Air inlet system of engine and engine
By setting multiple air outlets and bypass pipes on the idle speed control valve, the problem of insufficient air intake caused by misaligned ignition timing in V-twin engines is solved, resulting in higher air intake and engine stability, and reducing the risk of misfire at idle speed and low throttle.
Patent Information
- Application Number
- CN202520561621.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-27
AI Technical Summary
When the ignition timing of the intake system of an existing V-twin engine is misaligned, the cylinder with the shorter ignition timing will not receive enough air, resulting in severe misfires at idle speed and low throttle. Existing technology is unable to effectively solve this problem.
Several air outlets are set on the idle speed control valve, and air is distributed to the intake passage of cylinders with short ignition timing through a bypass pipe. The air flow path is controlled by a sealing component and a stepper motor to ensure that more air enters the cylinders with short ignition timing, thereby increasing the intake volume.
The improved intake system increases the intake volume of the short-cylinder block, reduces the probability of misfire at idle and low throttle, and improves the stability and reliability of the engine.
Smart Images
Figure CN223825148U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine, especially an air intake system of engine and engine. BACKGROUND
[0002] In prior art, the air intake system of V-type double cylinder engine generally uses single valve body double air inlet pipe type valve body component bypass air control mode, two holes are opened respectively in the left and right of valve body valve piece and communicated, air is inhaled from the air filter end air inlet hole, enters two air inlet pipes from the air outlet hole after being adjusted by the idle speed control valve. However, for the double cylinder engine with misaligned ignition timing, the recovery time of air in the air inlet pipe before the air intake of the cylinder body with short ignition timing is less than that of the cylinder body with long ignition timing, when the engine is at idle speed and small throttle, the air intake of the cylinder body with short ignition timing is too little, which causes serious misfire of the cylinder body with short ignition timing at idle speed and small throttle, the greater the misalignment of ignition timing, the greater the difference in the recovery time of air in the air inlet pipe before the air intake, the less the air intake of the cylinder body with short ignition timing, and the more serious the misfire.
[0003] Therefore, it is necessary to improve the air intake system of engine in prior art to meet the use requirement of the double cylinder engine with misaligned ignition timing, so that the cylinder body of the cylinder with short ignition timing can recover more air before the air intake and inhale more air during the air intake, and reduce the misfire probability of the cylinder with short ignition timing at idle speed and small throttle. SUMMARY
[0004] Therefore, the utility model discloses an air intake system of engine and engine, which can meet the use requirement of the double cylinder engine with misaligned ignition timing, so that the cylinder body of the cylinder with short ignition timing can recover more air before the air intake and inhale more air during the air intake, and reduce the misfire probability of the cylinder with short ignition timing at idle speed and small throttle.
[0005] The air intake system of engine of the utility model, including the air throttle and the idle speed control valve, the idle speed control valve has the air inlet and a plurality of air outlets, and two air inlet pipes are arranged in communication with the air throttle, the two air inlet pipes are communicated with the air intake of two cylinders one by one, and the plurality of air outlets are communicated with different positions of the air inlet pipe of the cylinder with short ignition timing.
[0006] Further, the air outlet is two, one air outlet is communicated with the air inlet pipe of cylinder I through bypass pipe I, and the other air outlet is communicated with the air intake of cylinder I through bypass pipe II.
[0007] The cylinder I is the cylinder with short ignition timing.
[0008] Further, the outlet of the bypass pipe I is located at the position close to the cylinder body of the intake pipe of the cylinder I.
[0009] Further, the outlet of the bypass pipe II is located near the intake valve of the cylinder I.
[0010] Further, the idle control valve comprises a valve body provided with a valve cavity, the intake port and the two outlet ports are communicated with the valve cavity, and a blocking piece is arranged in the valve cavity and can be driven to move so as to make the intake port communicate with or not communicate with the two outlet ports.
[0011] Further, a stepping motor is arranged on the valve body, and the output shaft of the stepping motor is connected with the blocking piece and used for driving the blocking piece to move.
[0012] The engine of the utility model, comprising the intake system of the engine.
[0013] The utility model discloses an engine's intake system and engine, set up several outlet ports on the idle control valve, several outlet ports all communicate on the intake pipe of the cylinder of short ignition time sequence, can satisfy the use need of the double cylinder engine of short ignition time sequence with displacement, make the cylinder body of short ignition time sequence cylinder's air inlet channel can restore more air and can inhale more air when inhaling, reduce the misfire probability of short ignition time sequence cylinder at idle speed and small throttle, improve the stability of engine at idle speed and small throttle. BRIEF DESCRIPTION OF DRAWINGS
[0014] The utility model will be further described in connection with the drawings and examples:
[0015] Figure 1 It is the structure schematic view of throttle and idle control valve;
[0016] Figure 2 It is the structure schematic view when throttle is installed in engine;
[0017] Figure 3 It is the sectional view of idle control valve;
[0018] Figure 4 It is the local sectional view of bypass pipe II and the intake passage connection of cylinder I;
[0019] Among them, the above drawing contains following figure mark:
[0020] 1, idle control valve; 101, intake port; 102, outlet port; 103, blocking piece; 2, throttle; 201, intake pipe I; 202, intake pipe II; 3, bypass pipe I; 4, bypass pipe II; 5, cylinder I; 6, cylinder II; 7, intake passage I. DETAILED DESCRIPTION
[0021] Figure 1 Structure diagram of the throttle valve and the idle control valve, Figure 2 Structure diagram of the throttle valve installed on the engine, Figure 3 Sectional view of the idle control valve, Figure 4 The intake system of the engine of the embodiment includes the throttle valve 2 and the idle control valve 1, the idle control valve 1 has the air inlet 101 and a plurality of air outlets 102, two air inlet pipes are arranged in communication with the throttle valve 2, the two air inlet pipes are in one-to-one correspondence with the air inlets of the two cylinders, and the plurality of air outlets 102 are connected to different positions of the air inlet pipe of the cylinder with short ignition timing. In the structure, the engine is a V-type double-cylinder engine, one of the two cylinders of the engine has short ignition timing, and the other cylinder has long ignition timing. The throttle valve 2 is a single-valve throttle valve 2, which generally includes a valve body with an air inlet cavity and a rotatable valve plate arranged in the valve body. The driving structure for opening and closing the valve plate is the application of the prior art, and will not be described here. The throttle valve 2 is fixedly connected to the cylinder body of the engine through two air inlet pipes, and the two air inlet pipes are distributed in a figure-eight shape. The structure and control mode of the throttle valve 2 are the application of the prior art, and will not be described here.
[0022] Specifically, the two air inlet pipes are in one-to-one correspondence with the air inlets of the two cylinders. When the engine is in an idle state, air enters the air inlet 101 of the idle control valve 1 and is connected to different positions of the air inlet pipe of the cylinder with short ignition timing through a plurality of air outlets 102. For example, one of the air outlets can be connected to the position of the air inlet pipe of the cylinder with short ignition timing close to the throttle valve, and the other air outlet can be connected to the position of the air inlet pipe of the cylinder with short ignition timing close to the cylinder body. The positions can be set according to the needs of use, so that more air entering the air inlet pipe of the cylinder with short ignition timing can be gathered, the distribution of air volume can be realized, more air can be distributed to the cylinder with short ignition timing, and more air can be recovered in the air inlet pipe before the cylinder with short ignition timing inhales air and more air can be inhaled during the inhaling, thereby increasing the air intake of the cylinder with short ignition timing, optimizing the problem of frequent misfires of the cylinder with short ignition timing during engine idling, improving the stability of the engine, and at the same time, the overall structure is simple and the production cost is low.
[0023] In the embodiment, the air outlet 102 is two, the cylinder includes cylinder I 5 and cylinder II 6, one of the air outlet 102 is communicated with the intake pipe of cylinder I 5 through bypass pipe I 3, the other air outlet 102 is communicated with the intake port of cylinder I 5 through bypass pipe II 4; the air outlet 102 of idle control valve 1 is two, two air outlets 102 and air inlet form T-shaped structure, when the valve of idle control valve 1 is in the open state, two air outlets are communicated with each other, two air outlets 102 are respectively communicated with the intake pipe of cylinder I 5 and the intake port I 7 of cylinder I 5 through bypass pipe one by one, so that more air can be distributed to cylinder I 5.
[0024] The cylinder I 5 is the cylinder with short ignition sequence. The cylinder I 5 is the cylinder with short ignition sequence, and the cylinder II 6 is the cylinder with long ignition sequence. The intake pipe includes intake pipe I 201 and intake pipe II 202, the intake pipe I 201 is communicated with the intake port I 7 of cylinder I 5, and the intake pipe II 202 is communicated with the intake port II of cylinder II 6.
[0025] In the embodiment, the outlet of bypass pipe I 3 is located at the position close to the cylinder body of the intake pipe of cylinder I 5. The outlet of bypass pipe II 4 is located at the position close to the cylinder body of the intake pipe of cylinder I 5, which can shorten the air flow path when cylinder I 5 inhales, so that more air can be distributed to cylinder I 5, which is beneficial to cylinder I 5 inhaling more air at idle speed.
[0026] In the embodiment, the outlet of bypass pipe II 4 is located near the intake valve of cylinder I 5. The bypass pipe II 4 is communicated with the intake port of cylinder I 5, and the outlet of bypass pipe II 4 is located near the intake valve of cylinder I 5, that is, close to the intake valve of cylinder I 5, which is beneficial to cylinder I 5 inhaling more air and further reduces the probability of misfire of cylinder I 5 at idle speed.
[0027] In the embodiment, the idle control valve 1 includes a valve body, the valve body is provided with a valve cavity, the air inlet 101 and two air outlets 102 are communicated with the valve cavity, the valve cavity is provided with a plugging piece 103, the plugging piece 103 can be driven to move, which is used for making the air inlet 101 and two air outlets 102 communicated or not communicated. The plugging piece 103 is generally columnar structure, by moving up and down (relative to the up and down direction) of plugging piece 103, the communication of air inlet 101 and two air outlets 102 can be realized, the plugging piece 103 can be driven by screw or electromagnetic, and the communication degree of air inlet 101 and two air outlets 102 can be controlled, and the air intake amount can be further adjusted. Figure 3
[0028] In the embodiment, the valve body is provided with a stepping motor, an output shaft of the stepping motor is connected with the blocking piece 103, and the stepping motor is used for driving the blocking piece 103 to move.
[0029] The engine of the embodiment comprises the air intake system of the engine.
[0030] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limiting. Although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all of them should be covered in the scope of the claims of the utility model.
Claims
1. An intake system for an engine, characterized in that: It includes a throttle valve and an idle speed control valve. The idle speed control valve has an air inlet and several air outlets. Two air inlet pipes are connected to the throttle valve. The two air inlet pipes are connected to the air intake passages of two cylinders in a one-to-one correspondence. The several air outlets are connected to different positions of the air intake pipe of the cylinder with the shorter ignition timing.
2. The intake system of the engine according to claim 1, characterized in that: There are two air outlets. The cylinder includes cylinder I and cylinder II. One air outlet is connected to the air inlet pipe of cylinder I through bypass pipe I, and the other air outlet is connected to the air inlet of cylinder I through bypass pipe II. Cylinder I is the cylinder with the short ignition timing.
3. The intake system of the engine according to claim 2, characterized in that: The outlet of the bypass pipe I is located near the cylinder block of the intake pipe of cylinder I.
4. The intake system of the engine according to claim 2, characterized in that: The outlet of the bypass pipe II is located near the intake valve of cylinder I.
5. The intake system of the engine according to claim 2, characterized in that: The idle speed control valve includes a valve body with a valve cavity. The air inlet and two air outlets are connected to the valve cavity. A sealing element is provided in the valve cavity. The sealing element can be driven to move so that the air inlet is connected to or disconnected from the two air outlets.
6. The intake system of the engine according to claim 5, characterized in that: The valve body is equipped with a stepper motor, and the output shaft of the stepper motor is connected to the sealing component to drive the sealing component to move.
7. An engine, characterized in that: The intake system of the engine as described in any one of claims 1-6.