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Dual fuel injector with crossover valve

A fuel injector and dual-fuel technology, applied in low-pressure fuel injection, fuel injection devices, charging systems, etc., can solve the problems of failure to disclose the operation of dual-fuel engines

Inactive Publication Date: 2014-08-27
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the '566 patent fails to disclose the operation of a dual fuel engine when required to run on diesel fuel only

Method used

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  • Dual fuel injector with crossover valve
  • Dual fuel injector with crossover valve
  • Dual fuel injector with crossover valve

Examples

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Embodiment Construction

[0015] Reference will now be made in detail to the exemplary embodiments, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0016] figure 1 A schematic diagram of components of a fuel system according to one embodiment is shown. The dual fuel common rail fuel system 10 utilizes dual fuel common rail injectors 12 . The dual fuel system 10 includes a plurality of fuel injectors 12, where each fuel injector includes an injector body 70 having an injector body 70 positioned for injecting gaseous fuel and / or liquid fuel directly into an associated fuel injector. Tip member 71 in a corresponding combustion chamber of an engine cylinder (not shown). Diesel fuel source 14 contains diesel fuel. Diesel pump 16 draws diesel fuel through diesel supply line 18 ; pressurizes the diesel fuel; and delivers the pressurized diesel fuel to diesel fuel rail 20 . A filter...

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Abstract

The present disclosure is directed to a fuel circuit (500) of a fuel injector (12) that includes a first channel, a second channel, and a valve (80). The first channel is configured to receive a first fuel and define a flow path for the first fuel. The second channel is configured to receive a second fuel and define a flow path for the second fuel. The valve (80) is in fluid communication with the first channel and the second channel. The valve (80) is adapted to direct the second fuel to the first channel when a pressure in the first channel reaches a predetermined level.

Description

technical field [0001] The present invention generally relates to systems and methods for regulating the flow of fuel in a limp operating mode of a dual fuel engine. Background technique [0002] In a dual fuel engine, fuel injectors are used to inject liquid fuel, such as diesel fractions, into the engine cylinders, and a second system is responsible for delivering a second type of fuel, such as natural gas. For such dual fuel engines, it is desirable to be able to inject two different amounts of liquid fuel. When the engine is operating in dual fuel mode, a small pilot injection of diesel fuel is utilized to assist in igniting the bulk of the gaseous fuel. However, when gaseous fuel is not available or the engine is required to run on diesel only for other reasons, only larger injections of diesel are made. [0003] For dual fuel injectors configured to operate on both natural gas fuel and diesel fuel (as the pilot), it is sometimes desirable to be able to operate on die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M43/00F02D19/06F02M61/16F02M61/04
CPCF02M69/50F02M43/00F02M21/0275Y02T10/36F02M21/02F02M63/029Y02T10/32F02M43/04Y02T10/30
Inventor C·A·布朗X·丁H·金M·米塔尔M·F·索马斯
Owner CATERPILLAR INC
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