DownloadComponent[2].pdf (342.17 kB)
Download fileQuasi-constant volume (QCV) spark ignition combustion
conference contribution
posted on 2011-05-26, 11:06 authored by Rui Chen, Edward WinwardEdward Winward, Paul Stewart, Ben Taylor, Dan GladwinThe Otto cycle delivers theoretical maximum thermal
efficiency. The traditional design of internal combustion
engines using a simple slide-crank mechanism gives no
time for a constant volume combustion which
significantly reduces the cycle efficiency. In this study,
using a high torque, high bandwidth, permanent magnet
electric drive system attached to the crankshaft, variable
angular velocities of the engine crankshaft were
implemented. The system enabled reductions in piston
velocity around the top dead centre region to a fraction
of its value at constant crankshaft angular velocity
typical in conventional engines. A quasi-constant volume
combustion has thus been successfully achieved,
leading to improvements in engine fuel consumption and
power output which are discussed in detail.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering