Transient injection timing control

Details Transient injection timing control Transient injection timing control

1985-06-24

1986-06-24

Greenlief, Magdalen Y. C.

Internal-combustion engines

Charge forming device

With fuel pump

F02M 5920

Patent

active

045962219

ABSTRACT:
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 determined 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 substantially steady state engine operation, the correction amount is reduced in relation to the correction amount magnitude and the cylinder firing frequency.

REFERENCES:
patent: 4351283 (1982-09-01), Ament
patent: 4368705 (1983-01-01), Stevenson et al.
patent: 4388909 (1983-06-01), Ogasawara et al.
patent: 4450817 (1984-05-01), Wuki et al.
patent: 4503830 (1985-03-01), Nakamura et al.
Murayama et al., SAE Paper No. 800966, "Combustion Behaviors Under Accelerating Operation of an IDI Diesel Engine", 1980.
Trenne et al., SAE Paper No. 820,447, "Closed Loop Design for Electronic Diesel Injection Systems".
Reams et al., SAE Paper No. 820,449, "Capabilities of Diesel Electronic Fuel Control".
MTZ Motortechnische Zeitschrift 36 (1975) 4, pp. 111-115, "Beitrag zum Emissionsverhalten von Dieselmotoren bei Instationarem Betrieb".

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