Patent Number: 8,442,747

Title: Cylinder air mass prediction systems for stop-start and hybrid electric vehicles

Abstract: An engine system includes a first module that determines a cylinder of an engine to be in one of M prediction types and generates a distance from intake signal indicating a number of prediction steps the cylinder is away from an intake stroke. M is an integer greater than or equal to 3. A second module determines a cycle type of the cylinder. The cycle type indicates a number of combustion cycles the cylinder has experienced from a last restart of the engine. A cylinder air charge module estimates an air mass within the cylinder based on the distance from intake signal and the cycle type.

Inventors: Ma; Qi (Farmington Hills, MI), Shafto; Robert Douglas (New Hudson, MI)

Assignee: GM Global Technology Operations LLC

International Classification: F02D 41/06 (20060101); F02D 41/18 (20060101)

Expiration Date: 2021-05-14 0:00:00