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Method of controlling a dual fuel engine and dual fuel engine

A dual-fuel engine and engine technology, applied in the direction of combustion engine, internal combustion piston engine, engine control, etc., can solve problems such as knocking without consideration

Inactive Publication Date: 2016-05-04
GE GLOBAL SOURCING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] A disadvantage of this prior art is that the ignition retardation ("retardignition") is mandatory set as a reaction to knock detection
This regulation strategy does not take into account that knocking can exist for many different reasons, so it is not always targeted

Method used

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  • Method of controlling a dual fuel engine and dual fuel engine
  • Method of controlling a dual fuel engine and dual fuel engine
  • Method of controlling a dual fuel engine and dual fuel engine

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Embodiment Construction

[0024] figure 1 A first exemplary embodiment of the method is shown as a schematic flow diagram. A distinction is made between the two branches in the event of knocking. While in the left branch, the knock intensity is above the first threshold (i.e. a knock signal indicative of knock exceeding the first intensity is detected), it is below the second threshold (i.e. it is detected indicating a second intensity Knock signal of the knock below). For this purpose, the quantity of the first fuel delivered to the combustion chamber should be increased.

[0025] As a result, the increased power energy input caused by increasing the quantity of the first fuel is compensated by a reduction in the power energy share of the second fuel.

[0026] Possible measures for reducing the kinetic energy share of the second fuel are, for example (individually or in any combination) reducing the amount of the second fuel, delaying the injection moment of the second fuel, changing the injection ...

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Abstract

In a method of controlling a dual fuel engine in which power in the form of a first gaseous fuel and in the form of a self-igniting second fuel is fed to at least one combustion chamber (4), a knock signal representative of the combustion chamber (4) is detected. When a knock signal indicating a knock of at least a first intensity is detected, the amount of first fuel fed to the combustion chamber (4) of the engine (1) is increased, the increased introduction of power into the combustion chamber (4) caused by the increase in the amount of first fuel being compensated by a corresponding reduction in the power contribution of the second fuel. When a knock signal indicating a knock of at least a second intensity greater than the first intensity is detected, the amount of first fuel is reduced.

Description

technical field [0001] The invention relates to a method for regulating a dual fuel engine and to a dual fuel engine. Background technique [0002] Such engines can be operated in pure diesel or heavy oil operation or in so-called dual-fuel mode, in which the predominant fuel type is gas and diesel or heavy oil is only used for ignition assistance. Such an internal combustion engine is known from US Pat. No. 8,671,911 B2. [0003] This publication proposes an arrangement of a knock sensor by means of which the presence of knock can be detected. Depending on the detection signal, the regulation unit can regulate the amount of gaseous and liquid fuel delivered to the combustion chamber of the internal combustion engine. [0004] A disadvantage of this prior art is that, as a reaction to the knock detection, an ignition delay ("retardignition") is forced to be set. This regulation strategy does not take into account that knocking can occur for many different reasons, so it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/08F02D41/30F02D41/04
CPCF02D19/0647F02D19/081F02D19/10F02D19/105F02D19/061F02D35/027F02D41/0025F02D41/3047F02D41/0007Y02T10/30F02D41/0027
Inventor D·伊姆霍夫H·绍姆贝尔格M·J·莱姆克
Owner GE GLOBAL SOURCING LLC
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