Cold start compensation for P-I-D engine governor
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsVictor H. Miranda, James T. Beaucaire
Life of this patent
Estimating the term…
Abstract
An electronic engine control system includes a P-I-D governor (10) that provides a data output having a proportional component (P), an integral component (I), and a derivative component (D), each of which is derived from closed-loop processing of engine speed error data (NERR). A Cold Adder function (16) provides a further component to the data output, that further component having a data value that is based on engine temperature (EOT) and on elapsed engine running time since the engine was last started.
Claims12
An internal combustion engine comprising:
- an electronic engine control system;
- and
- a fueling system governed by an electronic P-I-D governor in the electronic engine control system;
- wherein the P-I-D governor provides a data output having a proportional component, an integral component, and a derivative component, each of which is derived from closed-loop processing of engine speed error data;
- and
- the P-I-D governor further comprises a function that provides a further component to the data output, that further component comprising a data value that is based on engine temperature and on elapsed engine running time since the engine was last started.
An electronic engine control system for an internal combustion engine that has a fueling system for fueling the engine, the control system comprising:
- an electronic P-I-D governor that provides a data output having a proportional component, an integral component, and a derivative component, each of which is derived from closed-loop processing of engine speed error data;
- and
- a function that provides a further component to the data output of the P-I-D governor, that further component comprising a data value that is based on engine temperature and on elapsed engine running time since the engine was last started.
A method of governing an internal combustion engine that has an electronic engine control system and a fueling system for fueling the engine under control of the engine control system, the method comprising:
- closed-loop processing engine speed error data in an electronic P-I-D governor of the engine control system to provide a data output having a first component that is a proportional function of the error data, a second component that is an integral function of the error data, and a third component that is a derivative function of the error data;
- and
- processing engine temperature data and engine running time data corresponding to elapsed engine running time since the engine was last started to provide a further component to the data output of the P-I-D governor.
Dependencies are inferred from the claim text.