Method for installing, detecting and calibrating pressing plate of double oil sprayers

Abstract

The invention provides a method for installing, detecting and calibrating pressing plates of double oil sprayers, which is used for meeting the requirement that two adjacent oil sprayers of a cylinder cover of a high-pressure common-rail engine share the pressing plates of the double oil sprayers for pressing and installing. The tool has the beneficial effects that the four corners of the double oil sprayer pressing plates are coplanar on the tool in advance through pre-compression plastic deformation, then the oil sprayers are installed on an engine cylinder cover, and the adjacent cylinder oil sprayers are pressed on the cylinder cover in a balanced mode at the same time through the pressing bolts and the spherical adjusting washers; the bottom of the oil injector and a cylinder cover oil injector hole seat are tightly pressed and installed effectively. According to the method, the pre-pressing process of the pressing plates of the double oil sprayers is fully utilized, the problem that the co-plane casting process of the four peripheral feet of the pressing plates of the double oil sprayers is difficult to realize is solved, compact space pressing and sealing of the adjacent air cylinder oil sprayers are realized by utilizing a simple, feasible and low-cost method, and batch production of engines is facilitated. And the device can be widely applied to oil injector installation under narrow installation working conditions of various diesel engines, gasoline engines and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of engine assembly detection, and in particular relates to a dual-injector pressure plate installation detection and calibration method. Background Art

[0002] With the continuous improvement of the degree of industrialization, power units are developing towards lightweight and miniaturization, and the restrictions on engine weight and volume are becoming increasingly stringent. Compact integrated design is widely used in the design of engine components. At the same time, the manufacturing and assembly of engines face many process inspection problems.

[0003] In the engines currently being developed, the injection molding process is difficult to detect due to the compact integrated design of the engine cylinder head. Whether the injection molding process is effectively tightened and installed directly affects the working performance of the injection molding process. Improper installation can lead to leakage at the contact point between the injection molding process and the cylinder head, needle valve sticking, and other faults. Summary of the invention

[0004] In view of this, the present invention aims to propose a dual injector pressure plate installation detection and calibration method to meet the requirements of the dual injector pressure plate compression installation shared by adjacent two-cylinder injectors of a high-pressure common rail engine cylinder head.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A dual fuel injector pressure plate installation detection and calibration method is implemented by a dual fuel injector pressure plate installation detection and calibration device, and the calibration method includes:

[0007] Based on the dual-injector pressure plate installation detection and calibration device, the press machine is used to transfer the load to the dual-injector pressure plate through the tooling clamping head and the spherical adjustment washer. The four circumferential angles are coplanar after the plastic deformation. The clamping bolt applies torque and uses the plastic deformation dual-injector pressure plate to evenly apply the load to the two adjacent injectors of the cylinder head, so as to achieve compression and reliable sealing between the injector and the cylinder head.

[0008] The press machine gradually applies a set of preloads of P+1000 N, P+2000 N, ..., P+1000*n N until the dual injector pressure plate is partially deformed and the four circumferential corners are coplanar.

[0009] Furthermore, the load P is the bolt preload corresponding to the design torque T0.

[0010] Furthermore, the dual injector pressure plate installation detection and calibration device includes a dual injector pressure plate, an injector, a tooling clamping head, clamping bolts and a cylinder head. The dual injector pressure plate is installed to the cylinder head, and the left and right sides of the dual injector pressure plate are respectively connected to the injectors. The tooling clamping head is used to pre-compress the dual injector pressure plate, and the clamping bolts are used to position the injectors on both sides of the dual injector pressure plate.

[0011] Furthermore, the dual-injector pressure plate installation detection and calibration device also includes a spherical adjustment washer, which is installed above the dual-injector pressure plate and is used to cooperate with the tooling clamping head or clamping bolt.

[0012] Furthermore, the double injector pressure plate is first pre-compressed and plastically deformed on the tooling clamping head to achieve coplanarity at the corners of the double pressure plate, and then the injector is installed: the adjacent injectors of the two cylinders are fixed to the cylinder head by tightening the double injector pressure plate through clamping bolts and spherical adjustment washers.

[0013] Furthermore, the dual fuel injector pressure plate is a structural component of adjacent fuel injectors on the cylinder head. The fuel injector on the left is pressed by two positions a and b of the dual fuel injector pressure plate, and the fuel injector on the right is pressed by two positions c and d of the dual fuel injector pressure plate.

[0014] Furthermore, the tooling pressing head acts as a press to press the force transmission structural member, and the load is applied to the dual injector pressure plate through the press.

[0015] Furthermore, the spherical adjustment gasket is a hemispherical structure, the upper plane is in contact with the tooling clamping head, and the lower spherical structure is in contact with the middle conical hole of the double injector pressure plate.

[0016] Furthermore, the cylinder head provides a support carrier for the fuel injector to be pressed and installed during the test, and the fuel injector provides an object to be pressed and installed during the test.

[0017] Compared with the prior art, the dual injector pressure plate installation detection and calibration method described in the present invention has the following advantages:

[0018] The present invention discloses a method for installing, testing and calibrating a dual fuel injector pressure plate. The present invention pre-compresses the dual fuel injector pressure plate on a tooling to achieve coplanarity at the corners of the dual pressure plate, and then installs the fuel injector on the engine cylinder head. The adjacent cylinder fuel injectors are simultaneously and evenly pressed on the cylinder head by clamping bolts and spherical adjustment washers, effectively solving the problem of tightly pressing and installing the bottom of the fuel injector and the cylinder head fuel injector hole seat. The present invention fully utilizes the pre-pressing process of the dual fuel injector pressure plate, solves the problem that the casting process of the coplanarity of the four sides of the dual fuel injector pressure plate is difficult to achieve, and uses a simple, easy and low-cost method to achieve compact space compression and sealing of adjacent cylinder fuel injectors, which is beneficial to the mass production of engines. It can also be widely used in the installation of fuel injectors under narrow installation working conditions such as various diesel engines and gasoline engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the pre-compression plastic deformation structure of the double fuel injector pressure plate according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the principle of compression installation of two adjacent cylinder injectors according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Double injector pressure plate; 2. Tool clamping head; 3. Spherical adjustment washer; 4. Cylinder head; 5. Injector; 6. Clamping bolt. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] like Figure 1 to Figure 2As shown, a dual fuel injector pressure plate installation detection and calibration method is implemented by a dual fuel injector pressure plate installation detection and calibration device, which consists of six parts: a dual fuel injector pressure plate 1, a fuel injector 5, a tooling clamping head 2, a clamping bolt 6, a spherical adjustment washer 3 and a cylinder head 4. The dual fuel injector pressure plate 1 is first pre-compressed and plastically deformed on the tooling to achieve coplanarity at the corners of the dual pressure plate, and then the fuel injector 5 is installed: the adjacent fuel injectors 5 of the two cylinders are fixed to the cylinder head 4 by tightening the dual fuel injector pressure plate 1 through the clamping bolts 6 and the spherical adjustment washer 3.

[0029] like Figure 1 As shown, the double fuel injector pressure plate 1 is a structural component of the adjacent fuel injectors 5 on the cylinder head 4. The fuel injector 5 on the left is pressed at a and b, and the fuel injector 5 on the right is pressed at c and d. The tooling pressing head 2 is used as a press to press the force transmission structural component, and the load is applied to the double fuel injector pressure plate 1 through the press. The spherical adjustment gasket 3 is a hemispherical structure, the upper plane contacts with the tooling pressing head 2, and the lower spherical structure contacts with the middle conical hole of the double fuel injector pressure plate 1.

[0030] like Figure 2 As shown, the cylinder head 4 provides a support carrier for the injection nozzle 5 to be pressed and installed during the test. The injection nozzle 5 provides an object for pressing and installing during the test. The clamping bolt 6 applies a load by torsion torque to press the injection nozzle 5 onto the cylinder head 4. The spherical adjustment washer 3 is used to coordinate the pre-tightening force of the clamping bolt 6 with the centering structure consistent with the supporting force direction of the double injection nozzle pressure plate 1 after plastic deformation. The double injection nozzle pressure plate 1 after plastic deformation is a plastic deformation structure of the adjacent injection nozzle 5 on the cylinder head 4.

[0031] Calibration methods, including:

[0032] The press machine is used to transfer the load to the double injector pressure plate 1 through the tooling pressing head 2 and the spherical adjustment washer 3. The angles a, b, c, and d are coplanar after the plastic deformation. The clamping bolt 6 applies torque and the plastic deformation double injector pressure plate 8 is used to evenly apply the load to the two injectors 5 of the adjacent cylinders of the cylinder head 4, so as to achieve compression and reliable sealing between the injector 5 and the cylinder head 4.

[0033] The press gradually applies a set of preloads P+1000 N, P+2000 N, ..., P+1000*n N, where the load P is the bolt preload corresponding to the design torque T0, until the corners a, b, c, and d of the dual injector pressure plate 1 are coplanar after local plastic deformation.

[0034] The present invention achieves coplanarity at the corners of the dual fuel injector pressure plates by pre-compression plastic deformation on the tooling, and then installs the fuel injectors on the engine cylinder head. The adjacent cylinder fuel injectors are simultaneously and evenly pressed on the cylinder head by clamping bolts and spherical adjustment washers, effectively solving the problem of tightly pressing and installing the bottom of the fuel injector and the cylinder head fuel injector hole seat. The present invention fully utilizes the pre-pressing process of the dual fuel injector pressure plates, solves the problem that the casting process of the four corners of the dual fuel injector pressure plate is difficult to achieve, and uses a simple, easy and low-cost method to achieve compact space compression and sealing of adjacent cylinder fuel injectors, which is beneficial to the realization of mass production of engines. It can also be widely used in the installation of fuel injectors under narrow installation working conditions such as various diesel engines and gasoline engines.

[0035] Example 1

[0036] First, press Figure 1 As shown, a set of preloads P, P+1000 N, ..., P+1000*n N are gradually applied by a press. The tooling clamps the head;

[0037] The spherical adjustment washer 3 transfers the load to the dual injector pressure plate 1 until the dual injector pressure plate 1 is plastically deformed and the circumferential angles a, b, c, and d are coplanar. It can be tested by a feeler gauge or other methods, and the flatness is required to be less than 0.02mm.

[0038] Then press Figure 2 As shown, the clamping bolt 6 applies the designed torque T0, and after the spherical adjusting washer 7 is used to align the center, the plastic deformation double injector pressure plate 8 is used to evenly apply the load to the two injectors 5 of the adjacent cylinders of the cylinder head 4, so as to achieve compression and reliable sealing between the injector 5 and the cylinder head 4.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual injector pressure plate installation detection and calibration method, characterized in that: The double injector pressure plate installation detection and calibration device is used to achieve the calibration method, which includes: Based on the dual-injector pressure plate installation detection and calibration device, the press machine is used to transfer the load to the dual-injector pressure plate through the tooling clamping head and the spherical adjustment washer. The four circumferential angles are coplanar after the plastic deformation. The clamping bolt applies torque and uses the plastic deformation dual-injector pressure plate to evenly apply the load to the two adjacent injectors of the cylinder head, so as to achieve compression and reliable sealing between the injector and the cylinder head. The press machine gradually applies a set of preloads of P+1000 N, P+2000 N, ..., P+1000*n N until the dual injector pressure plate is partially deformed and the four circumferential corners are coplanar.

2. A dual injector pressure plate installation detection and calibration method according to claim 1, characterized in that: Load P is the bolt preload corresponding to the design torque T0.

3. A dual injector pressure plate installation detection and calibration method according to claim 1, characterized in that: The dual-injector pressure plate installation, detection and calibration device includes a dual-injector pressure plate, an injector, a tooling clamping head, clamping bolts and a cylinder head. The dual-injector pressure plate is installed to the cylinder head, and the left and right sides of the dual-injector pressure plate are respectively connected to the injectors. The tooling clamping head is used to pre-compress and plastically deform the dual-injector pressure plate, and the clamping bolts are used to position the injectors on both sides of the dual-injector pressure plate.

4. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The dual fuel injector pressure plate installation detection and calibration device also includes a spherical adjustment washer, which is installed above the dual fuel injector pressure plate and is used to cooperate with a tooling clamping head or a clamping bolt.

5. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The double injector pressure plate is first pre-compressed and plastically deformed on the tooling clamping head to achieve coplanarity of the corners of the double pressure plate, and then the injector is installed: the adjacent injectors of the two cylinders are fixed to the cylinder head by tightening the double injector pressure plate through clamping bolts and spherical adjustment washers.

6. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The double fuel injector pressure plate is a structural member of adjacent fuel injectors on the cylinder head. The fuel injector on the left is pressed by two positions a and b of the double fuel injector pressure plate, and the fuel injector on the right is pressed by two positions c and d of the double fuel injector pressure plate.

7. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The tooling pressing head acts as a press to press the force transmission structural member, and applies the load to the dual injector pressing plate through the press.

8. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The spherical adjustment gasket is a hemispherical structure, the upper plane is in contact with the tooling pressing head, and the lower spherical structure is in contact with the middle conical hole of the double injector pressure plate.

9. A dual injector pressure plate installation detection and calibration method according to claim 3, characterized in that: The cylinder head provides a support carrier for pressing and installing the fuel injector during the test, and the fuel injector provides an object for pressing and installing during the test.

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