The control strategies of auto-ignition for homogeneous charge compression ignition and controlled auto ignition operations were investigated using a simple engine model. The fluctuations of auto-ignition characteristics during transients in variable timing of exhaust and intake valves were analyzed. When the valve timing changed stepwise, the characteristics fluctuated and differed slightly from these in steady state conditions because combustion in the prior cycle affected the gas exchange in the next cycle. To reduce such fluctuations, the control strategies of cylinder air mass, residual gas mass, fuel mass, air/fuel ratio were investigated for a simple engine dynamic model (a 4-cylinder, 4-stroke engine with total cylinder stroke volume of 2000 cm3), which could simulate the dynamics of gas exchange during transient valve timing in a wide dynamic range.
Simultaneous Control of Air/fuel Ratio and Intake, Exhaust Valve Timing for HCCI Operation
Sae Technical Papers
SAE 2003 World Congress & Exhibition ; 2003
03.03.2003
Aufsatz (Konferenz)
Englisch
Simultaneous control of air/fuel ratio and intake, exhaust valve timing for HCCI operation
Kraftfahrwesen | 2003
|British Library Conference Proceedings | 2004
|SAE Technical Papers | 2004
|Transient control of HCCI through combined intake and exhaust valve actuation
Kraftfahrwesen | 2003
|Transient Control of HCCI Through Combined Intake and Exhaust Valve Actuation
SAE Technical Papers | 2003
|