Development of High Speed Motor and Inverter for Electric Supercharger

Nishiwaki, Kazuhiro; Iezawa, Masahiro; Tanaka, Hideyuki; Goto, Takashi; An, Byeongil

doi:10.4271/2013-01-0931

Cited by 10 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the electric power that is required for the e-booster operation can be covered by the regenerative energy. Finally, the results of the simulation have shown a significant improvement in the transient response at low engine speeds [85].…”

Section: Electric Superchargermentioning

confidence: 86%

“…However, some automobile makers have been considered to use a 48V battery. According to a simulation that was conducted by Nishiwaki et al [85] for a 48V battery system, the regenerative electric power and the motor power were risen as the boosting pressure was increased. This was due to the higher power produced by Ricardo et al [79] stated that investigation on the electrically assisted turbochargers is needed as they are beneficial to eliminate the turbo-lag.…”

Section: Electric Superchargermentioning

confidence: 99%

“…In a recent paper by Nishiwaki et al [85], the topology in Figure 14e is referred to as a two-stage turbocharger system. In addition, in the paper, a TEDC system on a 1.5-litre gasoline engine was examined by GT-Power, an engine simulation tool, and engine bench test.…”

Section: Turbocharger With An Additional Electrically Driven Compressmentioning

confidence: 99%

“…In addition, in the paper, a TEDC system on a 1.5-litre gasoline engine was examined by GT-Power, an engine simulation tool, and engine bench test. Results obtained by Nishiwaki et al [85] suggest that the TEDC system's response time at 1500 rpm was improved by 43%, compared with a normal two-stage turbocharger.…”

Section: Turbocharger With An Additional Electrically Driven Compressmentioning

confidence: 99%

See 3 more Smart Citations

Electric Boosting and Energy Recovery Systems for Engine Downsizing

Alshammari

Pesyridis

2019

Energies

View full text Add to dashboard Cite

Due to the increasing demand for better fuel economy and increasingly stringent emissions regulations, engine manufacturers have paid attention towards engine downsizing as the most suitable technology to meet these requirements. This study sheds light on the technology currently available or under development that enables engine downsizing in passenger cars. Pros and cons, and any recently published literature of these systems, will be considered. The study clearly shows that no certain boosting method is superior. Selection of the best boosting method depends largely on the application and complexity of the system.

show abstract

Section: Electric Superchargermentioning

confidence: 86%

Section: Electric Superchargermentioning

confidence: 99%

Section: Turbocharger With An Additional Electrically Driven Compressmentioning

confidence: 99%

Section: Turbocharger With An Additional Electrically Driven Compressmentioning

confidence: 99%

See 2 more Smart Citations

Electric Boosting and Energy Recovery Systems for Engine Downsizing

Alshammari

Pesyridis

2019

Energies

View full text Add to dashboard Cite

show abstract

“…However, some automobile makers have been considering the use of 48 V architectures to enhance the goal of improving the transient response for a considerable time in order to accommodate mild-hybridization requirements. According to a simulation that was conducted by Nishiwaki et al [28] for a 48 V battery system and compared against an equivalent 12 V architecture, the simulation has shown a significant improvement in the transient response at low engine speeds (0.4 s to reach a target 1.65 pressure ratio against 1.0 s for the 12 V system).…”

Section: Motor/generator Specificationsmentioning

confidence: 99%

Modelling of Electrically-Assisted Turbocharger Compressor Performance

2019

View full text Add to dashboard Cite

For the purposes of design of a turbocharger centrifugal compressor, a one-dimensional modelling method has been developed and applied specifically to electrically-assisted turbochargers (EAT). For this purpose, a mix of authoritative loss models was applied to determine the compressor losses. Furthermore, an engine equipped with an electrically-assisted turbocharger was modelled using commercial engine simulation software (GT-Power) to assess the performance of the engine equipped with the designed compressor. A commercial 1.5 L gasoline, in-line, 3-cylinder engine was selected for modeling. In addition, the simulations have been performed for an engine speed range between 1000 and 5000 rpm. The design target was an electric turbocharger compressor that could meet the boosting requirements of the engine with noticeable improvement in a transient response. The results from the simulations indicated that the EAT improved the overall performance of the engine when compared to the equivalent conventional turbocharged engine model. Moreover, the electrically-assisted turbochargers (EAT) equipped engine with power outputs of 1 kW and 5 kW EAT was increased by an average of 5.96% and 15.4%, respectively. This ranged from 1000 rpm to 3000 rpm engine speed. For the EAT model of 1 kW and 5 kW, the overall net reduction of the BSFC was 0.53% and 1.45%, respectively, from the initial baseline engine model.

show abstract

The thermodynamic analysis of an electrically supercharged Miller Cycle gasoline engine with early intake valve closing

et al. 2019

View full text Add to dashboard Cite

Electric superchargers are able to improve the thermodynamic process of gasoline engines by selfadapting running state to dominate intake air in all operation conditions. This paper proposes a novel approach for electrically supercharged Miller Cycle with early intake valve closing based on thermodynamics to settle the fuel economy problem of gasoline engines at low load operations by taking advantages of the domination of electric superchargers to intake air. Electrically supercharged Miller Cycle with early intake valve closing was realized by matching an electric supercharger, redesigning the inlet cam, and setting the intake valves closing before bottom dead center while keeping intake valves opening constant. An over-expanded engine cycle is attempted to be used to promote thermal efficiency by increasing geometric compression ratio, in addition to maintaining the effective compression ratio. Here, it has been attempted to systematically analyze the law of the energy losses of the electrically supercharged Miller Cycle gasoline engine with early intake valve closing using a reliable thermodynamic model from the perspective of heat engine. The results indicate that electrically supercharged Miller Cycle with early intake valve closing could improve the thermal efficiency of gasoline engines by significantly decreasing the pumping and exhaust losses.

show abstract

Development of High Speed Motor and Inverter for Electric Supercharger

Cited by 10 publications

References 2 publications

Electric Boosting and Energy Recovery Systems for Engine Downsizing

Electric Boosting and Energy Recovery Systems for Engine Downsizing

Modelling of Electrically-Assisted Turbocharger Compressor Performance

The thermodynamic analysis of an electrically supercharged Miller Cycle gasoline engine with early intake valve closing

Contact Info

Product

Resources

About