KR20130127926A - A cylinder lubrication device for a large slow running two-stroke diesel engine and method of operating the cylinder lubrication system - Google Patents

Abstract

A cylinder lubricating device (1) for a diesel multi cylinder engine with two-stroke is disclosed. A diesel multi cylinder engine with two-stroke comprises a reciprocating piston (120) with a piston ring which slides on the inner surface of a cylinder liner (111) in each cylinder (110). The cylinder lubricating device (1) spreads lubricants on the surface of the cylinder liner (111) at an accurate amount through a plurality of injection parts (112) arranged at the same height around the cylinder (110) based on a reciprocating motion of the piston (120). The cylinder lubricating device (1) comprises a plurality of piston pumps with injection plungers (30) which slide from a start position (S) to a finish position (E) in an injection cylinder (20); a common drive (31) with linear actuators (41, 46) for driving the injection plungers (30) at the same time; and the injection plunger (30) which has an overall stroke from the start position (S) to the finish position (E). The diameter of the injection cylinder is formed to provide the lubricants at the accurate amount as the injection plunger (30) moves from the start position to the finish position through partial strokes of various time slots.

Description

TECHNICAL FIELD [0001] The present invention relates to a cylinder lubrication apparatus and a cylinder lubrication apparatus for a large-sized low-speed two-stroke diesel engine, and more particularly to a cylinder lubrication apparatus and a cylinder lubrication apparatus,

The present invention relates to a cylinder lubrication apparatus and a cylinder lubrication apparatus for a large-sized low-speed two-stroke diesel engine.

More particularly, the present invention relates to a cylinder lubrication apparatus for a large low-speed two-stroke diesel engine having a plurality of piston pumps simultaneously moving by a common drive.

The present invention also relates to a hydraulic actuating cylinder lubrication system and to an operating control method for the administration of cylinder oil according to engine design specifications and according to engine operating conditions, loads and user requirements.

In the field of large two-stroke diesel engines with crossheads, such as prime movers for power plants or marine vessels, the cylinders and pistons of the engines are particularly precise and require extensive lubrication. Typically, such an engine is driven by the least expensive type of fuel, usually heavy fuel oil. Heavy oil introduces large amounts of particles into the cylinder that are harmful to the engine, such as sulfur, which forms sulfuric acid in the combustion process. Therefore, there is a need to protect the cylinder wall from attack by sulfuric acid by applying a cylinder lubricant having a low pH value to the inner surface of the cylinder liner to relieve the acid (high pH) combustion gas component. Cylinder lubricant is relatively expensive, and cylinder lubricant applied to the inner surface of the cylinder liner is consumed during engine operation, thus requiring a constant new supply during engine operation. The consumption of cylinder lubricant is an important factor in the operation of a large low speed 2-stroke diesel engine with a crosshead. Therefore, effective and accurate lubrication of the engine cylinder and piston is required to ensure adequate protection of the engine cylinder and piston and minimal consumption of expensive cylinder lubricant.

Cylinder lubricant consumption represents a high cost for engines operating at nominal guiding feed rates, and especially for large engines (600-1200 cm bores), and even a drastic reduction in the amount of lubricant per capita, In the normal use of the lubricant. The injection of lubricating fluid is administered according to the fuel properties as well as the engine load and engine condition. The fuel injection is usually timed so that injection is periodically made against the rotation of the engine and when the engine piston passes through a lubricating quill. The injection quill is evenly distributed around the engine cylinder and at a position corresponding to the engine piston position at a certain stage of the engine cycle, such as the end of the expansion of the combustion gas. Lubrication fluid is injected when the engine piston is located at the height of the quill, which increases the risk of burning expensive lubrication fluids (when injected into the upper part of the piston) and of lubrication fluid (when the lubrication fluid is located below the piston) Because it reduces the risk.

It is therefore an object of the present invention to reduce the cylinder lubricant dosage while maintaining a satisfactory piston / liner wear rate and maintaining or improving the time between engine maintenance. Reduced lubricant consumption also has a positive impact on the environment as emissions are lower.

DE 197 43 955 discloses a cylinder lubrication apparatus according to the preamble of claim 1. This cylinder lubrication apparatus forms one variable length injection stroke and then the injection plunger returns to its starting position again. The variable length stroke is not the entire stroke that the injection plunger can reach, and therefore the wear of the components such as the injection plunger, the injection cylinder and the actuator is concentrated in the first part of the injection stroke.

A typical lubrication system is based on the principle of injecting a certain amount of lubricant into the cylinder through multiple injection points or quills for every fourth (or all fifth or sixth) rotation of the engine. This is often expressed as the minimum time required for a conventional lubrication apparatus to prepare to perform another injection of lubricant after one injection. In conventional pneumatic and hydraulic systems, this time is determined by limiting the rate at which the injection chamber can be refilled before injection and by limiting the control of the dose and rate of injection. Thus, the injection takes place with excess lubricating oil, which leads to an increase in consumption of the lubricating oil.

On the other hand, if a reduction in consumption is required, the cylinder lubricant must be injected into the cylinder at the exact position and time at which the effect is optimal. This is not always possible with current lubrication devices.

In this context, it is an object of the present invention to provide an engine with a lubrication device and a lubrication device that overcomes or at least reduces the problems of the prior art. It is still another object of the present invention to provide an alternative lubrication apparatus and a method of operating the cylinder lubrication apparatus.

This object is achieved by providing a cylinder lubrication system for a large low speed two-stroke diesel multi-cylinder engine, wherein the large low speed two-stroke diesel multi cylinder engine has, in each cylinder, a piston ring sliding on the inner surface of the cylinder liner So that the cylinder lubrication apparatus provides the cylinder liner inner surface with a precise dose of the cylinder lubricant per revolution of the piston or a predetermined rotation of the piston through a plurality of injection points distributed at the same height around the circumference of the cylinder And the cylinder lubrication apparatus comprises a plurality of piston pumps each having an injection plunger slidably movable in the injection cylinder between a start position (S) and an end position (E), a linear actuator for simultaneously driving all the injection plungers A common drive including a start position S and an end position E, Wherein the diameter of the injection cylinder and the length of the entire stroke of the injection plunger are such that before the injection plunger is returned to the start position the injection plunger has a plurality of injection plungers in the direction from the start position to the end position So that a precise dosage is delivered by moving the injection plunger over a portion of the maximum stroke.

By selecting the diameter of the injection cylinder and the length of the entire stroke, i. E. Displacement volume, so that the portion of the appetizer stroke corresponds to a single dosage, the cylinder device can be operated with multiple partial strokes before the return / fill stroke is performed. Thus, the injection plunger can always perform the entire stroke in both directions, and the entire stroke can be performed in the injection direction by a plurality of partial strokes. Thus, wear of the injection plunger, wear of the injection cylinder, and wear of the actuator drive are evenly distributed over the length of the entire stroke, thereby increasing the life of the cylinder lubrication apparatus.

In one embodiment, the common drive includes a double-acting hydraulic or electric actuator including a first hydraulic or electric actuator for moving the injection plunger in a direction from a start position to an end position, And a second hydraulic or electric actuator for moving the plunger.

By providing the actuator for the return / refill stroke, the return stroke can be performed more quickly and reliably than the helical spring used in the prior art cylinder lubrication apparatus.

In one embodiment, the common drive includes a plunger connector and a double-acting linear actuator arranged to move the plunger simultaneously in the injection cylinder, the double-acting linear actuator being connected to the plunger, And a second hydraulic linear actuator for moving the injection plunger in a direction toward the starting position at the end position.

In one embodiment, the cylinder lubrication apparatus comprises an electronic control device configured to actuate the first actuator to move the injection plunger over a variable length partial stroke for each time a precise dosage of cylinder lubricant is delivered to the cylinder Wherein the electronic control device is configured to actuate a second hydraulic linear actuator for returning the injection plunger to their starting position when the injection plunger reaches their final position.

In one embodiment, the cylinder lubrication apparatus further comprises a position sensor arranged to detect the position of the injection plunger in the injection cylinder and in communication with the electronic control unit.

In one embodiment, the electronic control unit determines the dosage of the lubricant currently required or information on the dosage of the lubricant currently required, and the electronic control unit controls the operation of the first actuator so that the determined or received And to move the plunger in a partial stroke over a distance corresponding to the dose of lubricant required.

In one embodiment, the electronic control device is configured to control the length of the partial stroke of the injection plunger based on engine operating conditions, and preferably to adjust the stroke length for engine operating conditions for each injection event.

In one embodiment, the electronic control device determines, based on the measured movement of the injection plunger, how much the injection plunger has moved in the last partial stroke, and the electronic control device has a desired length of the next stroke of the injection plunger If determined, compensates for the deviation from the desired value for the last partial stroke.

In one embodiment, the cylinder lubrication apparatus further comprises a hydraulic valve connected to the first hydraulic linear actuator and connected to the second hydraulic linear actuator, wherein the hydraulic valve is configured to selectively connect the first hydraulic linear actuator to a hydraulic source And selectively connect the second hydraulic linear actuator to the hydraulic source.

In one embodiment, the hydraulic valve is an on / off valve and the electronic control device controls the partial stroke of the injection plunger by controlling the length of time during which the on / off valve connects the first hydraulic linear actuator to the hydraulic source .

In one embodiment, the electronic control device is configured to instruct the on / off valve to connect the second hydraulic linear actuator to the hydraulic source when the injection plungers reach their final position, So that the plungers are returned to their starting positions.

In one embodiment, the on / off valve is configured to connect the second hydraulic linear actuator to the tank and vice versa while the first hydraulic linear actuator is connected to the hydraulic source.

In one embodiment, the hydraulic valve is a proportional valve and the electronic control device is configured to regulate a rate control profile of movement of the injection plunger in a partial stroke.

In one embodiment, the electronic control device and the cylinder lubrication apparatus are configured to control the length of the partial stroke and / or the velocity of the injection plunger based on specific cylinder operating conditions.

The above object is also achieved by providing a large low speed two-stroke diesel engine with a crosshead, wherein the large low speed two-stroke diesel engine with the crosshead comprises a plurality of cylinders, A piston, each of said pistons comprising at least two piston rings, and a cylinder lubrication apparatus as described above.

In one embodiment, the electronic control apparatus is both an engine control system and a control system for a cylinder lubrication apparatus.

The above object is also achieved by providing a method for operating a cylinder lubrication apparatus for a large low speed two-stroke diesel multi-cylinder engine, wherein the large low speed two-stroke diesel multi-cylinder engine comprises, in each cylinder, The cylinder lubrication apparatus is provided with a cylinder lubrication apparatus for supplying a precise amount of the cylinder lubricant per revolution of the cylinder or a predetermined rotation of the cylinder through a plurality of injection points distributed at the same height around the circumference of the cylinder, The cylinder lubrication apparatus comprising a plurality of piston pumps each having an inlet plunger slidably movable in the inlet cylinder between a start position and an end position, And the start position and the end position < RTI ID = 0.0 > A common drive including a linear actuator for simultaneously driving all of the injection plungers in both directions between a first position and a second position, the method comprising the steps of: Simultaneously moving the injection plunger by a linear actuator and moving the injection plunger simultaneously by a linear actuator in one entire stroke from an end position to a start position when the injection plunger reaches their end position .

In one embodiment, the method includes determining or receiving a dosage of lubricant presently required, and determining the amount of lubricant to be delivered to the linear actuator < RTI ID = 0.0 > .

In one embodiment, the method further comprises the steps of measuring movement of the injection plunger in the last partial stroke and instructing the linear actuator to move to the next partial stroke, particularly when the injection plunger reaches the end of their stroke, Compensates for the deviation from the desired value for the last partial stroke.

In one embodiment, the average speed of the injection plunger during the last stroke is determined by comparing the duration of the last partial stroke with the duration of the last partial stroke, and the operating time for the next partial stroke is determined by the injection It is based on the average speed of the plunger.

In one embodiment, the method further comprises adjusting the length of the partial stroke of the injection plunger in response to engine operating conditions.

In one embodiment, the method further comprises adjusting the length of the partial stroke of the injection plunger for each injection event.

In one embodiment of the method, the cylinder lubrication apparatus includes a hydraulic valve connected to a first hydraulic linear actuator and connected to a second hydraulic linear actuator, the method comprising: selectively connecting a first hydraulic linear actuator to a hydraulic source And selectively connecting the second hydraulic linear actuator to the hydraulic source.

In one embodiment, the method further comprises the steps of pressing the first hydraulic linear actuator to move the injection plunger over a portion of the total stroke length, and pressing the first hydraulic linear actuator to return the plunger only when the injection plunger reaches their end position. 2 < / RTI > hydraulic linear actuator.

In one embodiment of the method, the hydraulic valve is an on / off valve and the method controls the partial stroke of the injection plunger by controlling the length of time during which the on / off valve connects the first hydraulic linear actuator to the hydraulic source .

In one embodiment, the method further comprises the steps of: moving the plunger in a continuous variable length stroke regulated for each injection event in accordance with the engine operating conditions, and for a predetermined time corresponding to a predetermined dose of lubricating fluid, And controlling the hydraulic on / off valve by providing a time pulse to the on / off valve to open the hydraulic on / off valve.

The above object is also achieved by providing a method for operating a cylinder lubrication apparatus for a large low speed two-stroke diesel multi-cylinder engine, wherein the large low speed two-stroke diesel multi-cylinder engine comprises, in each cylinder, The cylinder lubrication apparatus is provided with a cylinder lubrication apparatus for supplying a precise amount of the cylinder lubricant per revolution of the cylinder or a predetermined rotation of the cylinder through a plurality of injection points distributed at the same height around the circumference of the cylinder, Wherein the cylinder lubrication apparatus comprises a plurality of piston pumps each having an injection plunger slidably moveable in the injection cylinder, a common drive including a linear actuator for simultaneously driving all the injection plungers, And the position of the common drive or injection plunger And a position sensor arranged to emit,

The method comprises the steps of determining a desired length of the injection stroke, simultaneously instructing the linear actuator to move the injection plunger over a desired length of the injection stroke, then simultaneously moving the injection plunger back in the recharging stroke, Determining an actual length of the injection stroke performed based on the information and determining a desired length for the next injection stroke to compensate for the deviation from the desired value for the previous injection stroke.

By measuring the last injection stroke and compensating for the deviation, the accuracy of the next injection stroke can be increased and consumption of the previous cylinder lubricant can be reduced.

In the above method, the common drive may be driven by an elastic member in a recharging stroke.

The cylinder lubrication apparatus may be suitable for all functions according to all the embodiments of the engine described above. In addition, the cylinder lubrication apparatus can perform all the embodiments of the above-described method.

Further objects, features, advantages and characteristics of the cylinder engine, lubrication apparatus and method according to the present invention will be apparent from the detailed description.

In the following detailed description of the present description, the invention will be described in more detail with reference to the exemplary embodiments shown in the drawings, in which:
1 is a perspective view showing a cylinder lubrication device according to an embodiment of the present invention,
Fig. 2A shows a part of the cylinder lubrication apparatus shown in Fig. 1,
FIG. 2B shows a cross section of the cylinder lubrication apparatus shown in FIG. 1,
Fig. 3 shows another part of the cylinder lubrication apparatus shown in Fig. 1 which is perpendicular to the portion shown in Fig. 2,
4A shows a detail view of a portion of the cylinder lubrication apparatus shown in FIG. 3 with an injection plunger in the intermediate position,
Figure 4b shows a detail view of a portion of the cylinder lubrication apparatus shown in Figure 3 with the injection plunger in the starting position, wherein the broken line represents several random partial strokes,
Figure 4c shows a detail view of a portion of the cylinder lubrication apparatus shown in Figure 3 with an injection plunger in the end position,
5 is a conceptual view showing a portion of a cylinder lubrication apparatus according to an embodiment of the present invention,
6 is a schematic view showing a part of a cylinder of a large two-stroke diesel engine provided with a crosshead,
Figure 7 shows a large two-stroke diesel engine according to an embodiment of the invention,
8 shows another embodiment of the cylinder lubrication apparatus, and Fig.
9 is a graph showing the relationship between stroke length and time for a series of lubricating fluid injections.

In the following detailed description, an exemplary embodiment of an engine, a cylinder lubrication apparatus and a method of controlling lubrication fluid injection into an engine cylinder according to the present invention will be described.

The present invention relates to an engine cylinder lubrication apparatus (1) for a large two-stroke diesel engine (100) of a crosshead type capable of constituting a main propulsion system of a ship or a stationary power generation engine. Referring to Figures 6 and 7, the engine 100 includes a plurality of cylinders 110, generally of three to fourteen cylinders 110 arranged in series, but having a different layout or a different number of cylinders 110 A cylinder 110 (part of one cylinder is shown in Fig. 6) is provided. Each cylinder 110 has a cylinder liner 111 forming an inner surface of the cylinder 110. In the large two-stroke engine 100, the inner diameter (bore) of the cylinder is generally between 250 mm and 1200 mm. The stroke distance of the reciprocating piston 120 slidably arranged in the cylinder liner 111 is generally in a range of 800 to 3000 mm. Thus, the surface that needs to be lubricated can be several square meters. The piston 120 is connected to the crosshead 124 via the piston rod 126. The crosshead 124 is connected to the crankshaft 130 via the connecting rod 128.

The reciprocating piston 120 generally has three to five pressure-retaining piston rings 121 to slide on the inner surface of the cylinder liner 111. In Figure 6, a piston with three piston rings 121 is shown. The purpose of the engine cylinder lubrication system is to provide and maintain a lubricant film on the inner surface of the liner 111 and to reduce friction between the piston ring 121 and the inner surface of the liner 111, To protect the inner surface of the cylinder liner from chemically aggressive material.

A cylinder lubricating fluid such as lubricating oil containing an alkali additive for neutralizing the sulfuric acid formed while the heavy oil is burned in the combustion chamber of the cylinder 110 is supplied to the cylinder liner lubricating fluid injection point or quill 112 formed through the cylinder liner 111, Lt; / RTI > The cylinder liner lubricant fluid injection quill or injection point 112 may be a simple outlet (hole) or may be formed into a nozzle or injector or other manner known in the art. In one embodiment, the quill 112 has a check valve to prevent exhaust gas from entering the cylinder lubricant. In general, the number of cylinder liner lubrication injection quills 112 formed in the cylinder liner 111 is four, such as four to twelve or four to twenty, and the cylinder liner lubrication injection quill 112 is formed around the liner 111 And are arranged at the same height to ensure a uniform application of lubricating fluid.

If a particular area of the cylinder 110 is susceptible to wear, the distribution of the cylinder liner lubrication fluid injection quill 112 corresponding to this area may increase or decrease, respectively. After injection, the injected lubricating fluid is distributed on the liner 111 by a piston ring.

The construction and operation of large two-stroke diesel engines with crossheads are thus well known and thus do not require further explanation in this context.

1 shows a preferred embodiment of the cylinder lubrication device 1. The cylinder lubrication apparatus 1 includes a housing 10 and an operating device 40 coupled to the housing 10.

Figs. 2A, 2B, 3 and 4A to 4D show the details of the cylinder lubrication apparatus 1 of Fig. 1 in a cross-sectional view. A plurality of identically operating piston pumps are disposed within the housing 10. Each piston pump includes an injection cylinder 29 formed in the housing 10. In the portion shown in Fig. 2, the injection cylinder 29 can not be seen. In the portion shown in Figs. 3 and 4, one injection cylinder 29 can be seen. The injection chamber 20 is formed in front of the injection plunger 30.

The piston pump is preferably arranged in a circle (seen in a portion at right angles to the long axis of the injection cylinder 29), but this is merely an exemplary arrangement, other arrangements along a straight line or a curve or a rectangular arrangement may also be used.

In the embodiment shown in Figures 1, 2A, 2B, 3 and 4A-4C there are ten piston pumps, in which ten injection openings 21 formed at the top of the housing 10 Is shown. In the preferred embodiment, there are ten piston pumps, but may be any other number of, for example, two to twelve or more.

5, which shows a conceptual view of the cylinder lubrication apparatus 1, two piston pumps each having an injection cylinder 29 can be seen. An injection plunger 30 is slidably received in each injection cylinder. The injection plunger 30 is configured to discharge a predetermined volume of lubricating fluid in the injection chamber 20 to the engine cylinder 110 during an injection event and to refill the injection chamber 20 with a predetermined volume of lubricating fluid. Thus, the injection plunger 30 is arranged to form a seal (at least at the plunger head 30 ') with the inner wall of the injection cylinder 29 and is slidably movable within the injection cylinder 29.

All of the injection plungers 30 are connected at one end to a plunger connector 31 which includes a flange with a recess into which the ends of the thrust plate and the injection plunger 30 are received So that the plunger connector 31 forms part of a common drive which can push the injection plunger 30 during the injection stroke and pull the injection plunger during the suction stroke. The plunger connector 31 is disposed in the connector chamber 32 formed in the housing 10 with the extension of the injection chamber 20. Sliding of the plunger connector 31 will thus allow all plungers 30 to slide simultaneously in their respective injection cylinders 20.

The plunger connector 31 is also connected to a first piston 41 slidably disposed in a cylinder which together form a first pressure chamber 35 to form a first linear actuator. The first pressure chamber 35 is in fluid communication with the valve means, which may be a hydraulic on / off valve 40, through the first operating conduit 60 (see FIG. 2). The first actuating conduit 60 has an opening 60 'leading to the first pressure chamber 35 (see FIG. 5).

The movement of the first piston 41 relative to the housing 10 thus results in the movement of the plunger connector 31 in the connector chamber 32 which in turn causes the simultaneous movement of the plunger 30 in each injection cylinder 29 Will cause movement.

The plunger connector 31 may be a plate-shaped element, but may have other configurations, such as an arm (not shown) extending from the first piston 41.

The injection chamber 20 is in fluid communication with the injection port 21 formed in the outer wall of the housing 10 through the injection path from the injection chamber 20 to the injection port 21.

In the embodiment shown in FIG. 5, each of these injection passages has a first conduit 11 forming an outlet or an outlet from the injection chamber 20. The first conduit 11 may be formed at the end wall of the injection chamber 20 as shown or may be formed at the side wall of the injection chamber 20 at the end of the opposite connector chamber 32. A first conduit (11) connects the injection chamber (20) and each intermediate conduit (12).

In the illustrated embodiment, the intermediate conduit 12 is oriented transversely within the housing 10 relative to the longitudinal axis of the injection chamber 20. The intermediate conduit 12 (and the first conduit) provides a dual purpose of directing the lubricant to the injection chamber 20 as described below.

The second conduit 13 connects each intermediate conduit 12 and each injection conduit 14, which forms a connection to each injection outlet 21.

To prevent backflow of material in the cylinder of the engine, a one-way valve 22 is disposed in the injection conduit 14, in the second conduit 13, or between them. Thus, the one-way valve 22 only permits flow towards the inlet outlet 21.

The one-way valve 22 is formed in the chamber 22 ′ formed between the second conduit 13 and the inlet conduit 14 or in the second conduit 13 or the inlet conduit 14.

2, each injection path includes a first conduit 11, a middle conduit 12, a second conduit 13, and an injection conduit 14. In the embodiment shown in FIG.

In FIG. 2, the housing 10 is shown as being formed of one entity or component, but may be formed of several component parts. The chambers, passages and conduits 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 can be formed as passages or bores formed in the housing. However, they can also be formed by suitable tubes, pipes, cylinders, etc. and assemblies thereof.

The injection port 21 is connected by a suitable pipe (not shown) to the cylinder liner lubricating fluid injection point / quill 112 formed in the cylinder liner 111.

The injection chamber 20 is supplied with lubricating fluid through a lubricating fluid supply passage. In the embodiment shown in Fig. 5, these lubrication fluid feed passages start with an inlet 15 which is common to all the injection chambers 20 and which is formed in the housing 10. Inlet 15 leads to inlet conduit 16. Through the third conduit 17, the inlet conduit 16 is in fluid communication with the inlet conduit ring 18.

The inlet conduit ring 18 is formed in the housing 10 in a plane perpendicular to the longitudinal axis of the injection chamber 20 and is a ring-shaped conduit.

In other embodiments (not shown), there may be two to four inlets 15 and corresponding inlet conduits 16 leading to inlet conduit rings 18.

The fourth conduit 19 connects the inlet conduit ring 18 to each said intermediate conduit 12 and again to the respective injection chamber 20 through the first conduit 11.

Way valve 23 is disposed in the supply passage between the fourth conduit 19 and the intermediate conduit 12 to prevent the lubricating fluid from flowing back to the inlet conduit ring 18 from the intermediate conduit 12. [ The one-way valve 23 may be formed in the fourth conduit 19 or in a chamber 23 ′ formed between the fourth conduit 19 and the inlet conduit ring 18.

Thus, in the illustrated embodiment each feed passage is a first conduit 11, an intermediate conduit 12, a fourth conduit 19 and a common inlet conduit ring 18, a common third conduit 17, an inlet conduit. 16 and common inlet 15. Common here means common to all supply conduits.

As also mentioned above, the intermediate conduit 12 and the first conduit 11 provide a dual purpose of guiding lubricant to the injection chamber 20, thus forming a part of each of the feed passages as well as the respective injection passages do. This will be further explained below.

The inlet 15 of the lubricating fluid supply passage is connected with a pressurized source of lubricating fluid, such as a lubricating oil tank. This is preferably done to provide an even supply of lubricating fluid to each injection chamber 20 and to provide a safety margin for clogging of each of the injection chambers 20 and its feed passages, And is pressurized by a positive displacement system.

The one-way valve 22 formed in the injection passage and the one-way valve 23 formed in the supply passage may be a ball valve type. Alternatively, electronic or hydraulically controlled shut-off valves or on / off may be used instead of one-way valves.

The housing 10 supports the hydraulic on / off valve 40. The hydraulic on / off valve 40 is configured to act on the ash 1 piston 41 by filling the first pressure chamber 35 with hydraulic fluid. Fig. 2A shows that the hydraulic control valve 40 is connected to the source of the hydraulic pressure P and the tank T. Fig.

The plunger connector 31 is also connected to a second piston 46 slidably disposed in the second cylinder 36 to form a second pressure chamber 37 to form a second hydraulic linear actuator. The second pressure chamber 37 is in fluid communication with the hydraulic on / off valve 40 through the second operating conduit 61 (see FIG. 2). The second actuating conduit 61 has an opening 61 'leading to the second pressure chamber 37 (see FIG. 5).

Movement of the first and second pistons 41 and 46 relative to the housing 10 causes movement of the plunger connector 31 in the connector chamber 32 and this again causes the plunger 30 ). ≪ / RTI > The first and second pressure chambers 35, 36 are disposed opposite the connector chamber 32. Likewise, the first and second pistons 41, 46 are disposed opposite the plunger connector 31. Each of the first and second pistons (41, 46) seals the inner wall of the first and second pressure chambers (35, 36).

The plunger connector 31 and the plunger 30 can be moved in the opposite direction with respect to the housing 10 by alternately pressing the first and second pressure chambers 35 and 36. [ This function of the cylinder lubrication apparatus 1 will be described in more detail below. When the first pressure chamber is pressed with the second pressure chamber connected to the tank T, when the injection plunger is moved in the injection direction and the second pressure chamber is pressed while the first pressure chamber is connected to the tank, The injection plunger is moved in the recovery / recharge direction.

In one final position, the plungers 30 of the injection chamber 20 are at their most extended position E, that is, they are located in a position where the plunger head 30 'of the plunger 30 is in contact with the first conduit 11, That is, adjacent to the inlet / outlet of the injection chamber 20.

The hydraulic valve 40 pressurizes the second pressure chamber 36 and connects the first pressure chamber 35 to the second pressure chamber 36 to charge the injection chamber 20 with the lubricating fluid, Thereby moving the plunger 30 (through the plunger connector 31) in a direction away from the first conduit 11, i.e., downwardly in Fig. 5, during the return / suction / refill stroke. This will provide a reduction in pressure in the injection chamber 20.

The one way valve 22 in the injection path will prevent the lubricating fluid (or other material) from entering the middle conduit 12 at the injection conduit 14 and the injection port.

The lubricating fluid from the pressurized lubricating fluid source begins to flow at the inlet 15 through the inlet conduit 16 and the third conduit 17 to reduce the pressure drop in the inlet conduit ring 20 18). From the inlet conduit ring 18 the lubricating fluid flows through the one way valve 23 and the fourth conduit 19 in the feed passage and through the intermediate conduit 12 and the first conduit 11 to the injection chamber 20 It will flow.

Thus, the inlet conduit ring 18 serves to distribute the lubricating fluid from the inlet 15 to all the injection chambers 20.

Preferably, when the plunger connector 31 is at the most retracted position (adjacent to the rear end wall 33 of the connector chamber 32), the plunger head 30 'continues to be positioned within the injection chamber 20, The length of the connector chamber 32 corresponds to the length of the injection chamber 20 so as to form a seal with the inner wall of the injection chamber 20.

When the injection plunger 30 is retracted to their starting position S and the injection chamber 20 reaches the maximum capacity, the injection event of the lubricating fluid is initiated when the first pressure chamber 35 is under the pressure P The first piston 41 is activated by a hydraulic valve that connects the second pressure chamber 36 to the source and the second pressure chamber 36 to the tank to cause the injection plunger 30 to move toward the first conduit 11, ) ≪ / RTI > This will drain the lubrication fluid located in the injection chamber 20. Thus, lubricating fluid will flow through the first conduit 11 and the intermediate conduit 12.

Since the one-way valve 23 in the feed passage prevents flow towards the inlet conduit ring 18 and the inlet 15, the lubricating fluid only passes the second conduit 13 by the one-way valve 22 in the injection passage. And flow through the inlet conduit 14 and exit through the inlet outlet 21. From here, the lubricating fluid is directed through the appropriate pipe to the cylinder liner lubricant fluid injection point / quill 112. Then, another cycle of filling the injection chamber 20 can be started.

The hydraulic valve 40 may be connected to the electronic control unit 50. This electronic control device 50 may be included in the housing 10 or the actuating device 40 in the cylinder lubricating device 1 in one embodiment. The electronic control unit 50 is capable of providing information on the position of the engine piston 120 and possibly other engine operating conditions through a series of sensors or signals indicative of, for example, the position of the crankshaft 13 To some other control / sensor system of the engine 100. Some of the above sensors may be located in the engine cylinder 110, or may register the position of the crankshaft of the engine 100.

In another embodiment, the electronic control device 50 is an engine control system (ECS). Since the engine control systems are already configured to receive information on the position of the engine piston 120 and other engine operating conditions, it is possible, for example, to determine the top dead center (TDC) of the engine piston, the position of the crankshaft, (Based on signals from the sensors in the cylinder), the temperature of the cylinder liner 111, the lubrication in the cylinder, the engine speed, the actual fuel consumption, or the sulfur content of the heavy oil in the fuel inlet valve or the sulfuric acid concentration in the cylinder, May be configured to control a corresponding cylinder lubrication system based on operating conditions of other engines or individual cylinders, such as formation of fluids, formation of alkaline deposits, lubricant BM, engine loads, and the like.

The basic rule is that the dosage of the cylinder oil should be proportional to the sulfur ratio in the fuel and the dosage of the cylinder oil should be proportional to the engine load. Since the engine load is essentially proportional to the amount of fuel entering the cylinder. The amount of fuel injected is also controlled by the electronic control device 50, and this information can then be used to determine the required cylinder oil dosage. Where the engine electronic control device and the cylinder lubricating electronic control device are separate devices, information on the engine load, the amount of fuel injected, or even the necessary cylinder oil dose may be transmitted from the engine electronic control device to the cylinder lubricating electronic control device.

The amount of cylinder lubricating oil required per revolution depends on the engine load and the sulfur content of the fuel as described above, but is very accurately known for specific engines, specific loads and specific fuel container contents. This data can be found by calculation and by experiment. Thus, the maximum dose per revolution at maximum load and highest fuel tank content is well known and can be used to determine the overall stroke length and diameter of the injection plunger 30 of the piston pump, There may be some partial strokes Ps before the entire stroke of the plunger 30 is reached. For example, at maximum engine load and highest fuel tank content (100 cc), when cylinder lubricant is used per stroke, the displacement volume of the piston pump must be at least 2 to 3 times, i. E. At least 250 cc, That is, it needs to be at least 500 cc larger. Preferably, the diameter of the injection plunger 30 is selected so that the overall stroke resulting therefrom is suitable for precise actuation with a linear actuator.

The electronic control device 50 can thus be configured to be connected to and control the cylinder lubrication device 1 of some or all of the cylinders 110 of the engine 100.

The actuating device 40 or the housing 10 of the cylinder lubrication apparatus 1 may be provided with the plunger 30 itself, the plunger head 30 ', the first or second piston 41, 46 or the plunger 30, Connected to the electronic control device 50 described above so as to provide the electronic control device with a signal 51 containing information on the position of the plunger 30 in the injection chamber 20 by measuring the position of the connector 31 And further includes a position sensor 44. This information can be used to improve the precision of the injection and the electronic control device 50 is connected and configured to provide the control signal 52 to the hydraulic valve 40.

In a preferred embodiment, the first piston 41 has an extension 42, which is in the form of a rod and has a diameter or cross-sectional area smaller than the diameter or cross-sectional area of the first piston 41. The extension 42 extends to a position measuring device 70 that includes a position sensor 44. The position of the plunger 30 in the injection chamber 20 is measured by the position of the extension 42 in the position measuring device 70. [

Preferably, one cylinder lubrication apparatus 1 is operated for one cylinder of the engine, the number of injection chambers 20 is matched to the number of cylinder liner lubricant fluid injection points / quills 112, It depends. Alternatively, one or more cylinder lubrication devices 1 can be operated for one cylinder.

The electronic control device 50 is configured to provide at least one lubricating fluid injection per engine cycle. When the engine piston 120 passes through the cylinder liner lubrication point / quill 112 in at least one direction, injection may preferably be provided between the two piston rings 121.

In one embodiment, when the engine piston 120 passes through the cylinder liner lubrication point / quill 112 in at least one direction, the electronic control device 50 has at least one piston ring 121 between the two pairs of piston rings 121 Of lubricating fluid. In one embodiment, when the engine piston 120 passes through the cylinder liner lubrication point 112 in at least one direction, the electronic control device 50 will each have at least one lubrication between the pair of piston rings 121 Fluid injection. In another embodiment, which can be applied to the embodiment just described, the electronic control device 50 is configured to provide at least one injection of lubricating fluid for each passage of the engine piston (up / down). This can be applied in the embodiment in which the cylinder liner lubrication point / quill 112 is disposed in the cylinder liner 111 at a position where the engine piston passes twice through the cylinder liner lubrication point / quill 112 upon rotation of the combustion cycle.

In an alternative embodiment, the cylinder liner lubrication point / quill 112 is disposed within the cylinder liner 111 such that when the piston 120 is at top dead center, the cylinder liner lubrication point 112 is at the lowermost and the piston ring < (The lowermost pair of the piston rings).

A preferred lubrication apparatus 1 has been described above. However, other types of lubrication apparatus can be used in connection with the present invention. In general, the lubrication apparatus must have at least one injection chamber 20 with a plunger. The injection chamber should have a known capacity or at least a known diameter (or cross-sectional area). Means must be provided for determining the position of the plunger within the injection chamber.

The lubricating device 1 for lubricating the engine cylinder preferably comprises a plunger connector 31 or thrust for actuating several injection pumps, such as a double acting hydraulic piston or a plunger 30 provided in the injection chamber 20, And a first and a second piston for driving the plate. The lubricating oil injection pump is arranged to supply the cylinder oil / lubricating fluid to each of the lubricating quills 112 mounted in the cylinder liner 111 of the engine cylinder 110.

Each infusion pump consists of a plunger 30, a barrel / infusion chamber 20, a suction or inhalation port, and a second non-return valve at the delivery port of the pump.

The cylinder lubrication apparatus 1 shown in Figs. 1, 2A, 2B, 3, 4A, 4B and 4C includes a cylinder lubrication apparatus 1 of a channel for filling and emptying 5 is different from that shown in Fig. The apparatus of Figures 1 to 4 also has a common inlet port (not shown).

The hydraulic actuator pistons (first and second pistons 41 and 46) are actuated by the compressed oil through the control valve 40 to provide an actuation piston and plunger connector 31 (also referred to as thrust plate) To move in any one direction and to stop or stop at an arbitrary position with respect to the entire stroke of the plunger 30.

Preferably, the pressure for operating the first and second pistons 41, 46 corresponds to the pressure of the general hydraulic system of the engine. The sizes of the actuator pistons (first and second pistons 41, 46) are adjusted accordingly.

The position of the actuator pistons (first and second pistons 41, 46) and / or plunger 30 is measured by position sensor 44.

The lubrication apparatus 1 is preferably controlled by an on / off valve 40 and the on / off valve 40 is controlled by an electronic control unit 50 (electronic control system / control system).

The control system 50 operates the control valve 40 in the time domain (several milliseconds (mS)). The relationship between the operating time and the stroke length is monotonous, that is, the long operating time provides a long stroke, but the relationship is not linear. This means that bisecting the lubrication pulse in milliseconds means providing a lower lubricant dose compared to one pulse having two half lengths.

When the lubrication apparatus 1 is scaled, the lubrication apparatus 1 is controlled to a set value having a rate shaping profile according to the following description.

The lubrication apparatus 1 and the system always use the whole or almost the entire stroke of the injection plunger 30 to accurately measure the amount of injected cylinder oil by calculating the total number of strokes over time. However, the entire stroke is divided into several small partial strokes Ps, that is, part of the total stroke for each cylinder oil supply event. By utilizing this principle, the overall efficiency of the cylinder lubricator is increased and wear is well dispersed. The electronic control unit 50 calculates the total number of strokes performed to add up the amount of oil injected over time. The injection plungers return to their starting positions (fully retracted position S) only after a full or almost total stroke has been performed, i.e., if necessary. In an embodiment in which movement of the injection plunger is controlled in a precise closed loop control, the entire stroke of the injection piston can be utilized even when the remaining stroke available up to the end position E is shorter than the required length of the next partial stroke. This accurate control can compensate for the shortage of the partial stroke from the next stroke to the end position E. [ In one embodiment that uses a less accurate control, i. E., A control system based on time pulse operation and on / off type hydraulic valves, if the length of the last part of the total stroke is less than the desired length on the next part stroke, The last part of administration can not be used. In this case, the controller will command the injection plunger to return to the start position S and start the next partial stroke from the start position.

The entire stroke is detected by the position sensor 44 or a separate full stroke sensor 45. [

By using the full (or almost total) stroke of the pump cylinder at all times, the wear becomes uniform over the entire working surface of the injection chamber 20, which increases the life of the pump.

The lubrication fluid / cylinder oil corresponds to an associated piston 120 at any given crank angle according to an angle sensor mounted on the engine, i.e. at a predetermined crank angle, but preferably in front of the injection point / quill 112 So that the cylinder lubricating oil is injected between the piston rings 121. As a result,

The injection volume for each injection can be adjusted and the injection time (mS) can be adjusted for each individual injection.

The fully filled injection chamber 20 is preferably sized such that the diameter of the injection cylinder 29 (and also the diameter of the injection plunger 30, ) And the length of the entire stroke are selected. The exact number of partial injection strokes is determined by engine load and cylinder conditions. The new cylinder liner requires substantially more lubricant for a limited drive period than the following normal operating conditions and therefore the capacity of the injection chamber corresponding to the total stroke length is determined by the lubrication requirement during the commissioning of the cylinder liner, Therefore, even during the trial operation of the cylinder liner, the entire stroke can include more than the necessary partial stroke Ps.

The injection plunger 30 is not relocated to their final retracted position until the next dose reaches or exceeds the maximum, as well as the maximum stroke length of the plunger 30 (i.e., the injection chamber 20 is charged / . Thus, energy is also conserved.

In general, the cylinder lubrication apparatus 1 according to the above-described embodiments operates by the following operation principle. The cylinder lubrication apparatus 1 includes a plunger connector 31 (thrust plate) for operating a plurality of piston pumps including the above-mentioned injection cylinders 29 and 20 provided with an injection plunger 30, And provides a cylinder oil to each lubrication quill 112 mounted in the cylinder liner 111, including pistons or pistons 41, The double acting hydraulic linear actuator, the plunger connector 31 and the injection plunger 30 are mechanically coupled by interlocking.

Each piston pump comprises an injection plunger 30, an injection cylinder 29, a suction valve or suction port, and a check valve at the delivery port of the pump.

The hydraulic actuator piston and pistons 41 and 46 are actuated by the compressed oil through one or more control valves to move the actuator pistons 41 and 46 / plunger connector 31 / injection plunger 30 in either direction So as to be positioned or stopped at an arbitrary position in the entire stroke.

The oil pressure of the actuator can be fixed or varied according to engine design specifications and engine operating conditions.

The position of the actuator pistons 41, 46 or the plunger 30 is measured by the position sensor 44. In the embodiment shown in FIGS. 1-4, the sensor 44 is disposed in the extension 42 of the actuator piston 41.

The cylinder lubrication apparatus 1 is controlled by an adaptive circulation feedback system. This system operates the control valve in the time domain (several milliseconds (mS)). Actuation of the actuator pistons 41, 46 causes the plunger 30 to perform the stroke. A measurement of the actually performed stroke is performed when the actuator pistons 41 and 46 stop moving after the stroke.

Based on the measured stroke length, the control device calculates the next operating time pulse length taking into account the measurement of the length of the previous partial stroke or strokes. The control device considers the length of the next partial stroke to determine if it is necessary to return to the starting position.

The cylinder lubrication apparatus 1 always uses the entire plunger 41, 46 / injection plunger 30 (hereinafter referred to as " plunger 41 ") to precisely measure the amount of cylinder oil injected by calculating the length of the part and the entire stroke with the passage of time We use administration. However, in order to reduce the amount of oil per operation, the entire stroke is divided into several small portions. All injections of the partial stroke as well as the entire stroke are timed according to the crank angle of the engine. The electronic control unit 50 calculates the number and length of the partial strokes to provide an accurately measured amount of lubricant over time.

The actuator pistons 41, 46 return to their starting positions after the entire stroke has been performed.

The entire stroke of the plunger 30 in the injection cylinder 29 is detected by the position sensor 44 or a separate overall stroke sensor 45. [

By using as much as possible the entire stroke of the pump cylinder (the plunger 30 in the barrel 20), the wear of the piston pump is uniform over the entire working surface of the barrel 20 of the piston pump. Therefore, the life of the pump is increased.

Cylinder lubricant can be injected at any desired crank angle and each oil injection timing can be continuously adjusted according to engine design specifications and engine operating conditions.

The cylinder lubrication apparatus 1 preferably follows the following operating cycle:

At start-up, the system performs measurements to determine the maximum and minimum values from the position sensor in accordance with the mechanical end stops of the plunger relative to the longitudinally adjustable barrel.

Then, the control device 50 moves the actuator pistons 41, 46 to the starting position.

The electronic control unit 50 determines the desired dose of the cylinder lubricant to be injected at the next injection event, i. E., The length of the desired next partial stroke of the injection plunger 30.

The electronic control unit 50 calculates the estimated time that the control valve 40 needs to be opened to move the injection plunger 30 by a desired length of the injection cylinder 29 corresponding to the desired capacity of the cylinder lubricating oil Time pulse or valve operating time). The electronic control valve 50 then actuates the control valve 40 at a predetermined crank angle and the actuator pistons 41 and 46 move the partial stroke forward toward the frontmost mechanical stop. The electronic control valve 50 compensates for the shortage of the length of the partial stroke in the next partial stroke.

After the movement of the actuator piston is stopped, the position sensor 44 measures the actual position of the actuator piston 41 (or the plunger 30).

A new time pulse is calculated based on the previous measurement, i.e. the shortage or excess of the last partial stroke due to the pressure change, and the viscosity of either or both of the cylinder lubricant and the hydraulic oil is calculated by the electronic control unit 50 in the next stroke Is compensated.

The new time pulse actuates the control valve 40 at a predetermined crank angle and the actuator pistons 41 and 46 are moved again from the current position to the length of the partial stroke and followed by another position measurement.

The electronic control device 50 grasps the remaining available stroke length of the plunger 30 in the injection cylinder 29 and if the remaining stroke length available up to the end position E is less than or equal to the desired length of the next partial stroke, And instructs the pistons 41 and 46 to return to the start position.

If the last stroke is calculated to be greater than the remaining possible strokes before contacting the mechanical termination stop, the injection chamber 20 is emptied of the mechanical stop and the amount of oil required to complete the lubrication is added to the next partial stroke / do.

In another embodiment, if the next partial stroke is calculated to be greater than the remaining possible strokes, the injection chamber 20 is emptied for mechanical stop, the injection plunger returns to the start position, and the amount of oil required to complete the lubrication Is added to the next partial administration.

The injection plunger 30 is not relocated to their final retracted position until the maximum stroke length of the plunger 30 is reached (i.e., the injection chamber 20 is not charged / refilled). Thus, energy is also conserved.

Two hydraulic actuators or double acting hydraulic linear actuators are actuated by the oil compressed through the control valve to move the linear actuator / thrust plate / injection plunger in either direction and position or stop at any position in the entire stroke.

Figure 8 shows another embodiment of a cylinder lubrication apparatus and method according to the present invention which is essentially the same as the one described above except that the hydraulic valve is a proportional 4/3 way valve 140 and the operation is otherwise as described below. Respectively.

The lubricating fluid / cylinder oil can be injected according to actual needs. Operation due to the hydraulic proportional valve 140 includes the following:

- speed control of the lubrication fluid / cylinder oil injection into the engine, or intermittently, into one or more parts of the engine.

The injection volume for each injection can be adjusted and the injection time (mS) can be adjusted for each individual injection.

In this embodiment, the signal of the position sensor is used in the feedback control loop, and the position of the hydraulic proportional valve 140 is adjusted accordingly by the electronic control device so that the speed and position of the hydraulic linear actuator are continuously And precisely controlled. Therefore, the charging rate of the cylinder lubricating oil and the dosage of the cylinder lubricating oil can be accurately and immediately controlled.

This will be described in more detail with reference to FIG. For all reciprocations of the piston 120 of the cylinder 110, a series of injections can be performed. Thus, the desired capacity (S _D ) to be injected per revolution is:

S _D = S ₁ + S ₂ + ... + S _n

The duration of each injection (t1, t2, t3, ..., tn) and the duration of each injection in rotation are variable.

Thus, in Fig. 7, the pitch (v = ds / dt) of the graph for the injection profile, which corresponds to the injection velocity, v, is variable.

The desired capacity (S _D = S ₁ + S ₂ + ... + S _n ), for example, two injections (S1 + S2), is performed during the passage of the piston. Thus, an embodiment using a hydraulic proportional valve causes a single lubrication event to be divided into multiple partial events, so that more than one lubricant injection can be performed during one pass of the piston.

According to another embodiment (not shown), the actuator for driving the common drive is a double-acting linear actuator operated by an electric drive motor. This embodiment can use a linear double acting electric drive motor or a reversible rotary electric drive motor coupled to an apparatus for converting the rotation of the reversible rotary electric drive motor into linear motion.

For all of the embodiments described above, the actuator may be used during the return stroke so that the injection plungers can return to their starting position S relatively quickly, i.e., faster than when using elastic means such as helical springs.

According to another embodiment (not shown), the operation of a cylinder lubrication apparatus for a large low-speed two-stroke diesel multi-cylinder engine, in which the injection plungers return to their starting positions and charge their pump chambers after each variable- A method is disclosed. In the present embodiment, the cylinder lubrication apparatus is designed so that the stroke length of the injection plunger and the diameter of the injection plunger are sufficiently large for a number of partial strokes, that is, the maximum displacement of the injection pump is approximately equal to the maximum single dose required in the associated engine Is substantially the same as the cylinder lubrication apparatus described above. The cylinder lubrication apparatus includes a plurality of piston pumps, each piston pump including an injection plunger slidably movable in the injection cylinder, a common drive including a linear actuator for simultaneously driving all the injection plungers, And a position sensor (44) arranged to detect the position of the plunger (30). The method includes the steps of determining a desired length of the injection stroke, simultaneously instructing the linear actuator to move the injection plunger (30) over a desired length of the injection stroke, and then simultaneously moving the injection plunger back in the refill stroke, Determining an actual length of the injection stroke performed based on the information from the sensor and determining the desired length for the next injection stroke to compensate for the deviation from the desired value for the previous injection stroke. Here, the common drive can be driven by the elastic member in the recharging stroke.

Although the first hydraulic linear actuator is described as one cylinder / piston device in the above embodiment, it should be understood that the first hydraulic linear actuator may instead include a plurality of cooperating cylinder-piston devices. This also applies to the second hydraulic linear actuator, which may include several cylinder / piston devices.

In all of the above embodiments, the capacity of the assembled lubrication apparatus 1 should be equal to or greater than that of the engine 100.

Thus, the present invention provides a wide variety of possible designs and modifications of the lubrication system.

The teaching of the present invention has many advantages. Other embodiments or implementations may benefit from one or more of the following. It is to be noted that this is not an exhaustive list and that there may be other advantages not disclosed herein. One advantage of the teachings of this application is that it provides greater flexibility in designing and operating the lubrication system.

Although the teachings of the present application have been described in detail for purposes of illustration, it is to be understood that such details are for that purpose only and that changes may be made by those skilled in the art without departing from the scope of the teachings of the present application.

The term "comprising " as used in the claims does not exclude other elements or steps. The term "one" as used in the claims does not exclude a plurality. A single processor or other apparatus will perform the functions of several means recited in the claims.

Claims (27)

A large-low-speed two-stroke diesel multi-cylinder engine cylinder lubrication apparatus (1) for a large low-speed two-stroke diesel multi-cylinder engine is characterized in that each of the cylinders (110) The cylinder lubrication apparatus 1 is provided with a reciprocating piston 120 having a piston ring 121 so that the cylinder lubrication apparatus 1 is capable of reciprocating the piston 120 through a plurality of injection points 112 distributed around the circumference of the cylinder 110. [ To provide a precise dose of cylinder lubricating fluid to the inner surface of the cylinder liner (111) for reciprocating motion,
The cylinder lubrication device 1,
A plurality of piston pumps each having an injection plunger 30 slidably movable in the injection cylinder 20 between a start position S and an end position E,
A common drive 31 comprising linear actuators 41 and 46 for simultaneously driving all injection plungers 30,
The injection plunger (30) having a predetermined total stroke between the start position (S) and the end position (E)
The diameter of the injection cylinder and the length of the total stroke are partial strokes over a number of times in a direction from the start position to the end position before the injection plunger 30 returns to the start position. A cylinder lubrication device (1), characterized in that the precise dosage is delivered by moving the injection plunger (30) over a portion of the maximum stroke so that it can be moved within. The method of claim 1,
The common drive includes a double-acting hydraulic or electric actuator including a first hydraulic or electric actuator for moving the injection plunger in a direction from a start position to an end position, and a double-acting hydraulic or electric actuator for moving the injection plunger And a second hydraulic or electric actuator. 3. The method according to claim 1 or 2,
The common drive includes:
A plunger connector (31) connected to the plunger (30) and arranged to simultaneously move the plunger (30) within the injection cylinder
And includes a double-acting linear actuator (41, 51, 36, 46)
The double-acting linear actuators (41, 51, 36, 46)
A first hydraulic linear actuator (41, 51) for moving the injection plunger in the direction from the start position to the end position, and
And a second hydraulic linear actuator (36, 46) for moving the injection plunger in the direction from the end position toward the start position. The method according to any one of claims 1 to 3,
An electronic control device (50) configured to actuate a first actuator (41, 51) to move an injection plunger over a variable length partial stroke for each time that a precise dosage of cylinder lubricant is delivered to the cylinder And wherein the electronic control device (50) further comprises a second hydraulic pressure pump for returning the injection plunger (31) to their starting position (S) when the injection plunger (31) Is configured to actuate the linear actuators (36, 46). 5. The method of claim 4,
Further comprising a position sensor (44) arranged to detect the position of the injection plunger (30) in the injection cylinder (20) and in communication with the electronic control device (50) . The method of claim 5, wherein
The electronic control device 50 determines the dosage of the lubricant currently required or information on the dosage of the lubricant currently required, and the electronic control device 50 determines whether the determined or received So as to move the plunger (30) in a partial stroke over a distance corresponding to a dose of the required lubricating oil. The method according to claim 6,
The electronic control device 50 is configured to control the length of the partial stroke of the injection plunger 30 based on the engine operating conditions, preferably to adjust the stroke length for the engine operating conditions for each injection event. The cylinder lubrication device 1 characterized by the above-mentioned. The method of claim 7, wherein
The electronic control device 50 determines, based on the measured movement of the injection plunger 30, how much the injection plunger 31 has moved in the last partial stroke, and the electronic control device 50 determines the injection plunger. The cylinder lubrication device (1), characterized by compensating for a deviation from the desired value for the last partial stroke when the desired length of the next stroke of (31) is determined. 9. The method according to any one of claims 3 to 8,
Further comprising a hydraulic valve (40, 140) connected to the first hydraulic linear actuator (41, 51) and connected to the second hydraulic linear actuator (36, 46), the hydraulic valve (40) Is configured to selectively connect the linear actuators (41, 51) to a hydraulic source and selectively connect the second hydraulic linear actuator (36, 46) to the hydraulic source. The method of claim 9,
The hydraulic control valve 40 is an on / off valve and the electronic control unit 50 controls the on / off valve 40 so that the on / off valve 40 is connected to the first hydraulic linear actuator 41, And to control the partial stroke of the injection plunger (30) by controlling the length of the injection plunger (30). 11. The method of claim 10,
The electronic control unit 50 controls the on / off valve 40 to move the second hydraulic linear actuator 36, 46 in the direction of the arrow A, when the injection plunger 30 reaches their final position E, Is configured to be connected to the hydraulic source (P) and to return the injection plunger (30) to their starting position (S) by operation of the two hydraulic linear actuators (36, 46) One). The method of claim 10 or 11,
The on / off valve 40 connects the second hydraulic linear actuator 36, 46 to the tank T while the first hydraulic linear actuator 41, 51 is connected to the hydraulic source P And to connect them in the opposite direction. 13. The method according to any one of claims 9 to 12,
Characterized in that the hydraulic valve is a proportional valve (140) and the electronic control device (50) is configured to regulate a speed regulation profile of movement of the injection plunger (30) in a partial stroke. 14. The method according to any one of claims 1 to 13,
Wherein the electronic control unit (50) and the cylinder lubrication apparatus (1) are configured to control the length of the partial stroke and / or the speed of the injection plunger (30) based on specific cylinder operating conditions One). The plurality of cylinders 110,
A piston 120 capable of reciprocating in each cylinder,
Wherein each of the pistons (120) comprises at least two piston rings (121), and
A large low-speed two-stroke diesel engine (100) having a crosshead, characterized in that it comprises the cylinder lubricating device (1) according to any one of the claims 1 to 14. The method of claim 15,
Characterized in that the electronic control device (50) is both an engine control system and a control system for the cylinder lubricating device (1). 2. A method of operating a cylinder lubrication apparatus for a large low-speed two-stroke diesel multi-cylinder engine, the large low-speed two-stroke diesel multi-cylinder engine comprising, in each cylinder, The cylinder lubrication apparatus 1 is provided with a reciprocating piston 120 having a piston ring 121 slidable in the cylinder 110. The cylinder lubrication apparatus 1 thus has a plurality of injection points distributed at the same height around the circumference of the cylinder 110, Providing a precise dose of cylinder lubricant per revolution or a predetermined revolution to said inner surface of the cylinder liner,
The cylinder lubrication device 1,
A plurality of piston pumps each having an injection plunger (30) slidably movable in the injection cylinder (20) between a start position (S) and an end position (E) The movement of the injection plunger 30 between the start position S and the end position E and the movement of the injection plunger 30 simultaneously in both directions between the start position S and the end position E And a common drive (31) including linear actuators (41, 46)
The method comprises:
(30) by the linear actuator (36, 41, 46, 51) in a plurality of partial strokes from the start position (S) to the end position (E) to form a plurality of cylinder oil injection events. And moving the linear actuators (36,41, 46) in one full stroke from the end position (E) to the start position (S) when the injection plunger reaches their end position (E) , 51) simultaneously with the injection plunger (30). The method of claim 17,
Determining or receiving a dosage of lubricant currently required and instructing said linear actuator to move said injection plunger (30) in a partial stroke over a distance corresponding to the dose of said determined or received required lubricant ≪ / RTI > The method of claim 18,
Measuring the movement of the injection plunger 30 in the last partial stroke and instructing the linear actuators 36, 41, 46, 51 to move to the next partial stroke, in particular the end of the stroke of the injection plunger 30. If the last partial stroke is short by reaching, then compensating for a deviation from the desired value for the last partial stroke. 20. The method according to any one of claims 17 to 19,
Further comprising adjusting the length of the partial stroke of the injection plunger (30) in response to engine operating conditions. 21. The method of claim 20,
Further comprising adjusting the length of the partial stroke of the injection plunger (30) for each injection event. 22. The method according to any one of claims 17 to 21,
The cylinder lubrication apparatus 1 includes a hydraulic valve 40 connected to the first hydraulic linear actuators 41 and 51 and connected to the second hydraulic linear actuators 36 and 46, Selectively coupling the hydraulic linear actuators (41, 51) to a hydraulic source and selectively coupling the second hydraulic linear actuator (36, 46) to the hydraulic source. 23. The method of claim 22,
Pushing the first hydraulic linear actuator (41, 51) to move the injection plunger (30) over a portion of the entire stroke length, and applying pressure to the plunger only when the injection plunger reaches their end position (E) Further comprising the step of pressing said second hydraulic linear actuator (36, 46) to return said second hydraulic linear actuator (30, 30). 23. The method of claim 21 or 22,
Wherein the hydraulic valve 40 is an on / off valve and the method controls the length of a period during which the on / off valve 40 connects the first hydraulic linear actuator 41, 51 to the hydraulic source, And controlling a partial stroke of the injection plunger (30). 25. The method of claim 24,
The method includes providing an on / off valve 40 for a predetermined period of time corresponding to a predetermined dose of lubricating fluid so as to allow the plunger 30 to move with a continuous variable length stroke adjusted for each injection event, Off valve (40) by providing a time pulse to the on / off valve (40) to open the hydraulic on / off valve (40). 2. A method of operating a cylinder lubrication apparatus for a large low-speed two-stroke diesel multi-cylinder engine, the large low-speed two-stroke diesel multi-cylinder engine comprising, in each cylinder, The cylinder lubrication apparatus 1 is provided with a reciprocating piston 120 having a piston ring 121 slidable in the cylinder 110. The cylinder lubrication apparatus 1 thus has a plurality of injection points distributed at the same height around the circumference of the cylinder 110, Providing a precise dose of cylinder lubricant per revolution or a predetermined revolution to said inner surface of the cylinder liner,
The cylinder lubrication device 1,
A plurality of piston pumps each having an injection plunger 30 slidable in the injection cylinder 20 and a linear actuator 36, 41, 46, 51 for simultaneously driving all the injection plungers 30 And a position sensor (44) arranged to detect the position of the common drive or the injection plunger (30), wherein the common drive (31)
The method comprises:
Determining a desired length of the injection stroke, instructing the linear actuator (36, 41, 46, 51) to simultaneously move the injection plunger (30) over the desired length of the injection stroke, Determining the actual length of the injection stroke performed based on the information from the position sensor 44, and determining the desired length for the next injection stroke, Compensating for a deviation from a desired value. The method of claim 26,
Wherein the common drive is driven by an elastic member in the recharging stroke.

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