JP2001020712A - Pump housing for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump housing with a simple structure. SOLUTION: This pump housing 10 to be mounted on an engine block in an internal combustion engine has a main unit 11 comprising a groove 22 for a coolant pump 16, a passage for coolant between an inlet 28 and outlets 36, 38 with respect to the coolant pump 16, a groove 56 for a lubricant pump 20, and a passage for lubricant between an inlet 60 and outlet 62 with respect to the lubricant pump 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a housing for a pump for an internal combustion engine, such as a coolant and / or lubricant pump.

[0002]

BACKGROUND OF THE INVENTION Various types of pump housings have been provided for coolant pumps and lubricant pumps, and it is an object of the present invention to improve upon these known pump housings. It is in. Accordingly, one object of the present invention is to provide a pump housing that is easy to assemble and / or attach to an engine block. It is another object of the present invention to provide a coolant pump assembly or a lubricant pump assembly that requires less overall components and provides good protection against external leakage from the engine block. It is yet another object of the present invention to facilitate the design of the engine block by the user by providing a simple pump housing. It is yet another object of the present invention to reduce power consumption by the lubricant pump and / or provide for cooling of the lubricant within the pump housing. Yet another object is to provide cooling of the lubricant utilizing at least a portion of the coolant flow from the coolant pump in a simple coolant pump housing.

[0003]

Accordingly, in a first aspect of the present invention, there is provided a pump housing mounted on an engine block of an internal combustion engine, comprising a groove for a coolant pump, and an inlet for the coolant pump. A passage for flowing coolant between the outlet and a groove for a lubricant pump,
A pump housing is provided having an integral body with a passage for flowing lubricant between an inlet and an outlet of a lubricant pump.

[0004] The pump housing preferably further comprises a heat exchanger for the lubricant. Preferably, the heat exchanger is a cooler such as a fin-plate cooler cooled by a coolant delivered by a coolant pump. The passage for the coolant pump preferably allows the flow of coolant to the heat exchanger.

[0005] In a preferred form, two or more separate passages are provided in the pump housing for the coolant. In one embodiment, two outlets are provided so that the coolant sent from the coolant pump is directed in two different directions. Preferably, one of these outlets allows coolant to flow to the heat exchanger.

The pump housing preferably has a lubricant pressure relief valve and a communication passage which permits the recirculation of lubricant returning from the relief valve to the lubricant pump.

In another aspect of the invention, a pump housing for a coolant pump has a body, the body defining a groove for the coolant pump, and coolant is provided in the housing. A pump housing is provided that defines two separate passages from or to the coolant pump to allow separate flow therethrough in two different paths. Preferably, two outlets from the coolant pump are provided.

In a further aspect of the invention, there is provided a pump housing having one or more of the features set forth in the description of the preferred embodiments.

In another aspect of the present invention, there is provided a pump housing mounted on an engine block of an internal combustion engine, the pump housing having an integral lubricant filtration system. The lubricant filtration system has a filter housing integrally mounted within the pump housing and inlet and outlet passages for directing lubricant into the filter housing. Further, the pump housing may have one or more of the features described in connection with other aspects of the invention, or one or more of the features described in the description of the preferred embodiments. It is a pump housing.

[0010] The present invention provides a dual component design in which the components are integrated into a single housing. For this reason, the design efficiency especially regarding the merging requirement for the engine is improved. This is because the flow through a single housing can be set more precisely. In particular, the losses caused by intermediate or secondary connections are reduced, and the compact design further reduces the losses caused by the piping connections. The reduced number of connections and interfaces between components also offers the advantage of minimizing functional degradation. That is, the system of the present invention advantageously reduces the number of parts in the housing as compared to the prior art, thereby simplifying installation on the engine. Further, the integrity of the housing can provide a single part of a larger size than known individual parts, thereby ideally improving toughness and reducing harmonics in the product during use, System resonance can be minimized and noise generation can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings. Note that the descriptions in the following examples are for illustrative purposes only.

Referring to the drawings, there is shown a pump housing 10 according to the present invention. The pump housing 10 has a unitary body 11 having an outer surface 12 and an inner surface 14 or contact surface for attachment to the engine block that fits into the engine block. The pump housing 10 has a coolant pump 16 for water and other coolants, a cooler 18 for lubricant such as lubricating oil, and a lubricant pump 20. Also, the pump housing 10 is mounted on the engine block around the crankshaft and has a hole 13 defined by a rim 15 supporting a crankshaft seal. The pump housing 10 has, for example, a lower surface 17 for abutment with an oil sump casing, and bolts 19 for attaching an idler pulley if necessary.
And further.

Referring to FIG. 1 in more detail, there is shown a groove 22 which forms part of the coolant pump 16. The coolant pump 16 further has a center hole 24 for a drive shaft, preferably with integral bearings, from a pulley 25 (see FIGS. 2 and 4) and a pump rotor with, for example, radial impeller blades ( Groove 2 for not shown)
6 are formed. An inlet 28 is provided for a coolant, such as water, to enter the pump housing 10, from which coolant enters the coolant pump 16 via an opening 30 adjacent to a groove 26 for the pump rotor. Has become. The coolant is impelled from the opening 30 by the impeller blades of the pump rotor through the first and second radially outer swirl portions 32.
And forcibly outwardly to the first and second outlets 36 at the ends of these swirl portions 32 and 34
And 38 respectively.

The outlet 36 is directly connected to an inlet hole in the engine block so that the coolant can circulate in the engine block.

However, the outlet 38 communicates with a passage 40, or tube, which forms part of the coolant passage, which is connected to a molded cover plate 42, which cooperates with one another. It is attached to the main body 11 of the pump housing 10 by a flange. The flow of the coolant is directed by the cover plate 42 in the direction of the arrow W, which is directed towards a part of the coolant flow path in the form of a cylindrical part 44 for receiving a lubricant, as will be described below. Coolant, such as water, flows therefrom in the direction of arrow W toward the second molded cover plate 46, which directs the coolant back into the body 11 via the passage 48. . The passage 48 has a cylindrical portion and a hole formed in the main body 11, through which the passage 48 is connected to the outlet 5.
Connected to 0. And again, the coolant
0 to the opening of the engine block.

That is, there is a double spiral part by two spiral parts 34 and 32, and one spiral part 3
2 diverges the flow via outlet 36 to the engine block. The other swirl 34 also allows the flow through a tube or passage 40 to the cylindrical portion 4 of the cooler.
4 and then enters the engine block from the outlet 50 and merges with the flow from the orifice or outlet 36.

Preferably, the pressures at outlet 50 and outlet 36 are approximately equal. This can be achieved by utilizing different swirl (helix) angles and hole diameters, thereby providing different flow rates and compensating for the pressure loss experienced by fluids passing through different paths.

Advantageously, outlet 50 and outlet 36 are in close proximity to one another so that separate flow paths can be connected back in the engine to a single flow path through the engine block and the radiator and Can be finally returned to the inlet 28 of the pump housing 10.

A heat exchanger (not shown) is preferably provided for the lubricating oil or lubricant in pump housing 10. In a preferred form, a fin-plate cooler is provided within the cylindrical portion 44 and connected to the lubricant inlet 52 and outlet 54, through the coolant cylindrical portion 44 and to the fin-plate cooler. The lubricant flowing through the cooler is cooled by the flow in the direction of arrow W passing through. The cylindrical portion 44 is partially defined by a wall, which defines a chamber in which lubricating oil or lubricant is supplied from the engine block via its inlet 52 with the pump housing 10 attached to the engine block. . An outlet 54 is formed in this wall between the cylindrical part 44 and the room. Lubricating oil or lubricant from outlet 54 can be returned into the engine block. However, the inlet 52 and the outlet 54 may be directly connected to the lubricant pump 20.

Turning now to the lubricant pump 20, a pump (not shown) such as a rotor pump driven by a drive shaft (not shown) disposed in a groove 58, as shown in FIG. Room for ditch 5
6 are provided. The lubricant pump 20 has an inlet 60 that is aligned with an inlet provided in the engine block or an inlet pipe from, for example, a pump on the engine block for supplying lubricant to the lubricant pump 20. Is preferred. Then, the lubricant is returned to the engine block through the outlet 62. FIG. 2, FIG. 4 and FIG.
As shown in FIG.
Is surrounded by Further, another inlet 64 is provided so that the lubricant from the pressure relief valve 66 can be recirculated. The supply to the relief valve 66 is performed, for example, directly from the lubricant passage portion in the engine block which is in fluid contact with the chamber 65 in the housing body 11.

FIG. 6 shows a pump housing 110 according to a second embodiment of the present invention.
It is basically the same as the pump housing 10 of the embodiment. Accordingly, similar members are provided with the same two-digit reference numerals prefixed with the numeral 1. The pump housing 110 has a coolant inlet 128 leading to a coolant pump 116, the coolant pump 116 having a rotor 123 with impeller vanes, and when the rotor 123 is rotated by the rotation of the pulley 125, the impeller blades Coolant is sent. An idler pulley 127 is further provided near the pulley 125 (if necessary). The coolant pump 116 is provided with a series of projections 119 having holes for facilitating attachment of the pump housing 110 to the engine block.

FIGS. 7, 8 and 9 show a modified pump housing 10 having a lubricant filtration system 80, which has a filter housing 82 with a cap 84. FIG. The cap 84 can be attached to the top of the cylindrical housing 82, for example, by screwing, so that the cylindrical filter cartridge can be installed in the filter housing 82. The filtration system 80 has a lubricant inlet hole 86 that can face a passage from the engine block. The inlet hole 86 is surrounded by a seal such as, for example, an O-ring seal 88 which is attached to an annular flange surface surrounding the inlet hole 86. Inside the filter housing 82, an annular outlet flange 90 projects upward in a space for accommodating the cartridge filter. At the upper end of the outlet flange 90, a seal 92 is provided for preventing the flow between the unfiltered lubricant flowing in and the filtered lubricant flowing out. The outlet flange 90 has an outlet hole and a passage 96 which leads to a lubricant cooler 98, such as a cylindrical cooler or a fin plate cooler as described above. .

Alternatively, the filtration system 80 forms part of an engine casing or engine block,
It is configured with suitable inlet and outlet holes for communication with the pump housing.

[Brief description of the drawings]

FIG. 1 is a rear view of a pump housing according to the present invention.

FIG. 2 is a front view of the pump housing of FIG. 1;

FIG. 3 is a right side view of the pump housing of FIG. 1;

FIG. 4 is a perspective view from the front side of the pump housing of FIGS. 1, 2 and 3;

5 is a perspective view of an integral body forming the pump housing shown in FIG.

FIG. 6 is an exploded perspective view of a pump housing according to another embodiment of the present invention.

FIG. 7 is a schematic front view of a pump housing according to the present invention having a lubricant filtration system.

FIG. 8 is a schematic sectional view of the filter housing shown in FIG. 7;

FIG. 9 with the filter housing shown in FIG. 8;
FIG. 2 is a schematic side view of the pump housing of FIG.

DESCRIPTION OF SYMBOLS 10,110 Pump housing 11 Main body 16,116 Coolant pump 18 Cooler 20 Lubricant pump 22 Groove 28,128 Inlet 30 Opening 36,38 Exit 40 Passage 44 Cylindrical part 48 Passage 50 Exit 52 Inlet 54 Exit 56 groove 60,64 inlet 62 outlet 66 pressure relief valve 80 filtration system 82 filter housing 98 cooler

[Procedure amendment]

[Submission date] August 30, 2000 (2008.3.
0)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 4

FIG. 6

FIG. 3

FIG. 5

FIG. 7

FIG. 8

FIG. 9

Claims (14)

[Claims] 1. A pump housing mounted on an engine block of an internal combustion engine, comprising: a groove for a coolant pump; a passage for coolant flow between an inlet and an outlet for the coolant pump; A pump housing having an integral body with a groove for the lubricant pump and a passage for lubricant flow between an inlet and an outlet for the lubricant pump. 2. The pump housing of claim 1, further comprising a heat exchanger for the lubricant. 3. The pump housing according to claim 2, wherein said heat exchanger is a cooler such as a fin plate cooler. 4. The pump housing of claim 3, wherein said heat exchanger is cooled by a coolant delivered by said coolant pump. 5. The pump housing of claim 4 wherein a passage is provided for said coolant pump to allow coolant to flow through said heat exchanger. 6. The pump housing according to claim 1, wherein the pump housing is provided with two or more separate flow paths for coolant. 7. The pump housing of claim 6, wherein two outlets of said coolant pump are provided to direct coolant in two different directions. 8. The pump housing according to claim 7, wherein one of said two outlets is for flowing a coolant to said heat exchanger. 9. A pressure relief valve for a lubricant, and a communication passage for returning and recirculating the lubricant from the pressure relief valve to the lubricant pump.
8. The pump housing of any one of 8. 10. A pump housing for a coolant, the body forming a groove for the coolant pump and forming two separate passages to or from the coolant pump. A pump housing having a coolant that can flow through the pump housing in two different paths. 11. The pump housing of claim 10 having two outlets from said coolant pump. 12. The pump housing according to claim 1, having an integral lubricant filtration system. 13. A pump housing mounted on an engine block of an internal combustion engine, the pump housing having an integral lubricant filtration system. 14. The system of claim 12, wherein the lubricant filtration system includes a filter housing integrally mounted within the pump housing, and inlet and outlet passages for directing lubricant into the filter housing. 1
3. Pump housing.