US 11,739,706 B2
Methods and systems for improving fuel injection repeatability
Ross Pursifull, Dearborn, MI (US); Rani Kiwan, Canton, MI (US); Paul Hollar, Belleville, MI (US); and Joseph Thomas, Farmington Hills, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Jun. 24, 2021, as Appl. No. 17/304,721.
Prior Publication US 2022/0412283 A1, Dec. 29, 2022
Int. Cl. F02D 41/24 (2006.01); F02D 41/20 (2006.01); F02D 41/22 (2006.01)
CPC F02D 41/2467 (2013.01) [F02D 41/20 (2013.01); F02D 41/221 (2013.01); F02D 41/2477 (2013.01); F02D 2041/2027 (2013.01); F02D 2041/224 (2013.01); F02D 2200/0602 (2013.01); F02D 2200/0616 (2013.01)] 17 Claims
OG exemplary drawing
 
6. A system, comprising:
an engine comprising a plurality of cylinders;
a plurality of port-fuel injectors and a plurality of direct injectors, wherein each cylinder of the plurality of cylinders includes at least one port-fuel injector of the plurality of port-fuel injectors and at least one direct injector of the plurality of direct injectors; and
a controller with computer-readable instructions stored on memory thereof that cause the controller to:
determine a fuel mass correction value for each of the plurality of direct injectors based on a fueling error thereof at a reference direct injector pulse-width (PW); and
when the reference direct injector PW is signaled to a direct injector, adjust a PW signal and operate a port-fuel injector of the plurality of port-fuel injectors to inject at least an amount of fuel corresponding to the fuel mass correction value of the direct injector of the plurality of direct injectors, wherein the port-fuel injector and the direct injector fuel a same cylinder of the plurality of cylinders.