公开(公告)号：US10072601B2

公开(公告)日：2018-09-11

申请号：US15053766

申请日：2016-02-25

Applicant: Ford Global Technologies, LLC

Inventor： Dietmar Hermann ,  Uwe Reuter ,  David van Bebber

IPC: F02D41/38 ,  F02D41/06 ,  F02D41/26 ,  F02D41/04 ,  F02N11/08 ,  F02M55/02

CPC classification number: F02D41/3863 ,  F02D41/042 ,  F02D41/062 ,  F02D41/26 ,  F02D41/3818 ,  F02D41/3827 ,  F02D41/3845 ,  F02D41/3854 ,  F02M55/025 ,  F02N11/0814

Abstract: Methods and system are provided for operating a fuel system of a stop-start engine system. In one example a method may comprise powering off a lift pump and maintaining a volume control valve in a closed position during an engine stop to maintain a fuel pressure within a fuel rail and one or more fuel injectors. The method may further comprise, in response to determining an engine start is desired, powering on the lift pump, initiating cylinder combustion, and operating a higher pressure pump (HPP) in an unpressurized mode when a fuel pressure upstream of the HPP is less than a threshold and switching to operating the HPP in a pressurized mode when the fuel pressure upstream of the HPP reaches the threshold.

公开(公告)号：US20160245220A1

公开(公告)日：2016-08-25

申请号：US15053766

申请日：2016-02-25

Applicant: Ford Global Technologies, LLC

Inventor： Dietmar Hermann ,  Uwe Reuter ,  David van Bebber

IPC: F02D41/38 ,  F02D41/26

CPC classification number: F02D41/3863 ,  F02D41/042 ,  F02D41/062 ,  F02D41/26 ,  F02D41/3818 ,  F02D41/3827 ,  F02D41/3845 ,  F02D41/3854 ,  F02M55/025 ,  F02N11/0814

Abstract: Methods and system are provided for operating a fuel system of a stop-start engine system. In one example a method may comprise powering off a lift pump and maintaining a volume control valve in a closed position during an engine stop to maintain a fuel pressure within a fuel rail and one or more fuel injectors. The method may further comprise, in response to determining an engine start is desired, powering on the lift pump, initiating cylinder combustion, and operating a higher pressure pump (HPP) in an unpressurized mode when a fuel pressure upstream of the HPP is less than a threshold and switching to operating the HPP in a pressurized mode when the fuel pressure upstream of the HPP reaches the threshold.

Abstract translation: 提供了用于操作停止起动发动机系统的燃料系统的方法和系统。 在一个示例中，一种方法可以包括在发动机停止期间关闭提升泵并将体积控制阀保持在关闭位置，以将燃料压力维持在燃料轨道和一个或多个燃料喷射器内。 该方法还可以包括：当HPP上游的燃料压力小于或等于的情况下，响应于确定需要发动机启动，对提升泵供电，启动气缸燃烧和以非加压模式操作高压泵（HPP） 阈值，并且当HPP上游的燃料压力达到阈值时，切换到以加压模式操作HPP。