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Fuel injection device and method of operating a piston engine

A technology of fuel injection device and piston engine, which is applied in the direction of fuel injection device, internal combustion piston engine, special fuel injection device, etc., can solve problems such as increasing manufacturing cost, and achieve the effect of reducing heat load, promoting operation, and increasing output power

Active Publication Date: 2022-01-14
WARTSILA FINLAND OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This naturally increases the manufacturing cost

Method used

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  • Fuel injection device and method of operating a piston engine
  • Fuel injection device and method of operating a piston engine
  • Fuel injection device and method of operating a piston engine

Examples

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Embodiment Construction

[0041] figure 1 and figure 2 A fuel injection unit 1 for a large internal combustion engine, such as an engine used in a ship or a power plant, is shown. The cylinder bore of the engine is at least 150mm. The engine is a multi-cylinder four-stroke piston engine. The engine may be operated using liquid fuel injected directly into the cylinders of the engine. Each cylinder of the engine is provided with a piston arranged to move in a reciprocating manner within the cylinder.

[0042] Each cylinder of the engine is provided with a similar fuel injection unit 1 . exist image 3 middle, figure 1 and figure 2The fuel injection unit 1 is shown connected to a cylinder head 21 of an internal combustion engine. Figure 1 to Figure 3 The fuel injection unit 1 is arranged to receive pressurized fuel directly from a fuel injection pump 22 . The fuel injection unit 1 comprises an injector part 20 , an intermediate part 30 , a control valve 9 and a pneumatic actuator 11 . The fue...

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PUM

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Abstract

A fuel injection device for a cylinder (33) of a four-stroke piston engine, the fuel injection device comprising a first fuel injection nozzle (3) and a second fuel injection nozzle (4), the nozzle hole of the second nozzle (4) The total cross-sectional area of ​​(4a) is greater than the total cross-sectional area of ​​the nozzle hole (3a) of the first nozzle (3), and the nozzle hole (3a) of the first nozzle (3) is arranged so that it is aligned with the direction towards the cylinder (33) A larger portion of the fuel injected through the first nozzle (3) is injected toward the exhaust valve side (26) than the intake valve side (25), and the nozzle hole (4a) of the second nozzle (4) It is arranged such that a larger portion of the fuel injected through the second nozzle (4) is injected towards the intake valve side (25) than towards the exhaust valve side (26).

Description

technical field [0001] The invention relates to a fuel injection device for a cylinder of a four-stroke piston engine. The invention also relates to a method of operating a piston engine. Background technique [0002] A common trend in the development of piston engines is an ever-increasing ratio between output power and cylinder volume. This helps to improve the thermal efficiency of the engine. However, a consequence of this development is that modern four-stroke engines are subject to high thermal loads. In some cases, the thermal load on the components of the combustion chamber may become a limiting factor, which prevents an increase in the power output of the engine. Alternatively, substantial modifications to the engine design may be required, for example, in the form of a more efficient cooling system, or the material of some components needs to be replaced by a material with good heat resistance. This naturally increases the manufacturing cost. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M45/08F02B31/08F02M61/18F02B23/06F02B23/10F02D41/30F02M61/14
CPCF02M45/086F02D41/3094F02M61/14F02B23/0663F02M2200/44F02M61/1813F02M61/1826Y02T10/12F02D41/38F02D2041/389
Inventor 阿尔贝托·卡法利K·埃克隆J·恩格斯特罗姆F·朗伦德J·瑟帕
Owner WARTSILA FINLAND OY