FMEADesign FMEA Application Example (Automotive) – Transmission Oil Pump System

The oil pump, a key sub-component of the vehicle transmission, circulates lubricating oil and maintains internal pressure. Any issues with the oil pump system can impact the cooling and lubrication of the transmission’s internal parts, reducing the lifespan of its components.


Through this FMEA-based failure analysis, we will practice identifying and mitigating risks while optimizing the system. With VisualPro’s streamlined procedure, safety analysis becomes simpler and more efficient.


This example is a hypothetical case representing a portion of the FMEA analysis and may differ slightly from real-world scenarios.




Step 1: Planning and Preparation

This initial step involves filling out basic planning information. These details will later be reflected in the final report, so entering them at the start ensures a smooth process.




Step 2: Structure Analysis

In this step, we analyze the overall transmission structure and break down the functions of individual components. The oil pump, part of the cooling and lubrication system within the transmission, connects to sub-components such as the oil seal. The structure can be visually represented through VisualPro’s boundary diagram.



Step 3: Functional Analysis

After defining the structure, we assign functions to each component. The oil pump, as part of the cooling and lubrication system, performs key functions:

  • Circulating lubricating oil
  • Maintaining internal pressure
  • Mitigating transmission shock


VisualPro streamlines functional analysis by automatically generating a function network based on the failure network, enabling users to proceed directly to Step 4 without delays.




Step 4: Failure Analysis

At this stage, the failure network is configured, and failure causes, severity, and noise factors are assigned. VisualPro allows frequently used noise factors to be stored in a library for easy access, saving time during future analyses.


Example:

If the oil pump’s function to circulate lubricating oil fails, the cooling and lubrication system cannot maintain internal lubrication, causing core transmission functions to fail.

Failure causes can be identified and documented using noise factors or by defining custom causes.



Step 5: Risk Analysis

Based on the failure analysis in Step 4, failure causes, frequency of occurrence, and detectability are assessed, and action priorities are assigned. VisualPro’s built-in calculation automatically displays action priorities based on entered frequency and detection levels, making it easy to prioritize mitigation measures.




Step 6: Optimization

This step focuses on reducing the frequency of occurrence and improving detectability. Preventive and detection measures are assigned to specific team members, with deadlines and performance updates documented. The goal is to develop actionable plans to minimize failure risks and improve system reliability.



Step 7: Documentation

In the final step, all analysis results are compiled into a comprehensive report. Basic information from Step 1 is included at the top, followed by detailed analyses and outcomes.


The report demonstrates how action priorities were reduced through optimization by lowering occurrence frequency and improving detection levels. Although this example focuses on the oil pump, applying FMEA across the entire transmission system would result in a more extensive and detailed report.


This FMEA process highlights the systematic reduction and elimination of risks, providing a clear path for ensuring system safety and reliability. 


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Roh Kyung Hyun
04559, 5F Pyeonggwang Building, 243 Toegye-ro, Jung-gu, Seoul (Chungmuro 5-ga 19-19)
+82-10-8337-9837
631-81-00287
www.vwaycorp.com
vway@vwaycorp.com

© VWAY All rights reserved


Representative

Roh Kyung HyunBusiness Registration Number
631-81-00287
Company Address
5th Floor, Pyeong-kwang B/D, 243, Toegye-ro, Jung-gu, Seoul, Republic of Korea
Website
www.vwaycorp.com
Telephone
+82-2-2285-6541
Representative Email
vway@vwaycorp.com

© VWAY All rights reserved