Trends in the development of turbocharging systems in automotive vehicles

Danilecki, K.

doi:10.19206/ce-117248

Cited by 2 publications

(1 citation statement)

References 4 publications

(10 reference statements)

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“…A good example of this phenomenon is a three-cylinder engine developed by Mahle company, with the capacity of 1.2 l, power of 144 kW, torque of 287 Nm and reduced emissions by 30%. With traditional design solutions, such performance would be provided by a 2,4 l [5,6] engine. The development [14] of turbocharging systems forced the development of their regulation systems.…”

Section: Operational Damages To the Electromechanical Turbocharger Po...mentioning

confidence: 99%

Selected Issues on the Operation of the Internal Combustion Engine Turbocharger

Lotko¹,

Lechowski²

2020

Adv. Sci. Technol. Res. J.

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A combustion engine turbocharger works in most difficult conditions due to high temperatures of the fuels it is driven by, vibrations and high rotational speeds of its shaft up to 200 thousand rpm. In addition, under these conditions, there are difficulties with lubrication of the blade axes. Thus, the combustion engine turbocharger is exposed to the damages occurring during the engine operation process. The frequency of damages was determined on the basis of tests for a selected group of vehicles. The object of detailed author's own research was the Audi 3.0 V6 TDI engine of the Audi A6 C6 car which cooperated with a Borg Warner turbocharger with a variable angle of turbine steering wheel blades. These positioners are also exposed to adverse conditions: mainly vibrations and high temperatures. They are subjected to frequent damages, which often affect the engine control parameters. An analysis of the positioner element damage as well as a group of testers to assess their technical condition was made. The evaluated testers were allowed only to determine the efficiency of the turbocharger, but without indicating its technical condition or its positioner separately. Consequently, the author's own research methodology and the construction of a new tester for the electromechanical turbocharger adjuster was developed. The necessary tests for the vehicle mileage up to 350,000 km were carried out. The self-designed tester can also estimate the degree of electromechanical wear of the positioner in the engine supercharging system as well as the resistance of its movements resulting from the pollution of the VTG turbocharger mechanism with the turbine steering wheel positioner, with variable geometrical parameters.

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Section: Operational Damages To the Electromechanical Turbocharger Po...mentioning

confidence: 99%

Selected Issues on the Operation of the Internal Combustion Engine Turbocharger

Lotko¹,

Lechowski²

2020

Adv. Sci. Technol. Res. J.

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Rebuilding of Turbocharger Shafts by Hardfacing

2022

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This paper presents the results of structural tests and hardness measurements of rebuilding coatings manually applied by the gas tungsten arc welding (GTAW) method on damaged surfaces of steel shafts of turbochargers of automotive engines. Single- and double-layer coatings were applied in an argon atmosphere by fusing a 1.2 mm diameter wire with a Fluxofil M58 flux core, using a current of 35A and an arc voltage of 8–9 V. The hardfacing resulted in coatings with a martensitic–bainitic structure with fine dispersed carbides rich in M23C6-type chromium. The hardness of the coatings on the rebuilt shafts averaged from about 740HV5 for the single-layer coating to about 770HV5 for the double-layer coating and was two times higher than the hardness of the tempered shafts without coatings.

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Trends in the development of turbocharging systems in automotive vehicles

Cited by 2 publications

References 4 publications

Selected Issues on the Operation of the Internal Combustion Engine Turbocharger

Selected Issues on the Operation of the Internal Combustion Engine Turbocharger

Rebuilding of Turbocharger Shafts by Hardfacing

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