公开(公告)号：US20180017010A1

公开(公告)日：2018-01-18

申请号：US15648069

申请日：2017-07-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Stefano NIEDDU ,  Andrea MOLLAR

IPC: F02D41/38 ,  F02M63/02 ,  F02M59/10 ,  F02D41/40 ,  F02D41/14

CPC classification number: F02D41/3872 ,  F02D41/1401 ,  F02D41/3809 ,  F02D41/3818 ,  F02D41/3827 ,  F02D41/3845 ,  F02D41/40 ,  F02D41/401 ,  F02D2041/1433 ,  F02D2200/0602 ,  F02D2200/0616 ,  F02M59/105 ,  F02M63/0245 ,  Y02T10/44

Abstract: A method and apparatus are disclosed for determining the fuel quantity that is actually injected by a fuel injector in an internal combustion engine. A fuel injector is operated to perform a fuel injection. The first discharge stroke of the fuel pump is deactivated following a start of the fuel injection for preventing the discharge stroke from delivering fuel into the fuel rail. A value of a pressure drop caused into the fuel rail by the fuel injection is calculated. A value of a fuel quantity injected by the fuel injection is calculated on the basis of the calculated value of the pressure drop.

公开(公告)号：US20190003414A1

公开(公告)日：2019-01-03

申请号：US15638026

申请日：2017-06-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Stefano NIEDDU ,  Andrea MOLLAR

IPC: F02D41/38 ,  F02D41/24 ,  F02D1/06 ,  F02M26/47

CPC classification number: F02D41/3872 ,  F02D1/06 ,  F02D41/2467 ,  F02D41/3809 ,  F02D41/3818 ,  F02D41/3827 ,  F02D2041/1432 ,  F02D2041/286 ,  F02D2200/0602 ,  F02D2200/0612 ,  F02D2200/0614 ,  F02D2200/0616 ,  F02D2250/14 ,  F02M26/47

Abstract: A method for operating a combustion engine is provided. A fuel injector is operated to perform a fuel injection, a sequence of pressure signals of the fuel rail pressure during the fuel injection is sampled and filtered and a total pressure difference between a first sample after a top dead center of the fuel pump and before the fuel injection has started and a chosen second sample after the injection and before a next pumping stroke is determined. A linear pressure slope at the second sample and a leakage pressure difference between the first sample and the second sample based on the linear pressure slope is calculated, leading to calculating an injection pressure difference as the difference between total pressure difference and the leakage pressure difference. With this, a value of a fuel quantity injected as a function of the injection pressure difference can be determined, while leakages are compensated.

公开(公告)号：US20160215708A1

公开(公告)日：2016-07-28

申请号：US15004408

申请日：2016-01-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Stefano NIEDDU ,  Andrea MOLLAR

IPC: F02D33/00 ,  F02D1/02

CPC classification number: F02D1/02 ,  F02D41/2467 ,  F02D41/3827 ,  F02D2041/286 ,  F02D2200/0602 ,  F02D2200/0616 ,  F02D2200/0618 ,  F02M26/05 ,  F02M26/25 ,  F02M26/47

Abstract: A method of determining the timing and quantity of fuel injection to operate an internal combustion engine is disclosed. While operating the fuel injector to perform a fuel injection; a signal of a fuel pressure within the fuel rail during the fuel injection is sampled. The signal is used to determine first and second integral transforms yielding as output a value of first and second functions having as variables the fuel rail pressure drop caused by the fuel injection and the timing parameter indicative of the instant when the fuel injection started. Values of the first and second functions are used to calculate a value of the fuel rail pressure drop caused by the fuel injection and a value of the timing parameter. A value of a fuel quantity injected by the fuel injection is calculated as a function of the value of the fuel rail pressure drop.

Abstract translation: 公开了一种确定用于操作内燃机的燃料喷射的时间和数量的方法。 在操作燃料喷射器进行燃料喷射的同时; 在燃料喷射期间燃料轨内的燃料压力的信号被采样。 该信号用于确定第一和第二积分变换，其产生作为输出的第一和第二函数的值，其具有作为变量的由燃料喷射引起的燃料轨压力降和指示燃料喷射开始时的时刻参数。 第一和第二功能的值用于计算由燃料喷射引起的燃料轨压力值和定时参数的值。 根据燃料轨压力值的值来计算通过燃料喷射喷射的燃料量的值。

公开(公告)号：US20170108139A1

公开(公告)日：2017-04-20

申请号：US15299244

申请日：2016-10-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Stefano NIEDDU ,  Andrea MOLLAR ,  Tiziano SORRENTINO

IPC: F16K31/06 ,  H02P6/00 ,  H02K1/34 ,  H02K41/02 ,  H02K3/04

CPC classification number: F16K31/0675 ,  F02D41/20 ,  F02D41/222 ,  F02D41/3845 ,  F02D2041/2055 ,  F02D2041/2058 ,  F02D2041/224 ,  F02M59/368 ,  H02K1/34 ,  H02K3/04 ,  H02K41/02 ,  H02P6/006 ,  H02P25/06

Abstract: A circuit and a method for a digital inlet valve having a shutter moveable between a closed and an open position and actuated by a linear electromagnetic actuator including a movable needle located inside a coil winding connected to a power source by a first electronic switch. An electric current is supplied to the coil winding. A parameter indicative of a movement of the needle is monitored. The electric current supply is adjusted when the monitored parameter exceeds a predetermined value.

公开(公告)号：US20160333799A1

公开(公告)日：2016-11-17

申请号：US15154251

申请日：2016-05-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Massimiliano MELIS ,  Francesco Concetto PESCE ,  Stefano NIEDDU ,  Andrea MOLLAR

IPC: F02D1/10 ,  F04B19/22 ,  F02M59/10 ,  F04B49/22 ,  F04B49/06 ,  F02D41/30 ,  F04B17/05

CPC classification number: F02D1/10 ,  F02D41/042 ,  F02D41/3005 ,  F02D41/3845 ,  F02D2041/224 ,  F02D2200/101 ,  F02M59/102 ,  F04B9/042 ,  F04B17/05 ,  F04B19/22 ,  F04B49/03 ,  F04B49/065 ,  F04B49/22 ,  F04B53/14

Abstract: A method for automatically operating a cam-driven pump is disclosed. The pump is monitored to determine whether a specified detachment condition or potential detachment of an actuator of the pump from a driving cam is occurring. The pump is operated in a minimal pressure holding mode to provide a minimal pressure within a working chamber of the pump so as to bias the actuator towards the cam if it is determined that the detachment condition is occurring.

Abstract translation: 公开了一种用于自动操作凸轮驱动泵的方法。 监测泵以确定是否发生指定的脱离状态或泵的致动器从驱动凸轮的潜在脱离。 泵以最小压力保持模式操作，以在泵的工作室内提供最小压力，以便如果确定发生脱离状况，则将致动器偏压到凸轮。