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Engine and method for controlling engine

An engine and control value technology, applied in the field of EGR system, which can solve the problem of unstable operation of the engine main body

Active Publication Date: 2019-04-26
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the engine is switched from the normal mode to the EGR mode, the operation of the main engine may sometimes become unstable.

Method used

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  • Engine and method for controlling engine
  • Engine and method for controlling engine
  • Engine and method for controlling engine

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Embodiment Construction

[0037] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment, Moreover, when there exist several embodiment, the embodiment which combined each embodiment is also included.

[0038] figure 1 is a schematic diagram showing a diesel engine equipped with an EGR system, figure 2 It is a schematic configuration diagram showing each part of a diesel engine. image 3 It is a block diagram showing a schematic configuration of each control device of the engine.

[0039] Such as figure 1 As shown, the marine diesel engine 10 of this embodiment includes an engine main body (engine) 11 , a supercharger 12 , and an EGR system 13 .

[0040] Such as figure 2 As shown, although not shown, the engine main body 11 is a propulsion internal combustion engine (main internal combustion engine) that rotationally drives a propulsion propeller via a propeller shaft. T...

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Abstract

Provided are an engine and a method for controlling an engine, with which an engine body can be operated in a stable manner. This engine is provided with an engine body, an engine control device thatcontrols the actions of the engine body, and an EGR system that recirculates some of the exhaust gas expelled from the engine body as recirculated gas to the engine body. The EGR system is provided with an exhaust gas recirculation line that recirculates some of the exhaust gas expelled from the engine body as recirculated gas to the engine body, an EGR control device that controls the recirculated gas supplied to the engine via the exhaust gas recirculation line and transmits and receives information to and from the engine control device, and a transfer coefficient calculation device that outputs information about a transfer coefficient that increases as time elapses. When the supply of exhaust gas from the exhaust gas recirculation line to the engine body is initiated, the transfer coefficient calculation device initiates the increase in the transfer coefficient and transmits the information about the transfer coefficient to the EGR control device and the engine control device.

Description

technical field [0001] The present invention relates to an engine including an engine body and an EGR system that supplies exhaust gas from the engine body to the engine body, and an engine control method. Background technique [0002] As a system for reducing NOx in exhaust gas discharged from an engine main body, there is an exhaust gas recirculation (EGR) system. This EGR system returns a part of the exhaust gas discharged from the combustion chamber of the internal combustion engine to the combustion chamber as combustion gas (for example, Patent Document 1). Therefore, the oxygen concentration of the combustion gas is lowered, and by retarding the reaction between fuel and oxygen, that is, the speed of combustion, the combustion temperature is lowered, and the amount of NOx generated can be reduced. [0003] In addition, Patent Document 2 describes a dual-fuel engine capable of switching between a diesel mode that operates only on petroleum and an operation mode that o...

Claims

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Application Information

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IPC IPC(8): F02M26/06F02D21/08
CPCF02D21/08F02M26/06F02M26/46F02M26/52
Inventor 中川贵裕平冈直大伊藤和久
Owner MITSUBISHI HEAVY IND LTD
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