阅读说明：本技术 用于实现碳氢化合物喷射的装置 (Device for carrying out hydrocarbon injection ) 是由 L.M.奈克 N.舍蒂 R.S.伊曼妞尔 于 2019-06-27 设计创作，主要内容包括：本文公开了一种用于实现碳氢化合物喷射的装置(100)。该装置(100)被定位在柴油机微粒过滤器(DPF 102)的上游。DPF(102)沿排气路径定位,并且至少包括：入口端口(104),其与高压燃料喷射泵流动连通；加压室(108),其包括往复式柱塞(110)。加压室(108)适于从入口端口(104)接收燃料,并且出口端口(112)适于从加压室(108)接收燃料并将燃料输送到DPF(102)的配量模块。(An apparatus (100) for enabling hydrocarbon injection is disclosed herein. The device (100) is positioned upstream of a diesel particulate filter (DPF 102). The DPF (102) is positioned along an exhaust path and includes at least: an inlet port (104) in flow communication with the high pressure fuel injection pump; a pressurization chamber (108) including a reciprocating plunger (110). The pressurization chamber (108) is adapted to receive fuel from the inlet port (104), and the outlet port (112) is adapted to receive fuel from the pressurization chamber (108) and deliver the fuel to a dosing module of the DPF (102).)

1. An apparatus (100) for effecting hydrocarbon injection, the apparatus (100) being positioned upstream of a Diesel Particulate Filter (DPF) (102), the DPF (102) being positioned along an exhaust path, the apparatus (100) comprising at least:

an inlet port (104) in flow communication with a high pressure fuel injection pump;

a pressurization chamber (108) including a reciprocating plunger (110), the pressurization chamber (108) adapted to receive fuel from the inlet port (104); and

an outlet port (112) adapted to receive fuel from the pressurization chamber (108) and deliver the fuel to a dosing module of the DPF (102).

2. The apparatus (100) of claim 1, wherein the reciprocating plunger (110) is driven by an engine crankshaft.

Technical Field

The present disclosure relates to the field of fuel injector assemblies.

Background

Control of exhaust gas from engines has become important in view of strict emission regulations around the world. Methods employed to reduce emissions are Selective Catalytic Reduction (SCR) and Diesel Particulate Filters (DPFs) for removing particulate matter. The subject of interest here is DPF technology. To ensure that the particulates are oxidized at a sufficient rate, the filter must be operated at a sufficient temperature, and one of the methods for increasing the exhaust temperature is by combustion of fuel in the exhaust system. An electrically-powered feed pump positioned near the exhaust system draws fuel from a fuel tank and injects the fuel during DPF regeneration. Since DPF regeneration only occurs when there is a demand to control particulate emissions, it is not economical to use an electric feed pump for that purpose. There is therefore a need for: fuel is made available during dosing (dosing) requests without the use of a separate electric feed pump.

Drawings

Various modes of the invention are disclosed in detail in the specification and illustrated in the accompanying drawings:

FIG. 1 illustrates an apparatus for effecting hydrocarbon injection.

Detailed Description

FIG. 1 illustrates an apparatus 100 for effecting hydrocarbon injection. The device 100 is positioned upstream of a Diesel Particulate Filter (DPF) 102. The DPF102 is positioned along the exhaust path and includes at least: an inlet port in flow communication with the high pressure fuel injection pump; a pressurized chamber including a reciprocating plunger 110. The pressurization chamber 108 is adapted to receive fuel from the inlet port 104, and the outlet port 112 is adapted to receive fuel from the pressurization chamber 108 and deliver the fuel to the dosing module of the DPF 102.

The structural features of the device 100 will be explained in more detail. The device 100 is positioned upstream of a diesel particulate filter (DPF 102), the DPF102 being positioned along the exhaust path. The apparatus 100 includes an inlet port 104 in flow communication with the high pressure fuel injection pump. The function of the inlet port 104 is to receive fuel from the high pressure fuel injection pump. The fuel received from the high pressure fuel injection pump is typically excess fuel that cannot be delivered to the common rail and/or injectors. Excess fuel is received by the device. The apparatus 100 includes a pressurization chamber 108. The pressurization chamber 108 includes a reciprocating plunger 110. Plunger 110 may be driven by the engine crankshaft or by supplying pressurized lubricating oil or air. The apparatus 100 also includes an outlet port 112 adapted to receive fuel from the pressurization chamber 108 and deliver the fuel to the dosing module of the DPF 102.

During operation, fuel from the fuel tank is delivered to the high-pressure fuel injection pump for pressurization. A part of the fuel from the high-pressure fuel injection pump is delivered to the common rail. The flow path from the fuel injection pump is in flow communication with the device. Fuel flows through the flow path and to the inlet port 104. The inlet port 104 is in flow communication with the high pressure fuel injection pump. The pressurization chamber 108 is adapted to receive fuel from the inlet port 104 and includes a reciprocating plunger 110. The reciprocating plunger 110 may receive motion from the engine crankshaft. The fuel received in the pressurization chamber 108 is pressurized by the plunger 110, and the fuel flows via the outlet port 112 and is delivered to the dosing module of the DPF 102. By using the above-mentioned device it is possible to use fuel from the high-pressure fuel injection pump to meet the dosing requirement at the exhaust. This eliminates the need for a separate electric feed pump at the exhaust for injecting fuel into the dosing module for DPF102 regeneration.

It should be understood that the embodiments explained in the above description are merely illustrative and do not limit the scope of the invention in terms of the type of injector used and the materials used for the sealing gasket. Many such embodiments and other modifications and variations of the embodiments explained in the specification are contemplated. The scope of the invention is limited only by the scope of the claims.