公开(公告)号：US20200208546A1

公开(公告)日：2020-07-02

申请号：US16815261

申请日：2020-03-11

Applicant: EATON INTELLIGENT POWER LIMITED

Inventor： James E. McCarthy, JR. ,  Douglas J. Nielsen

IPC: F01L13/00 ,  F02D17/02 ,  F01L1/24 ,  F02D13/06 ,  F02D41/00 ,  F02D13/02 ,  F02D41/22 ,  F02D41/02

Abstract: A system and method of controlling a cylinder deactivation mechanism can comprise executing a valve lift event configured to lift a valve via a rocker arm. The rocker arm can be configured with a controllable latch in a latched condition, wherein the controllable latch is configured with an edge that is clamped in a recess in the rocker arm during the valve lift event, a clamp force supplied in part by pressure from the valve lift event. A deactivation signal can be sent to select the unlatched condition to collapse the controllable latch from the recess while the controllable latch is configured in the valve lift event with the edge clamped in the recess. A subsequent valve lift event can have actuation deactivated by collapsing the controllable latch from the recess once the valve lift event is complete and the clamp force is removed.

公开(公告)号：US20190178168A1

公开(公告)日：2019-06-13

申请号：US16326699

申请日：2017-08-17

Applicant: Eaton Intelligent Power Limited

Inventor： James E. McCarthy, Jr. ,  Douglas J. Nielsen ,  Brian Franke

IPC: F02D17/02 ,  F02D41/00

Abstract: A friction loss management system for an engine, comprises a combustion engine comprising a crankshaft and a plurality of cylinders, a reciprocating piston assembly connected to the crankshaft, a fuel injector, an intake valve, and an exhaust valve. A control unit comprises at least one set of control algorithms configured to receive engine power demand data, and determine a number of cylinders of the plurality of cylinders for deactivation based on the received engine power demand data and further based on sensed or stored friction values for the plurality of cylinders. Determining the number of cylinders of for deactivation minimizes friction between the plurality of cylinders and their respective reciprocating piston assembly by selecting a cylinder combination of active cylinders and deactivated cylinders with the lowest total friction while meeting engine power demand. All cylinders can be deactivated for purposes of coasting or controlling speed during platooning.