SAE technical papers on CD-ROM/SAE technical paper series, Journal Year: 2024, Volume and Issue: unknown

Published: June 12, 2024

<div class="section abstract"><div class="htmlview paragraph">The benefits introduced by the replacement of conventional centrifugal pumps with volumetric machines for Internal Combustion Engines (ICEs) cooling were experimentally and theoretically proven in literature. Sliding Rotary Vane Pumps (SVRPs) ensure to achieve an interesting reduction ICEs fuel consumption CO₂ emissions. Despite are a reference technology ICE lubrication oil circuits, application systems still not represent ready-to-market solution. Particularly challenging is case Heavy-Duty due wide operating range pump covers terms flow rate delivered pressure rise.</div><div paragraph">Generally, SVRPs designed operate at high speeds reduce machine dimensions and, consequently, weight. Nevertheless, speed increase could lead severe penalization performance since growth friction losses. They produce wear phenomena which require expensive surface treatments or, more generally, adoption materials resist higher mechanical stresses. Authors their previous works developed alternative design strategy based on compensating size capability. It was found thanks peculiar property SVRPs. An optimized variation eccentricity leads volume capability, negligible dimensions. In this way, be reduced avoiding size. A Low-Speed (LS) SVRP prototype hence built, benefit proposed demonstrated after theoretical model-based design.</div><div paragraph">A further performances presented paper. Machine shaping indeed stator diameter/pump length ratio, considering that two geometrical parameters influence volumetric, indicated, efficiencies. The optimization these produces combined positive effect overall efficiency improvement. Hence, updated comprehensive modelling, produced work. Finally, compared (CURSOR 13 NG) over WHTC (World Harmonized Transient Cycle) offered energy drive calculated.</div></div>

Language: Английский