cylinder block and a cylinder head and a radiator. The radiator is disposed to be separated, in a prescribed direction, i.e. in a rightward direction, from the engine body. A cooling water outlet portion is open to a cylinder head water jacket and is provided in the end portion of the cylinder head. The cooling water outlet portion being connected with an inlet pipe for leading the cooling water flowing out of a cylinder block water jacket into the cylinder head water jacket to the radiator. The cooling water outlet portion is disposed to the right closer to the radiator than a chain chamber.