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Engine device

a technology of engine and exhaust gas, which is applied in the direction of machines/engines, electric control, combustion-air/fuel-air treatment, etc., can solve the problems of affecting environmental preservation and large number of exhaust emissions, and achieve the elimination or minimization of the amount of air needed for combustion, and the effect of increasing trackability

Active Publication Date: 2018-12-13
YANMAR POWER TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to an engine device that can operate in both liquid fuel and gas fuel modes. The invention includes a supercharger, intercooler, main throttle valve, exhaust bypass flow path, exhaust bypass valve, air supply bypass valve, and air supply bypass valve. The invention also includes a control system that can adjust the air-fuel ratio and air pressure to optimize engine performance in both modes. The technical effects of the invention include improved responsiveness in air-fuel ratio control, better air flow amount control, and optimized engine load control.

Problems solved by technology

Exhaust gas discharged from such a diesel engine, unfortunately, contains a large number of exhaust emissions, such as oxides of nitrogen, oxides of sulfur, and particulate matter, that are likely to become harmful substances that impede environmental preservation.

Method used

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Embodiment Construction

[0035]Hereinafter, an embodiment resulting from embodying the present invention will be described on the basis of figures when this embodiment is applied to a pair of propulsion and power-generation mechanisms mounted in a ship of a twin-engine and twin-shaft type.

[0036]First, the outline of a ship will be described. As shown in FIGS. 1 to 3, a ship 1 according to this embodiment includes a hull 2, a cabin 3 (a bridge deck), a funnel 4 (a smoke stack), a pair of propellers 5, and a rudder 6. The cabin 3 is disposed at the aft side of the hull 2. The funnel 4 is disposed behind the cabin 3. The pair of propellers 5 and the rudder 6 are disposed in a lower portion of the rear side of the hull 2. In this case, a pair of skegs 8 are formed integrally with an aft portion of a bottom 7. Propulsion shafts 9 are each rotatably supported by a corresponding one of the skegs 8. The propulsion shafts 9 each drivingly rotate a corresponding one of the propellers 5. The slegs 8 are formed in a sh...

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PUM

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Abstract

An engine device includes a main throttle valve disposed at a portion where an outlet of a supercharger and an inlet of an intercooler are coupled to each other, an exhaust bypass flow path configured to couple an outlet of an exhaust manifold to an exhaust outlet of the supercharger, an exhaust bypass valve disposed in the exhaust bypass flow path, an air supply bypass flow path configured to bypass a compressor of the supercharger, and an air supply bypass valve disposed in the air supply bypass flow path. Within a low load range of a load on the engine device, when the load is lower than a predetermined load, feedback control is performed on the main throttle valve, and when the load is higher than the predetermined load, map control based on a data table is performed on the main throttle valve.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation application of International Application No. PCT / JP2015 / 065455, filed May 28, 2015, which claims priority to Japanese Patent Application No. 2014-118036, filed Jun. 6, 2014, Japanese Patent Application No. 2014-118037, filed Jun. 6, 2014. The contents of these applications are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to an engine device.[0003]Heretofore, in ships, such as a tanker and a transport ship, and land-based power generation facilities, diesel engines have been used as their driving sources. Exhaust gas discharged from such a diesel engine, unfortunately, contains a large number of exhaust emissions, such as oxides of nitrogen, oxides of sulfur, and particulate matter, that are likely to become harmful substances that impede environmental preservation. For this reason, recently, a gas engine, one of engines each serv...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F02D41/00F02B37/18F02M35/10F02M35/104F01N13/10F02B43/02F02B29/04F02D9/02
CPCF02D41/0007F02B37/18F02M35/10157F02M35/104F02D2200/1002F02B43/02F02B29/0406F02D9/02F01N13/10F02D45/00F02B37/16F02D19/06F02D23/00F02D11/105F02D41/0002F02D41/0025F02D41/0027F02D41/1401F02D41/1488F02D41/2422F02D2011/102F02D2041/0022F02D2041/1409F02D2041/142F02D2200/101F02D41/3094F02D19/0642F02D19/10F02D21/08F02D2041/141Y02T10/12Y02T10/40Y02T10/30F02D41/14
Inventor HIROSE, KOICHIOHSARA, TATSUROMURAKAMI, TAISHI
Owner YANMAR POWER TECHNOLOGY CO LTD
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