SI22915A - Bracket of high-pressure pump for internal combustion engines - Google Patents

Abstract

On the bracket of the high-pressure motor pump with internal combustion a nest (5) for the receipt of complementary parts is designed in such a way that the recess (50) - looking in the direction of depth - runs perpendicularly regarding the wall (20) surface (1) of the bracket, while in the recess (50) of the nest (5) there is a positioning rib (54) directly located next to the aforementioned opening (53) between the walls (51, 52), anticipated for creating a bedding for the positioning bushing during installation. Further, there are two additional ribs (26, 27) anticipated on the circumference of the wall where the reinforcement rib (25) is running, which are running approximately perpendicularly one against the other, in fact the first rib (26) runs in the tangential direction regarding the specified central opening (200) in the wall (20) and approximately in the vertical direction, while the remaining rib (27) is located beneath the specified opening (200) and at a certain distance from the latter while running at least approximately horizontal. At the same time differently from the mechanically processed lower sides (32, 42) the upper surfaces (31, 41) of the fixing ears (3, 4) are mechanically not processed. Such a bracket (1) can be manufactured with the help of simple and low-cost casting tools or moulding in the technological process of classical pressure casting of aluminium or any corresponding aluminium alloy, while its static firmness is substantially enhanced.

Description

High-pressure pump mount for internal combustion engine

The present invention in the field of mechanical engineering falls within the field of internal combustion engines, namely the structural details of them, their components and their accessories.

The invention is based on the problem of how to simplify the carrier of a pressure pump in an internal combustion engine compared to the known carrier so far that it can be manufactured using as simple and inexpensive casting tools as possible. molding in the process of classic aluminum die-casting or the corresponding aluminum alloy, with static stiffness corresponding to the rigidity of the product known so far, and lasting dynamic strength to be further improved.

The high-pressure pump carrier of the internal combustion engine, known at the time for the engines of the French manufacturer PSA (Peugeot Citroen Automobiles SA), is known and is therefore accessible to the public in commercial use, while it has not been identifiable as such in the patent literature. .

For this reason, and at the same time for the sake of readability of the description of the proposed solution, the known carrier is particularly illustrated in the accompanying drawing (Fig. 1), which will help to explain the design of the known carrier, including its disadvantages.

The known bracket Γ comprises a flange region 2 ′ formed by a wall 20 ′ with a central hole 200 ′ for passage of a non-shown pump shaft, and at the same time a wall 20 ′ around said hole 200 ′ is provided with sockets 2Γ, 22 ′, 23 ′, 24 ′. , each comprising at least one through hole 210 ', 220', 230 ', 240', and which are suitably machined and adapted to fit the pump housing not shown on said bracket Γ. Said wall 20 of the 'flange area 2' is reinforced by the circumferential rib 25 ', and at the same time by a pair of transverse ribs 26', 27 'extending tangentially to said central hole 200' due to the required rigidity of the support 1 'in the mounting area of the pump housing. . The purpose of said ribs 25 ', 26', 27' is to provide the necessary rigidity of the carrier 1 against a relatively thin wall 20 'and at the same time its rigidity in terms of its ability to withstand the permanent dynamic loads that it is subjected to during use.

Further, the known carrier 1 'is provided with fixing ears 3', 4 ', located in its lower region and extending in a plane perpendicular to the plane of the wall 20. Said ears 3', 4 'project each on its side said walls 20 ' and are provided for attaching the carrier 1 ' to each substrate, namely to a suitable bearing either on the hood or engine mount or at another suitable location in the vehicle. Each of said ears 3 ', 4' comprises at least one hole 30 ', 40' as well as the treated contact surface 3Γ, 32 '; 4Γ, 42 '. The lower surfaces 32 ', 42' serve to accurately and evenly attach the carrier 1 'to the surface available in each case, and the opposite upper surface 31', 41 'to support the elements of the unscrewed screw connection by which the carrier 1' is secured to the substrate. . In this respect, it has been found that the treatment of said contact surfaces 3Γ, 32 '; 41 ', 42', and in particular of the upper contact surfaces 3 ', 41' at the passage to the wall 20 ', interrupt the continuity of the surface layer of the casting of the carrier 1', which significantly increases the exposure to the so-called notch effect, especially in the case of permanent dynamic loads initially lead to cracks and later to fracture. The carrier 1 'is further provided with a socket 5' to receive the unpowered catfish of the position bushing. Said socket 5 'is designed as a recess 50' and, in the example shown, when viewed in depth, runs parallel to the plane of the wall 20 'of the carrier 1' and comprises, in parallel, the upper wall 51 'and the lower wall 52' spaced parallel to each other. through hole 53 '. The installation of the som and the associated bushing into said hole 53 'between said walls 5Γ, 52' is extremely complicated, since the sleeve without any backrest often falls out of the area of said recess 50 '. On top of this, this type of socket construction 5 'with respect to the position of the recess 50' during the construction of the carrier 1 'in the process of injection molding results in the inevitable use of the side core or. the slider, which must be movable in the direction of arrow A. in FIG. 1. In addition, two additional lateral cores are required, one of which is movable in the direction of arrow B to make the recess 50 ', and further, for the purpose of manufacturing at least approximately in the plane of the wall 20' of the running hole 6 ', the intended core is in the direction of arrow C according to FIG. 1.

From the foregoing, it would therefore be reasonable to remedy the aforementioned deficiencies in the carrier 1 'with an appropriately simplified design while maintaining static rigidity and increasing resistance to permanent dynamic loads while simultaneously simplifying the mold, which, despite these technical improvements, could significantly reduce production costs.

The subject carrier of a high-pressure pump in an internal combustion engine is preferably also feasible by the technology of die-casting of aluminum or other suitable aluminum-based alloy into at least a two-piece mold and comprising

- a flange area formed by a wall provided with a central hole with preferentially mechanically treated grooves arranged in each appropriate manner around said hole, each of which comprises at least one through hole, and further provided on said wall also reinforcing ribs, one rib of which extends approximately around the perimeter of the wall as well

- at least two fixing ears arranged in the lower region of the support and in a plane perpendicular to the plane of the wall and projecting each on each side of said wall, each of said ears having at least one hole and a lower contact surface adapted for the exact support of the carrier itself on each base, and the upper contact surface, which is located at the passage to the wall, and is intended to fit the elements of the screw connection to secure the carrier to the substrate, and

- at least one socket for receiving complementary elements, in particular the positional bush socket available at each time, which is available as a recess which, when viewed in depth, runs perpendicular to the plane of the carrier wall and comprises a spaced upper wall and a lower wall in parallel , through which there is a hole.

According to the invention, said socket is designed so that the recess of the socket - viewed in the direction of depth - extends in a direction perpendicular to the plane of the carrier wall, and in the very recess of the socket a positioning rib is provided between said walls between the walls to position installation. Further, in addition to the substantially circumferential wall of the extending reinforcement rib, two reinforcement ribs extending at least approximately perpendicularly to each other are provided, the first rib extending tangentially to said central hole in the wall and approximately vertically, and the remaining rib disposed below said hole and at a distance from the latter, and extending at least approximately in the horizontal direction, preferably in the plane of the fixing ears, the upper surfaces of which, unlike the machined lower surfaces, are mechanically untreated.

The invention will now be described in more detail on the basis of the accompanying drawing, in which Figs. 1 is an perspective perspective view of an existing high-pressure pump carrier for an internal combustion engine;

FIG. 2 is a perspective view of a high-pressure pump carrier designed in accordance with the proposed solution in perspective;

FIG. 3 is a carrier according to FIG. 2, also in perspective, but from the opposite side;

FIG. 4 is an orthogonal view according to FIG. 3;

FIG. 5 is a cross-sectional view in the plane V - V according to FIG. 4

The present carrier 1 according to the invention is designed so that it can be made by the technology of die-casting of aluminum or other suitable aluminum-based alloy into a simple two-piece mold without sliders or side cores.

The carrier 1 according to the invention shown in FIG. 2-5, similar to the known carrier according to FIG. 1 comprises a flange region 2 formed by a wall 20 with a central hole 200 for passage of a non-shown pump shaft. The wall 20 is provided with sockets 21, 22, 23, 24, which are each suitably arranged around said hole 200, each comprising at least one through hole 210, 220, 230, 240. The posts 21, 22, 23 are respectively machined and modified to fit the pump housing not shown on said carrier 1.

Said wall 20 of flange area 2 is reinforced by the circumferential rib 25 due to the necessary rigidity of the support 1 in the region of attachment of the pump housing, and at the same time by additional ribs 26, 27 extending at least about orthogonal to each other, namely rib 26 tangentially relative to said central hole 200 and approximately in the vertical direction, and the rib 27 is disposed below said hole 200 and at a distance from the latter and extends at least approximately in the horizontal direction. The aforementioned ribs 25, 26, 27 are intended, despite the relatively thin wall 20, to provide the necessary rigidity of the carrier 1 and also its strength in terms of its ability to withstand the permanent dynamic loads that it is exposed to during use.

The carrier 1 is further provided with mounting ears 3, 4, which are located in the lower area and in a plane perpendicular to the plane of the wall 20 and project each on its side of said wall 20, and are provided for attaching the carrier 1 itself to in each case, namely on a suitable base on the engine housing or other suitable location in the vehicle. To this end, each of said ears 3, 4 comprises at least one hole 30, 40 and a contact surface 31, 32; 41, 42, namely, the lower contact surface 32, 42 adapted to accurately align the carrier 1 itself on each base, and the upper contact surface 31, 41 located at the passage to the wall 20 and which is provided to fit the elements of the screw connection for fastening of carrier 1 to the substrate. According to the invention, it is envisaged that the lower surfaces 32, 42 are subsequently machined, while the early surfaces 31, 41 remain untreated, eliminating the aforementioned notch problem, thereby significantly increasing the permanent dynamic strength of the support 1.

Further, in this case, the carrier 1 is also provided with a socket 5 for receiving the unpowered somersault of the position bushing. The socket 5 is designed as a recess 50, but in this case, when viewed in the depth direction, it extends perpendicular to the plane of the wall 20 of the carrier 1 and comprises, in parallel, the upper wall 51 and the lower wall 52 spaced parallel to each other, through which a hole 53 extends. Due to the installation of the som and the associated bushing into said hole 53, a positioned rib 54 (Fig. 5) is provided between said walls 51, 52, which extends approximately to said hole 53 and whose sole purpose is to form a support for said positioned bushing during installation.

Thanks to the rotation of the socket 5 into a plane perpendicular to the wall 20, it is therefore possible to make the carrier 1 using a simple mold, which enables, among other things, the casting of several products simultaneously and thus significantly increases the economical production. Thanks to the ribs 25, 26, 27, the rigidity is greater than the stiffness of the known supports so far, and at the same time it is possible to realize said rib 54 easily, thus eliminating the problems of mounting the complementary parts, thanks to the expedient implementation of the surfaces 31, 41 on the mounting ears 3, 4 also increases the permanent dynamic strength of the carrier thus obtained 1.

Claims (2)

PATENT APPLICATIONS 1. A high-pressure pump carrier for an internal combustion engine, preferably feasible by the technology of die-casting of aluminum or other suitable aluminum-based alloy into at least a two-piece mold, comprising - a flange region (2) formed by a wall (20) provided with a central hole (200) with preferably mechanically machined grooves (21, 22, 23, 24) arranged in each appropriate manner around said hole (200), each comprising at least one through hole (210, 220, 230, 240), and on said wall (20), reinforcing ribs (25, 26, 27) are provided, of which one rib (25) extends approximately along the perimeter of the wall (20) as well - at least two fastening ears (3, 4) arranged in the lower region of the support (1) and in a plane perpendicular to the plane of the wall (20) and projecting to each side of said wall (20), said ears (3, 4) comprising at least one hole (30, 40) and a lower contact surface (32, 42) adapted to accurately fit the carrier (1) on each base, and an upper contact surface (31, 41) which is located at the passage into the wall (20) and is intended to support the screw connection elements for attaching the support (1) to the substrate, and - at least one nest (5) for receiving each complementary part, in particular the positioning bushing bolt, which is available as a recess (50), which - viewed in the depth direction - extends in a direction perpendicular to the plane of the wall (20) of the carrier 1 and comprising, in parallel, the upper wall (51) and the lower wall (52) spaced parallel to each other, through which a hole (53) extends, characterized in that said nest (5) is so designed that the recess (50) is viewed in the direction of deep - runs in a direction perpendicular to the plane of the wall (20) of the carrier (1), and in the very recess (50) of the socket (5), a positioning rib (5) is provided directly next to said hole (53) between said walls (51, 52). 54) for forming the backing of the positioning sleeve during installation, in addition to substantially two further reinforcing ribs (26, 27) extending at least approximately orthogonal to each other, substantially along the circumference of the wall (20) of the extending reinforcing rib (25). the first rib (26) extends tangentially to said central hole (2) 00) in the wall (20) and approximately in the vertical direction, and the remaining rib (27) is disposed below said hole (200) and at a distance from the latter and extends at least approximately in the horizontal direction, while at the same time unlike mechanically machined lower surfaces (32, 42) The upper surface (31, 41) of the mounting ears (3, 4) is mechanically untreated. Bracket according to claim 1, characterized in that the rib (27) extends in the plane of the mounting ears (3, 4).