초록 ▼

A control for an internal combustion engine by pressure ratio management. The ratio of combustion chamber pressure to motored pressure is determined for several predetermined crankshaft rotational angles. These pressure ratios are used to control ignition timing for MBT, diluent gas flow rate (EGR)

A control for an internal combustion engine by pressure ratio management. The ratio of combustion chamber pressure to motored pressure is determined for several predetermined crankshaft rotational angles. These pressure ratios are used to control ignition timing for MBT, diluent gas flow rate (EGR) and fuel balance among combustion chambers. The control requires from three to five pressure samples for each combustion event, depending on sensor and control options. The pressure sensors need not sense absolute pressure if they are linear and do not change gain or bias significantly during one cycle.

대표청구항 ▼

A combustion control for an internal combustion engine of the type having a combustion chamber, a rotating crankshaft, ignition apparatus for the combustion chamber and diluent gas flow control apparatus comprising, in combination: means responsive to combustion chamber pressure to generate signals

A combustion control for an internal combustion engine of the type having a combustion chamber, a rotating crankshaft, ignition apparatus for the combustion chamber and diluent gas flow control apparatus comprising, in combination: means responsive to combustion chamber pressure to generate signals for a combustion event indicating combustion pressure and motored pressure at a predetermined crankshaft rotational angle when combustion is substantially complete; means effective to compute, from the signals, a final pressure ratio of combustion pressure to motored pressure at the predetermined crankshaft rotational angle when combustion is substantially complete; means effective to adjust the diluent flow to maintain the final pressure ratio at a predetermined level, whereby diluent flow is optimally controlled.