[0061] Example 1
[0062] In order to solve the problem of flow control in the prior art can only achieve flow control in large flow regions, such as Figure 1A-Figure 3 As shown, the present embodiment discloses a injector 100, including actuator 120, injector body 110, moving blocking body 130, and valve seat 140; wherein the injector main body 110 is in a hollow structure for The moving blocking body 130 is accommodated. Further, one end of the injector main body 110 is connected to one end of the valve seat 140, and the injector body 110 is co-form a valve chamber with the inner chamber of the valve seat 140, and the moving closure body 130 can slide in the valve chamber.
[0063] Wherein, the moving closure body 130 includes a valve stem 1306 and a movable limit portion 1303 disposed on the valve stem 1306, further comprising the core 1305 disposed on the end face of the valve stem 1306 close to the end surface of the valve seat 140, and the stem 1306 It is possible to slide in the longitudinal direction of the valve chamber along the valve chamber; the core 1305 can be separated from the inner peripheral surface of the other end of the valve seat 140, and the core 1305 is used to control the switches of the injector outlet 1401.
[0064] The actuator 120 is disposed on the injector body 110 and controls the reciprocating motion of the moving closure body 130 with respect to the valve seat 140; the other end of the valve seat 140 is also provided with a fuel injection outlet 1401; the moving closure body 130 is provided with a first flow The path 1301, and the first opening 1302 in fluid communication with the first flow path 1301 is provided at a position near the moving closure body 130, and the first opening 1302 is located in the longitudinal direction of the valve stem 1306 and the ball. Between the core 1305, that is, below the movable limit portion 1303, and is located above the core 1305. The injector body 110 is respectively provided with a fixed limit portion 1101 corresponding to the movable limit portion 1303.
[0065] Further, the fixed limit portion 1101 divides the inner hollow structure of the injector body 110 into an upper region 1102 and a lower region 1103, and the upper region 1102 communicates with the oil port, and the lower region 1103 communicates with the inner cavity of the valve seat 140.
[0066] When the end of the moving closure body 130 is abutting the initial position of the inner circumference surface of the valve seat 140 ( Figure 1A and Figure 1B At this time, at this time, the movable limit stream 1303 seals abuts against the fixed limit system 1101 such that the upper region 1102 and the lower region 1103 are not in communication, and the core 1305 is in contact with the injector outlet 1401, so that the first opening 1302 Not in communication with the fuel injection outlet 1401.
[0067] Further, when the actuator 120 controls the moving closure body 130 away from the valve seat 140 to the first open position ( figure 2 When the movable limit stream 1303 is sealed with the fixed limit stream 1101 such that the upper region 1102 and the lower region 1103 are not in communication, and the first opening 1302 is in communication with the fuel injection outlet 1401.
[0068] When the actuator 120 controls the moving closure body 130 to move away from the valve seat 140 to the second open position ( image 3 At the time, the movable limit stream 1303 forms a second opening 1304 between the fixed current flow unit 1101 such that the upper region 1102 and the lower region 1103 communicate, and the first opening 1302, the second opening 1304 is flowing with the fuel injection outlet 1401 flow Lu Longtong. Specifically, in the present embodiment, the key member of the present embodiment is the moving closure body 130, and the outer peripheral surface of the moving closure body 130 is also provided with a movable limit flow portion 1303, and the injector body is fixed accordingly within the circumference. The current limit unit 1101. When the actuator 120 controls the moving closure body 130 away from the valve seat 140 to the first open position, the first opening 1302 is in line with the fuel injection outlet 1401, and the movable limit stream 1303 is still sealed with the fixed limit portion 1101. Abutment, so that the upper region 1102 and the lower region 1103 are not in communication, the fuel can only flow from the first flow path 1301 of the moving closure body 130 through the first opening 1302 to the valve seat 140, then from the fuel injection outlet of the valve seat 140 1401 Flow out.
[0069] When the actuator 120 controls the moving closure body 130 to move away from the seat 140 to the second open position, the movable limit stream 1303 is formed between the movable limit stream portion 1101 and the fixed current flow portion 1101, and the first opening 1302, the second The opening 1304 is connected to the fuel injection outlet 1401 flow path, and the movable limit stream portion 1303 is disengaged from the fixed current flow portion 1101, and the upper region 1102 and the lower region 1103 are in communication, and the lower region 1103 communicates with the injector outlet 1401. The fuel can flow from the first flow path 1301 in the inside of the moving closure body 130 to the valve seat 140, and can also form a second opening 1304 directly from the movable limit flow portion 1303 and the fixed current limit portion 1101. At the valve seat 140, the fuel is then fed out from the fuel injection outlet 1401 of the valve seat 140. This embodiment controls the opening and closing of the second opening 1304 by controlling the position of the moving closure body 130 with respect to the valve seat 140, thereby achieving two levels of high flow and small flow.
[0070] Further, when the injector 100 is in a large flow state, the second opening 1304 is controlled by the moving closure body 130 with respect to the position of the valve seat 140, and further controls the opening of the second opening 1304, it can be accurate at a large flow level. control. The open time of the specific second opening 1304 is set according to the actual needs, and this embodiment does not specifically limit it.
[0071] like Figure 1A-Figure 2 As shown, according to another embodiment of the present embodiment, the injector 100 of the present embodiment disclosed, the opening area of the second opening 1304 is larger than the opening area of the fuel injection outlet 1401, and the opening of the injector outlet 1401 The area is larger than the opening area of the first opening 1302.
[0072] Specifically, when the actuator 120 controls the moving closure body 130 away from the valve seat 140 to the first open position, the first opening 1302 is connected to the fuel injection outlet 1401, and the fuel is first flowing out from the first opening 1302 into the valve seat 140. Then, from the fuel injection outlet 1401 of the valve seat 140, the flow rate of the entire injector 100 depends on the first opening 1302, since the opening area of the fuel injection outlet 1401 is larger than the opening area of the first opening 1302, the injector 100 is in a small flow state.
[0073] When the actuator 120 controls the moving closure body 130 away from the seat 140 to the second open position, the movable limit stream 1303 is formed between the movable limit stream unit 1101 and the fixed current flow portion 1101, and the first opening 1302, the second opening The 1304 is connected to the fuel injection outlet 1401 flow path, and the fuel flows from the first opening 1302 and the second opening 1304 to flow into the valve seat 140 and then flows out from the fuel injection outlet 1401 of the valve seat 140, so the flow rate of the entire injector 100 is dependent. At the first opening 1302 and the second opening 1304, since the opening area of the second opening 1304 is larger than the opening area of the fuel injection outlet 1401, the injector 100 is in a large flow state.
[0074] Through the above process, the injector 100 achieves two-stage control of large flow and small flow.
[0075] Further, the opening area of the second opening 1304 is larger than the difference in the opening area of the fuel injection outlet 1401, and the opening area of the fuel injection outlet 1401 is larger than the difference in the opening area of the first opening 1302, and can be selected according to the actual needs, the present embodiment. Do not do specific definitions.
[0076] like Figure 1A-Figure 2 As shown, according to another embodiment of the present embodiment, the injector 100 disclosed in the embodiment of the present embodiment, the moving closure body 130 is shaped in a needle valve, and the movable limit stream 1303 is from the moving blocking body 130 outer circumference. The surface-projected first annular boss 13031; the inner hollow structure of the injector main body 110 is formed in a cylindrical hollow structure, and the fixed current flow portion 1101 is formed in a second annular boss 11011 that protrudes from the inner circumference of the injector main body 110. And when the moving blocking body 130 is in the first opening position, the outer peripheral surface of the movable limit stream 1303 and the inner circumferential surface of the fixed limit portion 1101 pass through the first annular boss 13031 and the second annular boss 11011 to abut. There is no gap between the fixed limit unit 1101 and the movable limit portion 1303, and the fuel can only flow out from the first opening 1302 to the valve seat 140 and then flow out from the fuel injection outlet 1401 of the valve seat 140.
[0077] like Figure 1A-Figure 2 As shown, according to another embodiment of the present embodiment, the injector 100 disclosed in the embodiment of the present embodiment includes an oil port 150, an inlet port 150 and a first flow path 1301 in the moving blocking body 130, and The internal cavity flow path of the injector body 110 is connected, thereby enabling the fuel into the injector body 110 through the oil port 150.
[0078] like Figure 1A-Figure 2 As shown, according to another embodiment of the present embodiment, the injector 100 disclosed in the embodiment of the present embodiment, and the fuel flows through the first flow path 1301 to the first opening 1302, by the path along the moving closure body 130 The plurality of via flows to the set of via holes are flowed into the valve seat 140, and the fuel enters the valve seat 140 is further out of the plurality of through holes provided by the bottom wall of the valve seat 140.
[0079] like Figure 1A-Figure 2 As shown, according to another embodiment of the present embodiment, the injector 100 disclosed in the embodiment of the present embodiment is provided with a sealing member (not shown in the drawing) of the jet seat 140. Make sure that the injector body 110 and the sealing property at the valve seat 140 prevent fuel from leakage from the connection.
