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Papers by Jeffrey Cook
IEEE Control Systems Magazine
The process model for an internal combustion engine with spark ignition is inherently nonlinear. ... more The process model for an internal combustion engine with spark ignition is inherently nonlinear. For purposes of control analysis, it is desirable to have a linear model. This paper presents a discussion of recent activity in nonthermodynamic modeling of automotive internal combustion engines and shows how adequate linear models can be developed for control analysis. Literature Review Power plant characterizations for four-, six-, and eight-cylinder engines were developed in the early 1970s by Hazell and Flower [1]-[3]. These models and related analysis are significant in that Hazell and Flower were among the first to develop discrete models with sampling commensurate with engine crank-angle events, to develop approximations of the fuel-dependent torque by fulland partial-pulse representations, and to perform comparative parameter design and stability analyses.
This patent describes a method for controlling hydrocarbon emissions from an internal combustion ... more This patent describes a method for controlling hydrocarbon emissions from an internal combustion engine having an air/fuel intake coupled to a fuel vapor recovery system, comprising the steps of: providing engine spark timing to the internal combustion engine; periodically purging fuel vapors from the fuel vapor recovery system into the air/fuel intake; retarding the engine spark timing whenever the step of purging is initiated; and advancing the engine spark timing back to its timing before the step of purging was initiated.
1987 American Control Conference, Jun 10, 1987
... identified engine models suitable for spark and throttle four cylinder idle speed control ana... more ... identified engine models suitable for spark and throttle four cylinder idle speed control analysis. ... Takahashi, et al (19) do initially include an approximation of "combustion dynamics". ... by employing the principles of the conservation of mass and thermodynamic energy, and ...
IEEE Control Systems Magazine
The process model for an internal combustion engine with spark ignition is inherently nonlinear. ... more The process model for an internal combustion engine with spark ignition is inherently nonlinear. For purposes of control analysis, it is desirable to have a linear model. This paper presents a discussion of recent activity in nonthermodynamic modeling of automotive internal combustion engines and shows how adequate linear models can be developed for control analysis. Literature Review Power plant characterizations for four-, six-, and eight-cylinder engines were developed in the early 1970s by Hazell and Flower [1]-[3]. These models and related analysis are significant in that Hazell and Flower were among the first to develop discrete models with sampling commensurate with engine crank-angle events, to develop approximations of the fuel-dependent torque by fulland partial-pulse representations, and to perform comparative parameter design and stability analyses.
This patent describes a method for controlling hydrocarbon emissions from an internal combustion ... more This patent describes a method for controlling hydrocarbon emissions from an internal combustion engine having an air/fuel intake coupled to a fuel vapor recovery system, comprising the steps of: providing engine spark timing to the internal combustion engine; periodically purging fuel vapors from the fuel vapor recovery system into the air/fuel intake; retarding the engine spark timing whenever the step of purging is initiated; and advancing the engine spark timing back to its timing before the step of purging was initiated.
1987 American Control Conference, Jun 10, 1987
... identified engine models suitable for spark and throttle four cylinder idle speed control ana... more ... identified engine models suitable for spark and throttle four cylinder idle speed control analysis. ... Takahashi, et al (19) do initially include an approximation of "combustion dynamics". ... by employing the principles of the conservation of mass and thermodynamic energy, and ...