公开(公告)号：US06189509B1

公开(公告)日：2001-02-20

申请号：US09462836

申请日：2000-01-13

Applicant: Jean-Louis Froment

Inventor： Jean-Louis Froment

IPC: F02M3704

CPC classification number: F02M45/00 ,  F02M45/08 ,  F02M47/02 ,  F02M47/025 ,  F02M47/027 ,  F02M59/366 ,  F02M61/205

Abstract: The invention concerns a device for injecting fuel into a diesel engine using a pulsating flow pump for improving the fuel performance of the engines by controlling the beginning and the end of the injection. It comprises a device (20) controlling the closing and opening of the nozzle needle (5) provided with a discharge circuit (21, 21′) controlled by an electrovalve (25) in branched connection between the high pressure supply conduit (7) and the low pressure return conduit (8). The discharge circuit (21, 21′) comprises a discharge valve (22) whereof the opening and the closing are slowed down by a calibrated orifice (23). The discharge valve (22) located upstream of a discharge orifice (27) provided on the return conduit (8) enables to deviate part of the non-injected fuel flow towards the nozzle needle (5) to exert thereon a closing pressure. Consequently, this results in a better control over the opening and closing of the nozzle needle (5). A calibrated valve (24) ensures that the pressure in the discharge circuit (21) is maintained between two injections. During the injection cycle, the supply of fuel towards the nozzle needle (5) is not impeded by the control device (20) components. The invention is applicable to diesel engines using pulsating injection pumps.

Abstract translation: 本发明涉及一种用于使用脉动流泵将燃料喷射到柴油发动机中的装置，用于通过控制喷射的开始和结束来改善发动机的燃料性能。 它包括一个控制喷嘴针（5）的关闭和打开的装置（20），该装置设置有由电压阀（25）控制的放电回路（21,21'），该电动阀在高压供应管道（7）和 低压回流管道（8）。 放电回路（21,21'）包括排出阀（22），其中开口和关闭通过校准孔（23）减慢。 设置在返回管道（8）上的排放孔（27）上游的排放阀（22）使得能够将部分未喷射的燃料流朝向喷嘴针（5）偏转以在其上施加关闭压力。 因此，可以更好地控制喷嘴针（5）的打开和关闭。 校准阀（24）确保在两次喷射之间保持放电回路（21）中的压力。 在注射循环期间，向喷嘴针（5）供应的燃料不受控制装置（20）组件的阻碍。 本发明适用于使用脉动注射泵的柴油发动机。

公开(公告)号：US4462369A

公开(公告)日：1984-07-31

申请号：US216333

申请日：1980-12-15

Applicant: Jean-Louis Dazzi ,  Jean-Louis Froment

Inventor： Jean-Louis Dazzi ,  Jean-Louis Froment

IPC: F02M47/02 ,  F02B19/00 ,  F02M59/00

CPC classification number: F02M47/027 ,  F02M47/025 ,  Y10T137/87893

Abstract: A fuel injection apparatus for controlling fuel injectors for internal combustion engines which injectors remain normally shut as a result of a high fuel pressure applied on either side of injector fuel nozzles. The apparatus of the present invention includes a first slide valve member which, by sliding from one extreme position to another, is able to lower the pressure below a fuel nozzle associated with a fuel injector to start a fuel injection cycle in that injector. The apparatus also includes a second slide valve member which, by sliding from one extreme position to another, is able to increase the pressure below the fuel nozzle to end the fuel injection cycle and control the duration of the fuel injection cycle as well as the flow rate of the injected fuel. The first and second slide valve members return to their initial positions after two consecutive fuel injection cycles.

Abstract translation: 用于控制用于内燃机的燃料喷射器的燃料喷射装置，由于施加在喷射器燃料喷嘴两侧的高燃料压力，喷射器保持通常关闭。 本发明的装置包括第一滑阀构件，其通过从一个极限位置滑动到另一极限位置能够降低与燃料喷射器相关联的燃料喷嘴下方的压力，以在该喷射器中开始燃料喷射循环。 该装置还包括第二滑阀构件，其通过从一个极限位置滑动到另一极限位置能够增加燃料喷嘴下方的压力以结束燃料喷射循环并且控制燃料喷射循环的持续时间以及流量 注入燃料的速率。 第一和第二滑阀构件在两个连续的燃料喷射循环之后返回到它们的初始位置。