Unlock instant, AI-driven research and patent intelligence for your innovation.

Dual fuel injector and fuel system

An injector and dual-fuel technology, applied in fuel injection devices, special fuel injection devices, charging systems, etc.

Active Publication Date: 2013-12-18
CATERPILLAR INC
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design has been shown to work, but there is always room for improvement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dual fuel injector and fuel system
  • Dual fuel injector and fuel system
  • Dual fuel injector and fuel system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] refer to figure 1 , shows an engine system 10 including a compression ignition diesel engine 12 according to one embodiment. The engine 12 includes a housing 14 having cylinders 16 therein, and will typically include a plurality of such cylinders, although only one is shown. The engine system 10 also includes a dual fuel system 18 having a liquid fuel supply 20 and a gaseous fuel supply 28 . Liquid fuel supply 20 may include a pressurization mechanism 22, such as a pump, that is fluidly connected to tank 26 and configured to pressurize liquid fuel, such as petroleum distillate diesel fuel, from tank 26 and to discharge the liquid Fuel is delivered to liquid fuel common rail 24 . Gaseous fuel supply 28 may also include, for example, a tank 34 for storing liquefied gaseous fuel, such as natural gas, and a pressurization mechanism 30 configured to pressurize and supply the gaseous fuel to gaseous fuel common rail 32 . A mechanism for converting the stored liquefied gase...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A dual fuel injector in a dual common rail fuel system includes an injector body defining a liquid fuel supply passage to a liquid fuel nozzle outlet, and a gaseous fuel supply passage to a gaseous fuel nozzle outlet. A liquid fuel needle check is movable within the injector body and has an opening hydraulic surface exposed to a fuel pressure of a liquid fuel common rail. A gaseous fuel needle check is positioned side by side with the liquid fuel needle check and has an opening hydraulic surface exposed to the fuel pressure of the liquid fuel common rail. Sensitivity to differences in gaseous fuel rail pressure and liquid fuel rail pressure is reduced by the design.

Description

technical field [0001] The present invention relates generally to dual fuel systems in which liquid fuel and gaseous fuel are injected into a combustion chamber of an engine during an engine cycle, and more particularly to controlling a gaseous fuel needle stop in a fuel injector via the pressure of the liquid fuel on and off. Background technique [0002] Gaseous fueled engines are known to have clean burning capabilities relative to their liquid fueled compression ignition counterparts. However, it is also notorious that gaseous fuels are difficult to achieve successful ignition. Some gaseous fueled engines utilize spark plugs, while others utilize a small amount of pilot fuel, such as distillate diesel fuel, which is compression ignited to initiate combustion of a larger main charge of the gaseous fuel, such as natural gas. In these latter engines, the gaseous fuel may be supplied to the engine intake manifold, or metered directly into individual cylinders, where the ga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02M43/04F02M47/02
CPCF02M43/04Y02T10/30F02M21/0254F02M21/0209F02M21/0257F02M21/026F02M21/0218F02M21/0251F02M21/0215F02M21/0263F02M21/0212F02M21/0248F02M2200/44
Inventor C·A·布朗D·R·科尔德伦
Owner CATERPILLAR INC