Exhaust gas temperature estimation

Details Exhaust gas temperature estimation Exhaust gas temperature estimation

1999-01-15

2000-09-12

McCall, Eric S.

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

061160830

ABSTRACT:
EGR system for an internal combustion engine (105) comprises an EGR valve (150) disposed in an EGR recirculation conduit (125) involves estimating exhaust gas temperature at an engine exhaust manifold. An exhaust gas temperature drop between the exhaust manifold and the EGR valve is estimated and a time constant is determined that models the exhaust gas temperature as a function of EGR mass flow rate so that exhaust gas temperature at the EGR valve can be estimated by adjusting the estimated exhaust gas temperature at the exhaust manifold by the exhaust gas temperature drop and the time constant.

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