Split Engine Crankshaft Coupling at Main Bearing
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Solution Overview
Problem
Existing split engine designs face challenges with increased fuel consumption, noise, vibration, and harshness issues due to internal compression, power loss from moving pistons, and torque fluctuations, while also requiring additional space and specialized components.
Innovation Solution
A compact coupling device for a split, in-line engine that connects divided crankshaft sections at main bearings, allowing for the same engine block to be used for both regular and split engines, with a clutch for easy engagement and disengagement, and a lock-up mechanism to prevent slippage, enabling efficient power delivery and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If separate crank shafts are used for split engine design, then fuel economy is improved, but additional space between adjacent cylinders is required
Solution Approach 1:
The coupling device is positioned at the main bearing and encircled by it, with the coupling device nested within the bearing structure. This nesting arrangement allows the coupling mechanism to occupy minimal additional space while still enabling the split crank shaft configuration for improved fuel economy.
Solution Approach 2:
The coupling device utilizes the radial dimension by being encircled by the main bearing, rather than requiring additional axial space between cylinders. This dimensional repositioning allows the split engine configuration to be achieved without increasing the engine's overall length or cylinder spacing.
2Use of energy by moving object
If split engine design is implemented, then fuel efficiency is improved, but device complexity increases
Solution Approach 1:
The coupling device acts as an intermediary element between the two crank shaft sections, providing a standardized interface that simplifies the connection mechanism. By using a coupling device positioned at the main bearing with encirclement, the complexity of connecting two separate crank shafts is reduced to a standardized, maintainable configuration.
Solution Approach 2:
The coupling device serves multiple functions: it connects the two crank shaft sections, allows for disengagement to stop selected cylinders, and is positioned within the main bearing structure. This multi-functionality reduces the need for separate components and simplifies the overall system architecture.
3Volume of moving object
If main bearings are used to encircle coupling device, then engine dimensions are maintained, but manufacturing precision requirements increase
Solution Approach 1:
The main bearing itself serves as the positioning and supporting structure for the coupling device. The coupling device is encircled by the main bearing, which provides automatic alignment and positioning through its inherent cylindrical geometry and mounting structure, reducing the need for additional precision positioning features.
Data Source
AI summary
A coupling device for a split, in-line engine is provided. The coupling device may be configured to connect a first section of a crank shaft to a second section of the crank shaft of the engine. Further, the coupling device may be positioned at at least one main bearing of the crank shaft. Further still, the coupling device may be encircled by the at least one main bearing.