Use of 1D Simulations in Natural Gas Vehicle Development

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00365023" target="_blank" >RIV/68407700:21220/22:00365023 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Use of 1D Simulations in Natural Gas Vehicle Development

Popis výsledku v původním jazyce

The lecture describes selected modeling studies using a 1-D model, supporting the development of a passenger van with excellent performance dedicated to demonstrating achievable performance in the next generation of natural gas-fueled vehicles. The model was calibrated and validated by experimental data. Investigations were carried out on a four-cylinder engine with 1.6 L displacement with spark ignition and direct injection. The engine was optimized for monofuel operation with compressed natural gas. Various strategies on how to achieve a high load at low engine speed were investigated. The author proposed a single-stage turbocharger to cover the demand for high torque at low engine speed and high power at full speed, with boost levels comparable to a dual-stage turbocharging. Single stage turbocharging was concluded to allow the engine to operate with a maximum specific torque of 240 Nm/dm3 between 1500 and a 2750 rpm and maximum specific power output of 78kW/dm3. The maximum engine speed had to be limited to a similar value that is usually applied in a diesel engine because of the limited control range of turbocharging. The second part is focused on a 1-D dynamic simulation in a driving cycle. Optimization of the basic engine parameters is provided in a steady state operation, and a control adjustment is applied to a dynamic vehicle model for a transient response improvement in highly dynamic operation modes of the WLTC (world-harmonised light-duty test cycle). The model was further supplemented by models of temperature-dependent friction losses and catalyst heating. The vehicle simulation model with an optimized control system was used to predict fuel consumption and specific CO2 emissions in driving cycles. The results of simulations of specific CO2 emissions were compared with the CO2 emissions of the base diesel engine.

Název v anglickém jazyce

Use of 1D Simulations in Natural Gas Vehicle Development

Popis výsledku anglicky

The lecture describes selected modeling studies using a 1-D model, supporting the development of a passenger van with excellent performance dedicated to demonstrating achievable performance in the next generation of natural gas-fueled vehicles. The model was calibrated and validated by experimental data. Investigations were carried out on a four-cylinder engine with 1.6 L displacement with spark ignition and direct injection. The engine was optimized for monofuel operation with compressed natural gas. Various strategies on how to achieve a high load at low engine speed were investigated. The author proposed a single-stage turbocharger to cover the demand for high torque at low engine speed and high power at full speed, with boost levels comparable to a dual-stage turbocharging. Single stage turbocharging was concluded to allow the engine to operate with a maximum specific torque of 240 Nm/dm3 between 1500 and a 2750 rpm and maximum specific power output of 78kW/dm3. The maximum engine speed had to be limited to a similar value that is usually applied in a diesel engine because of the limited control range of turbocharging. The second part is focused on a 1-D dynamic simulation in a driving cycle. Optimization of the basic engine parameters is provided in a steady state operation, and a control adjustment is applied to a dynamic vehicle model for a transient response improvement in highly dynamic operation modes of the WLTC (world-harmonised light-duty test cycle). The model was further supplemented by models of temperature-dependent friction losses and catalyst heating. The vehicle simulation model with an optimized control system was used to predict fuel consumption and specific CO2 emissions in driving cycles. The results of simulations of specific CO2 emissions were compared with the CO2 emissions of the base diesel engine.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

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Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů