The Potential of Electric Exhaust Gas Turbocharging for HD Diesel Engines

Millo, Federico; Mallamo, Fabio; Pautasso, E.; Mego, G. Ganio

doi:10.4271/2006-01-0437

Cited by 61 publications

(42 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Engine drivability data for both acceleration and driving cycle performance were provided by Millo et al (2006), who simulated the operation of a motor-generator electrically assisted turbocharging system (incorporating an asynchronous EM, DC-DC converter, super capacitors, and control system) for a heavy-duty diesel engine. The electrically assisted turbocharged vehicle was capable of reducing the time up to the desired boost pressure and turbocharger speed by 25% compared to the VGT engine for a typical acceleration event.…”

Section: Electrically Assisted Turbochargingmentioning

confidence: 99%

Review of Some Methods for Improving Transient Response in Automotive Diesel Engines through Various Turbocharging Configurations

Giakoumis

2016

Front. Mech. Eng.

View full text Add to dashboard Cite

Turbocharged diesel engines suffer from worse transient performance than their naturally aspirated counterparts, mostly at low loads and speeds. This leads to overshoot in engine-out exhaust emissions (primarily particulate matter/soot and NOx) after a speed or load increase, as well as poor drivability. The main cause for this problematic behavior is located in the turbocharger in the form of high moment of inertia and unfavorable aerodynamic-type compressor flow characteristics. In the present work, various alternative turbocharging configurations are reviewed that have proven successful in improving the dynamic diesel engine operation. These configurations are combined supercharging, variable-geometry turbine, electrically assisted turbocharging, two-stage series and sequential turbocharging, and lower turbine moment of inertia. Significant improvement in the engine's transient response can be realized when designing for smaller turbocharger frames or applying more than one units (in series or parallel arrangement). Increasing the available turbine torque (e.g., through elevated turbine back pressure in a variable-geometry turbine) is another successful option, as well as enhancement of the boost pressure (e.g., through the use of a positive displacement compressor upstream of the turbocharger). Finally, the use of external energy (e.g., in the form of electrical assistance on the turbocharger shaft during the critical turbocharger-lag phase) is another recently developed and highly promising measure to mitigate the drawbacks of the poor transient performance of turbocharged diesel-engined vehicles and limit their exhaust emissions. The choice of the "best" configuration for a specific application depends on many parameters, such as cost, matching procedure, control system, and mainly type of engine and drive cycle of the vehicle.

show abstract

Section: Electrically Assisted Turbochargingmentioning

confidence: 99%

Review of Some Methods for Improving Transient Response in Automotive Diesel Engines through Various Turbocharging Configurations

Giakoumis

2016

Front. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…It is not only able to improve the engine transient response but also has ability to harvest exhaust energy when it is operated at generating mode (Terdich et al, 2013). Simulation work shows that by using ETA, an urban bus can save up to 6.4% fuel consumption together with lower CO2 emissions for a typical vehicle driving cycle (Millo et al, 2006). Electric Turbocompound (ETC) is an another name for EAT and is often associated with the feedback of recovered energy to the engine or storage device such as shaft motor, supercapacitor, and battery (Hopman et al, 2005;Algrain, 2005;Millo et al, 2006;Arise et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Simulation work shows that by using ETA, an urban bus can save up to 6.4% fuel consumption together with lower CO2 emissions for a typical vehicle driving cycle (Millo et al, 2006). Electric Turbocompound (ETC) is an another name for EAT and is often associated with the feedback of recovered energy to the engine or storage device such as shaft motor, supercapacitor, and battery (Hopman et al, 2005;Algrain, 2005;Millo et al, 2006;Arise et al, 2014). The other attractive benefit of ETC is that it is no longer necessary to use a wastegate or a VGT (Hopman et al, 2005;Millo et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Three-Input-Three-Output Air Path Control System of a Heavy-Duty Diesel Engine

et al. 2016

View full text Add to dashboard Cite

“…In [6] and [7], the improvements to the engine transient response using an electrified turbocharger were investigated from experimental and theoretical aspects respectively. Stepping further, [8] and [9] evaluated the potential of an electrified turbocharger in both turbo-lag reduction and fuel consumption saving. Experimental investigations into the efficiency characterization of an electrified turbocharger through experiments with a heavy duty diesel engine have been made in [10], [11].…”

Section: Introductionmentioning

confidence: 99%