Ford Global Technolgoies, LLC

David Oshinsky

Alex O'Connor Gibson

Jeffrey Allen Doering

Adam Nathan Banker

Dennis C Reed

Joseph Lyle Thomas

Ross Dykstra Pursifull

Michael James Uhrich

James William Loch McCallum

Seung-Hoon Lee

Paul Hollar

Rani Kiwan

Mark Steven Yamazaki

Xiaoyong Wang

Joseph Norman Ulrey

Ming Lang Kuang

Rajit Johri

Felix Nedorezov

Wei Liang

Alexander O'Connor Gibson

Scott James Thompson

David George Farmer

Xiangying Liu

Henry W Patterson

Gregory Michael Pietron

Steven Wooldridge

Richard John Hippley

Edward Badillo

Danny Zdravkovski

Craig Cabadas

Hong Jiang

Brad Alan VanDerWege

Stanley Larue Bower

Mark Skilling

Donald Fenwick Dickison

Ace Koua Kue

Methods and systems for adjusting fuel injector operation according to changes in fuel pressure during inter-injection periods are described. The inter-injection period may be before and after fuel is injected to an engine. The methods and systems described herein may be suitable for direct and port fuel injectors.

Method and system for operating a fuel injector

Methods and systems are provided for a fuel system. In one example, a method includes comparing a resistance of a solenoid coil of a direct injector to a threshold resistance. The method further includes selecting one of a transient or a steady-state pressure-based injector balancing (PBIB) model in response to the comparison.

Methods and systems for fuel injection control

Methods and systems are provided for accounting for a difference between an expected amount of fuel scheduled to be delivered and an actual amount of fuel delivered to an engine cylinder during a fueling event. In one example, a method may include scheduling a direct injection to a cylinder based on an estimated expected amount of fuel injected to the cylinder during an immediately previous injection event. The expected amount of fuel injected during the immediately previous injection event may be a function of an average fuel rail pressure during the immediately previous injection event.

System and method for injecting fuel to an engine

Methods and systems are provided for balancing a plurality of fuel injectors. In one example, a method includes adjusting direct injector parameters in response to a learned direct injector fueling error. The pulse-width supplied to the direct injectors is adjusted to balance cylinder fueling.

Methods and systems for improving fuel injection repeatability

Methods and systems are provided for balancing injector fueling. In one example, a method includes learning portions of a transfer function shape by firing a plurality of injectors at PWs of a set of PWs following a reference injection.

Methods and systems for adjusting fuel injector operation according to fuel pressure and electrical fuel injector signals are described. In one example, the fuel injector transfer function values are adjusted in a way that may lower a burden on fuel injector adaptation. The methods and systems described herein may be suitable for direct and port fuel injectors.

Method and system for adjusting operation of a fuel injector

Methods and systems are provided for balancing a plurality of fuel injectors via a diagnostic. In one example, a method may include adjusting a fuel injection pattern to increase an occurrence of a fuel injection being preceded by a same-cylinder bank fuel injection. The method may further include skipping fuel injections resulting in the fuel injection being preceded by an opposite-cylinder bank fuel injection.

Methods and systems for fuel injector balancing

Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.

Methods and systems for starting an engine

Methods and systems are provided for reducing errors in estimated fuel rail pressure incurred at the time of a scheduled injection event due to engine-driven cyclic fuel rail pressure changes. In one example, a pulse-width commanded during a scheduled injection event is determined as a function fuel rail pressure samples collected over a moving window that is customized for the corresponding fuel injector. In another example, the commanded pulse-width is determined as a function of an average fuel rail pressure sampled during a quiet zone of injector operation and predicted fuel rail pressure altering events occurring between the quiet zone and the scheduled injection event.

Method and system for fuel injector balancing

Methods and systems are provided for injector balancing without disabling a cam actuated high pressure fuel pump. In one example, one of a plurality of cam lobes of the pump is selectively and sequentially disabled while a group of injectors are concurrently operated to learn a pressure drop across each injector. The selection of the injectors is based on the identity and stroke timing of the disabled cam lobe.

Systems and methods for improving operation of an engine are presented. In one example, a position of a throttle is adjusted along with other actuators to improve engine starting.

Methods and systems for adjusting cylinder air charge

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Trenton, MI, United States of America

David Oshinsky