Control technique for a lean burning engine system

Details Control technique for a lean burning engine system Control technique for a lean burning engine system

1997-07-02

1999-09-07

Ramirez, Nestor

Prime-mover dynamo plants

Electric control

Engine control

123350, 12333919, F11D 1510

Patent

active

059491469

ABSTRACT:
A technique is disclosed for operating an internal combustion engine near the lean burn limit. This technique includes sensing a first characteristic corresponding to a mean effective pressure of the engine and a second characteristic corresponding to fluid pressure in the intake manifold. An engine performance criterion is established as a function of the first and second characteristics. This performance criterion corresponds to an observed emission rate of a pollutant from the engine. A target for the performance criterion is selected which corresponds to lean burn operation of the engine with a limited emission rate of a pollutant. A mixture of air and fuel provided for combustion by the engine is controlled in accordance with the performance criterion and the target. The performance criterion may correspond to: ((BMEP.times.IMT)/IMP). Furthermore, this technique may be applied to lean burning, gaseous-fueled engines configured to drive an electrical power generator.

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