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Fuel injection arrangement

A technology of fuel injection device and fuel injection valve, which is applied in the direction of fuel injection device, special fuel injection device, charging system, etc., can solve problems such as increasing the complexity of the engine

Active Publication Date: 2015-07-01
WARTSILA FINLAND OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, two separate fuel injection systems add to the complexity of the engine

Method used

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  • Fuel injection arrangement

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Embodiment Construction

[0011] The fuel injection device according to the invention is particularly suitable for large internal combustion engines, such as main or auxiliary engines of ships, engines for offshore applications or engines used at power plants for generating electricity. The invention is particularly advantageous in dual fuel engines which can operate on both liquid and gaseous fuels and where a small amount of liquid pilot fuel is used when the engine is operated in gaseous mode. However, the invention may also be used in other engines in which two or more fuel injectors are used per cylinder.

[0012] figure 1 A schematic diagram of a fuel injection device according to an embodiment of the present invention is shown. The fuel injection device comprises a first fuel injection valve 1 and a second fuel injection valve 2 which are arranged for injecting fuel into a cylinder 11 of a piston engine. The second fuel injection valve 2 is configured to inject a smaller amount of fuel than th...

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Abstract

The fuel injection arrangement for injecting liquid fuel into a cylinder (11) of a piston engine comprises a first fuel injection valve (1), a second fuel injection valve (2) and a pressure medium source (3) for supplying fuel to the fuel injection valves (1, 2). A selector valve (4) is used for choosing which one of the fuel injection valves (1, 2) is used. A first fuel duct (6) connects the first fuel injection valve (1) to the selector valve (4), and a second fuel duct (7) connects the second fuel injection valve (2) to the selector valve (4). The arrangement comprises means (8) for regulating pressure in the second fuel duct (7) between the selector valve (4) and the second fuel injection valve (2).

Description

technical field [0001] The invention relates to a fuel injection device for injecting liquid fuel into cylinders of a piston engine according to the preamble of claim 1 . Background technique [0002] In large internal combustion engines, such as marine or power plant engines, there may be more than one fuel injector per cylinder of the engine. For example, a dual fuel engine may have one injector for operation on liquid fuel and another injector for injecting a small amount of liquid pilot fuel when the engine is operating on gaseous fuel. Also an engine using only liquid fuels can be provided with different injectors for different loads. A problem especially with dual fuel engines is that the quantity of fuel injected by one fuel injector is very small. These engines are therefore usually provided with: a conventional fuel injection pump for supplying fuel at high pressure to the fuel injectors when the engine is operating on liquid fuel and a common rail system for when...

Claims

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Application Information

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IPC IPC(8): F02M45/08
CPCF02M45/086F02M2200/44F02M45/08F02M63/02
Inventor A·温特史黛勒M·特洛伯格
Owner WARTSILA FINLAND OY
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