Novel compact high-pressure oil pump seat assembly

Abstract

The invention discloses a novel compact high-pressure oil pump seat assembly and relates to the technical field of engine research and development. The vacuum pump base and the high-pressure oil pump base are arranged on the two sides in the length direction, a high-pressure oil pump installation flange is arranged at the top end of the high-pressure oil pump base, and the occupied space in the axial width direction is compressed through deflection adjustment. The housing sealing flange belt and the cylinder cover sealing flange belt are arranged at the two ends in the axial width direction, an overlapping area exists between the housing sealing flange belt and the high-pressure oil pump mounting flange, and the rear blanking cap mounting hole is formed in the position, close to a high-pressure oil pump base, of the edge, so that the axial rear end of the high-pressure oil pump base assembly forms an open structure and is plugged through an independent blanking cap. And a processing cam shaft accommodating cavity is reserved in the rear blanking cap mounting hole. On the premise that functionality is guaranteed, the axial structure width of the high-pressure oil pump seat assembly can be obviously compressed, it is guaranteed that the outer contour of the whole machine is designed compactly, and the adaptability of a cabin of the whole machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engine research and development, and in particular to a novel compact high-pressure oil pump seat assembly. Background Art

[0002] Currently, direct injection technology has been added to automobile engines, which has put forward new requirements for the installation and fixation of high-pressure oil pumps, which also requires sufficient installation space.

[0003] The high-pressure oil pump seat assembly serves as the mounting base for the high-pressure oil pump. Its structural size is limited by the space of the cylinder head peripheral components. Therefore, if the axial width of the high-pressure oil pump seat assembly cannot be effectively compressed, the cylinder head will inevitably need to be longer to meet the installation and fixation requirements of the high-pressure oil pump, which is not conducive to the space utilization of the engine.

[0004] Therefore, it is urgent to optimize the structure of the high-pressure oil pump seat assembly by compressing the axial width of the camshaft of the high-pressure oil pump base to meet the axial compression of the cylinder head as much as possible under the premise of the high-pressure oil pump installation requirements. Summary of the Invention

[0005] In order to address the shortcomings of the background technology, the present invention provides a new compact high-pressure oil pump seat assembly, which helps to significantly compress the axial structural width of the high-pressure oil pump seat assembly while ensuring functionality, ensures the compact design of the entire machine's outer contour, and improves the adaptability of the entire machine's cabin.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a novel compact high-pressure oil pump seat assembly, comprising a vacuum pump base, a high-pressure oil pump base, a cam sensor base, a cover sealing flange, a cylinder head sealing flange, and a rear plug cover mounting hole; The vacuum pump base and the high-pressure oil pump base are respectively arranged on both sides of the length direction of the high-pressure oil pump base assembly. A high-pressure oil pump mounting flange is integrally provided at the top of the outer wall of the hole of the high-pressure oil pump base. The high-pressure oil pump mounting flange is adjusted to reduce the occupied space in the axial width direction by deflection. The convex position sensor base is arranged in the middle position of the vacuum pump base side, the cover sealing flange belt and the cylinder head sealing flange belt are respectively arranged at both ends of the high-pressure oil pump seat assembly in the axial width direction, and the cover sealing flange belt and the high-pressure oil pump mounting flange have an overlapping area in the axial width direction; The rear plug cover mounting hole is arranged at a hole position adjacent to the high-pressure oil pump base on the edge of the high-pressure oil pump seat assembly, so that the axial rear end of the high-pressure oil pump seat assembly forms an open structure and is sealed by an independent plug cover, and a camshaft accommodating cavity is reserved inside the rear plug cover mounting hole.

[0007] Furthermore, the vacuum pump base, the high-pressure oil pump base, the cam sensor base, the cover sealing flange, the cylinder head sealing flange and the rear plug cover mounting hole are integrally formed using a casting process.

[0008] Furthermore, the high-pressure oil pump mounting flange is provided with two threaded holes, the two threaded holes are symmetrically arranged along the hole center of the high-pressure oil pump base, and the angle α between the center connecting line of the two threaded holes and the axial direction is ≥75 degrees.

[0009] Furthermore, the width of the overlapping area between the cover sealing flange and the high-pressure oil pump mounting flange is greater than 5 mm.

[0010] Compared with the prior art, the beneficial effects of the present invention are: under the premise of ensuring the functionality of the high-pressure oil pump seat assembly, the present invention realizes axial compression by deflecting and adjusting the high-pressure oil pump mounting flange, and adjusts the position of the cover sealing flange to be as close as possible to the outer wall of the hole of the high-pressure oil pump base. At the same time, the rear end is designed to be an open structure, and there is no need to reserve avoidance space for the camshaft hole machining tool, but it is sealed by an independent plug cover. Through these three adjustment methods, the axial structural width of the high-pressure oil pump seat assembly is optimized, so that the rear end length of the cylinder head in the engine assembly does not need to be excessively increased to meet the installation requirements of the high-pressure oil pump and vacuum pump, which helps to reduce the outer contour of the whole machine to achieve a compact design and improve the adaptability of the whole machine cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 1 is a schematic top view of the high-pressure oil pump seat assembly of the present invention; Figure 2 It is a schematic diagram of the structure of the high-pressure oil pump seat assembly as viewed from above.

[0012] In the figure: 1. Vacuum pump base; 2. High-pressure oil pump mounting flange; 3. Cam sensor base; 4. Cover sealing flange; 5. Cylinder head sealing flange; 6. Rear plug mounting hole; 7. Camshaft accommodating chamber. DETAILED DESCRIPTION

[0013] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0014] like Figure 1~Figure 2 As shown, a new compact high-pressure oil pump seat assembly includes a vacuum pump base 1, a high-pressure oil pump mounting flange 2, a cam sensor base 3, a housing sealing flange 4, a cylinder head sealing flange 5, a rear plug cover mounting hole 6, and a camshaft accommodating cavity 7, all of which are integrally formed using a casting process. The vacuum pump base 1 and the high-pressure oil pump base are respectively arranged on both sides of the length direction of the high-pressure oil pump seat assembly. The high-pressure oil pump mounting flange 2 is integrally arranged at the top of the outer wall of the hole of the high-pressure oil pump base. The high-pressure oil pump mounting flange 2 is provided with two threaded holes, and the two threaded holes are symmetrically arranged along the center of the hole of the high-pressure oil pump base. The convex position sensor base 3 is arranged in the middle position of the vacuum pump base 1.

[0015] In addition, the cover sealing flange band 4 and the cylinder head sealing flange band 5 are respectively provided at both ends of the high-pressure oil pump seat assembly in the axial width direction, so that the high-pressure oil pump seat assembly participates in the sealing between the valve chamber cover and the cylinder head.

[0016] There are three structures that affect the axial width of the high-pressure oil pump seat assembly, namely the high-pressure oil pump mounting flange 2, the cover sealing flange 4, and the avoidance space for the camshaft hole processing tool. In order to achieve the control of the axial width of the high-pressure oil pump seat assembly, the high-pressure oil pump mounting flange 2 is deflected and adjusted. The present invention makes the angle α between the center connection line of the two threaded holes of the high-pressure oil pump mounting flange 2 and the axial direction ≥75 degrees, thereby compressing the space occupied by the high-pressure oil pump mounting flange 2 in the axial width direction. Secondly, the cover sealing flange 4 is required to be as close as possible to the outer wall of the hole position of the high-pressure oil pump base. The present invention makes the cover sealing flange 4 and the high-pressure oil pump mounting flange 2 overlap in the axial width direction, and the width of the overlapping area is greater than 5mm. In addition, the present invention designs the axial rear end of the high-pressure oil pump seat assembly as an open structure, eliminating the need for clearance for tooling in the camshaft hole. Instead, a rear plug cover mounting hole 6 is provided at the edge of the high-pressure oil pump seat assembly, adjacent to the hole in the high-pressure oil pump base. A camshaft accommodating cavity 7 required for the camshaft is reserved within the rear plug cover mounting hole 6. This rear plug cover mounting hole 6 is sealed by an independent plug cover, thus resolving the need for increased axial width at the rear end of the cylinder head to accommodate tooling. Through the optimized design of these three structures, the maximum axial width of the high-pressure oil pump seat assembly can be controlled to 91.5mm.

[0017] During the development of our N-series engines, the rear end of the cylinder head assembly required axial compression. Using this solution, by adjusting the coaxial angle of the high-pressure oil pump mounting flange 2 from 0 degrees to 75 degrees, the axial distance occupied by the flange was compressed from 91mm to 55mm. The cover sealing flange 4 overlapped with the high-pressure oil pump mounting flange 2, with an axial distance of 5.2mm in the overlapped area, further achieving axial compression. Furthermore, the rear end of the camshaft bore is open, eliminating the need for machining tool clearance and using a separate plug for sealing. This achieves an additional 30mm of axial compression, theoretically 35.2mm. The high-pressure oil pump base assembly also integrates the vacuum pump base 1 and the cam position sensor base 3.

[0018] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0019] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new compact high-pressure oil pump seat assembly, characterized by: It includes a vacuum pump base (1), a high-pressure oil pump base, a convex position sensor base (3), a housing sealing flange (4), a cylinder head sealing flange (5), and a rear plug cover mounting hole (6); The vacuum pump base (1) and the high-pressure oil pump base are respectively arranged on both sides of the length direction of the high-pressure oil pump base assembly, and a high-pressure oil pump mounting flange (2) is integrally provided at the top of the outer wall of the hole of the high-pressure oil pump base. The high-pressure oil pump mounting flange (2) is compressed in the axial width direction by deflection adjustment. The convex position sensor base (3) is arranged at the middle position of the vacuum pump base (1), the housing sealing flange (4) and the cylinder head sealing flange (5) are respectively arranged at both ends of the high-pressure oil pump seat assembly in the axial width direction, and the housing sealing flange (4) and the high-pressure oil pump mounting flange (2) have an overlapping area in the axial width direction; The rear plug cover mounting hole (6) is arranged at a hole position adjacent to the high-pressure oil pump base at the edge of the high-pressure oil pump seat assembly, so that the axial rear end of the high-pressure oil pump seat assembly forms an open structure and is sealed by an independent plug cover, and a camshaft accommodating cavity (7) is reserved inside the rear plug cover mounting hole (6).

2. A novel compact high-pressure oil pump seat assembly according to claim 1, characterized in that: The vacuum pump base (1), the high-pressure oil pump base, the convex position sensor base (3), the housing sealing flange (4), the cylinder head sealing flange (5), and the rear plug cover mounting hole (6) are integrally formed using a casting process.

3. A novel compact high-pressure oil pump seat assembly according to claim 1 or 2, characterized in that: The high-pressure oil pump mounting flange (2) is provided with two threaded holes, the two threaded holes are symmetrically arranged along the hole center of the high-pressure oil pump base, and the angle α between the center connecting line of the two threaded holes and the axial direction is ≥75 degrees.

4. A novel compact high-pressure oil pump seat assembly according to claim 3, characterized in that: The width of the overlapping area between the housing sealing flange band (4) and the high-pressure oil pump mounting flange (2) is greater than 5 mm.

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