V-Type Engine Oil Return Paths Preventing Reverse Flow
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Solution Overview
Problem
In V-type engines, the oil return path to the oil pan is hindered by gravitational inclinations and reverse flows during vehicle acceleration, deceleration, or turning, leading to improper lubrication and increased oil consumption.
Innovation Solution
The engine design incorporates oil return main paths along the cylinder block's side surfaces and oil return extension paths that extend towards the oil pan's bottom surface, with the extension paths defined by a portion of the oil pan, preventing reverse oil flow by connecting to opposite sides of the block, thus ensuring proper oil return even during vehicle maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the oil return path is inclined along both sides of the engine to accommodate V-type configuration, then the engine can achieve proper oil return under normal conditions, but during vehicle acceleration or turning, the oil may be inclined towards the oil return path causing reverse flow and hindering oil circulation
Solution Approach 1:
The oil return path is divided into multiple segments: oil return main paths along the cylinder block side surfaces and oil return extension paths extending towards the oil pan bottom surface. This segmentation allows oil to be returned through multiple routes, preventing reverse flow during vehicle maneuvers while maintaining adaptability to the V-type engine configuration.
Solution Approach 2:
The oil return extension paths extend in a direction towards the bottom surface of the oil pan, adding a vertical dimension to the oil return pathway. This dimensional change ensures that oil returns to the oil pan from below, preventing reverse flow caused by gravitational inclination during acceleration or turning.
2Reliability
If the oil return path extends further to prevent reverse flow, then oil circulation reliability improves, but the device complexity and space requirements increase
Solution Approach 1:
The oil return extension paths are integrated with the oil pan structure, merging the oil return function with the oil pan body. This integration prevents reverse flow while avoiding additional complexity from separate components, as the extension paths are formed as part of the oil pan structure.
Solution Approach 2:
The oil pan structure serves multiple functions: it contains the oil reservoir and simultaneously forms the oil return extension paths. This multi-functionality reduces device complexity by eliminating the need for separate oil return components while maintaining reliable oil circulation.
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 design ensures effective oil circulation and prevents reverse oil flow, maintaining proper lubrication and reducing oil consumption, while also saving space and reducing the number of parts.
Implementation Method 1
when acceleration in a front-back direction or a lateral direction of a vehicle, which causes the oil to be inclined towards the oil return path, is increased, the oil may no longer be returned by gravitational force through the oil return path
Data Source
AI summary
An engine oil return device for an engine having a cylinder head (3L,3R) and a cylinder block (2) is disclosed. The oil return device comprises an oil pan (4) and an oil return path. The oil return path includes at least one oil return main path (11L11R) and at least one oil return extension path (12L,12R). The oil return main path (11L,11R) is disposed at a first side surface of the cylinder block. The oil return extension path includes an upstream end and a downstream end. The upstream end is connected to the oil return main path. The downstream end is positioned at a distance from the first side surface such that the oil return extension path extends in a direction of the second side surface of the cylinder block. At least a portion of the oil return extension path is defined by a portion of the oil pan.