Powertrain Guard Member Rigidity Integration
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Solution Overview
Problem
Existing powertrain units lack sufficient rigidity, which can lead to reduced stability and increased noise due to resonance, and may cause erroneous sensor readings from impact loads, especially when a guard member is not securely integrated with the powertrain unit.
Innovation Solution
A guard member is securely attached to the powertrain unit, spanning from a position in front of the transmission to a position behind it, and optionally to cross members, to enhance the overall rigidity and absorb impact loads, thereby reducing noise and improving sensor accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a guard member is provided at a position away from the powertrain unit (secured only to cross members), then the guard member can protect the oil pan from flying rocks and road surface contact, but the rigidity of the guard member does not contribute to improving the rigidity of the powertrain unit
Solution Approach 1:
The guard member is merged with the powertrain unit by securing it to both the powertrain unit and cross members, creating an integrated structure where the guard member serves dual purposes: protecting the oil pan and reinforcing the powertrain unit rigidity
Solution Approach 2:
The guard member is designed to perform multiple functions simultaneously: it protects the oil pan from external impacts and contributes to improving the rigidity of the powertrain unit by being secured to both the cross members and the powertrain unit
2Strength
If the guard member is secured to the powertrain unit, then the rigidity of the powertrain unit is improved by utilizing the rigidity of the guard member, but the load (impact) input to the powertrain unit increases
Solution Approach 1:
The guard member is secured to both the powertrain unit and cross members, creating a shared load path that distributes impact forces to both structures rather than concentrating them on the powertrain unit alone
3Object-affected harmful factors
If a guard member is provided below the oil pan, then the oil pan is protected from road surface contact and flying rocks, but additional reinforcement members may be needed to maintain powertrain unit rigidity
Solution Approach 1:
The guard member is designed to perform multiple functions simultaneously: it protects the oil pan from external impacts and contributes to improving the rigidity of the powertrain unit, eliminating the need for separate reinforcement members
Solution Approach 2:
The guard member serves itself by utilizing its own rigidity to reinforce the powertrain unit structure, without requiring additional reinforcement members to be added to the system
Data Source
AI summary
A powertrain unit includes an engine and a power transmission device that transmits drive force of the engine to a drive wheel of a vehicle, the power transmission device including a transmission provided in a power transmission path between the engine and the drive wheel. An oil pan is provided below the transmission. A guard member covering at least a portion of the oil pan from below is provided below the oil pan. The guard member has a first end secured to a portion of the powertrain unit which is located in front of the transmission in a vehicle longitudinal direction, and has a second end, opposite the first end, secured to a portion of the powertrain unit which is located behind the transmission in the vehicle longitudinal direction. The rigidity of the powertrain unit is improved by utilizing the rigidity of the guard member.