Multi-Stage Oil Pump Layout for Low-Vibration Internal Combustion Engines
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Solution Overview
Problem
Conventional internal combustion engines face limitations in noise, smoothness, efficiency, and emissions due to their crankshaft and connecting rod mechanisms.
Innovation Solution
An internal combustion engine design featuring a piston coupled to an output shaft through a coupling that drives its rotation, incorporating a multi-stage oil pump arrangement with specific regulators and a scotch yoke mechanism, including a slider bearing with targeted lubrication and a unique crankshaft and balance shaft configuration to reduce friction and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional crankshaft and connecting rod mechanism is used, then the engine can achieve basic power output, but the engine suffers from high noise, poor smoothness, and inefficient oil lubrication
Solution Approach 1:
The patent replaces the conventional crankshaft and connecting rod mechanical system with a piston directly coupled to an output shaft through a coupling mechanism. This substitution eliminates the complex crankshaft mechanism while achieving the same power transmission function, thereby reducing noise and vibration without sacrificing basic engine operation
Solution Approach 2:
The oil pump system is divided into multiple stages with separate regulators (primary regulator and secondary regulator) that independently control oil flow to different components. This segmentation allows optimized lubrication for specific high-friction areas like the coupling and output shaft, improving overall lubrication efficiency while maintaining manageable system complexity
2Reliability
If a single-stage oil pump regulator is used, then the device complexity is low, but the lubrication efficiency and oil pressure control are insufficient
Solution Approach 1:
The single regulator is divided into two independent regulators: a primary regulator that controls oil flow to the coupling and output shaft, and a secondary regulator that controls oil flow to the piston and cylinder. Each regulator independently maintains optimal oil pressure for its specific components, improving overall lubrication reliability while keeping each individual regulator relatively simple
Solution Approach 2:
Different oil pressure levels are provided to different components based on their specific lubrication requirements. The coupling and output shaft receive oil pressure controlled by the primary regulator, while the piston and cylinder receive oil pressure controlled by the secondary regulator. This localized quality approach ensures optimal lubrication for each component without requiring a complex single regulator
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 improved performance by maintaining higher charge density, reducing emissions, and enhancing fuel mixing, with lower noise and vibration, while optimizing lubrication and reducing manufacturing costs.
Implementation Method 1
the piston is arranged for reciprocating motion within the cylinder, driven by combustion
Implementation Method 2
the slider bearing having at least one oil gallery to supply oil to at least one of the sides
Data Source
AI summary
An internal combustion engine, including a piston, a cylinder, and an output shaft, wherein the piston is arranged for reciprocating motion within the cylinder, driven by combustion, and the piston is coupled to the output shaft by a coupling such that said reciprocating motion of the piston drives rotation of the output shaft, wherein the engine further includes an oil pump arrangement having a multi-stage regulator.