US 12,264,605 B2
System facilitating cylinder deactivation and 1.5-stroke engine braking operation in an internal combustion engine
G. Michael Gron, Jr., Windsor, CT (US); Matei Alexandru, Simsbury, CT (US); John Mandell, Vernon, CT (US); Paul M. Bovat, East Longmeadow, MA (US); and Justin D. Baltrucki, Canton, CT (US)
Assigned to Jacobs Vehicle Systems, Inc., Bloomfield, CT (US)
Filed by Jacobs Vehicle Systems, Inc., Bloomfield, CT (US)
Filed on Dec. 4, 2023, as Appl. No. 18/528,560.
Claims priority of provisional application 63/386,134, filed on Dec. 5, 2022.
Prior Publication US 2024/0183291 A1, Jun. 6, 2024
Int. Cl. F01L 13/00 (2006.01); F01L 9/10 (2021.01); F01L 9/40 (2021.01); F01L 13/06 (2006.01); F02D 13/02 (2006.01); F02D 13/04 (2006.01); F02D 13/06 (2006.01)
CPC F01L 13/0005 (2013.01) [F01L 9/10 (2021.01); F01L 9/40 (2021.01); F01L 13/06 (2013.01); F02D 13/0203 (2013.01); F02D 13/04 (2013.01); F02D 13/06 (2013.01); F01L 2760/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for controlling valve motion to facilitate cylinder deactivation operation and 1.5-stroke engine braking operation in an internal combustion engine having at least two cylinders, each of the at least two cylinders comprising at least one intake valve and corresponding hydraulically-controlled intake deactivator, at least one exhaust valve and corresponding hydraulically-controlled exhaust deactivator and a hydraulically-controlled engine braking actuator, the system comprising:
a cylinder deactivation controller operatively connected to and in fluid communication with the intake deactivators and the exhaust deactivators for the at least two cylinders;
an engine braking controller operatively connected to and in fluid communication with the engine braking actuators for the at least one cylinder; and
a braking-dependent deactivator controller disposed between and in fluid communication with the cylinder deactivation controller and the intake deactivators for the at least two cylinders, and in fluid communication with the engine braking controller via a control input of the braking-dependent deactivator controller,
wherein the braking-dependent deactivator controller, according to hydraulic fluid selectively applied to the control input by the engine braking controller, is configured in a first state to permit hydraulic fluid flow in hydraulic fluid control passages for the intake deactivators for the at least two cylinders when in a non-1.5-stroke engine braking mode, and further configured in a second state to vent the hydraulic fluid control passages for the intake deactivators for the at least two cylinders when in a 1.5-stroke engine braking mode.