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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19585

Title: Evaluating the performance improvement of different pneumatic hybrid boost systems and their ability to reduce turbo-lag
Authors: Bao, Ran
Stobart, Richard
Keywords: Turbochargers
Pneumatic systems
Issue Date: 2015
Publisher: © SAE International
Citation: BAO, R. and STOBART, R., 2015. Evaluating the performance improvement of different pneumatic hybrid boost systems and their ability to reduce turbo-lag. SAE Technical Papers, 2015-01-1159.
Abstract: The objective of the work reported in this paper was to identify how turbocharger response time ("turbo-lag") is best managed using pneumatic hybrid technology. Initially methods to improve response time have been analysed and compared. Then the evaluation of the performance improvement is conducted using two techniques: engine brake torque response and vehicle acceleration, using the engine simulation code, GT-SUITE [1]. Three pneumatic hybrid boost systems have been considered: Intake Boost System (I), Intake Port Boost System (IP) and Exhaust Boost System (E). The three systems respectively integrated in a six-cylinder 7.25 l heavy-duty diesel engine for a city bus application have been modelled. When the engine load is increased from no load to full load at 1600 rpm, the development of brake torque has been compared and analysed. The findings show that all three systems significantly reduce the engine response time, with System I giving the fastest engine response. The vehicle performance has been also considered. Systems I and IP have been integrated respectively into the bus model giving two different configurations. The acceleration capability of the two types of vehicle has been simulated. Both Systems I and IP significantly reduce the vehicle acceleration time by substantially reducing turbo-lag.
Description: Copyright © 2015 SAE International. This paper is posted on this site with permission from SAE International, and is for viewing only. Further use or distribution of this paper is not permitted without permission from SAE.
Sponsor: This research is sponsored by the UK Engineering and Physical Science Research Council (EPSRC), grant reference number, EP/I00601X/I “A Cost-Effective Regenerative Air Hybrid Powertrain for Low Carbon Buses and Delivery Vehicles”
Version: Accepted for publication
DOI: 10.4271/2015-01-1159
URI: https://dspace.lboro.ac.uk/2134/19585
Publisher Link: http://dx.doi.org/10.4271/2015-01-1159
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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