Control system for exhaust gas recovery system in an internal co

Details Control system for exhaust gas recovery system in an internal co Control system for exhaust gas recovery system in an internal co

1997-07-03

1998-06-30

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

606052, 1235592, F02M 2507, F02B 3344

Patent

active

057718679

ABSTRACT:
A system and method for controlling an exhaust gas recirculation system in an internal combustion engine having two or more actuating devices on a supercharger-type pressure-charged internal combustion engine, or, in a turbocharger equipped pressure-charged internal combustion engine. In the disclosed embodiments, the actuating devices may include a variable gas pocket valve, an air intake throttle valve, an exhaust gas recirculation valve, a turbocharger back pressure valve, or the adjustable turbine blades in a variable gas turbine. In the disclosed embodiments, the control system includes a pair of actuators operatively coupled to an engine controller. The second actuator is operatively responsive to the first actuator when the first actuator command signal exceeds prescribed actuator limits. However, when the first actuator is commanded or operating within the prescribed actuator limits, the variance or feedback signal is zero and the second actuator operates more or less independently of the first actuator.

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