Case Study: Reducing Noise in Electric Power Steering Systems
Background:
Noisy automotive components can have a negative impact on how consumers perceive the quality of a brand. As vehicles incorporate increasingly sophisticated electric designs, more lubrication points are required to ensure safe, noiseless, and smooth operation. A world leader in the manufacture and design of steering systems noticed that their new Electric Power Steering design had significant noise issues. The Tier 1 Supplier approached one of Nye's affiliates in search of a new lubricant for their EPS input shaft after a competitor’s grease was unable to sufficiently dampen noise. The Supplier needed a viscous grease that would control motion and eliminate noise and vibration to ensure drivers get the best possible steering experience.
Challenge:
- Can the lubricant eliminate noise coming from upper shaft teeth contact area and provide smooth operation within the required temperature range?
Solution:
NyoGel® 767A
A silica thickened, heavy viscosity, synthetic hydrocarbon grease
- Reduces free motion and noise of relatively loose-fitting components
- Reduces vibration and harshness for a quality feel
- Compatible with most plastics and elastomers
| Product | Chemistry | Temperature Range |
Kinematic Viscosity 100 °C 40 °C |
Oil Separation (24 hours 100 °C) |
Evaporation 24 hours 100 °C |
|---|---|---|---|---|---|
| NYOGEL 767A | PAO/Silica | 0 to 125 °C | 851.5 cSt 28185 cSt |
0.1 % | 0.2 |
Results
After passing ambient cold temperature tests and other in-house testing, the automotive tier supplier found that NyoGel® 767A successfully eliminated noise in the contact area between the pinion and upper shaft teeth. The Supplier and the OEM were so pleased with NyoGel® 767A that they decided to use this solution on other steering projects that require motion control.
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