CN105221232A - A kind of motorcycle twin cylinder engine piston cooling device - Google Patents

Abstract

A kind of motorcycle twin cylinder engine piston cooling device, comprise two cylinder bodies, piston is provided with in cylinder body, piston is connected with crankshaft-link rod assembly, crankshaft-link rod assembly is arranged in crankcase, the position be positioned in crankcase above two pistons is respectively equipped with fuel ring pipe, and fuel ring pipe is provided with multiple oil nozzle.During engine operation, the multiple oil nozzles on two fuel ring pipes spray cold oil facing to a piston respectively, cool piston comprehensively.The present invention sprays cold oil by multiple oil nozzles that fuel ring pipe is arranged to piston, has increased substantially the cooling effect of piston, has also improved the lubrication effect between piston and cylinder body simultaneously.

Description

Piston cooling device for motorcycle twin-cylinder engine

technical field

The invention relates to a piston cooling device for a motorcycle twin-cylinder engine.

Background technique

The Chinese patent No. 201320352629.3 discloses a piston cooling device for a motorcycle twin-cylinder engine, which includes a cylinder body, a piston, a crankshaft connecting rod assembly and a crankcase, the piston is arranged in the cylinder body, the piston is connected to the crankshaft connecting rod assembly, and the crankshaft The connecting rod assembly is arranged in the inner cavity of the crankcase, and the crankcase is provided with an oil nozzle connected to the oil pipe. When the engine is running, the oil nozzle sprays cooling oil to the piston to cool the piston. Although the cooling device has a certain cooling effect on the piston, since there is only one oil injection nozzle to spray cooling oil, the cooling effect of the piston is not good.

Contents of the invention

The purpose of the present invention is to provide a motorcycle twin-cylinder engine piston cooling device with good cooling effect.

The object of the present invention is achieved in that a motorcycle twin-cylinder engine piston cooling device comprises a cylinder body, a piston, a crankshaft connecting rod assembly and a crankcase, the crankshaft connecting rod assembly is arranged in the crankcase, and there are two cylinder bodies, A piston is arranged in the cylinder body, and the piston is connected with the crankshaft connecting rod assembly. An annular oil pipe is respectively arranged at the position above the two pistons in the crankcase, and a plurality of oil injection nozzles are arranged on the annular oil pipe. When the engine is working, multiple oil nozzles on the two annular oil pipes spray cooling oil to a piston respectively to cool the piston comprehensively.

In order to distribute the cooling oil evenly on the piston and further improve the cooling effect, the oil spray nozzles are evenly distributed on the annular oil pipe.

For simple and compact structure, the annular oil pipe is arranged on the inner cavity wall of the crankcase.

In order to ensure that all the cooling oil sprayed by the oil nozzle on the annular oil pipe is sprayed onto the piston, the outer diameter of the annular oil pipe is not greater than the diameter of the piston.

The annular oil pipe is provided with an oil inlet, and the oil inlet is connected with the oil tank through the oil pipe provided on the crankcase.

The present invention has following beneficial effects:

1. The piston cooling device of the motorcycle twin-cylinder engine of the present invention is provided with an annular oil pipe correspondingly above the piston in the crankcase, and sprays cooling oil to the piston through a plurality of oil spray nozzles arranged on the annular oil pipe, so that the cooling effect is good.

2. The piston cooling device of the motorcycle twin-cylinder engine of the present invention has the functions of cooling and lubricating the piston at the same time, which not only improves the cooling effect, but also improves the lubricating effect.

3. The present invention has a simple structure and is easy to realize.

Description of drawings

Fig. 1 is the structure schematic diagram of the piston cooling device of motorcycle two-cylinder engine of the present invention.

Fig. 2 is a schematic diagram of the annular oil pipe in the motorcycle twin-cylinder engine piston cooling device of the present invention.

FIG. 3 is a rear view of FIG. 2 .

In the figure, 1. cylinder block, 2. piston, 3. crankshaft connecting rod assembly, 4. crankcase, 5. annular oil pipe, 6. oil pipe, 7. fuel injector, 8. oil inlet, 9. fuel tank.

detailed description

Embodiment, a piston cooling device for a two-cylinder engine of a motorcycle, referring to Fig. 1 , includes two cylinders 1, two pistons 2, two pairs of crankshaft and connecting rod assemblies 3 and a crankcase 4, and the piston 1 is arranged in the cylinder 1 , the piston 2 is connected with the crankshaft connecting rod assembly 3, the crankshaft connecting rod assembly 3 is arranged in the crankcase 4, the positions above the two pistons 2 in the crankcase 4 are respectively provided with annular oil pipes 5, and the two annular oil pipes 5 are respectively connected to the crankshaft The oil passage 6 provided on the box 4 is connected, referring to Fig. 2 and Fig. 3, and the annular oil pipe 5 is provided with 6 fuel injection nozzles 7, and 4 fuel injection nozzles 7 can also be provided.

The fuel injection nozzles 7 are evenly distributed on the annular oil pipe 5 .

The annular oil pipe 5 is arranged on the inner wall of the crankcase 4 .

The outer diameter of the annular oil pipe 5 is not greater than the diameter of the piston 2 .

The annular oil pipe 5 is provided with an oil inlet 8, and the oil inlet 8 is connected with the oil tank 9 through the oil passage 6.

When the engine is working, the cooling oil in the oil tank 9 enters the two oil passages 6, enters the two annular oil pipes 5 through the oil inlet 8, and injects oil into the two pistons 2 from the multiple oil nozzles 7 on the two annular oil pipes 5. The cooling oil is sprayed evenly onto the surface of the piston 2 to fully cool the piston 2 and at the same time fully lubricate the contact surface between the piston 2 and the cylinder 1, which not only improves the cooling effect but also improves the lubrication effect.

Claims (5)

1. A piston cooling device for a motorcycle twin-cylinder engine, comprising a cylinder body (1), a piston (2), a crankshaft connecting rod assembly (3) and a crankcase (4), and the crankshaft connecting rod assembly (3) is arranged on In the crankcase (4), there are two cylinder blocks (1), and a piston (2) is arranged in the cylinder block (1), and the piston (2) is connected with the crankshaft connecting rod assembly (3), and it is characterized in that: The position above the two pistons (2) in the crankcase (4) is respectively provided with annular oil pipes (5), and the annular oil pipes (5) are provided with a plurality of oil injection nozzles (7). 2. The piston cooling device for a motorcycle twin-cylinder engine according to claim 1, characterized in that: the fuel injection nozzles (7) are evenly distributed on the annular oil pipe (5). 3. The piston cooling device for motorcycle twin-cylinder engine according to claim 1 or 2, characterized in that: the annular oil pipe (5) is arranged on the inner wall of the crankcase (4). 4. The motorcycle twin-cylinder engine piston cooling device according to claim 1 or 2, characterized in that: the outer diameter of the annular oil pipe (5) is not larger than the diameter of the piston (2). 5. The piston cooling device for motorcycle twin-cylinder engine according to claim 1 or 2, characterized in that: the annular oil pipe (5) is provided with an oil inlet (8), and the oil inlet (8) passes through The oil channel (6) arranged on the crankcase (4) is connected with the oil tank (9).