公开(公告)号：US10260446B2

公开(公告)日：2019-04-16

申请号：US15215620

申请日：2016-07-21

Applicant: General Electric Company

Inventor： Pradheepram Ottikkutti ,  Bharath Chandrashekar ,  Shailesh Nair ,  Jeffrey David Willis

IPC: F02D41/38 ,  F02M59/46 ,  F02M55/02 ,  F16K37/00 ,  F02D41/24 ,  F02D41/12 ,  F02D41/20 ,  F02D41/22

Abstract: Various methods and systems are provided for health assessments of a fuel system. In one example, a fuel system includes a low-pressure pump operable to pump fuel from a fuel source at a first pressure, a high-pressure pump operable to increase the first pressure to a second pressure, a valve positioned between the low-pressure pump and the high-pressure pump and operable to control fuel flow to the high-pressure pump, a common fuel rail fluidly coupling the high-pressure pump to a plurality of fuel injectors coupled to cylinders of an engine, and a controller. The controller is operable to adjust an amount of valve electrical current supplied to the valve to reach a commanded pressure of the common fuel rail during cylinder firing conditions, the supplied valve electrical current adjusted based on a valve pre-firing correction factor for the valve obtained based on valve electrical current prior to cylinder firing commencing.

公开(公告)号：US20180023501A1

公开(公告)日：2018-01-25

申请号：US15215620

申请日：2016-07-21

Applicant: General Electric Company

Inventor： Pradheepram Ottikkutti ,  Bharath Chandrashekar ,  Shailesh Nair ,  Jeffrey David Willis

IPC: F02D41/38 ,  F02M55/02 ,  F16K37/00 ,  F02M59/46

CPC classification number: F02D41/3845 ,  F02D41/123 ,  F02D41/2438 ,  F02D2041/2058 ,  F02D2041/224 ,  F02D2200/0602 ,  F02M55/025 ,  F02M59/466 ,  F16K37/0083

Abstract: Various methods and systems are provided for health assessments of a fuel system. In one example, a fuel system includes a low-pressure pump operable to pump fuel from a fuel source at a first pressure, a high-pressure pump operable to increase the first pressure to a second pressure, a valve positioned between the low-pressure pump and the high-pressure pump and operable to control fuel flow to the high-pressure pump, a common fuel rail fluidly coupling the high-pressure pump to a plurality of fuel injectors coupled to cylinders of an engine, and a controller. The controller is operable to adjust an amount of valve electrical current supplied to the valve to reach a commanded pressure of the common fuel rail during cylinder firing conditions, the supplied valve electrical current adjusted based on a valve pre-firing correction factor for the valve obtained based on valve electrical current prior to cylinder firing commencing.