Transient injection timing control

Details Transient injection timing control Transient injection timing control

F - Mech Eng,Light,Heat,Weapons

02

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341/38.18

F02D 41/40 (2006.01) F02D 41/10 (2006.01) F02D 41/14 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1250641

TRANSIENT INJECTION TIMING CONTROL Abstract of the Disclosure The timing of the injection of fuel to the cylinders of a diesel engine is normally determined in accordance timing values obtained from an empirically derived steady state timing schedule but is modified during transient engine operation by an amount deter- mined in accordance with the cylinder-to-cylinder change in requested fuel amount. In light to moderate engine acceleration, the steady state timing value is modified by a correction amount which serves to retard the start of injection for effecting a reduction in engine noise and exhaust emissions. In periods of heavy engine acceleration, the steady state timing value is modified by a correction amount which serves to advance the start of injection to improve the engine performance. When the cylinder-to-cylinder change in requested fuel quantity indicates a return to substan- tially steady state engine operation, the correction amount is reduced in relation to the correction amount magnitude and the cylinder firing frequency.

508880

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