Potential application of power output control in the powertrain of a passenger car

Prażnowski, Krzysztof; Mamala, Jarosław; Bieniek, A.

doi:10.1088/1757-899x/421/2/022027

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…This modification contributed to an improvement in engine power and overall efficiency among others was observed in the tested areas of the characteristics. In the work [5] the authors have undertaken an study into the potential to vary the power output of a powertrain system by application of the digital simulation designed with the purpose of improving the power output of powertrain system in a passenger car comprising a multiratio mechanical gearbox. Therefore, depending on the driver's actions and external conditions, the acceleration process is characterized by different values of both total distance-related and specific energy consumption.…”

Section: Vehicle Acceleration Profile and Average Driving Forcementioning

confidence: 99%

“…A 4-stroke single cylinder engine was equipped with an electric actuator and its control system, allowing valvetrain-independent intake valve action. The authors of the study [5] have undertaken an study into the potential to vary the power output of a powertrain system by application of the digital simulation-control designed with the purpose of improving the power output of powertrain system in a passenger car comprising a multi-ratio mechanical gearbox.…”

Section: Vehicle Acceleration Profile and Average Driving Forcementioning

confidence: 99%

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Evaluation of energy consumption in the acceleration process of a passenger car

Mamala¹,

Graba²,

Bieniek³

et al. 2021

Combustion Engines

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The analysis of the vehicle acceleration process is a current topic based on the aspects related to the general characteristics of the car, its parameters, design, drive unit performance, and the influence of external factors. Therfore in the article, the authors assessed the dynamic and energy parameters of the car motion, in which the intensity of acceleration of the car with different intensities was examined. Acceleration was carried out in two variants, the first for a normal internal combustion engine and the second for the same engine but additionally equipped with a short-term boost system. In this way, it influences the increase in power and energy in the car drive system, changing its acceleration intensity. Variable car acceleration intensity was obtained in the range from 0.12 to 1.37 m/s2 , and energy consumption at the level of 0.4 to 1.2 MJ in the distance of 1/4 mile. The article proposes a combination of energy parameters and engine power in order to assess the acceleration dynamics, for this purpose, the specific energy consumption of the car was determined, ranging from 0.35 to 2.0 J/(kg∙m), which was related to the engine power, denoting it with the dynamics index. The study focuses on the assessment of the relationship between the specific energy consumption and acceleration of passenger cars in the available powertrain system using a new dynamics index. The proposed dynamics index combines the energy and dynamic parameters of the car to be able to objectively quantify the acceleration process.

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Section: Vehicle Acceleration Profile and Average Driving Forcementioning

confidence: 99%

Section: Vehicle Acceleration Profile and Average Driving Forcementioning

confidence: 99%

Evaluation of energy consumption in the acceleration process of a passenger car

Mamala¹,

Graba²,

Bieniek³

et al. 2021

Combustion Engines

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“…The author of the dissertation [29] determined the points of highest efficiency for the ICV combustion powertrain for fixed speeds of a Euro 5 car, indicating a speed of about 70 km/h for a diesel engine and 75 km/h for a gasoline engine, respectively. In the work of the author of the dissertation and others [30,31], the effect of different transmission systems was analysed, paying attention to AT (automatic transmission) and MT (manual transmission), where the points of maximum efficiency of the internal combustion powertrain were determined to be 24% at a fixed car speed of about 70 km/h. The author of the work [32] drew attention to the length of the implemented driving profiles, showing an increase in fuel consumption relative to the distance travelled, at the same time paying attention to the losses the combustion engine obtained during winter, increasing fuel consumption by 14%.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Total Unit Energy Consumption of a Car with a Hybrid Drive System in Real Operating Conditions

2021

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The market demand for vehicles with reduced energy consumption, as well as increasingly stringent standards limiting CO2 emissions, are the focus of a large number of research works undertaken in the analysis of the energy consumption of cars in real operating conditions. Taking into account the growing share of hybrid drive units on the automotive market, the aim of the article is to analyse the total unit energy consumption of a car operating in real road conditions, equipped with an advanced hybrid drive system of the PHEV (plug-in hybrid electric vehicles) type. In this paper, special attention has been paid to the total unit energy consumption of a car resulting from the cooperation of the two independent power units, internal combustion and electric. The results obtained for the individual drive units were presented in the form of a new unit index of the car, which allows us to compare the consumption of energy obtained from fuel with the use of electricity supported from the car’s batteries, during journeys in real road conditions. The presented research results indicate a several-fold increase in the total unit energy consumption of a car powered by an internal combustion engine compared to an electric car. The values of the total unit energy consumption of the car in real road conditions for the internal combustion drive are within the range 1.25–2.95 (J/(kg · m)) in relation to the electric drive 0.27–1.1 (J/(kg · m)) in terms of instantaneous values. In terms of average values, the appropriate values for only the combustion engine are 1.54 (J/(kg · m)) and for the electric drive only are 0.45 (J/(kg · m)) which results in the internal combustion engine values being 3.4 times higher than the electric values. It is the combustion of fuel that causes the greatest increase in energy supplied from the drive unit to the car’s propulsion system in the TTW (tank to wheels) system. At the same time this component is responsible for energy losses and CO2 emissions to the environment. The results were analysed to identify the differences between the actual life cycle energy consumption of the hybrid powertrain and the WLTP (Worldwide Harmonized Light-Duty Test Procedure) homologation cycle.

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“…Areas I and II presented in Figure 1 are a derivative of the combustion engine torque's behaviour during the first phase of car acceleration. The problems occurring in area II can be limited by using an electronic throttle control (as shown in Figure 3) which is illustrated in the car's road testing [7], [20], [22]. In this case, the throttle speed in the engine's intake manifold was limited.…”

Section: Introductionmentioning

confidence: 99%

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

Mamala¹,

Prażnowski²,

Kołodziej³

et al. 2021

IJAME

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The powertrain is a very important subassembly in a car and is responsible not only for the automotive industry’s impact on the environment but also for the safety of people travelling by car and performing overtaking manoeuvres and joining traffic. In general, the powertrain is a combination of the drive unit and drive transmission, wherein the drive unit is responsible for the available driving force in the car’s wheels and for the car’s ability to accelerate when the throttle pedal is rapidly pressed at a constant gearbox ratio. The availability of the driving force reserve in the powertrain is the most important issue for the reason of safety of the people travelling by car. In the case of drive unit what they are of the combustion engines, the rapid pressing of the throttle pedal in the car acceleration process leads to a temporary deficiency in the driving force and in the powertrain’s output. The deficiency in the driving force has a negative impact on acceleration and driving comfort. In this paper, the authors assessed and analysed two different short-term compressed air supercharging systems for combustion engines with air supplied from a high-pressure tank. The analysis covered the response of the combustion engine with spark ignition to the gradual increase in pressure in the air-intake system. The assumption is that the applied short-term compressed air supercharging system could improve the driving force during the phase of the engine’s increasing crankshaft rotational speed. This helps to achieve the improved passenger car acceleration dynamics, depending on the supercharging method and throttle pedal exertion. When analysing the car’s acceleration dynamics, expressed by the shorter time of increasing the longitudinal speed from initial to final, it was possible to shorten the acceleration time. It is also possible to observe an improved driving force behaviour, especially during the first phase of acceleration.

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Potential application of power output control in the powertrain of a passenger car

Cited by 3 publications

References 4 publications

Evaluation of energy consumption in the acceleration process of a passenger car

Evaluation of energy consumption in the acceleration process of a passenger car

Analysis of the Total Unit Energy Consumption of a Car with a Hybrid Drive System in Real Operating Conditions

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

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