Vertical Diesel Engine Common Rail Protection and Cooling
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Solution Overview
Problem
Conventional multi-cylinder diesel engines lack effective protection for the common rail and its components, making them susceptible to damage during maintenance, and there is no means to prevent overheating.
Innovation Solution
A vertical multi-cylinder diesel engine design incorporates a passage forming means, such as an intake air distributing means, above the common rail to catch falling tools and parts, and an engine cooling fan to direct cooling air for enhanced protection and cooling efficiency, while strategically arranging components to prevent enlargement and improve maintenance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the common rail is positioned laterally of the cylinder block for compact arrangement, then the engine layout is optimized, but the common rail and its components become susceptible to damage from falling tools and parts during maintenance
Solution Approach 1:
The patent introduces a protective cover as an intermediary component positioned between the falling tools/parts and the common rail. This cover acts as a mediator that intercepts and protects the common rail and its components (pressure sensor, etc.) from damage during maintenance operations, while not interfering with the compact lateral arrangement of the common rail.
2Reliability
If protective measures are added to the common rail area, then the common rail is protected from damage, but the device complexity increases
Solution Approach 1:
The protective cover is designed to serve multiple functions simultaneously: it protects the common rail and its components from falling objects, provides structural support, and can be integrated with existing engine components. This multi-functionality reduces the need for additional separate protective devices, thereby limiting the increase in device complexity while maintaining effective protection.
3Temperature
If cooling air is directed below the passage forming means, then the common rail cooling is enhanced, but the horizontal width of the engine increases
Solution Approach 1:
The patent utilizes the vertical dimension by directing cooling air below the passage forming means and through the common rail area, rather than expanding horizontally. This vertical airflow path enhances cooling efficiency of the common rail without increasing the engine's horizontal width, effectively using the third dimension to resolve the spatial conflict.
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 design effectively protects the common rail and its components from damage and overheating, enhances maintenance efficiency, and reduces the engine's horizontal width without wasting space, thereby improving durability and operational efficiency.
Implementation Method 1
an engine cooling fan 4 is arranged in front of the common rail 3 so as to pass the produced cooling air below the passage forming means 23 disposed above the common rail 3
Implementation Method 2
a boss 6a projects downwardly from a lower wall 5a of the passage forming means 23 and horizontally crosses the lower wall 5a. Consequently, the cooling air which flows along the lower wall 5a of the passage forming means 23 is deflected downwardly by the boss 6a to collide against the common rail 3
Data Source
AI summary
The present invention has an object to provide a vertical multi-cylinder diesel engine capable of conveniently protecting a common rail and its parts. On the assumption that a width direction of a cylinder block (2) is taken as a horizontal direction, when arranging the common rail (3) horizontally lateral of the cylinder block (2), there is disposed above the common rail (3) a passage forming means (23) which is the alternative of an intake air distributing means (5) and an exhaust air converging means (22). The passage forming means (23) above the common rail (3) may be formed into a box-shaped structure with no branch pipe. Further, an engine cooling fan (4) may be arranged in front of the common rail (3) so as to pass cooling air below the passage forming means (23) above the common rail (3).