公开(公告)号：US20140238353A1

公开(公告)日：2014-08-28

申请号：US13778343

申请日：2013-02-27

Applicant: CATERPILLAR INC.

Inventor： Cory A. Brown ,  Michael A. Brown ,  Steven Thomas Grant ,  Daniel Reese Puckett, Jr.

IPC: F02M51/06

CPC classification number: F02M51/06 ,  F02D19/025 ,  F02D19/08 ,  Y02T10/32 ,  Y02T10/36

Abstract: Methods and systems for detecting leakage of a liquid fuel into a gas fuel rail of a dual-fuel system for an internal combustion engine are disclosed. The methods and systems include sending an injection signal from a controller to a fuel injector and subsequently injecting gas fuel and liquid fuel into a cylinder for combustion. A pressure in the gas rail detects the pressure in the gas rail over a pre-determined time period after the injection event. A controller measures pressure fluctuations in the gas rail over a pre-determined time period after the injection event. If the pressure in the gas rail fluctuates by more than the pre-determined amount, the controller is programmed to take at least one mitigating action to prevent or limit damage to the engine.

Abstract translation: 公开了一种用于检测液体燃料进入用于内燃机的双燃料系统的气体燃料轨道的泄漏的方法和系统。 所述方法和系统包括将喷射信号从控制器发送到燃料喷射器，随后将气体燃料和液体燃料喷射到用于燃烧的气缸中。 气体导轨中的压力在喷射事件之后的预定时间段内检测气轨中的压力。 控制器在注射事件之后的预定时间段内测量气轨中的压力波动。 如果气体轨道中的压力波动超过预定量，则控制器被编程为采取至少一个减轻措施来防止或限制对发动机的损坏。