US 12,392,297 B1
Exhaust gas temperature control
Justin Edward Ketterer, LaSalle (CA); Andrew Michael Aerts, Royal Oak, MI (US); Robert S. McAlpine, Lake Orion, MI (US); Kenneth Briscoe, Commerce Township, MI (US); Kevin M. Luchansky, Bloomfield Hills, MI (US); and Pratap Srinivasa Murthy, Dexter, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Nov. 11, 2024, as Appl. No. 18/943,418.
Int. Cl. F02D 9/04 (2006.01); F02B 37/00 (2006.01); F02D 23/00 (2006.01); F02D 41/00 (2006.01); F02P 5/15 (2006.01)
CPC F02D 9/04 (2013.01) [F02B 37/00 (2013.01); F02D 23/00 (2013.01); F02D 41/0047 (2013.01); F02P 5/15 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling exhaust gas temperature within a vehicle engine, comprising:
measuring an exhaust gas temperature (EGT) at a catalyst inlet with an EGT sensor in communication with a system controller;
comparing, with the system controller, the measured EGT to a target EGT; and
when the measured EGT is greater than the target EGT:
limiting, with the system controller, gas exchange within a cylinder within the engine during an intake stroke; and
increasing, with the system controller, turbine efficiency of a variable geometry turbocharger of the engine by increasing boost from the turbocharger.