Dual-Sided Crankcase Maintenance for Engine Installation Flexibility
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Solution Overview
Problem
Existing internal combustion engines lack flexibility in maintenance access due to limited installation variants, as they typically have only one maintenance side, restricting the ability to choose a maintenance side based on installation situations.
Innovation Solution
An internal combustion engine design featuring a crankcase with oil filter surfaces on both sides, allowing optional processing of connection surfaces to create a maintenance side, along with a side part that can be connected to the crankcase to route oil supply and return lines, and incorporating an oil pressure control valve to manage oil flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the crankcase has only one maintenance side, then the structure is simpler, but the installation flexibility and maintenance accessibility are limited
Solution Approach 1:
The crankcase is divided into two symmetrical halves, each with identical maintenance-side features (oil filter surface, dipstick bore, filler neck, turbocharger connection). This segmentation allows either side to serve as the maintenance side depending on installation requirements, directly resolving the contradiction between installation flexibility and structural simplicity.
Solution Approach 2:
While the overall crankcase structure is symmetrical, the oil duct arrangement is designed to be adaptable - the side panel can seal different oil supply openings based on which side is chosen as the maintenance side. This controlled asymmetry in the oil routing system enables maintenance side selection without compromising structural simplicity.
2Ease of operation
If the crankcase has oil filter surfaces on both sides, then maintenance accessibility improves, but the manufacturing complexity increases
Solution Approach 1:
Both sides of the crankcase are designed with identical maintenance features (oil filter surface, dipstick bore, filler neck, turbocharger connection surface), making each side universally capable of serving as the maintenance side. This multi-functionality improves maintenance accessibility while the symmetrical design actually simplifies manufacturing by allowing identical tooling and processes for both sides.
Solution Approach 2:
The crankcase is manufactured as a blank with all maintenance features pre-formed on both sides before final assembly. The side panel is then attached to seal the appropriate oil supply openings based on the chosen maintenance side. This preliminary preparation of both sides during manufacturing enables flexible maintenance side selection without requiring complex post-manufacturing modifications.
3Adaptability or versatility
If the side panel seals oil supply openings, then oil routing flexibility improves, but the sealing complexity increases
Solution Approach 1:
The side panel acts as a dynamic sealing element that can be positioned to seal different oil supply openings on the crankcase. Depending on which side is chosen as the maintenance side, the side panel seals either the left or right oil supply opening, providing flexible oil routing without requiring complex fixed sealing systems for both configurations.
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
The invention relates to an internal combustion engine, comprising at least one crankshaft and a crankcase (1) that supports the crankshaft, wherein the crankcase, in particular as an unfinished part, has at least two oil filter surfaces (2, 3) on opposite sides of the crankcase (1).