Ellen Bergseth
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View article: Overcoming Challenges in the Transition Towards Battery Electric and Software-Intensive Modular Heavy-Duty Vehicles
Overcoming Challenges in the Transition Towards Battery Electric and Software-Intensive Modular Heavy-Duty Vehicles Open
The automotive industry is undergoing a significant transition, where the development of Battery Electric Vehicles (BEV) and the increasing use of intelligent vehicle functions are transforming vehicles into advanced Cyber-Physical Systems…
View article: Source apportionment of aerosol particle number in background Stockholm: impact of aviation and shipping
Source apportionment of aerosol particle number in background Stockholm: impact of aviation and shipping Open
Ultrafine particles (UFP) have gained increased attention during recent years due to their adverse health effects (WHO, 2021). Both the WHO and the EU have therefore recommended systematic measurements of particle number concentration (PNC…
View article: The Effect of Top-of-Rail Products Incorporating Environmentally Acceptable Solid Particles on Friction, Retentivity, Wear and Airborne Particle Emissions of Wheel–Rail Contact
The Effect of Top-of-Rail Products Incorporating Environmentally Acceptable Solid Particles on Friction, Retentivity, Wear and Airborne Particle Emissions of Wheel–Rail Contact Open
Excessive friction at the wheel–rail contact can limit the lifespan of the wheels and rails. Meanwhile, insufficient friction can lead to increased braking distance, risking safety. Top-of-Rail (TOR) products are recognised for their poten…
View article: A multi-perspective method for gear efficiency and contact analysis
A multi-perspective method for gear efficiency and contact analysis Open
Modern gearing applications, in particular electrification, impose new challenges in many different fields of engineering and research. In specific, new demands are imposed on gears, including higher rotational speed, lower noise acceptanc…
View article: Towards real time automated early gear failure detection
Towards real time automated early gear failure detection Open
The ability to stop a gear fatigue test before catastrophic failure has many advantages. However, today, a widely accepted approach is not available. This case study applies a vibration-based condition monitoring methodology to detect earl…
View article: Gear micropitting initiation of ground and superfinished gears: Wrought versus pressed and sintered steel
Gear micropitting initiation of ground and superfinished gears: Wrought versus pressed and sintered steel Open
This paper investigates the resistance of micropitting on two materials, using an FZG back-to-back test rig with C-PT gears. The materials are wrought steel (16MnCr5) and a commercial powder metallurgical material (Astaloy™ Mo). Two finish…
View article: Study of Surface Roughness on Friction in Rolling/Sliding Contacts: Ball-on-Disc Versus Twin-Disc
Study of Surface Roughness on Friction in Rolling/Sliding Contacts: Ball-on-Disc Versus Twin-Disc Open
Although the efficiency of a gear pair is currently high, a better understanding of surface/lubricant contribution on efficiency is critical. Electrified drivelines will, for example, impose higher speed and alternate loading, and it is ex…
View article: A Wear Detection Parameter for the Wheel–Rail Contact Based on Emitted Noise
A Wear Detection Parameter for the Wheel–Rail Contact Based on Emitted Noise Open
This article describes how a wheel–rail wear detection parameter based on noise was developed by running a rapid transit train instrumented with microphones in a depot with a small curve radius. This full-scale test made use of previous kn…
View article: EXPERIENCES OF STUDYING GEAR TRIBOLOGY IN A FZG TEST SET-UP
EXPERIENCES OF STUDYING GEAR TRIBOLOGY IN A FZG TEST SET-UP Open
The main objective of this study is to review the last decade of experimental work in the field of gear pitting life andefficiency of an FZG gear test rig. Located at KTH Machine Design, the FZG rig has led to critical findings with an imp…
View article: Pin-on-Disc Study of Tribological Performance of Standard and Sintered Gear Materials Treated with Triboconditioning Process: Pretreatment by Pressure-Induced Tribofilm Formation
Pin-on-Disc Study of Tribological Performance of Standard and Sintered Gear Materials Treated with Triboconditioning Process: Pretreatment by Pressure-Induced Tribofilm Formation Open
oating is one of the innovative approaches used to improve the wear resistance and load-carrying capacity of surfaces in rolling-sliding contact, such as gears and rolling element bearings. In this study, the tribological performance of st…
View article: Investigation of pitting resistance in ultra clean IQ-Steel vs commonly used conventional steel; 158Q vs 16MnCr5 : Back-to-back pitting tests
Investigation of pitting resistance in ultra clean IQ-Steel vs commonly used conventional steel; 158Q vs 16MnCr5 : Back-to-back pitting tests Open
KTH Machine Design has conducted pitting tests on gears made out of two different types of steel in a standard back-to-back pitting test rig (FZG). The tested gears were produced from Ovako’s IQ-Steel in grade 158Q and compared to the beha…
View article: Development of a noise related track maintenance tool
Development of a noise related track maintenance tool Open
The purpose of this work-package within the Quiet-track, FP7, is to develop a noise related track maintenance tool, in the form of an on-board measurement system. As a first step, lab scale tests using a pin-on-disc tribometer were used in…