Parametric Studies of the Impact of Turbocharging on Gasoline Engine Downsizing

Shahed, S. M.; Bauer, Karlheinz

doi:10.4271/2009-01-1472

Cited by 57 publications

(28 citation statements)

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“…Engine fuel consumption has been the focus of significant research effort for a number of years and is encouraging the introduction of, for example, downsized engines e.g [1] , throttleless air systems [2] , new combustion systems as well as new prime movers. The need to reduce fuel consumption is driven by concerns over environmental sustainability and energy security.…”

Section: Introductionmentioning

confidence: 99%

Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance

Williams¹,

Baker²,

Garner³

2011

SAE Technical Paper Series

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The importance of new technologies to improve the performance and fuel economy of internal combustion engines is now widely recognized and is essential to achieve CO 2 emissions targets and energy security. Increased hybridisation, combustion improvements, friction reduction and ancillary developments are all playing an important part in achieving these goals. Turbocharging technology is established in the diesel engine field and will become more prominent as gasoline engine downsizing is more widely introduced to achieve significant fuel economy improvements.The work presented here introduces, for the first time, a new technology that applies conventional turbomachinery hardware to depressurize the exhaust system of almost any internal combustion engine by novel routing of the exhaust gases. The exhaust stroke of the piston is exposed to this low pressure leading to reduced or even reversed pumping losses, offering >5% increased engine torque and up to 5% reduced fuel consumption. This method has the distinct advantage of providing performance and fuel economy improvements without significant changes to the structure of the engine, the combustion system or lubrication system. The Turbo-Discharging concept is introduced and analyzed. A combination of filling/emptying models and 1-D gas dynamic simulations were used to quantify the energy flows and identify optimum valve timings and turbomachine characteristics. 1-D gas dynamic simulation was then used to predict primary fuel economy benefits from TurboDischarging. Secondary benefits, such as extended knock limits are then discussed.

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Section: Introductionmentioning

confidence: 99%

Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance

Williams¹,

Baker²,

Garner³

2011

SAE Technical Paper Series

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show abstract

“…The automotive industry has worked extensively to develop engines that utilize existing fuels (e.g., gasoline), while increasing the engine performance and durability. This development is expected to continue according to future projections, which anticipate a movement towards reducing fuel consumption of SI engines through downsizing and turbocharging (i.e., boosting) [2][3][4]. Downsizing and turbocharging can improve engine thermal efficiency by reducing throttling losses, as the engine will operate mostly at full throttle.…”

Section: Introductionmentioning

confidence: 96%

Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling

AlRamadan

Badra

Javed

et al. 2015

Combustion and Flame

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“…Although recent years have shown a high interest in the reduction of energy consumption and pollutant emissions of ground transportation, internal combustion engines (ICE) are expected to remain the dominant force in the automotive market for decades to come . However, it also needs to be emphasized that several types of electrified vehicles have occurred on the market and in the near future electric vehicles should also have a respectable market share.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of active modular internal combustion engine concept: Targeting efficiency increase and carbon dioxide emissions reduction of gasoline engines

2018

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Summary Today's gasoline engines use a group of new technologies to fulfill emission legislation and at the same time improve fuel consumption with excellent drivability performance and increase specific power and torque output. One technology group focuses on the improvement of efficiency at low loads which includes variable charge motion, variable valve actuation, GDI stratified, and homogenous injection, and the other group shifts the engine operating point towards more efficient operating areas by using super/turbo‐charging, downsizing the engine volume and choosing a longer gear ratio (down‐speeding). This paper provides a theoretical analysis of the proposed active modular internal combustion engine concept (AMICES) which was done for the first time in the literature. AMICES is a specific proposed engine concept with a fully variable load and has compression pressure control on extremely downsized engines as part of an unsynchronized boosting and turbine recuperation system. The AMICES concept in its nature offers constant torque over a full range, high transient response, no pumping losses which increases low load efficiency, and highly efficient in‐cylinder cycle. The cycle was analyzed where it was found that respectable improvement in efficiency could be obtained when compared with conventional gasoline engines (for the considered case, increase in theoretical efficiency was found to be up to 18% which in real operating conditions is expected to be below 10%). Optimization was also performed in order to find optimal cylinder air filling, ie, volumetric efficiency. The main advantages, ie, benefits of the novel proposed concept, were also analyzed, and further possible development steps of the AMICES were introduced. Finally, the proposed concept has potential for favorable implication related to the reduction of gasoline engine fuel consumption and the reduction of harmful CO2 emissions.

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Parametric Studies of the Impact of Turbocharging on Gasoline Engine Downsizing

Cited by 57 publications

References 0 publications

Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance

Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance

Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling

Thermodynamic analysis of active modular internal combustion engine concept: Targeting efficiency increase and carbon dioxide emissions reduction of gasoline engines

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