Cooling system for heavy oil two-stroke air-cooled engine
By optimizing the design of the cooling system's air guide shroud, the problem of uneven cooling air distribution in traditional air-cooled internal combustion engines has been solved, achieving uniform heat dissipation of the cylinder head and cylinder block and low-temperature start-up of the fuel supply system, thus improving the engine's heat dissipation effect and performance.
Patent Information
- Application Number
- CN202520415559.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The air shroud of a traditional air-cooled internal combustion engine cannot distribute cooling air properly, resulting in uneven heat dissipation of the cylinder head and cylinder block, high engine temperature, increased fuel consumption, and insufficient performance. In particular, the fuel supply system temperature rises slowly in low-temperature environments, leading to starting difficulties and insufficient fuel supply.
A cooling system comprising a centrifugal fan shroud assembly and a shroud assembly is designed. By combining the centrifugal fan shroud assembly and the shroud assembly, the distribution of cooling air is optimized, ensuring uniform heat dissipation of the cylinder head and cylinder block, and isolating the fuel supply system outside the shroud, while utilizing the centrifugal fan to increase the cooling air velocity.
It achieves sufficient heat dissipation of the cylinder head and cylinder block, improves the low-temperature start performance of the fuel supply system, reduces engine temperature and fuel consumption, and improves the overall performance of the engine.
Smart Images
Figure CN223676368U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the internal combustion engine technical field relates to a heavy oil two -stroke air -cooled engine cooling system. BACKGROUND
[0002] Common air -cooled internal combustion engine often because natural cooling wind cannot satisfy the heat dissipation demand of engine, usually will give the engine installation wind deflector to satisfy the heat dissipation of engine with this, but traditional wind deflector wraps the whole engine in the wind deflector, especially the air -entraining direct injection engine, because the condition of using engine is not same, uses the engine in the low temperature area, will make the fuel supply system temperature slow -rising, poor fuel flow, and lead to the phenomenon such as difficult starting and insufficient oil supply;Traditional wind deflector can not reasonably utilize cooling wind to heat dissipation of cylinder head and cylinder block, commonly used two -stroke internal combustion engine, the heat dissipation of cylinder head needs about sixty percent of engine heat, the heat dissipation of cylinder block needs about forty percent of engine heat, because cooling wind is not distributed evenly, thereby leading to engine temperature, oil consumption increase, performance deficiency and other problems. SUMMARY
[0003] To solve the above -mentioned problem, the utility model provides a heavy oil two -stroke air -cooled engine cooling system, it mainly includes centrifugal fan wind deflector assembly and wind deflector assembly;The centrifugal fan wind deflector assembly is composed of centrifugal fan wind deflector and centrifugal fan wind deflector bottom plate;The wind deflector assembly is composed of wind deflector I, wind deflector II and air deflector, and the wind deflector I is correspondingly limited in the slot during installation, and the wind deflector I and the wind deflector II are connected and fixed by using bolts and nuts through the first bolt mounting hole, and the air deflector is limited and avoids the cylinder block, and the both ends are fastened by using the cable tie through the hole position application, so the wind deflector assembly is installed on the engine body, and the cylinder block and the cylinder head are wrapped, the bottom of the wind deflector assembly is designed according to the cylinder block fixed point characteristics, and the cable tie is used to fasten the cylinder block fixed point during assembly;The centrifugal fan wind deflector assembly wraps the generator, is installed on the wind deflector assembly, and is connected and fixed by using bolts and nuts through the second bolt mounting hole.
[0004] Preferably, the wind deflector assembly wraps the cylinder head and the cylinder block, and the fuel supply system is isolated outside the wind deflector.
[0005] Preferably, the air deflector of the wind deflector assembly is installed between the cylinder head and the cylinder block, and the cooling wind is separated to meet the heat dissipation demand of the cylinder head and the cylinder block.
[0006] Advantages:
[0007] Compared with the prior art, the cooling system's air deflector completely wraps the cylinder head and the cylinder body, and the fuel supply system is isolated outside the air deflector, which is to make the cylinder head and the cylinder body fully utilize the cooling air with less loss, and to meet the fuel supply system to meet the engine starting at low temperature, and the fuel will not be difficult to start due to low viscosity and poor flowability caused by overcooling; the air deflector assembly of the air deflector assembly separates the cooling air required by the cylinder head and the cylinder body and distributes them, the heat dissipation of the commonly used internal combustion engine cylinder head accounts for about 60% of the engine, and the heat dissipation of the cylinder body accounts for about 40% of the engine, which can maximize the utilization of the heat dissipation air volume, so as to meet the heat dissipation demand of the engine, and the heat dissipation effect of the engine is obvious, which is beneficial to improve the engine performance. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 It is a front view of the cooling system of the utility model;
[0009] Figure 2 It is a front view of the air deflector assembly of the utility model;
[0010] Figure 3 It is a sectional view of the air deflector assembly of the utility model;
[0011] Figure 4 It is a front view of the centrifugal fan air deflector assembly of the utility model;
[0012] Figure 5 It is a sectional view of the centrifugal fan air deflector assembly of the utility model;
[0013] Figure 6 It is a shaft measurement drawing of the cooling system installed to the air-cooled engine.
[0014] Figure 1 In the middle: 1 - cooling system;
[0015] Figure 2 In the middle: 11 - air deflector assembly;
[0016] Figure 3 In the middle: 111 - air deflector I; 112 - air deflector II; 113 - air deflector; A - first bolt mounting hole;
[0017] Figure 4 In the middle: 12 - centrifugal fan air deflector assembly; B - second bolt mounting hole;
[0018] Figure 5 In the middle: 121 - centrifugal fan air deflector; 122 - centrifugal fan air deflector bottom plate; 123 - centrifugal fan;
[0019] Figure 6 In the middle: 2 - engine body; 3 - fuel supply system. DETAILED DESCRIPTION
[0020] The utility model makes further illustration in combination with the drawings.
[0021] As Figures 1 to 6 The utility model provides a cooling system for heavy oil two stroke air cooled engine, it is mainly by centrifugal fan wind scooper assembly (12) and wind scooper assembly (11) composition, centrifugal fan wind scooper assembly by centrifugal fan wind scooper (121), centrifugal fan wind scooper bottom plate (122) and centrifugal fan (123) composition, wind scooper assembly (11) by wind scooper I (111), wind scooper II (112) and guide vane (113) composition, wind scooper I (111) with wind scooper II (112) installation need corresponding limit slot, and are connected fixed with nut through first I bolt mounting hole (A), and guide vane (113) limit avoids cylinder body, and two ends are tightly pasted on wind scooper assembly (11) through the ribbon tight, wind scooper assembly (11) is installed on the engine, and is completely wrapped around cylinder cover and cylinder body, and the bottom is fixed on the cylinder body through the ribbon, centrifugal fan wind scooper assembly (12) is wrapped around generator, is installed in the crankshaft front end and is connected fixed with wind scooper assembly (11) through second II bolt mounting hole (B), and centrifugal fan (123) is installed in the crankshaft end, and the generator outside.
[0022] Working principle:
[0023] When working, natural wind enters centrifugal fan wind scooper assembly (12), centrifugal fan (123) is driven to rotate by engine starting, sends cooling wind into the cooling channel of centrifugal fan wind scooper assembly (12), and simultaneously cools the generator at the front end. The air outlet of centrifugal fan wind scooper assembly (12) and the air inlet of wind scooper are consistent in size and shape, which is to facilitate the cooling wind to enter, the wind resistance to be the lowest, and the cooling wind to pass through the guide vane (113) after entering the wind scooper assembly (11) to cool the cylinder cover, the cylinder body and the silencer, and then quickly pass through the air outlet of the wind scooper assembly (11). The air outlet of the wind scooper assembly (11) is smaller than the air inlet in cross-sectional area, because the air outlet is small, a pressure difference conducive to wind speed flow is formed, so that the cooling wind speed is fast, and the engine heat dissipation efficiency is improved.
[0024] In summary, the utility model discloses novel design, simple structure, easy installation, and can use material diversity, light, low price, low processing cost, can be integrally formed by taobao 3D printing, meet the design requirement, satisfy the engine use demand.
Claims
1. A cooling system for a heavy oil two-stroke air-cooled engine, mainly characterized by a centrifugal fan air duct cover assembly (12) and an air duct cover assembly (11); the centrifugal fan air duct cover assembly is composed of a centrifugal fan air duct cover (121), a centrifugal fan air duct cover bottom plate (122) and a centrifugal fan (123); the air duct cover assembly (11) is composed of an air duct cover I (111), an air duct cover II (112) and an air duct cover plate (113); the air duct cover I (111) and the air duct cover II (112) have corresponding limiting grooves when installed, and the air duct cover I (111) and the air duct cover II (112) are connected and fixed by using bolts and nuts through the first bolt mounting hole (A); the air duct cover plate (113) is limited to avoid the cylinder block, and both ends are fastened by using a cable tie through the hole position; the air duct cover assembly (11) is installed on the engine body, wrapping the cylinder block and the cylinder head, and the bottom of the air duct cover assembly (11) is designed according to the characteristics of the cylinder block fixing point, and when assembled, the cylinder block fixing point is fastened by using a cable tie; the centrifugal fan air duct cover assembly (12) wraps the generator and is installed on the air duct cover assembly (11) and is connected and fixed by using bolts and nuts through the second bolt mounting hole (B).
2. A cooling system for a heavy fuel two-stroke air-cooled engine according to claim 1, characterized in that The air duct cover assembly wraps the cylinder block and the cylinder head, and isolates the fuel supply system outside the air duct cover.
3. A cooling system for a heavy fuel two-stroke air-cooled engine according to claim 1, characterized in that The air duct cover plate of the air duct cover assembly is installed between the cylinder head and the cylinder block, and separates the cooling air to meet the heat dissipation requirements of the cylinder head and the cylinder block.