Prasanna M Ballal

US Patent:

20150198110, Jul 16, 2015

Filed:

Jan 13, 2014

Appl. No.:

14/153485

Inventors:

- Peoria IL, US
Bryan Moore - Washington IL, US
Michael Edward Sattler - Eureka IL, US
Prasanna Mohan Ballal - Peoria IL, US
Bradley Scott Bashore - Peoria IL, US
Kranti Kumar Nellutla - Bloomington IL, US

Assignee:

Caterpillar, Inc. - Peoria IL

International Classification:

F02D 41/38
F02M 51/06

Abstract:

Fuel is injected by energizing a solenoid of a fuel injector for an on-time that terminates at a first end-of-current timing. An end-of-current trim is determined at least in part by estimating a duration between an induced current event in a circuit of the solenoid and a valve/armature interaction event. An induced current event occurs when an armature abruptly stops, and a valve/armature interaction event occurs when the armature couples with or de-couples from the valve member. Fuel is injected in a subsequent injection event by adjusting the end-of-current timing by the end-of-current trim.