US 11,053,908 B2
Device and method for detecting a cylinder deactivation mode using inferred compression
David J. Chesney, Northville, MI (US); and Roderick Alexander Simpson, Windsor (CA)
Assigned to Ford Motor Company, Dearborn, MI (US)
Filed by Ford Motor Company, Dearborn, MI (US)
Filed on May 21, 2018, as Appl. No. 15/984,691.
Prior Publication US 2019/0353135 A1, Nov. 21, 2019
Int. Cl. F02P 17/12 (2006.01); G01M 15/04 (2006.01); F02D 13/06 (2006.01); F02D 17/02 (2006.01); F02D 41/00 (2006.01)
CPC F02P 17/12 (2013.01) [F02D 13/06 (2013.01); F02D 17/02 (2013.01); F02D 41/0087 (2013.01); G01M 15/042 (2013.01); F02P 2017/121 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of verifying a cylinder deactivation mode on an engine comprising:
activating an ignition device in a deactivated cylinder during an exhaust stroke of the deactivated cylinder;
measuring a primary side supply voltage of the ignition device;
comparing at least one of an amplitude and a timing of a measured spike of the primary side supply voltage against a baseline voltage spike; and
indicating a status of the deactivation mode based on the comparison against the baseline voltage spike.