US 9,810,166 B2
Fuel management system for variable ethanol octane enhancement of gasoline engines
Daniel R. Cohn, Cambridge, MA (US); John B. Heywood, Newtonville, MA (US); and Leslie Bromberg, Sharon, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
Filed on Mar. 20, 2017, as Appl. No. 15/463,425.
Application 15/463,425 is a continuation of application No. 14/982,086, filed on Dec. 29, 2015.
Application 14/982,086 is a continuation of application No. 14/478,069, filed on Sep. 5, 2014, granted, now 9,255,519, issued on Feb. 9, 2016.
Application 14/478,069 is a continuation of application No. 14/249,806, filed on Apr. 10, 2014, granted, now 8,857,410, issued on Oct. 14, 2014.
Application 14/249,806 is a continuation of application No. 13/956,498, filed on Aug. 1, 2013, granted, now 8,733,321, issued on Nov. 28, 2013.
Application 13/956,498 is a continuation of application No. 13/629,836, filed on Sep. 28, 2012, granted, now 8,522,746, issued on Sep. 3, 2013.
Application 13/629,836 is a continuation of application No. 13/368,382, filed on Feb. 8, 2012, granted, now 8,302,580, issued on Nov. 6, 2012.
Application 13/368,382 is a continuation of application No. 13/282,787, filed on Oct. 27, 2011, granted, now 8,146,568, issued on Apr. 3, 2012.
Application 13/282,787 is a continuation of application No. 13/117,448, filed on May 27, 2011, granted, now 8,069,839, issued on Dec. 6, 2011.
Application 13/117,448 is a continuation of application No. 12/815,842, filed on Jun. 15, 2010, granted, now 7,971,572, issued on Jul. 5, 2011.
Application 12/815,842 is a continuation of application No. 12/329,729, filed on Dec. 8, 2008, granted, now 7,762,233, issued on Jul. 24, 2010.
Application 12/329,729 is a continuation of application No. 11/840,719, filed on Aug. 17, 2007, granted, now 7,740,004, issued on Jun. 22, 2010.
Application 11/840,719 is a continuation of application No. 10/991,774, filed on Nov. 18, 2004, granted, now 7,314,033, issued on Jan. 1, 2008.
Prior Publication US 2017/0191431 A1, Jul. 6, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. F02D 41/30 (2006.01); F02D 41/00 (2006.01); F02M 25/14 (2006.01); F02D 35/02 (2006.01); F02P 5/04 (2006.01); F02B 47/04 (2006.01); F02D 41/38 (2006.01)
CPC F02D 41/0025 (2013.01) [F02B 47/04 (2013.01); F02D 35/027 (2013.01); F02D 41/3094 (2013.01); F02M 25/14 (2013.01); F02P 5/045 (2013.01); F02D 2041/389 (2013.01); F02D 2200/1002 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A fuel management system for a spark ignition engine which utilizes port fuel injection and also utilizes direct fuel injection;
and where there is a first torque range where direct injection and port injection are both used at the same value of torque throughout the first torque range
and where in at least part of the first torque range as torque is increased the amount of fuel that is directly injected is changed so as to obtain knock-free operation and the amount of directly injected fuel used to provide knock-free operation is minimized.