Engine lubricating system and engine

Abstract

The utility model relates to an engine lubricating system which comprises a main oil duct located on an engine body and a piston back cold oil duct used for cooling a piston, the engine body is integrally formed inwards to form a protrusion of the back cold oil duct, and the piston back cold oil duct is formed in the protrusion and provided with spraying holes used for spraying lubricating oil to the piston. When an engine runs, lubricating oil enters the piston back cold oil duct from the main oil duct and then is continuously sprayed to the bottom of the piston through the spraying holes to cool the piston, and it is effectively guaranteed that lubricating oil beams can be continuously sprayed to the bottom of the piston in the whole reciprocating motion process of the piston.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially a kind of engine lubricating system and engine. BACKGROUND

[0002] In the existing engine design, the design of piston back cold lubricating oil circuit, more inclined oil hole is set in the engine housing wall, when the engine is running, piston reciprocates up and down, lubricating oil is sprayed to the piston wall or bottom in a certain range to cool by avoiding cylinder body and crank through inclined oil hole, reduce the thermal load of piston: the design of the oil hole of the piston back cold of this structure is between crank and cylinder liner, due to angle and position limit, lubricating oil cannot be continuously sprayed to the bottom of piston for cooling, and the utilization rate of lubricating oil is low, and the cooling effect is poor. To achieve continuous spraying of lubricating oil to the bottom of piston for cooling, more adapter pipes are assembled to the main oil way of engine housing, and the lubricating oil is sprayed to the bottom of piston for cooling through the adapter pipe, and the structure needs to increase the adapter pipe and mounting bolt, and the housing needs to be provided with the assembly position (oil pipe mounting hole and mounting bolt screw hole) of adapter pipe, so that the investment cost is relatively high, and the process is relatively complex.

[0003] Therefore, an engine lubricating system is needed, which is simple in process, low in cost, high in lubricating oil utilization rate, improves the reliability of engine and prolongs the service life. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an engine lubricating system, piston back cold oil channel is designed in the engine body, and spray hole is arranged at the end of piston back cold oil channel, when the engine is running, lubricating oil enters piston back cold oil channel from main oil way and is continuously sprayed to the bottom of piston through spray hole, so that the piston is cooled, and the oil beam of lubricating oil can be continuously sprayed to the bottom of piston during the reciprocating motion of piston, which is effective; the second object of the utility model is to provide an engine comprising the above-mentioned engine lubricating system.

[0005] The utility model provides a kind of engine lubricating system using the following technical scheme:

[0006] An engine lubricating system, comprising main oil way located in engine body and piston back cold oil way for cooling piston, the engine body is integrally formed with the protrusion of back cold oil way inward, and the piston back cold oil way is formed in the protrusion and is provided with spray hole for spraying lubricating oil to piston.

[0007] Optionally, the protrusion is columnar protrusion 。

[0008] Optionally, the spray hole sprays oil in a direction such that when the piston is at the bottom dead center, the oil jet can be sprayed near the proximal end of the piston bottom cavity in the oil jet spraying direction; when the piston is at the top dead center, the oil jet is sprayed near the distal end of the piston bottom cavity in the oil jet spraying direction, and the spray point is located near the farthest corner.

[0009] Optionally, the columnar protrusion is located between the lower end of the piston at the bottom dead center and the crank of the engine crankshaft.

[0010] Optionally, the spray hole sprays oil in a direction close to the exhaust side of the engine.

[0011] Optionally, the columnar protrusion forms an inclined surface at the position of the spray hole, and the spray direction of the spray hole is perpendicular to the inclined surface.

[0012] Optionally, a reinforcing structure is formed between the columnar protrusion and the engine body.

[0013] Optionally, the reinforcing structure is a plurality of reinforcing ribs.

[0014] In order to achieve the second purpose, the utility model also provides an engine, the engine includes any one of the engine lubricating systems, since the engine lubricating system has the above technical effects, the engine with the engine lubricating system should also have corresponding technical effects.

[0015] In summary, the utility model includes at least one of the following beneficial technical effects: the end of the piston back cooling oil channel is provided with a spray hole, when the engine is running, the lubricating oil enters the piston back cooling oil channel from the main oil channel and is continuously sprayed to the bottom of the piston through the spray hole, the piston is cooled, and the lubricating oil jet can be continuously sprayed to the bottom of the piston during the whole reciprocating movement of the piston. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is the structure diagram of the embodiment of the utility model Figure 1 ;

[0018] Figure 2 It is the structure diagram of the embodiment of the utility model Figure 2 .

[0019] Explanation of reference signs: 1, engine block; 2, main oil passage; 3, piston back cooling oil passage; 4, reinforcing rib; 5, piston exhaust side; 6, crank; 7, spray hole; 8, slope; 9, cylinder liner; 10, piston bottom; 11, oil beam direction; 12, top dead center piston; 13, bottom dead center piston. DETAILED DESCRIPTION

[0020] The implementation manners of the present application are described below through specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art according to the disclosure. The present application can also be implemented or applied through different specific implementation manners, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application.

[0021] The accompanying drawings are referred to in the following description of the present application. Figures 1-2 The present application is described in further detail.

[0022] An engine lubrication system is disclosed in the embodiments of the present application.

[0023] Reference is made to Figures 1-2 An engine lubrication system includes a main oil passage 2 located in an engine body and a piston back cooling oil passage 3 for cooling the piston, the engine body is integrally formed with a protrusion forming the back cooling oil passage inwardly, and the piston back cooling oil passage 3 is formed in the protrusion and is provided with a spray hole 7 for spraying lubricating oil to the piston. When the engine is running, the lubricating oil enters the piston back cooling oil passage 3 from the main oil passage 2 and is continuously sprayed to the bottom of the piston through the spray hole 7, thereby cooling the piston and effectively ensuring that the lubricating oil beam 11 can be continuously sprayed to the bottom of the piston during the entire reciprocating motion of the piston.

[0024] In the present embodiment, the engine body includes a cylinder liner 9 and an engine block 1, and the main oil passage 2 is arranged on the engine block 1.

[0025] In the present embodiment, the protrusion is a columnar protrusion, and in other embodiments, the protrusion is also parallel to the crank pin.

[0026] The spray hole 7 sprays the oil beam in the direction 11 so that when the piston is at the bottom dead center (at this time, it is the bottom dead center piston 13), the oil beam can be sprayed into the near end of the piston bottom cavity in the oil beam spraying direction; when the piston is at the top dead center (at this time, it is the top dead center piston 12), the oil beam is sprayed to the top of the piston bottom cavity in the oil beam spraying direction, and the spray point is located near the farthest corner, and the oil beam can be sprayed into the bottom cavity of the piston.

[0027] The piston back cooling oil channel 3 is provided with a spray hole 7 at the end thereof, which is used to spray lubricating oil in the form of an oil jet 11 to the bottom surface of the piston, and to complete the horizontal sweeping of the bottom 10 of the piston during the up-and-down sliding of the piston, so as to achieve the lubricating and cooling effects, to ensure that the piston is fully lubricated during the operation, to reduce the wear and friction, and to help reduce the temperature of the piston, improve the working efficiency and service life of the piston, improve the reliability and durability of the engine, and provide a strong guarantee for the efficient operation of the engine.

[0028] The piston reciprocates in the cylinder sleeve 9, which is an important component of the engine and provides space for the reciprocation of the piston. The piston reciprocates in the cylinder of the cylinder sleeve 9, and together with the cylinder head forms a combustion chamber. The crank 6 is installed in the engine block 1, and the crank 6 is connected to the piston through a connecting rod. The connecting rod and the piston constitute a crank 6 connecting rod mechanism, which is a key part of the engine for power conversion. In this embodiment, the piston back cooling oil channel 3 passes through the gap between the crank 6 and the cylinder sleeve 9 and extends directly below the bottom 10 of the piston.

[0029] The spray direction 11 of the spray hole 7 is close to the exhaust side of the engine. In this embodiment, the spray direction of the oil jet is parallel to the cross section of the crankshaft, and the oil jet sprays the exhaust side of the piston bottom cavity, so that the oil jet can avoid the piston pin and the connecting rod and directly spray the bottom of the piston cavity to form splash lubrication.

[0030] The spray hole 7 can make the lubricating oil better cover the bottom surface of the piston during spraying, so that the sprayed lubricating oil can be more evenly distributed along the sliding direction of the piston, thereby providing more uniform and effective lubrication and ensuring that the piston is fully lubricated at different stages of movement.

[0031] In this embodiment, the front end is close to the main oil channel 2 direction, and the end is close to the direction directly below the piston.

[0032] A reinforcing structure is formed between the cylindrical protrusion and the engine block 1. In this embodiment, the reinforcing structure is a plurality of reinforcing ribs 4, which are arranged between the cylindrical protrusion and the engine block 1. The reinforcing ribs 4 are arranged at the front end of the piston back cooling oil channel 3, which can increase the structural strength of the piston back cooling oil channel 3, thereby ensuring the reliability of the piston back cooling oil channel 3.

[0033] In other embodiments, a frustum type can be formed to increase the diameter, which needs to avoid the lower end of the piston and the crank, and avoid the operation of the crank and the piston.

[0034] The position of the columnar protrusion arranged with the spray hole 7 forms an inclined surface, the spray direction of the spray hole 7 is perpendicular to the inclined surface 8, in the design of the piston back oil channel 3, if the spray hole 7 is directly arranged, the processing difficulty is increased due to the position, angle or space limitation. By arranging the inclined surface 8 perpendicular to the piston back oil channel 3, the processing workability of the spray hole 7 is ensured, in addition, the inclined surface 8 design is also helpful for the control of the spray angle and position of the lubricating oil, the spray direction and coverage range of the lubricating oil can be accurately controlled, and it is ensured that the lubricating oil can uniformly cover the parts needing lubrication.

[0035] The design of the piston back oil channel 3 of the utility model is an important component of the engine lubricating system, the piston back oil channel 3 is extended to the position directly below the piston bottom 10 through the main oil channel 2, necessary lubrication and cooling are provided for the piston, not only the stability of the piston in the high-speed movement process is ensured, but also the service life of the engine is effectively prolonged.

[0036] When the engine is operated, the lubricating oil enters the piston back oil channel 3 from the main oil channel 2 and is continuously sprayed to the piston bottom 10 through the spray hole 7, the piston is cooled, the engine reliability is improved, the spray hole 7 is designed in the position directly below the piston bottom 10, and is designed into a specific angle with the piston movement direction to ensure that the lubricating oil jet 11 is continuously sprayed to the piston bottom 10, this structure integrates the back cooling oil way to the crankcase, the process is simple, the cost is low, the lubricating oil utilization rate is high, the engine reliability is improved, and the service life is prolonged.

[0037] The utility model also provides an engine, the engine includes above-mentioned engine lubricating system. Since the engine adopts all the technical schemes above, it has at least all the beneficial effects brought by the technical schemes of the above embodiments, which will not be repeated here.

[0038] The principle and implementation mode of the utility model are described by applying specific examples in the paper, and the above embodiment description is only used to help understand the method and core idea of the utility model. The above is only the preferred implementation mode of the utility model, it should be pointed out that due to the limitedness of the expression, there are infinite specific structures objectively, for ordinary technical personnel in the technical field, on the premise of not departing from the principle of the utility model, a number of improvements, refinements or changes can be made, the above technical features can also be combined in a proper way, or the utility model concept and technical scheme are directly applied to other occasions without improvement, all of which should be regarded as the protection scope of the utility model.

Claims

1. An engine lubrication system, characterized in that: It includes a main oil passage located in the engine body and a piston back cooling oil passage for cooling the piston. The engine body is integrally formed with a protrusion for the back cooling oil passage, and the piston back cooling oil passage is formed in the protrusion and is provided with spray holes for spraying lubricating oil onto the piston.

2. The engine lubrication system according to claim 1, characterized in that: The protrusion is a columnar protrusion.

3. The engine lubrication system according to claim 2, characterized in that: The direction of the oil jet ejected from the spray hole is such that when the piston is at bottom dead center, the oil jet can be sprayed into the near end of the piston bottom cavity in the direction of oil jet injection; when the piston is at top dead center, the oil jet is sprayed into the near end of the piston bottom cavity in the direction of oil jet injection, and the spray point is located near the farthest angle.

4. The engine lubrication system according to claim 3, characterized in that: The columnar protrusion is located between the lower end of the piston at bottom dead center and the crankshaft of the engine.

5. The engine lubrication system according to claim 3, characterized in that: The direction of the oil jet from the spray nozzle is close to the exhaust side of the engine.

6. The engine lubrication system according to claim 2, characterized in that: The columnar protrusion forms an inclined surface at the location of the spray holes, and the spray direction of the spray holes is perpendicular to the inclined surface.

7. The engine lubrication system according to claim 2, characterized in that: A reinforcing structure is formed between the columnar protrusion and the engine body.

8. The engine lubrication system according to claim 7, characterized in that: The reinforcing structure consists of several reinforcing ribs.

9. An engine, characterized in that, Includes the engine lubrication system as described in any one of claims 1-8.

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