Conditions for optimizing powertrain performance in a vehicle with an internal combustion engine

Michał Janulin

Katedra Budowy, Eksploatacji Pojazdów i Maszyn, Wydział Nauk Technicznych, Uniwersytet Warmińsko-Mazurski w Olsztynie


The paper presents optimization of the drive system in terms of adapting it to the characteristics of another engine. Powertrain parameters in a vehicle with an internal combustion engine were selected based on the following criteria: fuel consumption, engine dynamics, and emission standards for harmful substances. A light-duty passenger vehicle with gross vehicle weight rating (GVWR) of 3.5 tons was modified by replacing a spark-ignition engine with a diesel engine. The gear ratio in the powertrain had to be modified accordingly to optimize the engine’s performance, enhance engine dynamics, minimize fuel consumption and toxic emissions. The optimization of selected parameters of the vehicle driveline was performed based on the requirements of the standard NEDC and WLTC cycles.


optimization, powertrain, gear ratio, vehicle energy efficiency, fuel consumption

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Cited by

Janulin, M. (2021). Conditions for optimizing powertrain performance in a vehicle with an internal combustion engine. Technical Sciences, 23(4), 291–307.

Michał Janulin 
Katedra Budowy, Eksploatacji Pojazdów i Maszyn, Wydział Nauk Technicznych, Uniwersytet Warmińsko-Mazurski w Olsztynie


Copyright (c) 2021 Michał Janulin

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