Two-stroke heavy oil air entraining direct injection engine air inlet connector structure
Patent Information
- Application Number
- CN202522691083.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-19
AI Technical Summary
When a drone is flying at high altitude, the oil pressure in the oil tank is too low, and the lubricating oil pump cannot deliver lubricating oil to the parts that need lubrication, which leads to increased wear on moving parts and reduced engine life.
The intake connection structure integrates a pressure compensation channel, which connects the oil tank and crankcase through a pressure compensation pipeline to balance the pressure between the two and ensure that the lubricating oil pump can work normally.
This enables normal delivery of lubricating oil in high-altitude environments, improving engine reliability and service life.
Smart Images
Figure CN224931769U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an intake connection seat structure for a two-stroke heavy oil direct injection engine, belonging to the category of internal combustion engine parts structures. Background Technology
[0002] Small two-stroke heavy-oil direct-injection engines are an important power type for unmanned aerial vehicle (UAV) systems. The intake connector is a core component of the intake system of a small two-stroke heavy-oil direct-injection engine, located between the throttle valve and the reed valve. It is responsible for transmitting the air entering from the throttle valve to the reed valve; the air then enters the crankcase through the reed valve and then into the combustion chamber. Two-stroke engines generally use a mixed-fuel lubrication method, but this method only allows a small amount of lubricating oil to diffuse to the areas that need lubrication. To accurately lubricate the components, the lubrication system is independent of the oil supply system, using dedicated lubrication lines to lubricate bearings, pistons, and other moving parts. However, UAVs often encounter low air pressure during high-altitude flight missions, leading to excessively low pressure in the oil tank. This prevents the oil pump from delivering lubricating oil to the areas that need lubrication, accelerating wear on moving parts and drastically reducing engine life. To solve the problem of excessively low oil tank pressure, a pressure compensation line needs to be added between the intake connector and the oil tank to balance the pressure in the crankcase and the oil tank. Summary of the Invention
[0003] To address the aforementioned problems, the purpose of this utility model is to provide an intake connection seat structure for a two-stroke heavy oil direct injection engine. The intake connection seat structure is characterized by comprising a reed valve connecting flange, a throttle valve connecting flange, an intake passage, a threaded hole, a pipe fitting mounting hole, a through hole, and a pressure compensation passage. The reed valve connecting flange is connected to and fitted with a reed valve, and the through hole is used for fastening the reed valve connecting flange to the reed valve. The throttle valve connecting flange is connected to and fitted with a throttle valve, and the threaded hole is used for fastening the throttle valve connecting flange to the throttle valve.
[0004] Preferably, the intake connection structure of the two-stroke heavy oil direct injection engine is characterized in that the intake passage is used to transmit the air coming in from the throttle valve to the reed valve, and the air then enters the crankcase through the reed valve.
[0005] Preferably, the intake connection seat structure of the two-stroke heavy oil direct injection engine is characterized in that the pipe fitting mounting hole is used to install a pressure compensation pipe fitting, the pressure compensation pipe fitting is connected to the oil tank through a pressure compensation pipeline, and the pressure compensation channel is connected to the pressure compensation channel on the reed valve that leads directly to the crankcase, and indirectly connected to the crankcase.
[0006] Preferably, the intake connection seat structure of the two-stroke heavy oil direct injection engine is characterized in that the pipe nozzle mounting hole is connected to the pressure compensation channel to balance the pressure of the crankcase and the oil tank.
[0007] Beneficial effects
[0008] This utility model discloses an intake connection structure for a two-stroke heavy oil direct injection engine. By integrating a pressure compensation channel, it achieves pressure balance between the crankcase and the oil tank, ensuring that the lubricating oil pump can deliver lubricating oil to the required lubrication points when the UAV is performing high-altitude flight missions, thereby improving the engine's reliability and service life. Attached Figure Description
[0009] Figure 1 This is a structural diagram of the air intake connector;
[0010] Figure 2 This is the front view of the air intake connector.
[0011] Figure 3 This is a cross-sectional view (AA) of the air intake connector.
[0012] In the picture:
[0013] 1—Reed valve connecting flange; 2—Throttle valve connecting flange; 3—Intake passage
[0014] 4—Threaded hole; 5—Connector nozzle mounting hole; 6—Through hole
[0015] 7—Pressure Compensation Channel Detailed Implementation
[0016] The specific embodiments of this utility model are further described in detail below with reference to the accompanying drawings.
[0017] like Figure 1 , Figure 2 , Figure 3 As shown, an intake connection seat structure for a two-stroke heavy oil direct injection engine is provided, which consists of a reed valve connecting flange 1, a throttle valve connecting flange 2, an intake passage 3, a threaded hole 4, a pipe nozzle mounting hole 5, a through hole 6, and a pressure compensation passage 7.
[0018] Working principle:
[0019] like Figures 1-3As shown, the reed valve connecting flange 1 is connected and secured to the reed valve through the through hole 6. After the reed valve connecting flange 1 is connected to the reed valve, the pressure compensation channel 7 is connected to the pressure compensation channel on the reed valve that connects to the crankcase. The pipe fitting mounting hole 5 is used to connect the pressure compensation pipeline, connecting the oil tank and the crankcase. When the UAV flies in a high-altitude, low-pressure environment, the gas in the crankcase enters the oil tank through the pressure compensation pipeline to compensate for the pressure in the oil tank, achieving pressure balance between the oil tank and the crankcase, ensuring that the lubricating oil pump can deliver lubricating oil to the location requiring lubrication. The throttle valve connecting flange 2 is used for the installation of the throttle valve. After the throttle valve is connected to the throttle valve connecting flange 2, the throttle valve connecting flange 2 is secured to the throttle valve through the screw and threaded hole 4. The air introduced through the throttle valve is transmitted to the reed valve through the intake channel 3. After the reed valve is opened, the air enters the crankcase through the reed valve.
[0020] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements to the technical solutions of the present utility model without departing from the design spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A structure for an intake connection seat of a two-stroke heavy oil direct injection engine, characterized in that... The intake connection seat structure includes a reed valve connecting flange (1), a throttle valve connecting flange (2), an intake passage (3), a threaded hole (4), a pipe fitting mounting hole (5), a through hole (6), and a pressure compensation passage (7); the reed valve connecting flange (1) is connected and fitted with the reed valve, and the through hole (6) is used to fasten the reed valve connecting flange (1) to the reed valve; the throttle valve connecting flange (2) is connected and fitted with the throttle valve, and the threaded hole (4) is used to fasten the throttle valve connecting flange (2) to the throttle valve.
2. The intake connection seat structure for a two-stroke heavy oil direct injection engine according to claim 1, characterized in that... The intake passage (3) is used to transmit the air coming in from the throttle valve to the reed valve, and then the air enters the crankcase through the reed valve.
3. The intake connection seat structure for a two-stroke heavy oil direct injection engine according to claim 1, characterized in that... The mounting hole (5) of the connecting pipe is used to install the pressure compensation connecting pipe. The pressure compensation connecting pipe is connected to the oil tank through the pressure compensation pipeline. The pressure compensation channel (7) is connected to the pressure compensation channel on the reed valve that leads directly to the crankcase, and is indirectly connected to the crankcase.
4. The intake connection seat structure for a two-stroke heavy oil direct injection engine according to claim 1, characterized in that... The connecting pipe mounting hole (5) is connected to the pressure compensation channel (7) to balance the pressure of the crankcase and the oil tank.