Boost Control with Turbo Speed Sensor and Electric Wastegate

The purpose of this master thesis is to investigate the possibility to refine the control system of turbochargers in petrol engines by introducing turbo speed measurement. This thesis also investigates possible control enhancement from an electric wastegate actuator compared with a traditional pneum...

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Main Authors: Holmbom, Robin, Liang, Bohan
Format: Others
Language:English
Published: Linköpings universitet, Fordonssystem 2016
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129263
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spelling ndltd-UPSALLA1-oai-DiVA.org-liu-1292632016-06-16T05:05:04ZBoost Control with Turbo Speed Sensor and Electric WastegateengHolmbom, RobinLiang, BohanLinköpings universitet, FordonssystemLinköpings universitet, Fordonssystem2016Turbo Speed SensorBoost ControlElectric WastegateThe purpose of this master thesis is to investigate the possibility to refine the control system of turbochargers in petrol engines by introducing turbo speed measurement. This thesis also investigates possible control enhancement from an electric wastegate actuator compared with a traditional pneumatic actuator. During the thesis work the control problem is divided into 3 sub systems: boost pressure controller, turbo speed controller, and electric actuator controller. The design procedure of the controllers follows model-based method in which a simulation model for engine and a simulation model for electric actuator are used. The designed controller is then implemented and evaluated in an engine test cell. The result of the thesis work shows that the electric wastegate actuator is preferred as it delivers consistent actuation speed and accurate positioning which favours model-based design that requires exact wastegate position. Although the purposed controller structure that uses turbo speed measurement cannot yet achieve faster generation of boost pressure by the end of the thesis work, the use of turbo speed sensor as controller feedback still shows potential to enhance the boost controller and ease the controller design, as the turbo speed measurement can reflect the boost pressure faster and is less sensitive to the disturbances in the air flow. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129263application/pdfinfo:eu-repo/semantics/openAccess
collection NDLTD
language English
format Others
sources NDLTD
topic Turbo Speed Sensor
Boost Control
Electric Wastegate
spellingShingle Turbo Speed Sensor
Boost Control
Electric Wastegate
Holmbom, Robin
Liang, Bohan
Boost Control with Turbo Speed Sensor and Electric Wastegate
description The purpose of this master thesis is to investigate the possibility to refine the control system of turbochargers in petrol engines by introducing turbo speed measurement. This thesis also investigates possible control enhancement from an electric wastegate actuator compared with a traditional pneumatic actuator. During the thesis work the control problem is divided into 3 sub systems: boost pressure controller, turbo speed controller, and electric actuator controller. The design procedure of the controllers follows model-based method in which a simulation model for engine and a simulation model for electric actuator are used. The designed controller is then implemented and evaluated in an engine test cell. The result of the thesis work shows that the electric wastegate actuator is preferred as it delivers consistent actuation speed and accurate positioning which favours model-based design that requires exact wastegate position. Although the purposed controller structure that uses turbo speed measurement cannot yet achieve faster generation of boost pressure by the end of the thesis work, the use of turbo speed sensor as controller feedback still shows potential to enhance the boost controller and ease the controller design, as the turbo speed measurement can reflect the boost pressure faster and is less sensitive to the disturbances in the air flow.
author Holmbom, Robin
Liang, Bohan
author_facet Holmbom, Robin
Liang, Bohan
author_sort Holmbom, Robin
title Boost Control with Turbo Speed Sensor and Electric Wastegate
title_short Boost Control with Turbo Speed Sensor and Electric Wastegate
title_full Boost Control with Turbo Speed Sensor and Electric Wastegate
title_fullStr Boost Control with Turbo Speed Sensor and Electric Wastegate
title_full_unstemmed Boost Control with Turbo Speed Sensor and Electric Wastegate
title_sort boost control with turbo speed sensor and electric wastegate
publisher Linköpings universitet, Fordonssystem
publishDate 2016
url http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129263
work_keys_str_mv AT holmbomrobin boostcontrolwithturbospeedsensorandelectricwastegate
AT liangbohan boostcontrolwithturbospeedsensorandelectricwastegate
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