US 11,988,163 B2
Cylinder deactivation expanded operational range with additional air source integrated with turbocharger
Trevor Ott, Anacortes, WA (US); Maarten Meijer, Anacortes, WA (US); Stephen Ciatti, Bellingham, WA (US); and Brandon Rouse, Anacortes, WA (US)
Assigned to PACCAR Inc
Filed by PACCAR Inc, Bellevue, WA (US)
Filed on Sep. 9, 2022, as Appl. No. 17/930,892.
Prior Publication US 2024/0084751 A1, Mar. 14, 2024
Int. Cl. F02D 41/00 (2006.01); F02B 37/12 (2006.01); F02B 39/10 (2006.01); F02D 41/14 (2006.01); F02D 41/18 (2006.01)
CPC F02D 41/0007 (2013.01) [F02B 37/12 (2013.01); F02B 39/10 (2013.01); F02D 41/0087 (2013.01); F02D 41/1454 (2013.01); F02D 41/18 (2013.01); F02B 2037/122 (2013.01); F02D 2200/101 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A vehicle including:
a diesel engine including a plurality of cylinders;
a turbocharger operative to receive exhaust gas from the diesel engine and supply charged intake air to the diesel engine, the turbocharger including an auxiliary air source;
at least one sensor; and
an engine control unit, comprising:
at least one processor; and
memory coupled to the at least one processor including instructions that, when executed by the at least one processor, cause the engine control unit to:
determine to activate CDA mode;
send at least one signal to deactivate at least one of a plurality of cylinders of the diesel engine;
determine a target mass air flow range of intake air to the diesel engine that allows for continued CDA mode operation within an efficiency operating range;
determine a mass air flow rate of the diesel engine; and
when the mass air flow rate is determined to be below the target mass air flow range, send at least one signal to cause the auxiliary air source to add torque to a shaft of the turbocharger in order to reach at least the target mass air flow range.