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SWIVELING CONCENTRIC VARIABLE OPENING FUEL INJECTOR WITH CLOSED LOOP CONTROL USING DISTRIBUTED SENSING

IP.com Disclosure Number: IPCOM000236633D
Publication Date: 2014-May-07
Document File: 4 page(s) / 28K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention proposes a technique to inject fuel for a compression ignition direct injection engine. The technique includes a fuel injector for the compression ignition direct injection engine with a multi-layer tip mechanism. The multi-layer tip mechanism varies the injector hole area and capacity to swivel an injector jet with respect to cylinder coordinate frame. The technique provides capability to vary injection duration to change fuel into a cylinder and magnitude and direction of fuel flow with respect to individual cylinder.

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SWIVELING CONCENTRIC VARIABLE OPENING FUEL INJECTOR WITH CLOSED LOOP CONTROL USING DISTRIBUTED SENSING

 

BRIEF ABSTRACT

The invention proposes a technique to inject fuel for a compression ignition direct injection engine. The technique includes a fuel injector for the compression ignition direct injection engine with a multi-layer tip mechanism. The multi-layer tip mechanism varies the injector hole area and capacity to swivel an injector jet with respect to cylinder coordinate frame. The technique provides capability to vary injection duration to change fuel into a cylinder and magnitude and direction of fuel flow with respect to individual cylinder.

KEYWORDS

Compression ignition direct injection engine, injector, hole area, multi layer tip mechanism.

 

DETAILED DESCRIPTION

 

A common concern for an internal combustion engine is non-uniform air fuel mix in a cylinder and output variability from cylinder to cylinder. Cylinder to cylinder variability due to injector wears and exhaust gas recirculation (EGR) mal-distribution, among others impacts efficiency of the cylinder and emissions, such as, NOx for diesel engines. There are various efforts for differential fueling capability or cylinder selective fuel determination instead of efforts to acquire better mixing of EGR before charging the cylinders.

 

A conventional technique includes a common rail pressure and electronically triggered injectors for uniform mixing of air fuel.

Another conventional technique includes pulse width of the injector that fires each cylinder for fuel output variation for individual cylinders.

            Yet another conventional technique includes two injectors per cylinder utilized for spark ignition (SI) engines.

            However, the conventional techniques do not mix air fuel by swiveling and jet profile modification.

 

            Therefore, there is a need for a technique for air fuel mix by swiveling and jet profile modification.

The invention proposes a technique to inject fuel for a compression ignition direct injection engine. The technique includes a fuel injector for the compression ignition direct injection engine with a multi-layer tip mechanism. The multi-layer tip mechanism varies the injector hole area and capacity to swivel a injector jet with respect to cylinder coordinate frame. The technique provides capability to vary injection duration to change fuel into a cylinder and magnitude and direction of fuel flow with respect to individual cylinder. The multi-layer tip mechanism includes an injector tip with small nano holes to ooze out fuel to maintain the fuel film on the tip or part of the injector main body. The multi-layer tip mechanism includes an interface concentric curved plate or layer with a hole pattern moving on the tip of the injector or a moving concentric intermediate layer. The multi-layer tip mechanism also includes an outer mesh like fixed layer with layer with respec...