Experimental analysis of the V-Charge variable drive supercharger system on a 1.0 L GTDI engine

Bo Hu, Sam Akehurst, Andrew G.J. Lewis, Pengfei Lu, Darren Millwood, Colin Copeland, Edward Chappell, Andrew De Freitas, James Shawe, Dave Burtt

Research output: Contribution to journalArticle

40 Downloads (Pure)

Abstract

A compound charging system that pairs a turbocharger with a supercharger seems to be a potential trend for future passenger car gasoline engines, as the strength of both could be enhanced and the deficiencies of each could be offset. The use of a fixed-ratio positive-displacement supercharger system on a downsized turbocharged gasoline engine has already appeared on the market. Although such systems can achieve enhanced low-end torque and improved transient response, several challenges still exist. An alternative solution to the fixed-ratio positive-displacement supercharger is the V-Charge variable ratio centrifugal supercharger. This technology utilizes a Torotrak continuously variable transmission (CVT) coupled to a centrifugal compressor for near silent boosting. With a wide ratio spread of 10:1 and rapid rate of ratio change, the compressor speed can be set independently of the engine speed to provide an exact boost pressure for the required operating points, without the need to recirculate the air through a bypass valve. A clutch and an active bypass valve can also be eliminated, due to the CVT capability to down-speed, thus improving the noise vibration and harshness performance. This paper will, for the first time, present and discuss the V-Charge technology optimization and experimental validation on a 1.0 L GTDI engine to achieve a better brake specific fuel consumption and transient response over the turbo-only and the fixed-ratio positive-displacement supercharger solution. The potential for the V-Charge system to increase the low-end torque and enable a down-speeding strategy is also discussed.

Original languageEnglish
Pages (from-to)449-465
Number of pages17
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Volume232
Issue number4
Early online date16 Oct 2017
DOIs
Publication statusPublished - 1 Mar 2018

Fingerprint

Superchargers
Engines
Transient analysis
Gasoline
Torque
Centrifugal compressors
Clutches
Passenger cars
Brakes
Fuel consumption
Compressors
Air

Keywords

  • downsized
  • gasoline engine
  • supercharger
  • V-Charge
  • variable drive

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

Cite this

@article{a993ba4c2de241f3b2639d60486a42e7,
title = "Experimental analysis of the V-Charge variable drive supercharger system on a 1.0 L GTDI engine",
abstract = "A compound charging system that pairs a turbocharger with a supercharger seems to be a potential trend for future passenger car gasoline engines, as the strength of both could be enhanced and the deficiencies of each could be offset. The use of a fixed-ratio positive-displacement supercharger system on a downsized turbocharged gasoline engine has already appeared on the market. Although such systems can achieve enhanced low-end torque and improved transient response, several challenges still exist. An alternative solution to the fixed-ratio positive-displacement supercharger is the V-Charge variable ratio centrifugal supercharger. This technology utilizes a Torotrak continuously variable transmission (CVT) coupled to a centrifugal compressor for near silent boosting. With a wide ratio spread of 10:1 and rapid rate of ratio change, the compressor speed can be set independently of the engine speed to provide an exact boost pressure for the required operating points, without the need to recirculate the air through a bypass valve. A clutch and an active bypass valve can also be eliminated, due to the CVT capability to down-speed, thus improving the noise vibration and harshness performance. This paper will, for the first time, present and discuss the V-Charge technology optimization and experimental validation on a 1.0 L GTDI engine to achieve a better brake specific fuel consumption and transient response over the turbo-only and the fixed-ratio positive-displacement supercharger solution. The potential for the V-Charge system to increase the low-end torque and enable a down-speeding strategy is also discussed.",
keywords = "downsized, gasoline engine, supercharger, V-Charge, variable drive",
author = "Bo Hu and Sam Akehurst and Lewis, {Andrew G.J.} and Pengfei Lu and Darren Millwood and Colin Copeland and Edward Chappell and {De Freitas}, Andrew and James Shawe and Dave Burtt",
year = "2018",
month = "3",
day = "1",
doi = "10.1177/0954407017730464",
language = "English",
volume = "232",
pages = "449--465",
journal = "Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering",
issn = "0954-4070",
publisher = "Sage Publications",
number = "4",

}

TY - JOUR

T1 - Experimental analysis of the V-Charge variable drive supercharger system on a 1.0 L GTDI engine

AU - Hu, Bo

AU - Akehurst, Sam

AU - Lewis, Andrew G.J.

AU - Lu, Pengfei

AU - Millwood, Darren

AU - Copeland, Colin

AU - Chappell, Edward

AU - De Freitas, Andrew

AU - Shawe, James

AU - Burtt, Dave

PY - 2018/3/1

Y1 - 2018/3/1

N2 - A compound charging system that pairs a turbocharger with a supercharger seems to be a potential trend for future passenger car gasoline engines, as the strength of both could be enhanced and the deficiencies of each could be offset. The use of a fixed-ratio positive-displacement supercharger system on a downsized turbocharged gasoline engine has already appeared on the market. Although such systems can achieve enhanced low-end torque and improved transient response, several challenges still exist. An alternative solution to the fixed-ratio positive-displacement supercharger is the V-Charge variable ratio centrifugal supercharger. This technology utilizes a Torotrak continuously variable transmission (CVT) coupled to a centrifugal compressor for near silent boosting. With a wide ratio spread of 10:1 and rapid rate of ratio change, the compressor speed can be set independently of the engine speed to provide an exact boost pressure for the required operating points, without the need to recirculate the air through a bypass valve. A clutch and an active bypass valve can also be eliminated, due to the CVT capability to down-speed, thus improving the noise vibration and harshness performance. This paper will, for the first time, present and discuss the V-Charge technology optimization and experimental validation on a 1.0 L GTDI engine to achieve a better brake specific fuel consumption and transient response over the turbo-only and the fixed-ratio positive-displacement supercharger solution. The potential for the V-Charge system to increase the low-end torque and enable a down-speeding strategy is also discussed.

AB - A compound charging system that pairs a turbocharger with a supercharger seems to be a potential trend for future passenger car gasoline engines, as the strength of both could be enhanced and the deficiencies of each could be offset. The use of a fixed-ratio positive-displacement supercharger system on a downsized turbocharged gasoline engine has already appeared on the market. Although such systems can achieve enhanced low-end torque and improved transient response, several challenges still exist. An alternative solution to the fixed-ratio positive-displacement supercharger is the V-Charge variable ratio centrifugal supercharger. This technology utilizes a Torotrak continuously variable transmission (CVT) coupled to a centrifugal compressor for near silent boosting. With a wide ratio spread of 10:1 and rapid rate of ratio change, the compressor speed can be set independently of the engine speed to provide an exact boost pressure for the required operating points, without the need to recirculate the air through a bypass valve. A clutch and an active bypass valve can also be eliminated, due to the CVT capability to down-speed, thus improving the noise vibration and harshness performance. This paper will, for the first time, present and discuss the V-Charge technology optimization and experimental validation on a 1.0 L GTDI engine to achieve a better brake specific fuel consumption and transient response over the turbo-only and the fixed-ratio positive-displacement supercharger solution. The potential for the V-Charge system to increase the low-end torque and enable a down-speeding strategy is also discussed.

KW - downsized

KW - gasoline engine

KW - supercharger

KW - V-Charge

KW - variable drive

UR - http://www.scopus.com/inward/record.url?scp=85043292678&partnerID=8YFLogxK

U2 - 10.1177/0954407017730464

DO - 10.1177/0954407017730464

M3 - Article

VL - 232

SP - 449

EP - 465

JO - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

JF - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

SN - 0954-4070

IS - 4

ER -