CN206233982U - Engine piston cooling nozzle - Google Patents

Abstract

The utility model discloses an engine piston cooling nozzle, which comprises a nozzle body. The nozzle body is provided with two oil injection holes for respectively spraying oil into adjacent cylinders of the engine; Cooling the pistons in two adjacent cylinders can efficiently cool the bottom of the pistons during engine operation, saving the number of piston cooling nozzles and saving the cost of use; at the same time, the piston cooling nozzles can be directly installed on the crankcase of the engine Reserve the installation position, and then connect the engine block with the crankcase, so that the piston cooling nozzle is located under the cylinder wall between adjacent cylinders. The installation is easy to implement, and there is no need to set up separate tooling to install it, which is not only convenient and quick , Save the installation process, and the cost is greatly reduced.

Description

Engine Piston Cooling Jets

technical field

The utility model relates to the field of engines, in particular to an engine piston cooling nozzle.

Background technique

During the operation of the car, in order to ensure that the piston head of the car engine does not overheat, the piston head needs to be cooled. The principle of cooling is to set a cooling oil passage in the head of the piston, and then cool it by the piston installed on the cylinder head. The nozzle sprays cooling oil into the cooling oil passage to reduce the temperature of the piston head. In traditional engine design, one piston is usually equipped with one cooling nozzle, and the direction of fuel injection is fixed. In a multi-cylinder engine, multiple cooling nozzle brackets are required, and the piston cooling nozzles are mostly installed on the cylinder block. Chamber and piston installation structure are avoided, usually need to set up special tooling to install the piston cooling nozzle on the engine block, the installation process is complicated, and the use cost is high.

Therefore, it is necessary to improve the existing engine piston cooling nozzle, which can efficiently cool the piston during engine operation, and can save the number of parts used and cost.

Utility model content

In view of this, the utility model provides an engine piston cooling nozzle, which can efficiently cool the piston during engine operation, and can save the number of components used and cost.

The engine piston cooling nozzle of the utility model comprises a nozzle body, and the nozzle body is provided with two oil injection holes for respectively correspondingly injecting oil into adjacent cylinders of the engine.

Further, the bottom of the piston cooling nozzle forms an oil inlet hole communicating with the lubricating oil channel of the crankcase body of the engine, and the oil injection hole communicates with the oil inlet hole and is inclined upward and outward.

Further, the angle between the extension lines of the hole centers of the two oil injection holes is 70°-75°.

Further, the nozzle body extends upwards and is integrally formed with a limiting post for limited cooperation with the bottom of the cylinder wall between adjacent cylinders of the engine.

Further, the piston cooling nozzle is also provided with a ring shoulder for positioning and installing with the crankcase of the engine.

Further, the lower part of the nozzle body is provided with a sealing ring installation groove for installing the sealing ring.

Further, the oil inlet hole is a Venturi structure.

Further, the two oil injection holes are arranged symmetrically with the center line of the oil inlet hole as the center line.

Beneficial effects of the present utility model: the engine piston cooling nozzle of the present utility model is installed on the crankcase body of the engine and is located below the cylinder wall between adjacent cylinders of the multi-cylinder engine when in use. The oil holes spray oil into the adjacent cylinders located on both sides of the piston cooling nozzle to cool the bottom of the piston and also cool the connecting rod; that is, the utility model can cool the two adjacent cylinders through one piston cooling nozzle. Cooling the piston inside can efficiently cool the bottom of the piston during the running of the engine, saving the number of piston cooling nozzles and saving the cost of use; at the same time, the piston cooling nozzle can be directly installed on the reserved installation position of the crankcase of the engine , and then connect the engine block with the crankcase so that the piston cooling nozzle is located under the cylinder wall between adjacent cylinders, which is easy to install and does not need to be installed separately. It is not only convenient and fast, but also saves the installation process. And the cost is greatly reduced.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the utility model in use;

Figure 3 is a schematic diagram of the assembly of the utility model with the engine crankcase and the engine block.

detailed description

Fig. 1 is a structural representation of the utility model, Fig. 2 is a schematic diagram of the utility model in use, and Fig. 3 is a schematic diagram of assembly with the engine crankcase and the engine cylinder block in the utility model, and the dotted line represents the fuel injection direction of the injection hole among the figures, As shown in the figure: the engine piston cooling nozzle of the present embodiment includes a nozzle body 1, and the nozzle body 1 is provided with two oil injection holes for respectively correspondingly injecting oil into adjacent cylinders of the engine (the oil injection holes are shown in the figure). 5 and fuel injection hole 5a); the piston cooling nozzle of the present utility model is applicable to multi-cylinder engine, and the cylinder body 2 of engine is provided with at least two cylinders (being cylinder 3 and cylinder 3a among the figure), can be two cylinders, three cylinders Or a four-cylinder engine, the nozzle body 1 is correspondingly arranged under the cylinder wall 4 between the adjacent cylinders of the engine block 2 (the figure is cylinder 3 and cylinder 3a), and the nozzle body 1 is corresponding to the cylinders on both sides (the figure is cylinder 3 and cylinder 3a). 3a) An oil injection hole (the oil injection hole 5 and the oil injection hole 5a in the figure) that sprays oil to the bottom of the piston (the piston 6 and the piston 6a in the figure) is respectively provided; as shown in the figure, in the adjacent cylinder ( In the figure, a piston cooling nozzle is respectively provided under the bottom of the cylinder wall 4 of cylinder 3 and cylinder 3a), and the piston cooling nozzle can spray oil into the cylinders on both sides of the cylinder (cylinder 3 and cylinder 3a in the figure) to cool the piston. The bottom is cooled; wherein, the piston cooling nozzle 1 is installed on the crankcase 7 of the engine, and the crankcase 7 of the engine is provided with a piston cooling nozzle mounting seat 10, and the lower end of the piston cooling nozzle 1 is directly inserted into the mounting seat to form an installation. Then the engine block 2 is assembled with the crankcase 7, so that the piston cooling nozzles are located below the cylinder wall 4 of the adjacent cylinder (cylinder 3 and cylinder 3a in the figure); 3a) Do up and down reciprocating motion inside the engine. During the working process of the engine, the heat generated is transferred to the bottom of the piston. Using the above-mentioned cooling mechanism, one piston cooling nozzle 1 can cool the pistons in the two cylinders (cylinder 3 and cylinder 3a in the figure). The piston is cooled, and oil is sprayed upward from the bottom of the cylinder (cylinder 3 and cylinder 3a in the figure) to cool the bottom of the piston and take away the heat generated during the movement of the piston, thereby reducing the temperature of the heat engine.

In the present embodiment, the bottom of the piston cooling nozzle 1 forms the oil inlet hole 8 that communicates with the crankcase body 7 lubricating oil passage of the engine, and the oil injection hole (the oil injection hole 5 and the oil injection hole 5a in the figure) is connected with the inlet hole 8. The oil hole 8 is connected and arranged upward and outward; as shown in the figure, the oil inlet hole 8 is a vertically arranged channel structure, which extends from the bottom of the piston cooling nozzle 1 to the inside, and the oil injection hole (the oil injection hole in the figure is The oil outlet direction of the hole 5 and the oil injection hole 5a) is upward and outward and toward the bottom of the piston, forming an inclined structure.

In this embodiment, the angle α between the extension lines of the center of the two fuel injection holes is α is 70°-75°; wherein, the preferred angle α can be 70°, 71°, 72°, 73°, 74° Or 75°, within this angle range, the piston reciprocates up and down from the top dead center to the bottom dead center, and the oil sprayed by the oil injection hole (the oil injection hole 5 and the oil injection hole 5a in the figure) can reach the piston Bottom, and as the piston moves up and down, it can spray oil to cool different positions of the bottom of the piston.

In this embodiment, the nozzle body extends upwards to form a limit column 7 for limit cooperation with the bottom of the cylinder wall 4 between adjacent cylinders (cylinder 3 and cylinder 3a in the figure); that is, the bottom of the cylinder wall 4 can prevent the piston from cooling Nozzle 1 moves upwards to ensure its stable operation.

In this embodiment, the piston cooling nozzle 1 is also provided with a ring shoulder 8 for positioning installation with the crankcase 7 of the engine; it is easy to form a positioning assembly.

In this embodiment, the lower part of the body of the piston cooling nozzle 1 is provided with a sealing ring installation groove 9 for installing a sealing ring; used for installing a sealing ring to form a seal for the connection between the piston cooling nozzle and the lubricating oil channel of the crankcase body.

In this embodiment, the oil inlet hole 8 has a Venturi structure; that is, the engine oil entering the oil inlet hole 8 from the lubricating oil passage can form an acceleration effect, and spray to the bottom of the piston with a higher injection force.

In this embodiment, the two oil injection holes are arranged symmetrically with the center line of the oil inlet hole as the center line L; after the piston cooling nozzle is assembled to the crankcase, the center line of the oil inlet hole coincides with the symmetrical center line of the adjacent cylinder, That is, each piston cooling nozzle 1 is set against the bottom of the cylinder wall 4 of the adjacent cylinder (cylinder 3 and cylinder 3a in the figure) of the engine block 2, which has better centering and ensures the cylinders on both sides (the cylinder 3a in the figure). In the middle is cylinder 3 and the piston in cylinder 3a) is sprayed oil evenly.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (8)

1. a kind of engine piston cooling nozzle, it is characterised in that：Including nozzle body, be provided with the nozzle body for Two nozzle openings of oil spout in the adjacent cylinders to engine are corresponded to respectively.

2. engine piston cooling nozzle according to claim 1, it is characterised in that：The bottom of the piston cooling nozzle Formation is communicated in the fuel feed hole of the crankcase oil leab of engine, the nozzle opening connect with the fuel feed hole and it is upward to Outer incline is set.

3. engine piston cooling nozzle according to claim 1, it is characterised in that：Prolong at the hole center of nozzle opening described in two The angle of line long is 70 ° -75 °.

4. engine piston cooling nozzle according to claim 1, it is characterised in that：The nozzle body upwardly extends one Body is formed with the limited post for the spacing cooperation in casing wall bottom between engine adjacent cylinders.

5. engine piston cooling nozzle according to claim 1, it is characterised in that：Also set on the piston cooling nozzle It is equipped with the ring shoulder that location and installation is formed for the crankcase with engine.

6. engine piston cooling nozzle according to claim 1, it is characterised in that：The nozzle body bottom is provided with Sealing ring mounting groove for installing sealing ring.

7. engine piston cooling nozzle according to claim 2, it is characterised in that：The fuel feed hole is venturi knot Structure.

8. the engine piston cooling nozzle according to claim 1-7 any claims, it is characterised in that：Sprayed described in two Oilhole is symmetrical arranged by center line of the centerline hole of fuel feed hole.