Gm Global Technolgoy Operations, Inc.

Jan Andrzej Gatowski

Akram R Zahdeh

Layne K Wiggins

Kevin M Luchansky

Bryant G Hammond

An engine assembly includes a coolant pump, an engine structure, a radiator supply feed and a radiator bypass feed. The engine structure defines a first set of cylinders, a first coolant return gallery and a first cooling jacket. The first coolant return gallery extends in a longitudinal direction from a first longitudinal end to a second longitudinal end of the engine structure. The first cooling jacket is in communication with the coolant pump and with the first coolant return gallery. The first coolant return gallery forms a radiator bypass passage providing the coolant fluid to the coolant pump and bypassing the radiator during a first operating condition and forms a radiator supply passage providing the coolant fluid to the radiator during a second operating condition.

Engine assembly including cooling system

A control system for an engine includes a density determination module and a mass air flow (MAF) determination module. The density determination module determines a density of air in an induction system of the engine based on a temperature of the air, a pressure of the air, and a relative humidity of the air. The MAF determination module, based on the determined density of the air, a velocity of the air, and a cross-sectional area of the induction system, determines a MAF through the induction system.

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Beverly Hills, MI, United States of America

Jan Andrzej Gatowski