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Boost Control with Turbo Speed Sensor and Electric Wastegate
Linköping University, Department of Electrical Engineering, Vehicular Systems.
Linköping University, Department of Electrical Engineering, Vehicular Systems.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

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.

Place, publisher, year, edition, pages
2016. , 103 p.
Keyword [en]
Turbo Speed Sensor, Boost Control, Electric Wastegate
National Category
Control Engineering
URN: urn:nbn:se:liu:diva-129263ISRN: LiTH-ISY-EX--16/4957--SEOAI: diva2:937113
External cooperation
Volvo Car Corporation
Subject / course
Vehicular Systems
Available from: 2016-06-15 Created: 2016-06-15 Last updated: 2016-06-15Bibliographically approved

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16_EX_4597_BL_RH(20007 kB)43 downloads
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Holmbom, RobinLiang, Bohan
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