MITIGATION OF FUEL PRESSURE SPIKES IN A FUEL INJECTOR HAVING INDEPENDENTLY CONTROLLED PRESSURE INTENSIFICATION AND INJECTION

MITIGATION OF FUEL PRESSURE SPIKES IN A FUEL INJECTOR HAVING INDEPENDENTLY CONTROLLED PRESSURE INTENSIFICATION AND INJECTION

A pressure intensifier (64) is controlled by a control valve (ICV 66) to intensify pressure with which fuel is injected from an outlet port (40) of an injection device (20) into an engine cylinder in comparison to that at which fuel is introduced. A controller operates both a needle control valve (N...

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Bibliographische Detailangaben
1. Verfasser: OPPERMANN DEAN ALAN
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
COMBUSTION ENGINES
CONTROLLING COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Zusammenfassung:A pressure intensifier (64) is controlled by a control valve (ICV 66) to intensify pressure with which fuel is injected from an outlet port (40) of an injection device (20) into an engine cylinder in comparison to that at which fuel is introduced. A controller operates both a needle control valve (NCV 54) and the ICY valve during an engine cycle to cause: intensified pressure to be applied to fuel in the injector while the fuel outlet port is closed; then the outlet port to open while intensified pressure continues to be applied as fuel is injected; then while the outlet port remains open and fuel injection continues, the intensified pressure attenuates; then after the intensified pressure has attenuated, the outlet port is re-closed to terminate injection; and then the outlet port is re-opened and the attenuated pressure re-intensified to inject fuel at re-intensified pressure.