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Comparison of the instantaneous fuel consumption of vehicles with a different type of propulsion system at constant velocity

Gołębiewski W., Stoeck T.

Journal of KONES

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2014

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Vol. 21, No. 3

113--120

EN

The paper presents a comparative analysis of the instantaneous fuel consumption of a FIAT Panda vehicle equipped with a 1.3 JTD MultiJet compression ignition engine with Common Rail fuel system. Different types of propulsion system were taken into consideration (engine positioned front-lengthwise to the direction of travel and rear-wheel drive, engine positioned front-transversely to the direction of travel and front-wheel drive, and all-wheel drive). The method for determining the instantaneous fuel consumption was based on an experimental part where the load characteristics were established (relationship between specific fuel consumption and engine torque). It was carried out for the steady states of these parameters corresponding to specific traffic conditions that represent the resistance to motion, i.e. rolling resistance and air resistance. Technical and operating characteristics of a vehicle and its design features, such as maximum weight, transmission system ratios, dynamic wheel radius, drag coefficient, width and height, and efficiency of propulsion system, had a significant impact on their individual contribution. The efficiency of transmission was adopted from a simulation for different types of propulsion system. It was important in determination of the value of instantaneous fuel consumption for constant vehicle velocities used in the UDC test (Urban Driving Cycle – subtest of the EUDC cycle). The lowest fuel consumption for a given speed of a car occurred for the front-wheel drive transmission system, whereas the highest for the all-wheel drive system (4x4).

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Comparative analysis of the instantaneous fuel consumption of a car with different type of power train system under transient conditions

Gołębiewski W., Prajwowski K.

Journal of KONES

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2014

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Vol. 21, No. 1

83--90

EN

The aim of this study was to compare instantaneous fuel consumption of a FIAT Panda car with three types of propulsion system applied: engine positioned front-lengthwise to the direction of travel and rear-wheel drive, engine positioned front-transversely to the direction of travel and front - wheel drive and all-wheel drive. The vehicle was equipped with a 1.3 JTD MultiJet compression-ignition engine being used for conducting experimental tests. This part was based on making the load characteristics (relationship between specific fuel consumption and engine torque) using engine dynamometer. This was made for given parameters corresponding to specific traffic conditions. They were determined in a simulation and were represented by rolling resistance and air resistance. Their value was affected by vehicle technical and operating characteristics and its design features, such as maximum weight, transmission system ratios, dynamic wheel radius, drag coefficient, width and height, and efficiency of propulsion system. The efficiency of power train system was adopted from a simulation conducted for different types of propulsion system. Apart from basic resistance, additional drag (inertia resistance) was the most important in vehicle energy balance. It played an important role in determining the value of instantaneous fuel consumption for variable velocity and constant acceleration values used in the UDC test (Urban Driving Cycle – subtest of the EUDC cycle). The lowest fuel consumption for a given car velocity was for front-wheel drive transmission system, whereas the highest for allwheel drive system (4x4).

3

Funkcjonalność komputerów pokładowych stosowanych we współczesnych samochodach

Styła S.

Przegląd Elektrotechniczny

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2010

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R. 86, nr 7

215-217

PL

Chwilowe, całkowite i średnie zużycie paliwa oraz spodziewany zasięg pojazdu na pozostającym aktualnie w zbiorniku paliwie są informacjami wpływającymi na komfort podróżowania współczesnymi samochodami. W artykule zostały opisane metody pomiaru i sposoby wyznaczania wybranych funkcji realizowanych przez komputery pokładowe instalowane w pojazdach samochodowych. Przeprowadzono analizę możliwości komputerów pokładowych oraz przedstawiono sposoby poprawy dokładności wyświetlanych na pulpicie informacji.

EN

Instantaneous, total and average fuel consumption and anticipated vehicle range at actual fuel remaining in the fuel tank constitute the data affecting the travel comfort in contemporary vehicles. The present article describes the methods of measurement and the methods of determination of selected functions performed by trip computers installed in motor vehicles. The analysis of trip computers capabilities has been carried out and the methods proposed to improve the accuracy of data displayed on the panel have been presented.