System and method for preventing exhaust gases from entering an intake manifold of an engine

System and method for preventing exhaust gases from entering an intake manifold of an engine

A control system 14 and method for preventing exhaust gases from entering an intake manifold 26 of an engine 21 after engine shutdown is provided. The engine 12 includes a valve controlling air flow into the intake manifold 26. The method includes determining when the engine 12 has been shutdown. Th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MAUSOLF THOMAS FRANCIS, PAGE FREDERICK ALLAN
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
COMBUSTION ENGINES
COMBUSTION ENGINES IN GENERAL
CONTROLLING COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INTERNAL-COMBUSTION PISTON ENGINES
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Beschreibung
Zusammenfassung:A control system 14 and method for preventing exhaust gases from entering an intake manifold 26 of an engine 21 after engine shutdown is provided. The engine 12 includes a valve controlling air flow into the intake manifold 26. The method includes determining when the engine 12 has been shutdown. The method further includes opening the valve for a predetermined amount of time after the engine shutdown to allow air at ambient atmospheric pressure to communicate with the intake manifold 26. Thus, a relatively high air pressure in an intake manifold 26 prevents exhaust gases from migrating into the intake manifold 26 which reduces a subsequent engine crank period.