Browse Publications Technical Papers 2003-01-0712
2003-03-03

Mechatronic Solution for Electronic Turbocharger 2003-01-0712

An innovative way of lowering engine fuel consumption is to reduce engine displacement. However, smaller engines featuring reduced swept volume typically exhibit insufficient torque at low engine speeds. Conventional exhaust turbochargers are not able to compensate for this behavior and additionally suffer from the familiar turbo lag. One possible solution may be an electrically assisted turbocharger, with a high-speed motor providing the extra boost at low engine speeds.
A critical factor for the efficiency of the concept is the ratio of the electric motor torque and the rotational mass inertia of the rotor. Testbench evaluation shows acceleration times of 0.5 seconds to reach speeds up to 70,000 rpm. Typically, the electrical load of such systems goes up to 3 kW. Target motors are various types of electrically commutated motors such as BLDC, switched reluctance or induction motors.
This paper describes a system solution for controlling high-dynamic motors like the one used for the electrically assisted exhaust turbocharger (e-turbo). It presents the strengths and the limits of the solution.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Transient response of a Turbocharged SI Engine with an electrical boost pressure supply

2003-01-1844

View Details

TECHNICAL PAPER

Computational Study of Diesel Engine Downsizing Using Two-StageTurbocharging

2004-01-0929

View Details

TECHNICAL PAPER

Diesel Engine Electric Turbo Compound Technology

2003-01-2294

View Details

X