42results about "Timed pressure lubrication" patented technology

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 pressurized 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.

An engine having a fluid lubrication and control system is provided. The engine also includes a pump configured to maintain fluid pressure in the lubrication and control system when the engine is running. The engine additionally includes an accumulator in fluid communication with the lubrication and control system. The accumulator is configured to accumulate and retain fluid when the engine is running, and to discharge the fluid when the engine is not running in order to maintain fluid pressure in the lubrication and control system. A method for controlling oil pressure in the engine is also provided.

The present invention refers to a method for controlling a piston cooling circuit of an internal combustion engine wherein said circuit comprises at least a circulation pump and means for emitting cooling oil connected to the delivery of the pump. According to the method, said pistons are cooled by a jet generated by said emitting means only during the upward stroke of said pistons from the bottom dead center to the top dead center.

There is described a centralised lubrication system and a method for lubricating the cylinder faces in large diesel engines, in particular marine engines. The system includes at least one lubricating apparatus (2) having a rotating control shaft (18) for preferably running synchronously with the main shaft (44) of the diesel engine. In order to make a system that does not have a mechanical drive between the lubricating apparatus (2) and the main shaft (44), the system is constructed with an AC motor (36) driving the control shaft (18). Reference means (72, 78) are provided in association with the main shaft (44), indicating the angular position of the main shaft, and sensor means (74, 76, 80) detecting the position of the reference means. Furthermore, the system includes a control unit (40) receiving signals from the sensor means and which includes means for detecting angular position as well as angular speed of the reference means and thereby of the main shaft (44). The control unit (40) is connected with and controls the AC motor (36) for regulating the rotation of the control shaft (18) and thereby actuation of reciprocating pumps providing the cylinder lubrication.

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. 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.

The invention provides a large diesel engine comprising at least one cylinder (2), the cylinder (2) having a cylinder bore (B) and a longitudinal axis (A) and the piston (3) therein being arranged capable of moving along a running surface (21), and a lubricating system (5) provided for cylinder lubrication. The lubricating system (5) includes at least two lubricating points (6) through which the lubricant is applied to the running surface (21) and a lubricant supply device (8) for delivering the lubricant from the lubricant storage (10) to the lubricating points (6). The lubricant supply device (8) includes at least one pump nozzle unit (7) provided at the lubricating points (6), and each pump nozzle unit (7) includes a pump (72) connected to at most two lubricating points (6), so that each pump nozzle unit (7) supplies lubricant to at most two lubricating points (6).

There is disclosed a method for cylinder lubrication of large diesel engines, such as marine engines. Injection of lubricating oil is performed via a number of injection units that correspond to a multiple of the cylinder number in the engine. There is desired an efficient distribution of the lubricating oil, not only across the periphery of the cylinder, but also across the travel of the piston in the cylinder in order thereby to reduce the consumption of lubricating oil. This is achieved in that lubricating oil is supplied by a combination of injection of a first part of the lubricating oil directly on a ring area of the cylinder wall before the passage of the piston and an injection of a second part of the lubricating oil directly onto the piston during its passage.

A lubrication system for an engine is provided which includes an oil tank, a first passage communicating a bottom part of the crankcase chamber with an upper part of the oil tank, a first check valve provided in the first passage to permit a flow from the crankcase chamber to the oil tank but not in a reverse direction, a second passage communicating an upper part of the oil tank with an upper part of the crankcase chamber, a second check valve provided in the second passage to permit a flow from the oil tank to the crankcase chamber but not in a reserve direction and a third passage communicating a lower part of the oil tank with the second passage.

A method and a system for establishing and executing correct automatic relubrication for a number of bearings incorporated in a grease lubrication system. The system determines initial values for the relubrication interval tf and / or lubricant volume utilizing data collected from the different bearing assemblies during operation. The data includes bearing load, bearing temperature and bearing rotational speed. A processor calculates a correct lubricant volume and a value for current lubrication interval tf by comparing an initial value with a current value. The calculated correct lubricant volume and current lubrication interval tf are supplying to an automatic lubricating apparatus, which functions in accordance with the determined values. The data collection and calculation procedures are repeated after each application of lubricant to the bearings.

The invention discloses a motor set engine lubricating oil circulation control system which comprises a starting motor, a battery, a fuel oil supply pump, a starting relay, an engine oil relay, an engine oil supply pump, a charger, a generator set operation switch, a wiring terminal, a circulation timer operation switch, a micro-control switch and an engine. The engine oil supply pump is controlled to work in a circulating and timing mode through the circulating timer operation switch, engine oil is conveyed into the engine through the output end of the engine oil supply pump, the engine is kept lubricated in the idle state, it is guaranteed that the engine can be started at any time, and engine lubricating time is not consumed any more; when the engine runs, the engine pumps engine oil through the kinetic energy of the engine so that the engine oil with the high temperature in the engine and carbides, oil sludge and abraded metal particles on engine parts can be circularly brought out of the engine, cooling of the engine and cleaning of the interior of the engine are achieved, and the service life of the engine can be prolonged.