V-Type 12-Cylinder Diesel Engine Classified Cooling and Fuel Injection
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Solution Overview
Problem
High-power high-speed diesel engines require advanced systems for cylinder assembly, power, fuel, cooling, and lubrication to meet high power and torque demands, but existing technologies fall short in achieving compactness and efficiency while maintaining high performance.
Innovation Solution
A V-type 12-cylinder diesel engine design featuring a V-shaped cylinder block with double-side diesel supply, two sets of supercharged intercoolers for improved air density, and separate high and low temperature water circulation loops for classified cooling, along with electronic control unit pumps for precise fuel injection, enhancing combustion efficiency and reducing fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a V-type 12-cylinder configuration is used to achieve high power and large torque, then the engine meets high power demands, but the engine structure becomes complex and occupies more space
Solution Approach 1:
The engine divides 12 cylinders into two banks of 6 cylinders each, arranged in a V-configuration at 60 degrees. Each bank has its own cylinder head, sleeves, and fuel injection system, allowing independent assembly and maintenance while achieving the required 12-cylinder power output
Solution Approach 2:
The cylinder block is designed with integrated functions including crankshaft support, oil pan mounting, fuel injection pump mounting, and cooling system integration. The sleeves are cast directly onto the cylinder block, combining multiple components into unified structures that reduce overall complexity
2Measurement precision
If twelve electric control unit pumps are mounted in sleeves for precise fuel injection control, then fuel injection precision is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The fuel injection pump, injection nozzle, and control mechanism are integrated into a single electric control unit that is mounted directly within each sleeve. This consolidation reduces the number of separate components and simplifies the fuel delivery system while maintaining precise injection control through electronic management
3Temperature
If separate high and low temperature water circulation loops are used for classified cooling, then cooling efficiency is improved, but the system complexity increases
Solution Approach 1:
The cooling system is divided into two separate circulation loops: a high-temperature loop for cooling the cylinder block and a low-temperature loop for cooling the sleeves and intercoolers. Each loop has its own water pump and radiator, allowing optimized cooling for different thermal zones without requiring a single complex unified system
4Productivity
If two sets of supercharged intercoolers are installed to improve air density, then combustion efficiency is improved, but the engine size and device complexity increase
Solution Approach 1:
The intercoolers are positioned vertically above the cylinder banks, utilizing the vertical space in the V-type configuration. This arrangement improves air density for combustion while minimizing the horizontal footprint of the engine, effectively using the third dimension to accommodate additional cooling components
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
The engine achieves high power and large torque with improved fuel efficiency, reduced heat energy loss, and a more compact, robust design, meeting the stringent requirements of high-power applications while minimizing fuel consumption.
Implementation Method 1
The cooling system comprises a high temperature water circulation loop used for cooling the V-shaped cylinder block and the twelve single cylinder heads, and a low temperature water circulation loop used for cooling the oil cooler
Implementation Method 2
The twelve electric control unit pumps are mounted in the corresponding sleeve, respectively, and each electric control unit pump is used for controlling diesel injection to each cylinder
Implementation Method 3
A piston with a W-shaped combustion chamber is arranged in the two rows of cylinder holes
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The present invention discloses a V-type 12-cylinder diesel engine which includes a V-shaped cylinder block and twelve single cylinder heads; an diesel supply system; a lubricating system; and a cooling system. The cooling system has a high temperature water circulation loop and a low temperature water circulation loop. The low temperature water circulation loop comprises a rear row radiator and a low temperature water pump, the low temperature water circulation loop is used for cooling the oil cooler, and the high temperature water circulation loop comprises a front row radiator and a high temperature water pump, and the high temperature water circulation loop is used for cooling the V-shaped cylinder block and the twelve single cylinder heads.