JP2011190807A - Metering and feeding device of lubricating oil for large diesel engine, and method of metering and feeding lubricating oil for cylinder to large diesel engine cylinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain flexible central control and accurate-timed control of an injection quantity of a lubricating oil with respect to a cylinder of a large diesel engine. <P>SOLUTION: There is disclosed a system of metering and feeding the lubricating oil for a cylinder, for example, to a large cylinder of a ship engine, and a metering and feeding device includes a central pump station (1), a feeding line (31) and return line (33) communicated with a lubricating oil feeding source, an injection device (6), and an opening/closing valve unit (3) and a control unit (25) controlling the same. The injection device and the opening/closing valve unit are connected to the return line. The opening/closing valve unit includes an inlet (P) and an outlet (R). The injection device (6) is positioned in front of a closing member, and has a second chamber connected to a line (7). The control unit is coupled to the opening/closing valve unit (3). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a system for metering cylinder lubricating oil into a diesel motor, such as a large cylinder of a marine engine, having a central lubricating oil supply source that can be configured by a central pump station or a central accumulator, Having a number of injectors corresponding to the number of cylinders in the engine or multiples thereof, the injectors supplying cylinder lubricating oil via one or more nozzle holes to the associated cylinder The injection device is connected to the supply line via the branch line, and has an open / close valve unit provided in the branch line between the injection device and the supply line; It relates to a metering device having a control unit for controlling each open / close valve unit.

  The present invention further relates to a method for metering cylinder lubricant into a large cylinder in a diesel engine, for example a marine engine, wherein the lubricant in a central lubricant supply source which can be configured by a central pump station or a central accumulator is added. A number having one or more nozzle holes each corresponding to the number of cylinders of the engine or multiples thereof Injecting cylinder lubricating oil into the associated cylinder via the injection device, the injection device being connected to the supply line by opening and closing an open / close valve unit provided in the branch line via the branch line. It relates to such a method comprising the steps of controlling each open / close valve unit by means of a control unit.

  Traditionally, it is customary to use a lubrication device that is mechanically coupled to and driven by a crankshaft attached to the engine to be lubricated. These are systems that have limited flexibility in changing the portion of lubricating oil supplied, especially if changes are to be made during engine operation. Many examples of systems for cylinder lubrication are known, such that they achieve flexible and accurate timing and quantity for cylinder lubrication independent of the engine crankshaft. ing.

  An example of a cylinder lubrication system of the type mentioned in the technical field of the present specification and which can be easily installed in a large diesel engine with a plurality of cylinders is disclosed in EP 1 246 571. This system allows electronic control of the amount of oil injected according to the demands that arise during a given operating situation. This disclosed system is very demanding due to the high closing pressure from the pressure source required by the open / close valve provided in the branch line between the injector and the supply line. ) Impose requirements. This is especially true in systems where cylinder lubrication is high, for example by injection of lubricating oil under lubricating oil pressure above 40 bar. In addition, this disclosed system has very high demands to achieve precise control of lubricant delivery per unit time, constant viscosity, constant pressure conditions, constant temperature, constant tube length, etc. Imposed on. This further creates uncertainties about the precise control of timing related to the lubricant injection.

  With the system of the invention, advantages can be achieved when operating at low pressures, for example 25-70 bar, typically 40 bar and above.

European Patent No. 1426571

  The object of the present invention is technically to provide electronically controlled lubrication of the cylinders of a large diesel engine which makes it possible to achieve flexible central control of the injection quantity of oil and precise control of the timing. It is to provide a simple system. In particular, it is an object of the present invention to provide a lubricating oil injection system for lubricating cylinders by lubrication at high lubricating oil pressures, for example 40 bar and above, as well as to lubricating oil viscosity and pressure conditions in the supply line. It is to provide a system that is more stable than the system.

  According to the present invention, this is a system of the type mentioned in the technical section of the present specification, in which the injection device leads to a lubricating oil source via a second branch line for circulating the lubricating oil. Connected to the return line, the open / close valve unit is connected to the return line and the open / close valve unit since these valve units are provided in the second branch line between the injector and the return line. Has a first inlet and a first outlet respectively connecting a first chamber located behind a spring-loaded closure member in the injector to a supply line and a return line, the injector located in front of the closure member The second chamber is connected to a third branch line connecting the second chamber of the injector to the supply line, and the control unit is coupled to at least the open / close valve unit When It is achieved by a novel system in earthenware pots point.

  The method of the present invention is connected to a return line leading to a lubricating oil supply via a second branch line for the injector to circulate the lubricating oil, and the open / close valve unit is connected to the injector unit. Between the return line and the second branch line so that it is coupled to the return line and the open / close valve unit is spring-loaded closed in the injector via the first inlet and the first outlet A first chamber located behind the member is connected to the supply line and the return line, respectively, and the injector has a second chamber located in front of the closure member, the second chamber being the second chamber of the injector. Connected to a third branch line connecting the chamber to the supply line, control of the lubricant metering is performed by opening and closing an open / close valve unit in the branch line between the injector and the return line. point It is a Oite new.

  Thus, the system of the present invention is based on the feature that the chamber of the injector located in front of the closure member is always connected to the supply line and is thus under a constant supply pressure supplied by the lubricating oil pump. The lubricating oil pump may be driven electrically or mechanically.

  The chamber of the injection device located behind the closure member is coupled to the supply line, thus, when the injection device is closed, the chamber located in front of the closure member when the closure member is pressed against the nozzle hole by a spring It is under the same pressure as the inside pressure.

  The injection device is opened by removing the pressure in the chamber located behind the closure member. This is done by resetting the open / close valve unit and coupling the chamber located behind the closure member to the return line. Thereby, the pressure of the lubricating oil in the chamber located in front of the closing member becomes larger than the force from the spring, so that the closing member is displaced away from the nozzle hole. Thereby, the injection is immediately performed at a pressure corresponding to the pressure of the lubricating oil from the start of the injection. The pressure in the supply line is typically 70 bar or higher.

  The injection device is closed by reestablishing the pressure in the chamber located behind the closure member. This is done by resetting the open / close valve unit and coupling the chamber located behind the closure member to the supply line. Thereby, the pressure of the lubricating oil in the chamber located behind the closing member, together with the spring, is greater than the pressure of the lubricating oil in the chamber located in front of the closing member, so that the closing member Is displaced so as to contact the nozzle hole. Thereby, the injection is interrupted immediately.

  The amount of lubricating oil injected is controlled by controlling the opening time of the injector, i.e. the period during which the pressure in the chamber located behind the closure member is removed. Since the consumption in the branch line between the injector and the return line in opening the injector is almost zero, these can be controlled very accurately.

  The opening time of the injector can be derived from experimentally obtained values. These experimental values may include data relating to oil, pressure, flow rate, demand for lubricating oil, etc., and may be stored in the control unit. These data are used to control the movement of the opening / closing valve unit and thus the opening time of the injector.

  The applied experimental values can in some cases be corrected based on data obtained by measuring the lubricant flow rate.

  This system can be operated by one or two simple lubricant pumps. These may be of relatively low capacity. This is because the pump capacity is only slightly higher than the maximum lubricant consumption of the engine. At the same time, the pump energy is converted into lubricating oil and heating of the open / close valve unit.

  This system can be used in various cylinder lubrication schemes, such as SIP lubrication schemes (eg as described in WO 00/28194), spray lubrication schemes, one or more oil jets per injector. Used by a jet lubrication system (for example, described in EP 1350929), a pulse jet lubrication system (for example, described in a booklet of Wartsila) or a combination thereof. It has become so. If the system is described in terms of a specific application area, for example a SIP lubrication scheme, this should not be construed as a limitation of the system, but only as an example of the specific advantages achieved by the system. Absent.

  All sensitive functions associated with a SIP valve with a monitor and function sensor as a stroke set overpressure valve are unnecessary. The only remaining elements are two mutually coupled solenoid valves and possibly a simple volume meter, for example in the form of an oval gear flow meter.

  It is noted that the system as an alternative embodiment can be designed without a capacity meter. Experimental work (or installation-specific or structure-specific work) determines the correlation between the “open time” for the system and the amount of lubricant delivered. Thereby, the need for a capacity meter or flow measuring device is redundant.

  In such systems where no volume meter is provided, the pipes, valves, pumps, etc. are preferably designed to ensure a constant temperature of the lubricant / pipe.

  At the same time, it is hypothesized that the sensitivity of the SIP valve to microparticles in the lubricating oil decreases because there is a pressure drop across the needle guide only when the valve is opened. None of the valves will be open to cylinder pressure. This is because the closing pressure is always very high.

  The injection device can be simplified as it can relax the tolerances and requirements for the degree of fit between the closure member / needle and the chamber / guide. This is because these effects on the amount of lubricant delivered can be largely ignored.

  According to another embodiment of the invention, the metering system measures the amount of added lubricant per cylinder in a branch line connecting the second chamber of the injector to the supply line. A capacity meter is provided and the control unit is novel in that it is coupled to the capacity meter.

  According to another embodiment of the present invention, the method of the present invention is such that measuring the amount of supply lubricant per cylinder connects a second chamber located in front of the closing member of the injector to the supply line. It is novel in that it is implemented in the branch line.

  Lubricating oil is supplied to the injector chamber that performs the injection through a volume meter, and the volume meter is inserted into a common tube that couples the injector chamber to the supply line.

  Thereby, it is possible to measure the amount of lubricating oil supplied per cylinder and thus to determine the injection time for a given oil consumption. Preferably, the amount of lubricating oil supplied per cylinder is measured by a capacity meter, for example in the form of an oval gear flow meter. The injection time can be adjusted by a PID (proportional-integral-derivative) adjustment loop. This is a closed loop adjustment method in which compensation for the expected deviation to be measured is made.

  The capacity meter is used simultaneously to monitor the function of the metering system. If no consumption is shown, something is wrong. Thus, if a deviating consumption exceeding the expected value is indicated, it can be assumed that the injector is leaking or clogged.

  Other alarm functions that can be monitored by the detector or detected by the control unit are insufficient oil pressure, too high back pressure in the filter, too high or too low oil temperature, or computer related errors. The control unit includes a computer-based electronic control system that may have an expansion card for an engine with nine or more cylinders.

  Also, a backup system including easily replaceable units, injectors, open / close valve units, computer prints, etc. or overlapping means for various functions may be provided. For example, a large engine may be split so that there are two computers, two open / close valve units, two transmitters and two networks. One system controls every other injector in the cylinder and the other system controls the remaining injectors. In case of an error, the defective system is shut down and the other system continues in double amounts until the error is corrected.

  According to an alternative embodiment, the method of the present invention is such that an experimental determination of the correlation between the opening time and the amount of lubricant delivered is defined for a given system and these data are stored in the control unit. It is novel in that it is used to control the metering of lubricant.

  This system may be designed without a capacity meter / capacitance measurement. Experimental work (or installation-specific or structure-specific work) determines the correlation between the “open time” for the system and the amount of lubricant delivered. Thereby, the need for a capacity meter or flow measuring device is redundant.

  In such systems where no volume meter is provided, the pipes, valves, pumps, etc. are preferably designed to ensure a constant temperature of the lubricant / pipe.

  According to another embodiment of the present invention, the metering system includes an opening / closing valve unit, wherein the first chamber and the second chamber of the injector are connected to the supply line in a closing condition of the injector, It is novel in that the first chamber is coupled to be connected to the return line in the opening condition of the injector. Thus, the pipe system for each engine cylinder couples a number of injectors to one open / close valve unit which is connected via a common pipe to the return oil side of the injector. Combined with

  According to another embodiment of the present invention, the method of the present invention is such that the first and second chambers of the injector formed respectively behind and in front of the injector closing member are in the injector closing condition. Coupled to the supply line, it is novel in that the first chamber of the injector is connected to the return line in the open condition of the injector.

  According to another embodiment of the invention, the metering system is provided with one open / close valve unit and one capacity meter (if a capacity meter is provided) for all injectors provided in one cylinder. New in that it is This allows simplification of the design of the metering system and furthermore simplifies the control compared to a system in which an open / close valve unit and a capacity meter are provided for each injector.

  According to another embodiment of the invention, the metering system is novel in that an open / close valve unit is coupled to each of the injectors via a port via a connecting pipe of equal length. . This guarantees a constant response time for the individual injectors. This is because the length of the individual tube sections on the return side of the injector is as identical as possible for all injectors.

  According to another embodiment of the present invention, the metering system of the present invention comprises a pressure valve at these ends where the supply line and the return line are located farthest from the lubricating oil supply, The valve is novel in that it ensures a controlled circulation of the lubricating oil. Lubricating oil pumps with filters and motor boards and other elements can be installed at the end of the engine or at another suitable location.

  The lubricating oil tubing includes a supply line that leads under lubricating oil pressure and a return line that returns excess lubricating oil to the lubricating oil pump, which are provided along the longitudinal axis of the engine. The pressure valve of the lubricating oil system is provided at the opposite end of the engine with respect to the lubricating oil pump so that the lubricating oil continuously circulates throughout the pipe system. Thereby, the pump energy is converted into heating of the lubricating oil in the pipe, and a constant temperature can be achieved. This prevents local overheating of the lubricating oil, thus eliminating the need for cooling the lubricating oil.

  According to another embodiment, the metering system of the present invention is novel in that the open / close valve unit has at least two mutually coupled valves.

  Thus, an open / close valve unit that controls the pressure in the branch line coupled to the return line may include two solenoid valves, which each control the open time and close time separately. Are coupled to each other.

  The open / close valve units are arranged opposite each cylinder if they are for completeness, otherwise between the two cylinders. The open / close valve unit may be connected to the cylinder system by two short pipes if the cylinder is equipped with pre-installed injection devices and pipes connecting these injection devices to each other. In order to facilitate separation, hoses and connectors can be used as an alternative to the two connecting pipes.

  The open / close valve unit typically causes one valve to open the injector by lowering the pressure in the injector return line and the other valve to close the injector by pressurizing the return line. Consists of two coupled three-way solenoid valves. The reason for using two valves is that the opening time of the injector is only a few milliseconds depending on the desired amount of lubricant to be delivered by the injector. Typical commercial solenoid valves have a response time that is much longer than that required to achieve a small amount of injected lubricant. By utilizing motion overlap for the two valves, a very short opening time is achieved for the injector, and thus an even small fraction of the lubricating oil by using a simple and inexpensive valve with a long response time. It is possible to achieve the possibility of accurate delivery.

  Alternatively, a constant overlap between the movements of the two valves can be used to vary the pressure in the supply line and thereby adjust the amount of lubricant injected. This is particularly advantageous because a small amount of lubricating oil can be injected.

  Each open / close valve unit and the capacity meter are preferably coupled to the computer by a shielded cable, for example an 8-pole shielded cable (2 poles per solenoid valve and 4 poles for the capacity meter). It is also advantageous to reduce the number of conductors to be led to the computer using one cable for power supply and one cable for signal transmission. Thus, the system is provided with a very simplified tube and cable configuration.

  The display may be attached to the engine or placed close to it. Simple functions can be set and read on the display. General functions and settings are usually based on computers located in the control room.

  The lubricating oil part for each individual cylinder can be controlled by measuring the actual consumption, and the adjustment loop allows the opening / closing valve unit opening time to achieve the desired amount of lubricating oil. It is good to adjust.

  The lubrication time and the amount of lubricating oil are controlled by the control unit controlling each open / close valve unit based on the given data and measurement, the given data and measurement being stored in the control unit or It is measured via a sensor and sent to the control unit. Thus, the capacity meter is individual in that the control unit compares the actual consumption with the expected consumption at a given pressure and temperature of the lubricant that deviates if the nozzle is leaking or clogged. The cylinder unit injection device monitoring function is executed.

  According to another embodiment of the present invention, the method of the present invention is novel in that the control of lube oil metering includes control of the open time and hold time for at least two valve elements in the open / close valve unit. It is. As mentioned above, this provides a very simple means of accurately adjusting a small and even portion of lubricating oil.

  The control unit may form part of a computer system comprising a central computer that performs control of the system of the present invention. According to a particular embodiment, the central computer has two PCs: a main PC and a backup PC.

The control is very flexible, so all current operating modes can be adjusted to -rpm dependent adjustment, i.e. unregulated operation,
-Bhp dependent adjustment method, that is, load dependent adjustment method of the amount of lubricating oil,
-Mep dependent adjustment method, i.e., cylinder pressure dependent adjustment method of lubricating oil, or-Load change dependent adjustment method, i.e., separate lubrication method related to load change.

Moreover, it is possible to establish a flexible control system that allows for advanced user-specified adjustment algorithms,
-Variation of standard operating mode,
-Adjustment algorithms based on data input (FE content, cylinder pressure, cylinder temperature, etc.) based in whole or in part on customer specified data input, eg various sensors (input can be used for the entire engine or for individual cylinders) )
-Includes the possibility of implementing an overlay mode in which the user writes his / her own decrease and / or increase percentage.

  The control is carried out in such a way that local data can be collected within / at the individual cylinder, and the upper control has the possibility of controlling the amount of lubricant delivered in accordance with the expected / planed amount of lubricant. To be implemented.

  Establish local controls that allow users to perform local data collection within / individual cylinders and have the potential to use these online data inputs to adjust feed rates and possibly timing Is possible. For example, a temperature sensor can be provided in the cylinder and a flow meter can be provided in the fuel supply for the individual cylinder, and then control can determine how to adjust the timing and related quantities.

  Added to this is the ability to gather local information on conditions for individual cylinders, for example, achieving the possibility of checking whether the lubricant supply is in line with the expected / planed lubricant supply In this way, for example, a flow meter and / or a temperature sensor can be provided on the side of the individual injectors, and this information regarding the conditions can be sent via a network to the host controller.

  Furthermore, flow measurement can be performed in other ways.

  Instead of controlling the function of the flow meter, a two-valve slider monitor that changes position may be incorporated. For example, one or two induction encoders may be provided for each valve. These encoders detect when the valve slider is in the relevant end position. Such alternative means may optionally be combined with the provision of two flow meters in the supply line and return line, respectively, immediately in the pump station. Thereby, it is possible to control the total consumption of the entire system.

  According to another variant, the flow meter is changed immediately from the pump station to a system in which two flow meters are used for the supply line and the return line respectively, instead of being a local unit per metering unit. Can do. Thereby, the total consumption of the entire system can be controlled.

  In the above-described embodiment, it is assumed that the supply pressure for the injector is constant. However, it is also possible to operate the embodiments with variable working pressure in the supply line for the lubricating oil. Thus, the working pressure can be varied depending on existing conditions (metering supply, temperature, pressure in the cylinder, load on the cylinder / engine, etc.).

  According to another embodiment, by reducing the metering part, a high supply pressure can be used in the supply line, so that the quantity of lubricant to be metered is well distributed. Such a measure makes it possible to implement a stepless adjustment of the supply pressure on the basis of data recorded in advance through a control unit by incorporating a pressure regulating valve around the pump station. Thereby, the metering oil can be delivered in a form that is optimal according to the conditions.

  As another variant embodiment, a technically simple solution using an on / off solenoid valve capable of automatically raising and lowering the pressure level instead of a continuously variable pressure regulating valve can be employed.

  The present invention will be described in detail below with reference to the accompanying drawings.

1 is an overall block diagram of a metering system of the present invention in an engine with five cylinders and a central lubricant supply in the form of a pump station. FIG. 2 is an overall configuration diagram of a valve unit including two three-way valves used in the metering system shown in FIG. 1, and three different operating positions (A, B, C) for the valve unit in the closed position and the open position. ). FIG. 3 is a schematic diagram showing the transition of a time-dependent injection cycle in which the valve unit shown in FIG. 2 is used in the metering system shown in FIG. It is a side view of a valve unit. FIG. 5 is a side view of the valve unit shown in FIG. 4 as viewed along line VV in FIG. 4. FIG. 2 is a view corresponding to FIG. 1 but showing a system in which a central lubricant supply in the form of a central accumulator is used. FIG. 2 is a diagram corresponding to FIG. 1 but showing a system in which a flow meter is used for each of a supply line and a return line. FIG. 2 is a view corresponding to FIG. 1 but showing a system in which a flow meter is used for the supply line and the return line, respectively, with detection of the position of the valve slider. FIG. 2 is a diagram corresponding to FIG. 1, but showing a system operating with a variable working pressure of lubricating oil. FIG. 2 is a diagram corresponding to FIG. 1, but showing another system that operates with variable working pressure of lubricating oil.

  The metering system includes a pump station 1. Cylinder lubricating oil is guided under pressure from the pump station 1 through a supply line 31 extending along the five cylinders 5 in the engine 32 to the pressure valve 2 located at the end of the engine 5. Excess lubricant is fed back to the pump station through a return line 33 extending in parallel. Thereby, the energy of the pump is converted into the heating of the lubricating oil in the supply line 31 and the return line 33, thereby ensuring a reasonably constant temperature of the lubricating oil in the supply line and the return line and of the oil. Local overheating is prevented. Oil is supplied to the pump station 1 through a supply line 34.

  The pump station 1 has two pumps 11, two filters 12 and two check valves 13 that prevent the lubricating oil from returning through the stationary mold 11. The pump station further has two shut-off valves 14 inserted into the supply line 34 so that the filter 12 can be cleaned during operation. The two pumps 11 are auxiliary pumps, and automatically start when the hydraulic pressure decreases.

  For each engine cylinder 5, an open / close valve unit 3 is connected to the supply line 31 and the return line 33, which open / close valve unit 3 is connected to the supply line 31 with the port P and the first and It has a port R coupled to the return line 33 via second branch lines 15 and 16. Each open / close valve unit 3 has a port A coupled to a number of lubricating oil injection devices 6 provided in the engine cylinder 5 via a common pipe 8. The common pipe 8 is connected to a return line 17 (see FIG. 2) of the injection device. Lubricating oil that can be injected into the engine cylinder 5 from the supply line 31 is supplied to the injection device 6 through the third branch line 7 provided with the capacity meter 4.

  As mentioned above, the system may alternatively be designed without a capacity meter. Experimental work (or installation-specific work) determines the correlation between “operation time” and the amount of lubricant delivered for the system.

  The open / close valve unit 3 comprises two three-way valves V1 and V2 (typically electromagnetic valves) connected to each other as shown in FIG. For illustration purposes, only one injection device 6 associated with the open / close valve unit 3 is shown in FIG. Each valve unit has two ports P coupled to the supply line 31 and a port R coupled to the return line 33. Further, the two valves V1 and V2 are coupled to each other via ports B and C.

  Furthermore, a control unit 25 is shown, which is coupled to the open / close valve unit 3 via a connection 26, which receives a control signal from the control unit and provides feedback information. Is sent to the control unit 25. The control unit 25 receives feedback information from the capacity meter 4 via the connecting portion 27. These connecting portions are provided in a number corresponding to the number of cylinders in the engine.

  The control unit has many separate connections for normal operation, for example by feedback signals from the crankshaft, engine load, pressure conditions, lube oil temperature, pre-programmed data etc. and control signals for eg alarms, continuous data collection etc. It further has a part.

  In FIG. 2A, the injection device 6 is illustrated with a closure member 18 with a pointed end 19 that closes the nozzle opening 20 of the injection device 6. The lubricant spray 21 (see FIG. 2B) is injected into the cylinder 5 through the nozzle opening. A first chamber 22 is formed at the rear end portion of the closing member 18, and a spring 23 that presses the closing member and closes the nozzle hole 20 is provided in the first chamber. . A second chamber 24 is formed in front of the closure member 18 and around the pointed end, which is injected from the supply line 31 through the branch line 7 into the engine cylinder. Possible lubricating oil is put.

  The return line 17 of the injector appears to be under full supply pressure via port A and common tube 8 when the injector is closed. Thus, one valve V1 opens the injector 6 by lowering the pressure in the return line 17 of the injector and the other valve V2 closes the injector 6 by pressurizing the return line 17.

  FIG. 2B shows the activated V1 and the pressure in the first chamber 22 of the injector located behind the closure member can escape to the return port R through V1, V2, The pressure is much lower than that of the supply port P. The supply pressure of the lubricating oil from the branch line 7 exceeds the spring force, causing the closing member 18 to return from the closed contact state with the nozzle hole 20, and as a result, the lubricating oil 21 is injected into the cylinder 5. It becomes like this. This is caused by the high supply pressure in the second chamber 24 from the start of injection.

  FIG. 2C shows a state in which both V1 and V2 are activated. Thereby, V2 opens for the port P which is coupled to the supply line 31, and the lubricating oil is forced into the first chamber 22 through V1, which is the rear side of the closure member 18. To work. Thereby, the pressure applied to both sides of the closing member 18 is of equal magnitude, and therefore the spring 23 pushes the closing member forward to close the nozzle hole 20.

  Next, V1 may be deactivated to maintain the pressure applied to the rear side of the injector, and then V2 may be deactivated to start a new cycle again.

  By using the two valves V1, V2, it is possible to achieve that the opening time of the injector 6 is only a few milliseconds, depending on the desired amount of oil to be delivered by the injector.

  FIG. 3 shows the transition of the injection cycle over time. At time T1, a position signal 28 relating to the crank angle and thereby the position of the piston in the cylinder 5 is provided to the control unit 25, which outputs an actuation signal relating to the valve V1 at time T2. The valve V1 starts injection of lubricating oil into the cylinder at time T3 with a delay time 29 indicated by T3-T2. The control unit 25 also sends an actuation signal T4 to the valve V2 to stop the injection of lubricating oil. The injection of lubricating oil is stopped at time T5 in a state where the valve V2 is operated and has the delay time 30 indicated by the time interval T5-T4. The stoppage of the valves V1 and V2 occurs at times T6 and T7. The lubricating oil portion for each cylinder 5 is controlled by measuring the actual consumption by the capacity meter 4, and by feedback to the control unit 25, the opening time of the injection device 6 is stored in the control unit. It is adjusted when a deviation from a given value occurs.

  The lubrication time and the amount of lubricating oil are controlled by the control unit 25 controlling the open / close valve unit 3 of each cylinder 5 based on given data and measurements stored in the control unit 25.

  In order to ensure a uniform response time for the individual injectors 6, the supply tube 8 is divided into several single tube pieces on the return side of the injectors, and an opening associated with each injector 6. / The tube lengths 8 between the closing valves 3 are the same.

  At the same time, the capacity meter 4 has a function of monitoring that the control unit 25 is in an operating state. The capacity meter 4 detects the consumption amount when operated by the control unit 25. The individual injectors 6 for each cylinder 5 are also controlled because the control unit 25 compares the actual consumption with the expected value at a given pressure and a given temperature of lubricant. Deviations appear, for example, when the injector 6 is leaking or clogged. As a result, the control unit 25 issues an alarm.

  To achieve additional reliability, the metering system sends every function from an independent lubrication system to every other injector 6 in the cylinder 5 and feeds from corresponding units that the other half monitor each other. In the case of an error, the normally operating system takes over the entire cylinder lubrication by doubling the amount of lubricant delivered from half the number of nozzles.

  The arrangement for the open / close valve unit 3 for two cylinders is shown in FIGS. The illustrated configuration is provided by a joint 35 and a mounting screw 36 between the two cylinders 5. The unit shown is configured with two identical open / close valve units 3 for completeness.

  Each of the two open / close valve units 3 has a valve block 37 with a switch valve 38, which can be set in an open position and a closed position. This configuration includes a flow control block 39 with a terminal box 45 having a flow indicator 40 and on / off indicators 41 and 42 for solenoid valves, and a valve control block 43 to which two solenoid valves 44 are attached. It has further. The connection lines 8, 15, 16 and ports A, P, R are given the same reference numerals as shown in connection with the description of the system shown in FIG.

  FIG. 6 shows a modified embodiment of the system shown in FIG. Identical and corresponding elements are denoted with the same reference signs. In the system shown in FIG. 6, instead of direct delivery from the central pump unit 1, a central accumulator 100 for lubricating oil delivery is used. By using the central accumulator 100, it is possible to average out the pressure variations that can occur in a particularly safe manner. Thus, the pressure becomes constant, and at the same time, it becomes easy to control the feed amount of the lubricating oil.

  FIG. 6 further illustrates another embodiment of the system of the present invention in dashed lines, in which case a local accumulator 101 is shown. In this embodiment, the central accumulator 100 is thus not normally present and the central lubricating oil source 1 is still provided. The local accumulator 101 is provided in the branch line 7 between the supply line 31 and the injection device 6. The local accumulator 101 is shown on the right side in front of the capacity meter 4, but as a modification, it may be arranged on the right side behind the capacity meter. A local accumulator 101 is shown for each cylinder.

  FIG. 6 shows examples of feedback signals received by the control unit 25 and examples of signals and data sent from the control unit 25.

  FIG. 7 shows an embodiment in which two flow meters 110, 111 are provided in the supply line 31 and the return line 33 when they are immediately coupled to the pump station 1. Thereby, it is possible to control the total consumption of the entire system.

  FIG. 8 shows an embodiment in which two valve slider monitoring means for changing the position are provided. For example, one or two induction encoders may be provided for each valve. These encoders detect when the valve slider is in the relevant end position and send a signal 109 to the control unit 25. Such alternative means may optionally be combined with the mounting of the two flow meters 110, 111 shown in FIG. 8, for example. Thereby, it is possible to control the total consumption of the entire system.

Under certain conditions, it may be desirable to adapt the delivery characteristics of the supplied lubricant through the injector. This can be achieved by changing the pressure in the supply line 31 and thereby further in the branch line 15. Thereby, additional control parameters are added that allow changes in the propagation, composition (e.g. droplet size, quantity and density) and velocity of the delivered lubricant. Changes in pressure include metered supply, cylinder temperature, pressure, cylinder / engine load, etc.
Rapid delivery of lubricating oil at high pressure in supply line 31;
It may be determined by a fine spray / jet at high pressure in the supply line 31.

  In FIG. 9, a system operating with variable working pressure of the lubricating oil can be seen. Instead of the pressure valve 2, two pressure valves 112 and 113 each having a respective pressure set value are used. In this case, the pressure valve 112 is set to a pressure higher than that of the pressure valve 113. The solenoid valve 110 may prevent access to the valve 112 so that the pressure is adjusted to the level of the pressure valve 113. Reference numeral 116 indicates a connection between the control unit 25 and the pressure valve 110.

  FIG. 10 shows a modified embodiment in which a continuously variable electric regulating pressure valve 115 is used in place of the pressure valve 2, and this pressure valve 115 provides the most flexible control. Also, the pressure valve 115 appears to be coupled to the control unit 25 via the coupling 116 from where the pressure is controlled according to conditions.

  As yet another embodiment, a technically simple solution can be configured. In this solution, an on / off solenoid valve capable of automatically raising and lowering the pressure level is used instead of the continuously variable pressure regulating valve. be able to.

DESCRIPTION OF SYMBOLS 1 Pump station 2 Pressure valve 3 Valve unit 5 Diesel engine cylinder 6 Injection device 7 Branch line 18 Spring pushing closure member 20 Nozzle hole 21 Lubricating oil spray 22 1st chamber 24 2nd chamber 25 Control unit 27 Connection part 32 For ships Engine 31 Supply line 33 Return line 101 Local accumulator A, B, C, P, R Port V1, V2 Three-way valve

Claims (14)

A system for metering cylinder lubricant into a diesel motor, for example, a large cylinder of a marine engine,
-Having a central lubricating oil source configurable by a central pumping station (1) or a central accumulator;
-Having a supply line (31) from a lubricant source;
-The number of the injection devices (6) corresponding to the number of the cylinders (5) in the engine or a multiple of the cylinders (5), wherein the injection device supplies the cylinder lubricating oil (21) to one or more nozzle holes; (20) via an injection to the relevant cylinder (5), the injection device being connected to the supply line (31) via a branch line (15),
-Having an open / close valve unit (3) provided in the branch line (15) between the injector (6) and the supply line (31);
A metering device having a control unit (25) for controlling each open / close valve unit (3),
The injection device (6) is connected to a return line (33) leading to the lubricating oil supply via a second branch line (16) for circulating lubricating oil, and the open / close valve unit ( 3) Since these valve units (3) are provided in the second branch line (16) between the injector (6) and the return line (33), the return line (33) The open / close valve unit (3) is connected to the supply line (31) and the first chamber (22) located behind the spring-loaded closing member (18) in the injector, respectively. A first inlet (P) and a first outlet (R) coupled to a return line (33), the injector (6) being a second chamber located in front of the closure member (18) (24), the second chamber (24) Connected to a third branch line (7) connecting the second chamber (24) of the injector to the supply line (31), the control unit (25) is at least the open / close valve unit A metering system coupled to (3).   In the branch line (7) connecting the second chamber (24) of the injector to the supply line, a capacity meter (4) for measuring the amount of the added lubricating oil per cylinder The metering system according to claim 1, wherein the control unit (25) is coupled to the capacity meter (4).   The open / close valve unit (3) is configured such that the first chamber (22) and the second chamber (24) of the injection device are connected to the supply line (31) in a closing condition of the injection device, 3. A metering system according to claim 1 or 2, wherein the first chamber (22) of the injector is coupled to be connected to the return line (33) in an open condition of the injector.   4. Metering supply system according to any one of claims 1 to 3, wherein one open / close valve unit (3) is provided for all the injection devices (6) provided in one cylinder (5). .   3. The one open / close valve unit (3) and the one capacity meter (4) are provided for all injection devices (6) provided in one cylinder (5). Or the metering supply system of 3.   6. The open / close valve unit (3) is connected to each of the injection devices (6) via a port (A) via a connecting pipe (8) of equal length. Metering system.   The supply line (31) and the return line (33) have pressure valves (2) at their farthest ends as viewed from the lubricant supply, the pressure valve (2) A metering system according to any one of the preceding claims, which ensures a controlled circulation of the lubricating oil.   8. Metering system according to any one of the preceding claims, wherein the open / close valve unit (3) comprises at least two valves (V1, V2) coupled to one another.   A method of metering and supplying cylinder lubricant to a diesel engine (32), for example, a large cylinder in a marine engine, wherein the lubricant in a central lubricant supply source configurable by a central pump station (1) or a central accumulator is used. Pressurizing and supplying the lubricating oil through a supply line (31), corresponding to the number of cylinders of the engine or a multiple thereof, each one or more Injecting cylinder lubricating oil into the associated cylinder (5) via a number of injection devices (6) with nozzle holes (20), said injection devices being via branch lines (7, 15) Is connected to the supply line (31) by opening and closing the open / close valve unit (3) provided in the branch line, and by the control unit (25). In the method, comprising the step of controlling each open / close valve unit (3), the injector (6) is connected to the lubricating oil supply via a second branch line (16) for circulating lubricating oil. The open / close valve unit (3) is connected to a return line (33) that leads to the second line between the injector (6) and the return line (33). Is connected to the return line (33), and the open / close valve unit (3) has a first inlet (P) and a first outlet (R). The first chamber (22) located behind the spring-loaded closing member (18) in the injection device is connected to the supply line (31) and the return line (33), respectively, and the injection device (6 ) In front of the closure member (18) A second branch line (24) positioned, the second chamber (24) connecting the second chamber (24) of the injector to the supply line (31). Connected to (7), the control of the lubricating oil metering opens and closes the open / close valve unit (3) in the branch line (16) between the injector and the return line (33) A method carried out by:   The amount of the supply lubricant per cylinder is measured by a branch line (7) connecting a second chamber (24) located in front of the closing member (18) of the injector to the supply line (31). 10. The method of claim 9, wherein   An experimental determination of the correlation between opening time and lubricant delivery is defined for a given system and these data are stored in the control unit and used to control the lubricant metering. 10. The method of claim 9, wherein:   The first chamber (22) and the second chamber (24) of the injection device respectively formed behind and in front of the closing member of the injection device are connected to the supply line (in the closing condition of the injection device). 31), wherein the first chamber (22) of the injection device is connected to the return line (33) in the opening condition of the injection device. The method described.   Control of the lubricating oil metering includes control of open time and hold time for at least two valve elements (V1, V2) in the open / close valve unit (3). The method according to 1.   14. A method according to any one of claims 9 to 13, wherein the control of the lubricating oil metering includes variable pressure in the supply line.

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