Engine Control Using Torque Estimation

Active torsional vibration control of reciprocating engines

“…Klenk, Moser, Mueller, & Wimmer, 1993;Azzoni et al, 1995;Williams, 1996), and subsequently for detecting and isolating nonuniform cylinder contributions and estimation of cylinderwise torque contributions (e.g. Kiencke & Nielsen, 2005; Taraza et al, 1998;Moskwa & Wang, 2000;Straky, 1997;Lee et al, 2001). As the automotive industry is very sensitive to additional costs all methods proposed in the literature are based on using the existing speed pickup, without introducing any additional sensors.…”

Real-time brake torque estimation for internal combustion engines

“…Proposed is a real-time methodology similar to [24] which correlates engine brake torque to crankshaft angular velocity information. This investigation considers both steady-state and transient conditions, and proposes an estimation model that can be executed in real-time.…”

“…Two different torque estimation schemes were presented in [24] entitled ''Stochastic Analysis'' and ''Frequency Analysis'' (also in US patent [25]). The first method consists of using a least-squares approach to statistically correlated variables.…”

HCCI control

“…Reconstruction of crank shaft torque and cylinder pressure based on measurement of engine speed fluctuation has been performed (Lee et al, 2001). With net crank shaft torque is here meant the crank shaft torque in excess of what is needed to maintain a constant engine speed.…”