Gm Global Technolgoy Operations, Inc.

Michael N Kotsonas

Michael J Lucido

Mark D Carr

Jon C Miller

Jesse Michael Gwidt

Karen Margaret-Bell Gwidt

Dean R Kwapis

Robert C Gibson

Michael C Zumbaugh

Robert X Monchamp

A cold start control module for a direct injection engine includes a fuel flow determination module and a cylinder activation/deactivation module. The fuel flow determination module determines a requested fuel flow. The cylinder activation/deactivation module deactivates at least one of cylinders when the requested fuel flow exceeds a maximum fuel flow of the fuel pump during cold start.

Method of starting spark-ignition direct injection (SIDI) engines

A control system includes an engine enable module and a fuel control module. The engine enable module determines whether predetermined operating conditions of a spark ignition direct injection (SIDI) engine are satisfied and enables an engine prime mode when the predetermined operating conditions are satisfied. The fuel control module controls a fuel injector to deliver a prime pulse to a cylinder of the SIDI engine when the engine prime mode is enabled. The fuel injector delivers the prime pulse by opening for a pulse width to inject fuel directly into the cylinder when the SIDI engine is stopped.

Control system and method for improving cold startability of spark ignition direct injection (SIDI) engines

A method and control module for operating an engine that includes a pressure range determination module that determines a pressure value for a pressure sensor in a fuel rail is out of range. A fuel rail pressure estimate module that determines a predicted pressure value. An engine control module that operates the engine using the predicted pressure value.

Control system and method for controlling an engine in response to detecting an out of range pressure signal

An engine control system for a vehicle comprises a combustion control module and an engine startup module. The combustion control module selectively controls a spark timing and airflow into an engine based on a counter value. The engine startup module, when the counter value is one of greater than and less than a predetermined final value, controls an equivalence ratio (EQR) of an air/fuel mixture provided to the engine during an engine cranking period based on a fuel rail pressure and controls the EQR during an engine running period based on the fuel rail pressure and an engine runtime period. The counter value is set to the predetermined final value after the engine is started for a first time after the engine is assembled.

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Highland, MI, United States of America

Michael N Kotsonas