Optimal Pressure Relief Groove Geometry for Improved NVH Performance of Variable Displacement Oil Pumps

Features
Event
Noise and Vibration Conference & Exhibition
Authors Abstract
Content
Variable Displacement Oil Pump (VDOP) is becoming the design of choice for engine friction reduction and fuel economy improvement. Unfortunately, this pump creates excessive pressure ripples, at the outlet port during oil pump shaft rotation, causing oscillating forces within the lubrication system and leading to the generation of objectionable tonal noises and vibrations. In order to minimize the level of noise, different vanes spacing and porting geometries are used. Moreover, an oil pressure relief groove can be added, at the onset of the high pressure port, to achieve this goal.
This paper presents an optimization method to identify the best geometry of the oil pressure relief groove. This method integrates adaptive meshing, 3D CFD simulation, Matlab routine and Genetic Algorithm based optimization. The genetic algorithm is used to create the required design space in order to perform a multi-objective optimization using a large number of parameterized groove geometries. Results of this optimization method are discussed and a design guideline for the oil pressure relief groove is disclosed.
Meta TagsDetails
DOI
https://doi.org/10.4271/2019-01-1548
Pages
5
Citation
Zouani, A., and Marri, V., "Optimal Pressure Relief Groove Geometry for Improved NVH Performance of Variable Displacement Oil Pumps," SAE Int. J. Adv. & Curr. Prac. in Mobility 1(4):1790-1794, 2019, https://doi.org/10.4271/2019-01-1548.
Additional Details
Publisher
Published
Jun 5, 2019
Product Code
2019-01-1548
Content Type
Journal Article
Language
English