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Crosshead type large-sized uniflow type two-stroke diesel motor

A diesel engine, crosshead type technology, applied in the direction of engine components, combustion engines, engine lubrication, etc., can solve problems such as expensive, and achieve the effect of reducing costs and reducing hydraulic power requirements

Active Publication Date: 2009-04-22
曼能解决方案(曼能解决方案德国股份公司)分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, this means that it is cheaper to build the largest of these engines with piston diameters exceeding about 90 cm using electronically controlled fuel injection and exhaust systems, but the smaller of these engines with piston diameters of less than about 60 cm are less expensive to build Electric fuel injection and exhaust valve actuation systems are much more expensive than camshaft operated engines

Method used

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  • Crosshead type large-sized uniflow type two-stroke diesel motor
  • Crosshead type large-sized uniflow type two-stroke diesel motor
  • Crosshead type large-sized uniflow type two-stroke diesel motor

Examples

Experimental program
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Embodiment Construction

[0065] figure 1 with figure 2 A sectional view of the engine 1 according to the preferred embodiment of the present invention viewed from the engine front and one cylinder viewed from the engine side is shown. The engine 1 is a single-flow low-speed two-stroke crosshead diesel engine of the crosshead type. The engine 1 may be a propulsion engine in a ship or a prime mover in a power plant. These engines typically have 3 to 14 in-line cylinders. The engine 1 is built from a base plate 2 with main bearings for a crankshaft 3 .

[0066] Crankshaft 3 is of the semi-combined type. The semi-combined crankshaft is made of forged or cast steel bellcrank throws connected to the main journal by a shrink fit connection.

[0067] The base plate 2 can be made in one piece or divided into appropriately sized parts according to the production facility. The base plate is constructed of welded cross members with cast steel bearing supports and tall welded stringers - optionally the base...

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Abstract

A large uniflow two-stroke diesel engine of the crosshead type with a plurality of cylinders with at least one exhaust valve (11) per cylinder and one or more fuel injectors (23) per cylinder. The fuel injection is performed under the influence of a source of high-pressure fluid. Potential energy is accumulated by compression in a volume (67) of the high-pressure fluid. Electro-hydraulic valves (39) control the fuel injection that is primarily driven by energy accumulated in the volume (67) of high pressure. The engine has a camshaft (28) for actuation of the exhaust valves (11). Hydraulic piston pumps (37) are driven by the cams (29) on the camshaft. Hydraulic actuators (21) move the exhaust valves (11) in the opening direction with hydraulic fluid received via conduits from the hydraulic piston pumps (37) .

Description

technical field [0001] The present invention relates to a large low-speed single-flow two-stroke diesel engine of the crosshead type, and in particular to engine components related to fuel injection and exhaust valve actuation. Background technique [0002] Large two-stroke diesel engines of the crosshead type are commonly used for ship propulsion and as prime movers in power plants. Not only because of their huge size, but also the structure of these combustion engines is different from other combustion engines. The two-stroke principle and the use of heavy fuel oil with a viscosity of up to 700cSt at 50°C (which does not flow at room temperature) put this engine in a class of its own in the engine world. [0003] In many conventional engines of this type, the exhaust valves and fuel injection system are driven by rotating cams coupled directly to the engine's crankshaft. Two-stroke engines use scavenging ports to control the intake of air into the cylinders, so intake ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/10F02M63/00F01L1/38F01L9/02F01M1/02F02M55/02F02M39/00F02M41/04F01L9/10F01L9/11
CPCY02T10/125F02F7/0007F02M2200/28F01L9/02F01L1/08F01M1/08F02M63/027F02M55/025Y02T10/146F02M2200/24F02M63/0047F01L2105/00F01L9/021F01L2001/34446F01M2011/022F02M39/02F02M39/00F02M53/02F02M63/0225F02M63/0007F02M41/047F02M59/105F02B2075/025F01L1/38F01L2305/00F01L9/11F01L9/10F01M11/02F02M55/02
Inventor 亨里克·维拉德斯·霍曼·克里斯滕森尼尔斯·维德特费尔特·拉斯穆森约翰内斯·弗拉鲁普
Owner 曼能解决方案(曼能解决方案德国股份公司)分公司
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