Nozzle control valve of electric control pump

Abstract

The utility model provides an electric control pump nozzle control valve, which relates to the field of electric control pumps, and comprises a control valve body, a control valve core and an armature, the control valve core is arranged in the control valve body, the armature is sleeved at one end of the control valve core, and the control valve core reciprocates in the control valve body by being opened and closed by an electromagnetic valve and adsorbing the armature. A high-pressure oil cavity with an annular groove is formed in the control valve body, a first oil inlet hole and a second oil inlet hole are formed in the two end faces of the control valve body respectively, the lower end of the first oil inlet hole and the lower end of the second oil inlet hole are communicated with the annular groove respectively to form an oil inlet channel, the second oil inlet hole supplies oil to the oil nozzle, and the second oil inlet hole supplies oil to the oil nozzle. An oil inlet hole and a connecting hole are formed in a traditional valve body, the oil inlet hole and the connecting hole are communicated in a staggered mode, the bottom of the connecting hole is communicated with a high-pressure oil cavity, a set screw mounting hole is formed in the top end of the connecting hole, a set screw is assembled for sealing, and if the set screw is installed improperly, the leakage risk exists, the arrangement of the oil inlet hole is changed, and the oil leakage risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control pumps, in particular to an electric control pump nozzle control valve. Background Art

[0002] The electronically controlled pump nozzle control valve is a key component in the diesel engine fuel injection system. It is mainly composed of an electronic control unit (ECU) and a solenoid valve, which is used to accurately control the injection amount and injection timing of the fuel. The electronically controlled pump nozzle system is a type of diesel engine electronic control technology. It electronically controls fuel injection through the ECU to improve engine performance and emission standards.

[0003] like Figure 1 As shown, the traditional control valve body includes a control valve body 1, a control valve core 3, and an armature 2. A high-pressure oil chamber is opened in the control valve body, and an oil inlet hole 9 and a connecting hole 10 are opened at the same time. The oil inlet hole 9 and the connecting hole 10 are connected to the high-pressure oil chamber. A fixing screw installation hole is opened at the top of the connecting hole 10, and a fixing screw 8 is assembled to seal it. The disadvantage of this structure is that there is leakage.

[0004] Therefore, the electronically controlled pump nozzle control valve is specially designed to improve the above-mentioned shortcomings, reduce leakage and save costs. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides an electronically controlled pump nozzle control valve, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented through the following technical scheme: an electronically controlled pump nozzle control valve, composed of a control valve body, a control valve core and an armature, the control valve core is arranged in the control valve body, the armature is sleeved on one end of the control valve core, opened and closed by the electromagnetic valve, and the armature is adsorbed to make the control valve core reciprocate in the control valve body, thereby adjusting the fuel injection amount of the nozzle; it is characterized in that: a high-pressure oil chamber with an annular groove is provided in the control valve body, and an oil inlet hole 1 and an oil inlet hole 2 are respectively provided on the two end surfaces of the control valve body, the lower ends of the oil inlet hole 1 and the oil inlet hole 2 are respectively connected with the annular groove to form an oil inlet channel, and the oil inlet hole 2 supplies oil to the fuel injector, so as to reduce leakage and save costs.

[0009] Preferably, a control valve core mounting hole is provided on the control valve body, and the control valve core is mounted in the control valve core mounting hole.

[0010] Preferably, an armature mounting groove is provided on the right end surface of the control valve body, an armature is placed on the armature mounting groove, and the armature center is sleeved on the right end of the control valve core.

[0011] Preferably, an oil unloading groove is provided on the left end face of the control valve body, and the oil unloading groove is longitudinally connected to the high-pressure oil chamber. A corresponding sealing cone surface is provided on the inner side face of the stepped shaft of the control valve core. The sealing cone surface can close or open the passage between the oil unloading groove and the high-pressure oil chamber when the solenoid valve is opened or closed, and is used for unloading oil when the solenoid valve is closed.

[0012] (III) Beneficial effects

[0013] The utility model provides an electronically controlled pump nozzle control valve, which has the following beneficial effects:

[0014] The electronically controlled pump nozzle control valve changes the oil inlet hole structure of the traditional valve body. The traditional valve body is provided with an oil inlet hole and a connecting hole, the oil inlet hole and the connecting hole are staggered and connected, the bottom of the connecting hole is connected with the high-pressure oil chamber, the top of the connecting hole is provided with a fixing screw installation hole, and the fixing screw seal is assembled. If the fixing screw is not installed properly, there is a risk of leakage. For this reason, the new structure changes the setting of the oil inlet hole, and the bottom ends of the oil inlet hole 1 and the oil inlet hole 2 are both connected with the high-pressure oil chamber to form an oil supply channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a traditional control valve body;

[0016] Figure 2 It is a right side view of the utility model;

[0017] Figure 3 It is a cross-sectional view of the utility model;

[0018] Figure 4 It is a left view of the utility model;

[0019] Figure 5 for Figure 3 Enlarged view of point A.

[0020] In the figure: 1. Control valve body; 2. Armature; 3. Control valve core; 4. Ring groove; 5. Oil unloading groove; 6. Oil inlet hole 1; 7. Oil inlet hole 2; 8. Set screw; 9. Oil inlet hole; 10. Connecting hole; 11. Control valve mounting hole; 12. Armature mounting groove; 13. Sealing cone surface. DETAILED DESCRIPTION

[0021] The electronically controlled pump nozzle control valve is a key component in the diesel engine fuel injection system. It is mainly composed of an electronic control unit (ECU) and a solenoid valve, which is used to accurately control the injection amount and injection timing of the fuel. The electronically controlled pump nozzle system is a type of diesel engine electronic control technology. It electronically controls fuel injection through the ECU to improve engine performance and emission standards.

[0022] The electronically controlled pump nozzle system usually consists of the following parts: Fuel supply pump: transports fuel from the fuel tank to the engine's fuel system. Filter: removes impurities in the fuel to ensure the cleanliness of the fuel; Control valve: also known as the solenoid valve, controlled by the ECU, responsible for adjusting the flow rate and injection time of the fuel; Fuel injection unit: includes the injection pump and the injection nozzle. After the fuel is compressed in the injection pump, it is sprayed into the engine cylinder through the injection nozzle; ECU: Electronic control unit, the "brain" of the entire system, controls the switch of the solenoid valve according to the working status of the engine and the signals of other sensors, thereby controlling the injection of fuel.

[0023] The working principle of the electronic pump nozzle control valve is based on the electromagnetic effect, and the electronic control unit (ECU) is used to accurately control the injection amount and injection timing of the fuel. Its basic working principle can be divided into the following steps:

[0024] 1 Signal input: ECU receives signals from various sensors, including engine speed, load, temperature, etc. These signals reflect the current working status of the engine.

[0025] 2. Control calculation: The ECU calculates the optimal injection amount and injection timing based on the received signals combined with preset programs and algorithms.

[0026] 3 Solenoid valve control: ECU sends a control signal to the solenoid valve, and the solenoid valve opens or closes according to the ECU's instructions.

[0027] 4 Fuel injection: When the solenoid valve is opened, the fuel is compressed by the injection pump under high pressure and then sprayed into the engine cylinder through the injection nozzle.

[0028] 5. Injection quantity adjustment: ECU controls the opening and closing time of the solenoid valve to adjust the fuel injection quantity. The longer the solenoid valve is open, the more fuel is injected; conversely, the less fuel is injected.

[0029] 6 Feedback adjustment: During engine operation, the ECU will continue to receive feedback signals from the sensor and make real-time adjustments to the injection volume to ensure that the engine is always in the best working condition.

[0030] like Figure 1As shown, the conventional control valve body is provided with an oil inlet hole 9 and a connecting hole 10, which are connected to the high-pressure oil chamber, and a mounting hole for a set screw 8 is provided at the top of the connecting hole 10, and the set screw 8 is assembled and sealed. The disadvantage of this structure is that there is leakage.

[0031] The utility model embodiment provides an electronically controlled pump nozzle control valve, such as Figure 2-5 As shown. It is composed of a control valve body 1, a control valve core 3 and an armature 2. The control valve core 3 is installed in the control valve body 1. The armature 2 is sleeved on one end of the control valve core 3. The electromagnetic valve is opened and closed, and the armature 2 is adsorbed to make the control valve core 3 reciprocate in the control valve body 1, thereby adjusting the fuel injection amount of the nozzle: a high-pressure oil chamber with an annular groove 4 is provided in the control valve body 1, and an oil inlet hole 1 6 and an oil inlet hole 2 7 are respectively provided on both end surfaces of the control valve body 1. The lower ends of the oil inlet hole 1 6 and the oil inlet hole 2 7 are respectively connected with the annular groove 4 to form an oil inlet channel. The oil inlet hole 2 7 supplies oil to the fuel injection nozzle. The new oil inlet hole 9 is designed to reduce leakage and save costs.

[0032] Preferably, a control valve core 3 mounting hole is provided on the control valve body 1, and the control valve core 3 is installed in the control valve core 3 mounting hole.

[0033] like Figure 2 and 3 As shown, an armature mounting groove 12 is provided on the right end surface of the control valve body 1 , an armature 2 is mounted on the armature mounting groove 12 , and the center of the armature 2 is sleeved on the right end of the control valve core 3 .

[0034] like Figure 3 and 5 As shown, an oil unloading groove 5 is provided on the left end surface of the control valve body, and the oil unloading groove 5 is longitudinally connected with the high-pressure oil chamber. A sealing cone surface 13 is provided on the inner side surface of the stepped shaft of the corresponding control valve core 3. The sealing cone surface 13 can close or open the passage between the oil unloading groove 5 and the high-pressure oil chamber when the solenoid valve is opened and closed, and is used for unloading oil when the solenoid valve is closed.

[0035] Working principle: The oil inlet principle when the electronically controlled pump nozzle control valve is used:

[0036] Initial state

[0037] The right end of the control valve core 3 is installed with a spring. When the injector solenoid valve is not triggered, the control valve core 3 is in an initial state under the elastic action of the spring, that is, the sealing cone surface 13 of the control valve body 1 is open, the channel between the oil unloading groove 5 and the high-pressure oil chamber is open, and the pressure is unloaded through the oil unloading hole 5, so that the control valve remains in a closed state and the injector nozzle is closed.

[0038] Injection start status

[0039] When the solenoid valve is triggered, the armature 2 is attracted, the spring is compressed, and the control valve core 3 is driven to move to the right. The sealing cone surface 13 of the control valve body closes the passage between the oil unloading groove 5 and the high-pressure oil chamber. The high-pressure oil is delivered to the fuel injector through the oil inlet hole 1 6 and the oil inlet hole 2 7, and the fuel injector starts to work.

[0040] In summary, the electronically controlled pump nozzle control valve has changed the structure of the oil inlet hole 9 of the traditional valve body. The traditional valve body is provided with an oil inlet hole 9 and a connecting hole 10, and the oil inlet hole 9 and the connecting hole 10 are staggered and connected. The bottom of the vertical connecting hole 10 is connected with the high-pressure oil chamber, and the top of the connecting hole 10 is provided with a mounting hole for a set screw 8, which is assembled with the set screw 8 for sealing. If the set screw 8 is not installed properly, there is a risk of leakage. For this reason, the new structure changes the setting of the oil inlet hole 9, and the bottom ends of the oil inlet hole 1 6 and the oil inlet hole 2 7 are both connected with the high-pressure oil chamber to form an oil supply channel.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronically controlled pump nozzle control valve, comprising a control valve body (1), a control valve core (3) and an armature (2), wherein the control valve core (3) is arranged in the control valve body (1), and the armature (2) is sleeved on one end of the control valve core (3), and is opened and closed by a solenoid valve, and the armature (2) is adsorbed to make the control valve core (3) reciprocate in the control valve body (1), thereby adjusting the fuel injection amount of the nozzle; the characteristics are: A high-pressure oil chamber formed by an annular groove (4) is provided in the control valve body (1), and an oil inlet hole (6) and an oil inlet hole (7) are respectively provided on both end surfaces of the control valve body (1). The lower ends of the oil inlet hole (6) and the oil inlet hole (7) are respectively connected to the annular groove (4) to form an oil inlet channel, and the oil inlet hole (7) supplies oil to the fuel injection nozzle.

2. The electronically controlled pump nozzle control valve according to claim 1, characterized in that: The control valve body (1) is provided with a control valve core installation hole (11), and the control valve core (3) is installed in the control valve core installation hole (11).

3. The electronically controlled pump nozzle control valve according to claim 1, characterized in that: An armature installation groove (12) is provided on the right end surface of the control valve body (1), an armature (2) is arranged on the armature installation groove (12), and the center of the armature (2) is sleeved on the right end of the control valve core (3).

4. The electronically controlled pump nozzle control valve according to claim 1, characterized in that: An oil unloading groove (5) is provided on the left end surface of the control valve body (1), and the oil unloading groove (5) is longitudinally connected to the high-pressure oil chamber. A sealing cone surface (13) is provided on the inner side surface of the stepped shaft of the corresponding control valve core (3). The sealing cone surface (13) can close or open the passage between the oil unloading groove (5) and the high-pressure oil chamber when the solenoid valve is opened or closed.

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