Engine Oil Passageway Structure for Generator-to-Water Pump Lubrication
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Solution Overview
Problem
Existing oil passageway structures for internal combustion engines face challenges in efficiently supplying engine oil to generators and water pumps when they are concentrically connected to a crankshaft, leading to increased oil supply amounts and potential accumulation, which can affect cooling and lubrication.
Innovation Solution
An oil passageway structure that collects engine oil from the generator and supplies it to the water pump without branching, using a generator cover-side guide portion and protective cover-side guide portion to ensure efficient oil distribution, with a breather chamber for gas-liquid separation and oil return.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If engine oil is supplied to the generator and water pump in parallel, then both components receive lubrication and cooling, but the oil supply amount must be increased, enlarging the oil pump and engine
Solution Approach 1:
The protective cover is nested on the outer side of the generator cover, creating a compact concentric structure. The water pump is positioned within the protective cover, and the oil passageways are nested within the generator cover, allowing sequential oil supply without requiring additional external space or larger pump capacity
Solution Approach 2:
The generator cover includes oil passageways that supply engine oil to the generator first before it flows to the water pump. The generator cover-side guide portion collects oil from the generator housing space and directs it to the protective cover-side guide portion, which then supplies it to the water pump drive shaft. This sequential arrangement ensures the generator receives cooling oil first, then the water pump receives lubrication oil, eliminating the need for increased oil supply amount
2Volume of moving object
If the generator and water pump are concentrically connected to the crankshaft, then space is saved, but the oil supply structure becomes more complex and requires separate covers and guide portions
Solution Approach 1:
The generator cover serves multiple functions: it covers the generator, contains oil passageways for supplying oil to the generator, and includes a generator cover-side guide portion for collecting and directing oil to the water pump. The protective cover similarly serves as both a protective enclosure and a structural component that houses the water pump and includes the protective cover-side guide portion for oil distribution. This multi-functionality reduces the need for separate dedicated components
Solution Approach 2:
The oil supply system merges the generator cooling function and water pump lubrication function into a single integrated oil circulation path. The generator cover and protective cover are combined with guide portions that work together to direct oil flow, eliminating the need for separate oil supply systems for each component
3Loss of substance
If oil is collected from the generator housing space, then oil accumulation is prevented, but the guide portion structure must be added to the generator cover
Solution Approach 1:
The generator cover-side guide portion utilizes the natural centrifugal force and gravity of the rotating engine oil to collect oil from the generator housing space and direct it toward the protective cover side. The guide portion structure leverages the existing oil flow dynamics rather than requiring active pumping or complex mechanical mechanisms, allowing the system to self-regulate oil collection and distribution
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 suppresses oil supply amounts, enhances generator cooling, increases power generation, and ensures proper lubrication of the water pump's oil seal, while efficiently circulating engine oil and promoting gas-liquid separation.
Implementation Method 1
the engine oil that has been supplied to the generator and has cooled the generator can be collected on the inner surface of the generator cover by a centrifugal force
Implementation Method 2
a breather chamber for gas-liquid separation and oil return
Data Source
AI summary
An oil passageway structure for IC engines includes a generator provided on one end side of a crankshaft, a generator cover that covers the generator and is fixed to an engine crankcase, a protective cover provided outside the generator cover and a water pump attached to an outer surface of the protective cover and having a drive shaft coaxially connected to one end of the crankshaft. The generator cover includes oil passageways that supply engine oil from the crankcase to the generator, and a generator cover-side guide portion that flows out engine oil collected from a generator housing space housing the generator toward the protective cover, and the protective cover includes a protective cover-side guide portion that guides and supplies the engine oil flowing out from the generator cover-side guide portion to the drive shaft of the water pump.