Analysis of turbocharging pressure in an internal combustion engine using short-term turbocharging

Szymon Kołodziej and Jarosław Mamala

Applied Energy, 2025, vol. 382, issue C, No S0306261925000431

Abstract: Vehicle acceleration is an ever-present topic based on many aspects related to the safety, economy or ecology of driving. It depends on the vehicle's overall characteristics related to its performance, design, engine type and also on the impact that given environmental conditions have on the vehicle. As a result, there is still a great need to analyse the acceleration process and energy consumption of drive trains, as these are dynamic states of motion associated with the acceleration of mass throughout the car, as well as masses accelerated due to the vehicle drive train's rotating motion. The resulting inertia of the vehicle's masses during acceleration leads to a lack of driving force on the wheels, which requires additional torque to be supplied from the drive unit to improve the vehicle's dynamics. Turbocharging an internal combustion engine using a turbocharger, with a simultaneous reduction of the engine's cubic capacity, is a common method used in the automotive industry to improve the vehicle's dynamics. The short-term turbocharger system is a new solution that not only solves the shortcomings associated with the turbocharger's design, i.e. the so-called turbo-lag, but also allows for higher dynamics in the vehicle's acceleration process. The additional turbocharging pressure build-up in the combustion engine's intake system is achieved by supplying compressed air from the tank to turbine blades in the turbocharger's housing. The turbocharger was modernised as part of internal research and laboratory tests were conducted on a custom bench in order to determine the usefulness of the proposed solution and assess the short-term turbocharger system's operating parameters. Bench tests were then carried out on a vehicle with a short-term turbocharger system equipped with a modernised turbocharger, involving a test of acceleration flexibility with different intensities. The study shows that the applied changes improve the vehicle's traction parameters. The acceleration process from 45 km/h to 120 km/h reduced the acceleration times by up to 11.8 % for low throttle lifts in the intake manifold.

Keywords: Combustion engine; Turbocharging; Short-term supercharging; Vehicle acceleration; Boost pressure (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.apenergy.2025.125313

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