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Multi-cylinder piston engine

A piston engine and engine technology, applied in the direction of internal combustion piston engine, engine operation, engine components, etc., can solve the problem of not disclosing how to control, and achieve the effect of simple and reliable control mechanism.

Active Publication Date: 2014-02-26
WARTSILA FINLAND OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned patents do not disclose how to control the valves that supply the oxygen-containing gas

Method used

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  • Multi-cylinder piston engine
  • Multi-cylinder piston engine
  • Multi-cylinder piston engine

Examples

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Embodiment Construction

[0022] The embodiments of the present invention will now be described in detail with reference to the drawings.

[0023] figure 1 A piston engine 20 with an introduction device for introducing additional oxygen-containing gas into the cylinder 19 of the engine 20 is schematically shown. The additional oxygen-containing gas is a pressure medium that is introduced into the cylinder 19 of the engine 20 before ignition and after the normal air intake is completed. In a four-stroke engine, this means that the pressure medium is introduced into the cylinder 19 after the intake valve of the cylinder 19 is closed. The pressure medium can be, for example, pressurized air or pure oxygen. Charge air can be produced by a compressor, so it is suitable for many applications. In this specification, the term "extra combustion air" is used for the pressure medium. However, the present invention is not limited to the use of air as the pressure medium.

[0024] in figure 1 In the example, the eng...

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Abstract

The multi-cylinder piston engine (20) comprises means (24) for introducing combustion air into the cylinders (19) of the engine (20) and at least one cam-operated valve lifting device (4) for each cylinder (19) of the engine (20), the valve lifting device (4) being arranged to open a gas exchange valve (24, 25). The engine (20) further comprises an arrangement for injecting additional oxygen containing gas into the cylinders (19) of the engine (20), the arrangement comprising a pressure medium source (18) for supplying the additional oxygen containing gas,an injection valve (10) in connection with each cylinder (19), means (21) for connecting the pressure medium source (18) to the injection valves (10), and a control valve (12) for each cylinder (19) of the engine (20) for controlling the operation of the injection valve (10). Each control valve (12) is arranged to be operated by a gas exchange cam (1) of the respective cylinder (19).

Description

Technical field [0001] The invention relates to a multi-cylinder piston engine according to the preamble of claim 1. Background technique [0002] Large internal combustion engines used for ship propulsion systems or power generation must be able to respond quickly to load changes. One problem with turbocharged internal combustion engines is the so-called turbo lag. Turbo lag refers to the time required for the turbocharger to reach an efficient working state after the load increases. Especially when the initial load is relatively low, the turbocharger cannot respond very quickly to the increased combustion air demand, which causes the engine speed to decrease when the load increases suddenly. Lack of combustion air may also occur when the engine is running under partial load. [0003] A feasible solution to the problem of turbo lag is to use an electric motor to assist the turbocharger. Another solution to reduce turbo lag and increase the amount of available combustion air un...

Claims

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Application Information

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IPC IPC(8): F02B29/00F02B47/06F02B21/00F02N9/04F01L1/14
CPCF01L2760/001F02M2023/008F02D13/0276F01L1/146F02B29/00Y02T10/163F02B41/10F02N9/04F01L2820/034Y02T10/146F02D13/0246F01L2105/00Y02T10/18F02D13/0273F02B21/00F01L2305/00Y02T10/12F01L1/08F01L1/14F02B47/06
Inventor 马格努斯·松德斯滕
Owner WARTSILA FINLAND OY
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