Abstract:
There is disclosed an injector (1), a method and a dosing system for injecting cylinder lubrication oil in large diesel engine cylinders, e.g. in marine engines. A number of injectors are arranged in a plane perpendicular to the cylinder axis, and each injector includes an injector housing (25) and a nozzle tip (5) provided in continuation of the injector housing, the nozzle tip provided at its outer free end with several nozzle apertures (10) for delivering several lubricating oil jets (A, B, C, D) from each injector onto the cylinder wall (10). In order to perform even distribution of the lubricating oil even if the injectors are not evenly distributed along the periphery of the cylinder, the nozzle apertures are provided under different angles radially relative to a centre line (22) through the nozzle tip as well as axially relatively to a plane perpendicular to the centre line of the nozzle tip. Hereby, the centre (15) of the lubricating oil jets (A, B, C, D) will be provided on the cylinder wall at the same level above the injectors but at different areas of the periphery of the cylinder wall.
Abstract:
There is disclosed dosing system and a method for cylinder lubrication oil in large diesel engine cylinders, e.g. in marine engines, including: - a lubricating oil supply that may be constituted by a pump station or an accumulator; - a supply line from the lubricating oil supply; - a number of injectors having an inlet, an opening/closing valve unit and one or more nozzle apertures for injecting cylinder lubricating oil into an associated cylinder, and which are connected with the supply line and corresponding to the number of cylinders in the engine or a multiple thereof; and - a control unit controlling each opening/closing valve unit. Furthermore, there is disclosed an injector for use in the system. In order to overcome the drawback of dependence on flow and viscosity in the supply pipes, the system is peculiar in that the dosing system includes a flow measuring unit for each injector and/or for each cylinder, and that the flow measuring units are connected with the control unit for use in a closed circuit regulation.
Abstract:
There is described a hydraulic lubricating apparatus (252) for dosing cylinder lubricating oil, including a housing which via one or more valves (220) is connected to a source for supplying hydraulic oil (262) and cylinder lubricating oil (not shown), a number of hydraulic cylinders each having a hydraulic piston (6) and which may be pressurised by hydraulic oil. Furthermore, there are a number of injection units (251) corresponding to a multiple of the cylinder (250) number in the engine, and which are connected with each their dosing cylinder by a dosing piston (21). Also, there is provided a distributor plate (7) which at one side is in contact with the dosing pistons (21) and which at its other side is in contact with the hydraulic pistons (6) for displacing the distributor plate for actuating the dosing pistons. The hydraulic pistons (6) are provided in groups, where each group is adapted for independent displacement of the distributor plate (7) for actuating the dosing pistons, and where each group of hydraulic pistons have each their individual stroke. In that way there may be achieved an individual quantity adjustment of lubricating oil, depending on the group of hydraulic pistons that is activated.
Abstract:
There is described a method and a system for lubricating the cylinder surfaces 1 in large diesel engines. The system includes a lubricating apparatus 3 with a number of reciprocating pumps 4 which via connecting lines 5 are connected with lubricating points 6 in the cylinder linings 7. In order to enable electronically controlled regulation of the lubricating oil portion, there is provided an electronic control unit 9 which is connected with a flow regulator 8.
Abstract:
There is described a method and an installation for lubricating cylinder surfaces 6 in large diesel engines. The installation includes a lubricating apparatus 3 with a number of piston pumps 4 which via connecting lines 5 are connected with lubricating points 6 in the cylinder walls 7. In order to enable electronically controlled regulation of the lubricating oil portion, there is provided an electronic control unit 9 which is connected with a flow regulator 8. The flow regulator includes redirecting valves 12 which are inserted in connecting lines 5 between the lubricating apparatus 3 and the lubricating points 6.
Abstract:
The present invention presents a method for lubricating large slow-running marine diesel engines, having at least one cylinder (51) with a piston (52) having a ring pack (56, 57). Injection of lubricating oil is performed via an injection unit (53) for each cylinder. Each injection unit is controlled by a control unit (254) where a plurality of lubrication routines are stored in a memory. The control unit receives input either from an input station or from one or more sensors. The input may determine implementation of one of a multitude of possible lubrication routines, where each lubrication routine is distinguished by a duration, a feed rate adjustment in percentage of the total needed lubricating oil amount and two or more distinct injection phases relative to the position of the piston. Each of the two or more distinct injection phases will inject a quantity of lubricating oil expressed in percentages of the total amount of lubricating oil to be injected.
Abstract:
A large engine, in particular a marine engine or engine for power plants, a multiple-oil injector (4) and a method of lubricating the engine with a plurality of injectors (4) wherein the injectors comprise a first and a second lubricant inlet, an internal electrically actuated selection-valve system (13) that can switch between two different types of lubricants.
Abstract:
By mounting an insert as a substitution for an existing valve-seat (24) of a non-return valve system (102) in a lubricator pump unit (11), especially of the Alpha-type, a lubrication system in a large slow-running two-stroke engine is improved.
Abstract:
By deforming the valve-seat (23) of a non-return valve system (102) in a lubricator pump unit (11), especially of the Alpha-type, a lubrication system in a large slow- running two-stroke engine is improved.
Abstract:
A large slow-running two-stroke engine comprising a cylinder (1) with a reciprocal piston inside and with a plurality of injectors (4) distributed along a perimeter of the cylinder (1) for injection of lubricant into the cylinder (1) at various positions on the perimeter; the engine further comprising a controller (11) for controlling the amount and timing of the lubricant injection by at least one of the injectors (4); wherein each injector (4) comprises a lubricant inlet (12) for receiving lubricant from a lubricant feed conduit (9); a nozzle (5) with a nozzle aperture (5') extending into the cylinder (1) for injecting lubricant from the inlet (12) into a cylinder (1) in an injection phase; an outlet-valve system (15) at the nozzle (5) for opening and closing for flow of lubricant to the nozzle aperture (5') during an injection cycle; the outlet-valve system (15) being configured for opening for flow of lubricant to the nozzle aperture (5 ") during an injection phase upon pressure rise above a predetermined limit at the outlet- valve system (15) and for closing the outlet- valve system ( 15) after the injection phase; a lubricant flow path from the lubricant inlet (12) to the outlet-valve system (15) for flow of the lubricant from the lubricant inlet (12) and to the nozzle (5), through the outlet-valve system (15) and out of the injector (4) at the nozzle aperture (5'); wherein each injector (4) comprises an electrically-driven inlet-valve system (13) electrically connected to the controller (11) for regulating the lubricant that is dispensed through the nozzle aperture (5 ') by opening or closing for lubricant flow from the lubricant inlet (12) to the outlet-valve system (15) in dependence of an electrical control-signal received from the controller (11); wherein electrically-driven inlet- valve system (13) is arranged upstream of the nozzle (5) and spaced from the nozzle (5) and upstream of the outlet-valve system (15) and spaced from the outlet-valve system (15).