Electromagnetic valve for engine

Abstract

The utility model provides an electromagnetic valve for an engine, and belongs to the technical field of automobile accessories. The problem that an existing electromagnetic valve for the engine is high in use cost is solved. The electromagnetic valve for the engine comprises a shell, an integrated coil, a valve body and a rear cover, the front end of the shell is fixedly connected with the valve body, the rear end of the shell is fixedly connected with the rear cover, the integrated coil is located in the shell, the connecting end of the valve body is provided with external threads, the rear cover is connected with a rotating disc rotating in the circumferential direction, two connecting wires are arranged in the rotating disc, and the outer ends of the two connecting wires extend out of the rotating disc. And a connecting structure for always connecting the positive and negative ends of the integrated coil with the inner ends of the two connecting wires respectively is arranged between the integrated coil and the turntable. The device has the advantages of low use cost and the like.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and relates to a solenoid valve, particularly a solenoid valve for an engine. Background Technology

[0002] The Fiat MultiAir engine is an innovative engine from the Fiat brand. It employs unique electro-hydraulic valve control technology, producing a maximum horsepower of 170 hp and a maximum torque of 250 Nm. This technology achieves real-time, omnidirectional control of the intake valves by establishing an ECU-controlled hydraulic mechanism at each cylinder's intake valve. Unlike the fixed mechanical connection of traditional intake valves, the fluid within the MultiAir's hydraulic chamber can be controlled by solenoid valves, thereby altering the drive relationship between the intake camshaft and the valve, achieving variable adjustment of intake valve timing and lift.

[0003] Taking a four-cylinder engine as an example, a four-cylinder engine requires four solenoid valves to control the corresponding intake valve action. Currently, these solenoid valves are interference-fitted with the cylinder head, making them non-replaceable by design. This means that if one solenoid valve malfunctions, the entire cylinder head assembly must be replaced to solve the problem. At current market prices, a single solenoid valve costs 200 yuan, while a cylinder head assembly costs 10,000 yuan. The fact that replacing a single solenoid valve requires replacing the entire cylinder head assembly is unacceptable from a user's perspective. If the Fiat MultiAir engine is to become widespread in the low-to-mid-range car market, this high operating cost is a problem that must be addressed. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing an engine solenoid valve that can reduce operating costs.

[0005] The objective of this utility model can be achieved through the following technical solution: an engine solenoid valve, comprising a housing, an integrated coil, a valve body, and a rear cover, wherein the front end of the housing is fixedly connected to the valve body, the rear end of the housing is fixedly connected to the rear cover, the integrated coil is located inside the housing, characterized in that the connecting end of the valve body has an external thread, the rear cover is connected to a circumferentially rotating turntable, the turntable is provided with two connecting wires, the outer ends of the two connecting wires extend out of the turntable, and a connecting structure is provided between the integrated coil and the turntable so that the positive and negative ends of the integrated coil are always connected to the inner ends of the two connecting wires respectively.

[0006] In the aforementioned solenoid valve for engines, the outer ends of both connecting wires extend radially out of the turntable.

[0007] In the aforementioned solenoid valve for engines, the connection structure includes a connecting block embedded in the center of the rear cover, an annular connecting ring supported by a shoulder on the inner wall of the rear cover, and the positive and negative ends of the integrated coil are respectively connected to a pair of wires. The two pairs of wires abut against the outer wall of the connecting block and the outer wall of the connecting ring, respectively, and the inner ends of the two connecting wires abut against the side of the connecting block and the side of the connecting ring, respectively.

[0008] In another scenario, in the aforementioned engine solenoid valve, the connection structure includes a small connecting ring and a large connecting ring, both annular in shape, embedded in the rear cover. The small connecting ring is located inside the large connecting ring, and both are coaxially arranged with the rear cover. The positive and negative terminals of the integrated coil are connected to the small and large connecting rings, respectively, and the inner ends of the two connecting wires abut against the small and large connecting rings, respectively. As the turntable rotates, the inner ends of the two connecting wires always abut against the small and large connecting rings, respectively, ensuring connection with the positive and negative terminals of the integrated coil.

[0009] In the aforementioned solenoid valve for engines, the turntable has an axially protruding protrusion in the middle, the rear cover has a blind hole for inserting the protrusion, the turntable has an axially penetrating arc-shaped hole, and a screw threaded into the arc-shaped hole is threaded to the rear cover, the head of the screw being used to abut against the end face of the turntable.

[0010] In the aforementioned solenoid valve for engines, there are two arc-shaped holes arranged symmetrically, and each arc-shaped hole is fitted with a screw that is threaded to the rear cover.

[0011] In another scenario, in the aforementioned solenoid valve for engines, the rear cover has a blind hole with a radially convex ring on the inner wall of the blind hole. The turntable has an axially convex insertion part that inserts into the blind hole. The insertion part has several radially convex segments that engage with the flange of the ring. This achieves axial fixation and circumferential rotation between the turntable and the rear cover, facilitating connection.

[0012] Compared with existing technologies, the solenoid valve for this engine is easy to install, ensures the effectiveness of the connection with the wiring harness, and can be detachably connected to the cylinder head by threads. If the solenoid valve becomes dirty or is damaged, the problem can be solved by replacing the individual solenoid valve, without having to replace the entire cylinder head, thus reducing operating costs. Attached Figure Description

[0013] Figure 1 This is a 3D structural diagram of the solenoid valve used in this engine.

[0014] Figure 2 This is a partial structural diagram of the solenoid valve used in this engine.

[0015] Figure 3 This is a cross-sectional view of the structure of the solenoid valve used in this engine.

[0016] Figure 4 This is a cross-sectional view of the solenoid valve used in this engine at the screw location.

[0017] In the diagram, 1. Outer shell; 2. Integrated coil; 3. Valve body; 4. Back cover; 5. External thread; 6. Turntable; 7. Connecting wire; 8. Connecting block; 9. Connecting ring; 10. Connecting wire; 11. Protrusion; 12. Arc-shaped hole; 13. Screw. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the solenoid valve for this engine includes a housing 1, an integrated coil 2, a valve body 3, and a rear cover 4. The front end of the housing 1 is fixedly connected to the valve body 3, and the rear end of the housing 1 is fixedly connected to the rear cover 4. The integrated coil 2 is located inside the housing 1. The connecting end of the valve body 3 has an external thread 5. The rear cover 4 is connected to a circumferentially rotating turntable 6. The turntable 6 has two connecting wires 7, and the outer ends of the two connecting wires 7 extend out of the turntable 6. There is a connecting structure between the integrated coil 2 and the turntable 6 so that the positive and negative ends of the integrated coil 2 are always connected to the inner ends of the two connecting wires 7 respectively.

[0020] The solenoid valves used in this engine achieve a detachable threaded connection to the cylinder head by machining external threads 5 at the connecting end of the valve body 3. If the solenoid valve becomes dirty or damaged, the problem can be solved by replacing the individual solenoid valve, eliminating the need to replace the entire cylinder head and reducing operating costs. Due to machining errors, it is impossible to guarantee that the external threads 5 of each solenoid valve are identical, which can lead to deviations in the circumferential angle after installation. Therefore, after the solenoid valves are threaded, the turntable 6 is rotated to overcome the circumferential angle deviation, ensuring that the outer ends of the two connecting wires 7 are in the correct corresponding positions for connection with the wiring harness. This connection structure ensures the effectiveness of the connection between the positive and negative ends of the integrated coil 2 and the inner ends of the two connecting wires 7, thereby guaranteeing the effective connection between the two connecting wires 7 and the wiring harness.

[0021] To elaborate further, the outer ends of both connecting lines 7 extend radially out of the turntable 6. This reduces the axial length, making the device compact and easy to install.

[0022] In this embodiment, the connection structure includes a connecting block 8 embedded in the center of the rear cover 4, and a ring-shaped connecting ring 9 supported by a shoulder on the inner wall of the rear cover 4. The positive and negative ends of the integrated coil 2 are respectively connected to connecting wires 10, which abut against the outer wall of the connecting block 8 and the outer wall of the connecting ring 9. The inner ends of the two connecting wires 7 abut against the side of the connecting block 8 and the side of the connecting ring 9, respectively. When the turntable 6 rotates, the inner end of one connecting wire 7 is always in contact with the connecting block 8, and the inner end of the other connecting wire 7 is always in contact with the connecting ring 9, thereby achieving the connection between the positive and negative ends of the integrated coil 2 and the inner ends of the two connecting wires 7. The structure is compact and has good working stability.

[0023] The turntable 6 has an axially protruding protrusion 11 in the middle, and the rear cover 4 has a blind hole for inserting the protrusion 11. The turntable 6 has an axially penetrating arc-shaped hole 12, in which a screw 13, threadedly connected to the rear cover 4, passes. The head of the screw 13 abuts against the end face of the turntable 6. Loosening the screw 13 allows the turntable 6 to rotate relative to the rear cover 4. When the outer ends of the two connecting wires 7 reach the connection position corresponding to the wire harness, the screw 13 is tightened so that the head of the screw 13 abuts against the end face of the turntable 6, thereby locking the turntable 6 to the rear cover 4. This structure is stable and prevents the turntable 6 from loosening.

[0024] In actual manufacturing, there are two arc-shaped holes 12 arranged symmetrically, and screws 13 that are threaded into both arc-shaped holes 12 are threaded to the back cover 4. In this way, after the turntable 6 is locked to the back cover 4, the connection between the two is firm and the working stability is good.

[0025] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. An engine solenoid valve, comprising a housing (1), an integrated coil (2), a valve body (3), and a rear cover (4), wherein the front end of the housing (1) is fixedly connected to the valve body (3), and the rear end of the housing (1) is fixedly connected to the rear cover (4), and the integrated coil (2) is located inside the housing (1), characterized in that, The valve body (3) has an external thread (5) at the connecting end. The rear cover (4) is connected to a circumferentially rotating turntable (6). The turntable (6) has two connecting lines (7), and the outer ends of the two connecting lines (7) extend out of the turntable (6). The integrated coil (2) and the turntable (6) are provided with a connecting structure that ensures that the positive and negative ends of the integrated coil (2) are always connected to the inner ends of the two connecting lines (7).

2. The solenoid valve for an engine according to claim 1, characterized in that, The outer ends of both connecting lines (7) extend radially out of the turntable (6).

3. The solenoid valve for an engine according to claim 1 or 2, characterized in that, The connection structure includes a connecting block (8) embedded in the middle of the back cover (4), and a ring-shaped connecting ring (9) supported by a shoulder on the inner wall of the back cover (4). The positive and negative ends of the integrated coil (2) are respectively connected to the connecting wires (10). The two connecting wires (10) abut against the outer wall of the connecting block (8) and the outer wall of the connecting ring (9) respectively. The inner ends of the two connecting wires (7) abut against the side of the connecting block (8) and the side of the connecting ring (9) respectively.

4. The solenoid valve for an engine according to claim 1 or 2, characterized in that, The connection structure includes a small connecting ring and a large connecting ring embedded in the back cover (4), both of which are annular. The small connecting ring is located inside the large connecting ring and both are coaxially arranged with the back cover (4). The positive and negative ends of the integrated coil (2) are connected to the small connecting ring and the large connecting ring respectively, and the inner ends of the two connecting lines (7) abut against the small connecting ring and the large connecting ring respectively.

5. The solenoid valve for an engine according to claim 3, characterized in that, The turntable (6) has an axially protruding protrusion (11) in the middle, the rear cover (4) has a blind hole for the protrusion (11) to be inserted, the turntable (6) has an axially penetrating arc-shaped hole (12), and a screw (13) threadedly connected to the rear cover (4) is inserted in the arc-shaped hole (12), the head of the screw (13) is used to abut against the end face of the turntable (6).

6. The solenoid valve for an engine according to claim 5, characterized in that, The number of the arc-shaped holes (12) is two and they are arranged symmetrically. Each of the two arc-shaped holes (12) is provided with a screw (13) that is threaded to the rear cover (4).

7. The solenoid valve for an engine according to claim 1 or 2, characterized in that, The rear cover (4) has a blind hole and the inner wall of the blind hole has a radially convex ring. The turntable (6) has an axially convex insertion part that is inserted into the blind hole. The insertion part has several radially convex lobes that are fastened to the flange of the ring.

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