US 11,053,869 B2
Port injection system for reduction of particulates from turbocharged direct injection gasoline engines
Daniel R. Cohn, Cambridge, MA (US); and Leslie Bromberg, Sharon, MA (US)
Assigned to Ethanol Boosting Systems, LLC, Cambridge, MA (US)
Filed by Ethanol Boosting Systems, LLC, Cambridge, MA (US)
Filed on Aug. 10, 2020, as Appl. No. 16/988,917.
Application 16/988,917 is a continuation of application No. 16/774,620, filed on Jan. 28, 2020, granted, now 10,774,759.
Application 16/774,620 is a continuation of application No. 15/959,341, filed on Apr. 23, 2018, granted, now 10,683,816, issued on Jun. 16, 2020.
Application 15/959,341 is a continuation of application No. 15/214,533, filed on Jul. 20, 2016, granted, now 9,976,496, issued on May 22, 2018.
Application 15/214,533 is a continuation of application No. 14/391,906, granted, now 9,435,288, issued on Sep. 6, 2016, previously published as PCT/US2013/073334, filed on Dec. 5, 2013.
Claims priority of provisional application 61/734,438, filed on Dec. 7, 2012.
Prior Publication US 2020/0370483 A1, Nov. 26, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. F02D 41/06 (2006.01); F02D 37/02 (2006.01); F02P 5/152 (2006.01); F02D 41/00 (2006.01); F02D 41/30 (2006.01); F02D 41/34 (2006.01); F02D 41/38 (2006.01); F02P 5/145 (2006.01); F02M 69/04 (2006.01); F02D 19/08 (2006.01); F02D 13/02 (2006.01); F02D 13/06 (2006.01); F02B 75/12 (2006.01); F02D 41/04 (2006.01); F02D 41/10 (2006.01); F02D 41/14 (2006.01)
CPC F02D 37/02 (2013.01) [F02D 41/0007 (2013.01); F02D 41/0025 (2013.01); F02D 41/064 (2013.01); F02D 41/3094 (2013.01); F02D 41/345 (2013.01); F02D 41/3836 (2013.01); F02P 5/145 (2013.01); F02P 5/1521 (2013.01); F02B 2075/125 (2013.01); F02D 13/0215 (2013.01); F02D 13/06 (2013.01); F02D 19/084 (2013.01); F02D 41/0027 (2013.01); F02D 41/047 (2013.01); F02D 41/10 (2013.01); F02D 41/1466 (2013.01); F02D 2041/001 (2013.01); F02D 2041/389 (2013.01); F02D 2250/38 (2013.01); F02M 69/046 (2013.01); Y02T 10/10 (2013.01); Y02T 10/12 (2013.01); Y02T 10/30 (2013.01); Y02T 10/40 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A spark ignition engine having port fuel injectors and direct injectors;
wherein the spark ignition engine is first operated in cold start using more fuel that is directly injected than fuel that is port injected;
wherein during at least part of a drive cycle, the relative amount of fueling by port fuel injection is increased as a function of time as the engine warms up;
wherein port fuel injection alone is used during a part of a drive cycle; and
wherein direct injection is used during at least part of engine shutdown.