Method for diagnosing an engine using a computer based boost pressure model
First Claim
Patent Images
1. A method for diagnosing an engine having an exhaust manifold and a turbocharger by modeling boost pressure, including the steps of:
- sensing a boost pressure of said turbocharger and responsively delivering an measured boost pressure signal;
sensing at least one parameter of the engine and responsively producing at least one parameter signal;
receiving said at least one parameter signal and responsively determining a modeled exhaust temperature value;
sensing at least one other parameter of the engine and responsively producing at least one other parameter signal;
receiving said at least one other parameter signal and said modeled exhaust temperature value and responsively determining a modeled boost pressure value;
receiving said measured boost pressure signal and said modelled boost pressure signal, comparing said measured boost pressure signal and said modeled boost pressure value and responsively producing a difference signal; and
receiving said difference signal and responsively diagnosing said engine.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method for diagnosing an engine using a computer based boost pressure model, a first set of parameters of the engine is sensed and used to determined a modeled value of an exhaust temperature. A second set of parameters of the engine is sensed. A modeled value of the boost pressure is determined as a function of the second set of parameters and the modelled exhaust temperature value.
-
Citations
18 Claims
-
1. A method for diagnosing an engine having an exhaust manifold and a turbocharger by modeling boost pressure, including the steps of:
-
sensing a boost pressure of said turbocharger and responsively delivering an measured boost pressure signal; sensing at least one parameter of the engine and responsively producing at least one parameter signal; receiving said at least one parameter signal and responsively determining a modeled exhaust temperature value; sensing at least one other parameter of the engine and responsively producing at least one other parameter signal; receiving said at least one other parameter signal and said modeled exhaust temperature value and responsively determining a modeled boost pressure value; receiving said measured boost pressure signal and said modelled boost pressure signal, comparing said measured boost pressure signal and said modeled boost pressure value and responsively producing a difference signal; and receiving said difference signal and responsively diagnosing said engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification