Ford Global Technolgoies, LLC

Gary Alan Coulson

Steven Wooldridge

Gopichandra Surnilla

Xiaogang Zhang

Jianwen James Yi

Brad Alan VanDerWege

David Bruce Reiche

Alexander O'Connor Gibson

Peter Charles Moilanen

Claudia Olivia Iyer

Foo Chern Ting

Jennifer Fischer

Systems and methods for cold starting an internal combustion engine are described. In one example, fuel is delivered in four equal amounts into a cylinder during a cycle of the cylinder. The fuel is injected so as to reduce cylinder wall wetting, raise combustion stability, and increase exhaust system heating.

Methods and system for engine cold starting

Methods are provided for reducing exhaust gas emissions during a cold-start of an engine. In one example, a method may include generating a flame front in an exhaust port of an exhaust system, heating exhaust gas flowing into an emission control device of the exhaust system and thereby expediting the approach to a light-off temperature of the emission control device, and directing the flame front back to the cylinder as part of a combustion stroke of the four-stroke engine cycle.

Methods for reducing cold start emissions for engines

Methods and systems are provided for adjusting engine cranking speed, fueling, and spark initiation to increase fuel vaporization during cold-start conditions. In one example, a method may include, during engine cold-start, cranking the engine at a lower speed relative to a nominal cranking speed while injecting fuel and disabling spark for a number of engine cycles, and after the completion of the number of engine cycle increasing the cranking speed and initiating spark.

Method and system for engine cold-start

Methods and systems are provided for improving engine startability during cold-start conditions, when operating with gasoline fuels, alcohol fuels, or blended fuels. In one example, a method of engine cold-start control may include initiating fuel injection for cylinder combustion with manifold pressure lowered via intake throttle adjustments. The manifold pressure is lowered based on an optimization between cylinder charge reduction and improved fuel boiling at the lower pressure.

Engine cold-start control

A fuel injector having an injector axis, comprising a first nozzle aiming in a first radial direction; a first nozzle pair aiming in radial directions each equally angled relative to the first direction, closest to the first radial direction, and having a longest radial offset; a nozzle second pair in radial directions each equally angled relative to the first direction; and another nozzle aiming opposite the first radial direction and having a shortest radial offset.

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Ypsilanti, MI, United States of America

Gary Alan Coulson