公开(公告)号：US20190211772A1

公开(公告)日：2019-07-11

申请号：US15865706

申请日：2018-01-09

Applicant: GM Global Technology Operations LLC

Inventor： Paolo CASASSO ,  Tiziana BELVEDERE ,  Umberto FERRARA ,  Luca CHIAPUSSO

IPC: F02D41/40 ,  F02D41/38

Abstract: An injector driver module includes: a first node that is connected to a first terminal of a fuel injector; a first switch configured to, when closed, connect a first potential of a battery to the first node; a second switch configured to, when closed, connect a second potential that is greater than the first potential to the first node; a second node that is connected to a second terminal of the fuel injector; and a third switch configured to, when closed, connect a ground potential to the second node. A switch control module is configured to, starting at a target injecting timing for a fuel injection event of the fuel injector: maintain the third switch closed; and switch the second switch using a pulse width modulated (PWM) signal having (i) a duty cycle that is less than 100 percent and (ii) a predetermined frequency.

公开(公告)号：US20160177859A1

公开(公告)日：2016-06-23

申请号：US14967468

申请日：2015-12-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Luca GATTI ,  Chiara POZZI ,  Giorgio NATI ,  Davide Francesco MERCURI ,  Luca CHIAPUSSO

IPC: F02D41/30 ,  F02D41/02

CPC classification number: F02D41/0255 ,  F02D41/0055 ,  F02D41/025 ,  F02D41/402 ,  F02D41/405 ,  Y02T10/26 ,  Y02T10/44 ,  Y02T10/47

Abstract: A method of operating an internal combustion engine is described, which includes executing a warm up strategy of an engine aftertreatment system, wherein the warm up strategy includes injecting fuel into the engine according to a multi-injection pattern having at least one after injection.

Abstract translation: 描述了一种操作内燃机的方法，其包括执行发动机后处理系统的预热策略，其中预热策略包括根据具有至少一次喷射后的多喷射模式将燃料喷射到发动机中。