US 12,146,449 B2
Systems and methods of fuel injection timing drift detection and compensation
Mayur H. Borate, Pune (IN); Srinivas Kumar Mulukutla, Columbus, IN (US); Shailesh Nair, Pune (IN); David Michael Carey, Bend, OR (US); and Syed Shah Jalal, Indianapolis, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 17/909,933
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed May 6, 2021, PCT No. PCT/US2021/031021
§ 371(c)(1), (2) Date Sep. 7, 2022,
PCT Pub. No. WO2021/252109, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 202011024405 (IN), filed on Jun. 10, 2020.
Prior Publication US 2024/0200504 A1, Jun. 20, 2024
Int. Cl. F02D 41/22 (2006.01); F02D 41/00 (2006.01); F02D 41/40 (2006.01)
CPC F02D 41/221 (2013.01) [F02D 41/009 (2013.01); F02D 41/401 (2013.01); F02D 2041/224 (2013.01); F02D 2041/228 (2013.01); F02D 2200/0602 (2013.01); F02D 2200/0618 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electronic control system, comprising:
one or more memories having stored thereon instructions and a series of fuel pressure data measured by a fuel pressure sensor in operative communication with a fuel accumulator and the electronic control system;
one or more processors configured to execute the instructions to perform operations comprising:
receiving an indication of fuel flow cutout, the indication comprising at least one of a fuel flow cutout command and a fuel flow cutout signal generated by a fuel flow controller;
receiving a start-of-injection command signal;
in response to receiving the indication of fuel flow cutout,
calculating, by the one or more processors, a set of pressure drops using the series of fuel pressure data received from the fuel pressure sensor;
comparing, by the one or more processors, the set of pressure drops with a predetermined threshold to identify a selected pressure drop greater than the predetermined threshold;
determining, by the one or more processors, a measured start-of-injection timing based on the selected pressure drop; and
evaluating, by the one or more processors, whether a fuel injection drifting occurs based on the received start-of-injection command signal and the measured start-of-injection timing.