US 12,104,544 B2
Air-fuel metering for internal combustion reciprocating engines
John Craig Colborn, Taylor Lake Village, TX (US)
Assigned to SETAYSHA TECHNICAL SOLUTIONS LLC, Magnolia, TX (US)
Filed by Setaysha Technical Solutions LLC, Taylor Lake Village, TX (US)
Filed on Aug. 29, 2021, as Appl. No. 17/460,252.
Application 17/460,252 is a continuation of application No. 17/033,661, filed on Sep. 25, 2020, granted, now 11,181,052.
Claims priority of provisional application 62/906,701, filed on Sep. 26, 2019.
Prior Publication US 2021/0388778 A1, Dec. 16, 2021
Int. Cl. F02D 19/00 (2006.01); F02D 19/02 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01); F02D 41/24 (2006.01); F02D 41/32 (2006.01); F02D 41/30 (2006.01)
CPC F02D 19/023 (2013.01) [F02D 19/029 (2013.01); F02D 41/0027 (2013.01); F02D 41/1445 (2013.01); F02D 41/2454 (2013.01); F02D 41/32 (2013.01); F02D 41/3082 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A fuel metering system for an internal combustion engine (ICE), the ICE having a maximum power output, at least a first combustion chamber associated with at least a first cylinder, and at least an intake stroke and a combustion stroke, the fuel metering system comprising:
a fuel injection timing unit comprising circuitry for providing a first timing signal indicative of the occurrence of at least one timepoint during at least one of an intake stroke, a compression stroke, a combustion stroke, and an exhaust stroke of the ICE;
a fuel metering element (FME) actuated by a first switch, the FME having a predetermined full stroke volume for metering fuel into an air-fuel mixing location in the ICE, wherein the predetermined full stroke volume is a volume of fuel creating one of a rich, combustible fuel mixture and a stoichiometric fuel mixture in the at least a first combustion chamber of the ICE at the maximum power output; and
a FME controller operatively coupled to the first switch and the FME to control the delivery of fuel to the air-fuel mixing location during actuation of the FME by providing an electrical control signal to the first switch in response to the first timing signal, wherein the electrical control signal causes the FME to deliver one of a full stroke volume of fuel and a fraction of a full stroke volume of fuel to achieve a desired air-to-fuel ratio (AFR), wherein the FME controller causes the FME to deliver a fraction of a full stroke volume by actuating the first switch at a timepoint during actuation of the FME to terminate the actuation of the FME.