DE102010050928B4 - Fluid delivery system and fluid pump module - Google Patents

Abstract

A fluid delivery system, in particular an engine oil circuit (10) of an internal combustion engine (12), in particular of a motor vehicle, under liquid pump module (22) are described. A liquid pump (36) is arranged in a liquid line (19). A resonator (42) with at least one chamber (68, 70, 72, 74, 76, 80) for damping pressure pulsations is connected in the flow direction (32) of the liquid behind the liquid pump (36) to the liquid line (19). The resonator is a series resonator (42), which is connected in series in the liquid line (19) with the liquid pump (36).

Description

Technical area

The invention relates to a fluid delivery system, in particular an engine oil circuit of an internal combustion engine, in particular of a motor vehicle, with a liquid pump, which is arranged in a liquid line, and a resonator with at least one chamber for damping of pressure pulsations, connected in the flow direction of the liquid behind the liquid pump with the liquid line is. Furthermore, the invention relates to a liquid pump module of a liquid delivery system.

State of the art

From the US 2007/0224053 A1 An oil pump is known in which pulsating vibrations due to dynamic pressure at the outlet opening can be damped. The oil pump serves to convey oil from an inlet opening to an outlet opening by means of the rotation of a rotor, which is arranged in a pump housing. A resonator is formed of an introduction path and a chamber. The resonator is connected to an outlet flow channel which communicates with the outlet opening in the flow direction of the flow channel. The task of the chamber is to reduce pulsations of the oil flow through the outlet flow channel. The resonator is designed as a dead end and therefore requires an adjacent to the Auslassströmungskanal additional space. For this purpose, a corresponding housing portion is formed on the outside of a pump housing.

From the US 4 473 043 A a fluid lubrication circuit for an internal combustion engine is known with a device for damping fluid pressure pulsation. The circuit includes a pressure damper between a hydraulic pump and an oil cooler. The pressure damper has spaced openings in the direction of fluid flow and a damping chamber disposed between the openings.

Of the JP H09-257 184 A is a Pulsationsdämpfende line refer, with a plurality of successively arranged in the flow direction chambers of different sizes.

The DE 10 2006 017 694 A1 discloses a resonator for hydraulic lines, which reduces the space required by the resonator is used for damping noise in hydraulic systems in the hydraulic system. The resonator comprises a chamber which is essentially rotationally symmetrical with respect to the flow direction as a resonance chamber.

Of the CH 432 147 A is to take a silencer for hydraulic systems with pump, wherein at least one acted upon by the hydraulic medium, elastically yielding damping member is present, which flows around or flows through the hydraulic medium and has at least one gas chamber.

From the KR 10 2007 0 041 840 A For example, a damper is known for a hydraulic system having a plurality of elastic plates in a housing. The plates mutually have openings in an upper or lower portion, through which the fluid flows.

The invention has for its object to design a liquid delivery system and a liquid pump module of the type mentioned, in which simple and space-saving a resonator for damping pressure pulsations can be realized.

Disclosure of the invention

This object is achieved in that the resonator is a series resonator, which is connected in series in the liquid line with the liquid pump.

According to the invention, therefore, the resonator is realized as a continuous resonator, which is integrated to save space in the liquid line. There is no need for an additional housing section for the resonator, which increases the installation space of the liquid delivery system. The resonator can be realized in a correspondingly shaped section of the liquid line. Alternatively, the resonator can be installed as a modular, separate component in the liquid line or installed between two liquid line sections. With the resonator so-called pressure oscillation resonances, which are generated by increasing pressure pulsation in certain power ranges of the liquid pump by a swelling, cyclic flow, attenuated. In this way, the resulting stressful operating conditions for functional components, in particular filters and / or coolers, which are connected downstream of the liquid pump, prevented. These functional components are protected effectively. By reducing the pressure peaks that occur, the following functional components can be made simpler. The liquid delivery system according to the invention with a liquid pump and a resonator connected in series can be used in particular in an engine oil circuit of an internal combustion engine, in particular of a motor vehicle. The space-saving arrangement can be easily arranged in a limited engine compartment of the motor vehicle. Functional components that need maintenance, in particular oil filter can be arranged easily accessible from the outside in this way.

According to the invention, the resonator in the flow path of the liquid in succession at least two chambers, which are separated from each other by at least one partition, which has at least one passage for liquid. Through the passage openings, the liquid can flow into or out of the chambers. By connecting several chambers in series, the pressure damping can be optimized with regard to the pressure losses when flowing through the resonator.

Advantageously, at least two of the partitions may differ in thickness and / or shape. In this way, the resonator for optimizing the damping of the pressure oscillation resonance with minimal pressure losses in the resonator can be optimally adapted to the flow conditions in the fluid delivery system.

According to the invention, at least two of the passage openings differ in shape and / or diameter. The passage openings may in particular have varying diameters along the extent in the flow direction. In particular, the passage openings may have bottlenecks or widenings. You can also have conical gradients. Due to the different shapes and / or diameters of at least two of the passage openings, which are arranged one behind the other in particular in the flow direction, the damping effect is improved in terms of pressure losses.

In a further advantageous embodiment, at least two of the chambers may differ in shape and / or size. The shape and / or size of at least two chambers can be adapted to optimize damping and pressure losses.

In a further advantageous embodiment, the liquid pump may be a positive displacement pump, in particular an internal gear pump or a vane cell pump. Positive displacement pumps are well suited for pumping liquids, especially oil. They are efficient, space-saving and simply structured.

In a further advantageous embodiment, the liquid pump and the resonator can be integrated in a liquid pump module, in particular a liquid filter module. A liquid pump module with integrated resonator can be prefabricated separately and easily installed in a liquid line. Maintenance and replacement of the module are also easily possible. In addition, a liquid pump module with the corresponding integrated fluid channels can be built to save space. Advantageously, the liquid pump module may be a liquid filter module which, in addition to the liquid pump and the resonator, has a liquid filter or a connection for a liquid filter. When implementing the invention with an oil filter module or an oil pump module of an internal combustion engine, this can be arranged to save space, in particular in an engine compartment.

The object is further achieved according to the invention by the liquid pumping module of a liquid delivery system comprising a module housing having at least one inlet for liquid connectable to an inlet side liquid line section of the liquid delivery system and at least one outlet for liquid connected to a discharge side liquid line section of the liquid delivery system can, in which a liquid pump is arranged, whose inlet communicates with the inlet and its outlet via an outlet channel of the liquid filter module with the outlet, and in the outlet channel, a series resonator is arranged with at least one chamber, which is connected in series with the liquid pump , The features and advantages presented above in connection with the liquid delivery system according to the invention apply correspondingly to the liquid pump module according to the invention and its advantageous embodiments.

In an advantageous embodiment, the liquid pump module may be a liquid filter module in which a liquid filter element is arranged in the outlet channel downstream of the series resonator in the flow direction.

Brief description of the drawings

Further advantages, features and details of the invention will become apparent from the following description in which an embodiment of the invention with reference to the drawings is explained in more detail. The person skilled in the art will expediently also individually consider the features disclosed in the drawing, the description and the claims in combination and combine these into meaningful further combinations. Show it

1 schematically an engine oil circuit of an internal combustion engine of a motor vehicle with an oil filter module, in which an oil pump, a series resonator, an oil cooler and an oil filter are integrated;

2 schematically in section the series resonator from the 1 ,

In the figures, the same components are provided with the same reference numerals.

Embodiment (s) of the invention

In the 1 is a motor oil circuit 10 an internal combustion engine 12 a motor vehicle shown.

The engine oil circuit 10 has an oil pan 14 with an oil sump 16 , From the oil pan 14 leads a first oil line section 18 an oil line 19 to an inlet 20 an oil filter module 22 , The oil filter module 22 can be completely prefabricated and during assembly of the internal combustion engine 12 in the engine oil circuit 10 be used.

From an oil outlet 24 of the oil filter module 22 performs a second oil line section 26 the oil line 19 to lubrication points 28 the internal combustion engine 12 , In the 1 For the sake of clarity, only one of the lubrication points 28 indicated. At the lubrication points 28 it may be in particular bearings and / or other, not of interest here, preferably moving components of the internal combustion engine 12 act.

From the lubrication points 28 leads a third oil line section 30 the oil line 19 back to the oil pan 14 , The second oil line section 26 and the third oil line section 30 are located on the mostly unpressurized or with low pressure of the crankcase acted on side of the engine oil circuit 10 ,

The flow direction of the engine oil in the engine oil circuit 10 is by arrows 32 indicated.

The oil filter module 22 has a module housing 34 in which a positive displacement pump 36 , Preferably, an internal gear pump or a vane pump is arranged. With the positive displacement pump 36 The engine oil is removed from the oil sump 14 to the lubrication points 28 promoted. An inflow 37 the positive displacement pump 36 is via an inlet channel 38 the oil line 19 with the inlet 20 connected.

In the flow direction 32 the engine oil behind the positive displacement pump 36 is a drainage channel 40 the oil line 19 with a drain 41 the positive displacement pump 36 connected. In the drainage channel 40 is a series resonator 42 arranged. The series resonator 42 is after the positive displacement pump 36 in the drainage channel 40 connected in series. The series resonator 42 is in detail also in the 2 and is described in more detail below. The positive displacement pump 36 generates a swelling, cyclic flow which has increased pressure pulsations in certain speed ranges, referred to as pressure swing resonance. With the series resonator 42 these pressure vibration resonances are damped, in particular the pressure peaks are cut off. The series resonator 42 thus serves as a pressure peak damper.

From an exit 44 of the series resonator 42 leads the drainage channel 40 to an input of an oil cooler 46 , In a radiator bypass line 48 to the oil cooler 46 is a radiator bypass valve 50 arranged.

From an outlet of the oil cooler 46 leads a connection channel 52 the oil line 19 to an input of an oil filter 54 , In a filter bypass line 56 to the oil filter 54 is a filter bypass valve 58 arranged.

An outlet channel 60 the oil line 19 leads from an outlet of the oil filter 54 to the oil outlet 24 of the oil filter module 22 ,

From the exit 44 of the series resonator 42 further performs a pressure equalization line 62 in the oil pan 14 , In the pressure compensation line 62 is a pressure control valve 64 arranged. A control line 66 for controlling the pressure regulating valve 64 leads from the second oil line section 26 to the pressure control valve 64 ,

The series resonator 42 points, as in the 2 shown, in the flow direction 32 seven chambers in a row 68 . 70 . 72 . 74 . 76 . 78 and 80 on which flows through the engine oil. The chambers 68 to 80 are each by flat partitions 82 . 84 . 86 . 88 . 90 and 92 separated from each other. Each of the partitions 82 to 92 has a round passage opening 93 . 94 . 96 . 98 . 100 and 102 for the engine oil.

The shapes and dimensions of the chambers 68 to 80 , the partitions 82 to 92 and the passage opening 93 to 102 are optimally adapted to the components and the structure of the oil filter module to optimize the pressure peak attenuation and minimize the pressure losses 22 , in particular the positive displacement pump 36 , the inlet channel 38 , the drainage channel 40 and the module housing 34 , and the capacity in the engine oil circuit 10 customized.

The thicknesses of the partitions 82 and 92 . 86 and 90 and 84 and 88 in the flow direction 32 are identical. The thicknesses of the partitions 82 and 92 in the flow direction 32 are larger than the thicknesses of the partitions 86 and 90 , The thicknesses of the partitions 84 and 88 in the flow direction 32 are smaller than the thicknesses of the partitions 86 and 90 ,

The the passage openings 93 to 102 bounding radially outer circumferential sides are parallel to a virtual axis 104 of the drainage channel 40 ,

The diameters of the passage openings 93 and 102 are identical. Likewise, the diameters of the passage openings 94 . 96 . 98 and 100 identical. The latter amount to about 10 mm. The diameters of the passage openings 93 and 102 are larger than the diameters of the passage openings 94 . 96 . 98 and 100 ,

The chambers 68 to 80 and the passage openings 93 to 102 are coaxial with the axis 104 arranged. Their peripheral walls are parallel to the axis 104 ,

The diameters of the chambers 68 to 80 are identical. The dimensions of the chambers 68 and 76 , the chamber 72 and 78 and the chambers 70 and 80 in the axial direction are identical. The dimensions of the chambers 68 and 76 in the axial direction are smaller than the dimensions of the chambers 72 and 78 , The dimensions of the chambers 70 and 80 in the axial direction are larger than the dimensions of the chambers 72 and 78 , The largest extent in the axial direction, the chamber 74 on.

In all embodiments of an engine oil circuit described above 10 and an oil filter module 22 Among others, the following modifications are possible:
The invention is not limited to a motor oil circuit 10 an internal combustion engine 12 of a motor vehicle. Rather, it can also be used in other types of engine oil circuits, for example in industrial engines. The invention may also be used in other types of liquid handling systems, for example, to convey hydraulic fluid, such as hydraulic oil, brake fluid, gear oil, or water delivery systems.

The partitions 82 to 92 may instead of just different shape, for example, curved, be.

Instead of the seven chambers 68 to 80 may also be provided more or less than seven chambers.

The chambers 68 to 80 and the passage openings 93 to 102 can take place coaxially with the axis 104 also be arranged eccentrically or offset from each other.

The chambers 68 to 80 can also have different diameters.

The peripheral walls of the chambers 68 to 80 can take place parallel to the axis 104 also run obliquely or bent.

The passage openings 93 to 102 Instead of being round, they can also be shaped differently, for example oval or angular.

The the passage openings 93 to 102 limiting perimeter pages can be held parallel to the axis 104 also run diagonally to this. You can also bent, for example, be wavy.

Instead of in the form of an oil filter module 22 can the positive displacement pump 36 and the series resonator 42 spatially separated in a separate pump module, but functionally connected, from the oil cooler 46 and / or the oil filter 54 in the engine oil circuit 10 be arranged. Also, all functional components of the engine oil circuit can be separated from each other in the oil line instead of in modular design 19 be arranged.

Additionally or alternatively to the oil cooler 46 and the oil filter 54 can also other functional components in the engine oil circuit 10 be provided.

The engine oil circuit 10 can also only the positive displacement pump 36 , the series resonator 42 and the lubrication points 28 exhibit.

Instead of a positive displacement pump 36 can also be provided a different type of fluid pump.

The diameters of the passage openings 93 . 96 . 98 and 100 can also be larger or smaller than 10 mm.

Claims (7)

Liquid delivery system with a liquid pump ( 36 ), which are in a fluid line ( 19 ), and a resonator ( 42 ) with at least one chamber ( 68 . 70 . 72 . 74 . 76 . 80 ) for damping pressure pulsations, in the flow direction ( 32 ) of the liquid behind the liquid pump ( 36 ) with the liquid line ( 19 ), wherein the resonator is a series resonator ( 42 ) which is in the liquid line ( 19 ) with the liquid pump ( 36 ) is connected in series and flows through, wherein the series resonator ( 42 ) in the flow path of the liquid one behind the other at least three chambers ( 68 . 70 . 72 . 74 . 76 . 80 ), each through at least one partition ( 82 . 84 . 86 . 88 . 90 . 92 ), the at least one passage opening ( 93 . 94 . 96 . 98 . 100 . 102 ) are separated from each other, the chambers ( 68 . 70 . 72 . 74 . 76 . 80 ) and the passage openings ( 93 . 94 . 96 . 98 . 100 . 102 ) coaxial with an axis ( 104 ) are arranged, characterized in that at least two of the passage openings ( 93 . 94 . 96 . 98 . 100 . 102 ) differ in shape so that they have varying diameters along the dimension in the flow direction. Liquid delivery system according to claim 1, characterized in that at least two of the partitions ( 82 . 84 . 86 . 88 . 90 . 92 ) differ in their thickness and / or shape. Liquid delivery system according to one of claims 1 or 2, characterized in that at least two of the chambers ( 68 . 70 . 72 . 74 . 76 . 80 ) differ in shape and / or size. Liquid delivery system according to one of the preceding claims, characterized in that the liquid pump is a positive displacement pump ( 36 ). Liquid delivery system according to one of the preceding claims, characterized in that the liquid pump ( 36 ) and the resonator ( 42 ) are integrated in a liquid pump module. Liquid pump module ( 22 ) of a liquid delivery system according to one of the preceding claims, with a module housing ( 34 ), which has at least one inlet ( 20 ) for liquid which is connected to an inlet-side liquid line section ( 18 ) of the liquid delivery system ( 10 ) and at least one outlet ( 24 ) for liquid which is connected to a pressure-side liquid line section ( 26 ) of the liquid delivery system ( 10 ), in which a liquid pump ( 36 ) whose inlet ( 37 ) with the inlet ( 20 ) and its course ( 41 ) via an outlet channel ( 40 . 52 . 60 ) of the liquid filter module ( 22 ) with the outlet ( 24 ) and in the exhaust duct ( 40 ) a series resonator ( 42 ) with at least one chamber ( 68 . 70 . 72 . 74 . 76 . 80 ) arranged with the liquid pump ( 36 ) is connected in series. Liquid pump module according to claim 6, characterized in that it comprises a liquid filter module ( 22 ) in which in the outlet channel ( 40 . 52 . 60 ) in the flow direction ( 32 ) behind the series resonator ( 42 ) a liquid filter element ( 54 ) is arranged.

Images