DE102005048559A1 - Oil suction system for an internal combustion engine comprises a pump having a suction chamber connected to suction sites via suction tubes to which are assigned valves controlled so that each valve is opened in a determined sequence - Google Patents

Abstract

Oil suction system comprises a pump having a suction chamber connected to suction sites via suction tubes to which are assigned valves (4, 7) which are controlled so that each valve is opened in a determined sequence whilst the remaining valves remain closed. Preferred Features: The valves are electrically, mechanically or hydraulically operated. The suction chamber is connected to the suction tubes via a rotating perforated disk cam which is arranged in a cylindrical housing (1) delimiting the suction chamber so that the suction tubes open in a front wall.

Description

The The invention relates to an oil extraction system for one Internal combustion engine with a pump whose suction chamber over several Suction pipes connected to various extraction points, wherein the suction pipes are assigned valves.

An Indian DE 198 60 381 A1 described Ölabsaugsystem this genus serves as an intake system for the circulation lubrication of internal combustion engines. The intake pipes associated with the valves are actuated by sliding sliding by gravity shift rods such that the intake of air is prevented in the inclined position of the internal combustion engine. Since the state of the intake pipes associated valves depends solely on the inclination of the internal combustion engine, a targeted control of the valves is not possible.

modern Internal combustion engines are increasingly under difficult package conditions installed in the vehicle. The remaining space becomes ever smaller, so that in terms of engine tilt and peripherals are increasingly compromised.

Around the function and reliability of an internal combustion engine under all required conditions increasingly active systems for the vent of the crankcase (Suction pumps) as well as for the oil extraction used. The latter is known for motors with dry sump lubrication, Engines with Torboaufladung, but also with normal naturally aspirated with complicated Cylinder head geometries or high demands on the transverse and Longitudinal dynamics. In the known suction pumps, there is no extraction of a pure, d. H. homogeneous medium, but at one and the same extraction point becomes temporary a different medium e.g. Oil or air or an oil-air mixture aspirated. Therefore, it is more conventional with a suction pump Construction not possible to operate several extraction points in parallel. That's why it is common nowadays for every Extraction point a separate electrically or mechanically driven Use pump. An obvious disadvantage of this conventional oil extraction system exists in the package situation or in the costs.

Of the Invention is based on the object, a generic Ölabsaugsystem to create that independently of different pressure conditions and media simultaneous extraction at multiple extraction points allows.

According to the invention this Task with a generic Ölabsaugsystem solved, in which the valves are controllable so that each of them in one opened in certain order will, while at the same time all others Valves are closed. This idea can be combined with various constructed pumps, such as. B. a gear pump, a vane pump or a pendulum vane pump.

Thereby, that always only one suction tube is connected to the suction chamber of the pump can independently from the respective pressure conditions at each Absaugort and regardless of each sucking Medium to ensure safe suction. This can be reach both mechanically and with hydraulically actuated valves.

there can the valves can be controlled externally. It is also an internal one Control of the valves by a fixed link with the pump speed or the engine speed possible.

at a structurally particularly advantageous embodiment The invention provides that the suction chamber via a Rotating drivable perforated control disc with the individual suction tubes is connectable.

Appropriate further education The invention will become apparent from the dependent claims.

One preferred embodiment The invention is illustrated in the drawing and will be described below explained in more detail. It shows:

1 a partial longitudinal section through the suction chamber of a pump, and

2 a cross section along the line II-II in 1 ,

An oil extraction system for an internal combustion engine consists essentially of an electrically or mechanically driven pump, the suction chamber is connected via suction with different extraction points. In 1 is a suction chamber limiting part of a housing 1 such a pump shown in longitudinal section. In an end wall of the pump housing 1 is the pump shaft 2 rotatably mounted. The pump (not shown) may be a gear pump, vane pump, pendulum vane pump, or similar pump type. In an end wall of the pump housing 1 open the suction tubes 3 , At a distance from this end wall of the pump housing 1 is one with an opening 5 ver see control disk 4 arranged. The control disc 4 is with the pump shaft 2 rotatably connected. The one from the front wall of the pump housing 1 and the control disc 4 limited area of the suction chamber is defined by several radial partitions 6 into individual chambers 7 divided. For a later explained in more detail reason, the partitions 6 a different angular distance. The pump housing 1 , the suction pipe socket 3 and the partitions 7 are designed as a one-piece component.

The oil suction system works as follows: When the pump shaft 2 together with the control disk 4 rotates, then enters their opening 5 in the course of one revolution in turn with each of the chambers 7 temporarily to cover. During this period, this is in the relevant chamber 7 opening suction tube 3 over the opening 5 the control disc 4 with the suction chamber of the pump in connection. If one of the short-term sweeping the partitions 6 through the opening 5 the control disc 4 apart, then there is always only one of the chambers 7 with the suction chamber of the pump in connection. This is independent of the at the inlet opening of the suction pipes 3 prevailing respective pressure conditions and independent of the respective aspirated medium ensures safe suction.

By the shown different angular distance of the partitions 6 can the duration of the connection of each chamber 7 be varied with the suction chamber of the pump. In other words, the suction effect of the pump can be on the individual suction tubes 3 be divided differently according to the respective requirements.

1

pump housing

2

pump shaft

3

suction pipes

4

control disc

5

opening

6

partitions

7

chambers

Claims (7)

Oil suction system for an internal combustion engine with a pump whose suction chamber is connected via several suction pipes with different suction points, wherein the suction pipes valves are associated, characterized in that the valves ( 4 - 7 ) are controllable such that each of them is opened in a certain order, while at the same time all other valves are closed. Ölabsaugsystem according to claim 1, characterized in that the valves electrically, mechanically or hydraulically actuated are. Ölabsaugsystem according to claim 2, characterized in that the valves are externally controllable. Oil suction system according to claim 2, characterized in that the suction chamber via a rotationally drivable perforated control disc ( 4 ) with the individual suction tubes ( 3 ) is connectable. Oil suction system according to claim 4, characterized in that the control disk ( 4 ) in a cylindrical housing ( 1 ) is arranged, which limits the suction chamber and in the end wall of the suction tubes ( 3 ), the space between the control disk ( 4 ) and the end wall by a plurality of radial partitions ( 6 ) into individual chambers ( 7 ) is divided. Oil suction system according to claim 5, characterized in that the radial partitions ( 6 ) include a different angle. Oil suction system according to claim 5 or 6, characterized in that the control disk ( 4 ) with the pump shaft ( 2 ) connected is.