System and method of controlling exhaust gas recirculation

Details System and method of controlling exhaust gas recirculation System and method of controlling exhaust gas recirculation

1998-04-13

2000-01-04

Wolfe, Willis R.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

12356812, 12356826, F02M 2507

Patent

active

060097094

ABSTRACT:
An exhaust gas recirculation (EGR) system for a pressure-charged internal engine for use in a high load condition is presented. The disclosed EGR system includes one or more exhaust combustion chambers attached to a recirculation manifold. A pressure sensor is located in an inlet air manifold. Where the pressure in the inlet manifold is above a predetermined level, a flow control device directs recirculation flow through a supply conduit into the inlet manifold. The disclosed embodiment includes an EGR cooling system where cool air in a bleed conduit connecting an inlet conduit to the exhaust manifold exchanges heat with exhaust gas in the supply. A bleed valve in the bleed conduit moves in response to temperature in the supply duct along with the position of the flow control device to prevent condensation in the combustion chambers. The invention also includes methods for controlling EGR system and EGR cooling system.

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