CN212130651U

CN212130651U - Engine and vehicle

Info

Publication number: CN212130651U
Application number: CN201922082149.XU
Authority: CN
Inventors: 杨金旺; 张东华; 曹思雨; 屈伟; 张鹏; 韩桂苓; 尤伟鹏; 常进才; 苏博浩
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-12-11
Anticipated expiration: 2029-11-27

Abstract

The utility model provides an engine and vehicle, the engine form engine cylinder body and the engine cylinder lid that has the engine combustion chamber including enclosing, in the last sprayer of having installed of engine cylinder lid, the tip of sprayer stretches into in the engine combustion chamber, and in be equipped with on the inner wall of engine combustion chamber and keep off and put the air guide unit of sprayer one side. The engine can reduce the temperature of sprayer, and then reduce the oil mist temperature, weaken the detonation tendency of engine, make the burning more abundant, prolong the life of sprayer simultaneously to can improve the thermal efficiency of engine, reduce the emission of engine pollutant.

Description

Engine and vehicle

Technical Field

The utility model relates to a vehicle parts technical field, in particular to engine. The utility model discloses still relate to the vehicle of installing this engine.

Background

The engine is a key part for vehicle operation, the performance of the engine directly influences the quality of the vehicle, the engine mainly comprises an engine cylinder body and an engine cylinder cover, a combustion chamber is enclosed between the engine cylinder body and the engine cylinder cover, an air inlet channel and an exhaust channel which are respectively communicated with the combustion chamber are arranged on the engine cylinder cover, and an oil sprayer and a spark plug are arranged on the engine cylinder cover.

The oil injector can inject oil into a combustion chamber, the oil is mixed with air entering the combustion chamber through an air inlet to form oil-gas mixed gas, the oil-gas mixed gas can be ignited by a spark plug, so that a piston in an engine cylinder body is pushed to do work outwards, the oil releases a large amount of heat in the combustion process, and the end part of the oil injector is an area where the oil is concentrated, so that the temperature of the end part of the oil injector is higher, the heat dissipation energy of the end part of the existing oil injector is poor, the end part of the oil injector is likely to be locally overheated, the temperature of oil mist sprayed by the oil injector is improved, the detonation tendency of an engine is directly increased, and the service.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an engine to can make the sprayer have better radiating effect, and then reduce the oil mist temperature, weaken the detonation tendency of engine, make the burning more abundant, improve the life of sprayer simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an engine comprises an engine cylinder body and an engine cylinder cover which are formed into an engine combustion chamber in a surrounding mode, wherein an oil sprayer is arranged on the engine cylinder cover, the end portion of the oil sprayer extends into the engine combustion chamber, and an air guide unit which is arranged on one side of the oil sprayer in a blocking mode is arranged on the inner wall of the engine combustion chamber.

Furthermore, an air inlet channel and an air exhaust channel which are respectively communicated with the engine combustion chamber are arranged on the engine cylinder cover, and the oil injector is positioned between the air inlet channel and the air exhaust channel and is obliquely arranged towards one side close to the air inlet channel; and the included angle beta between the axis of the fuel injector and the axis of the piston in the engine cylinder body is between 4 and 8 degrees.

Furthermore, a spark plug is arranged on the cylinder cover of the engine, is positioned between the air inlet channel and the air outlet channel and is obliquely arranged towards one side close to the air outlet channel; and the included angle alpha between the axis of the spark plug and the axis of the piston is between 8 and 12 degrees.

Further, the electrode center of the spark plug is located on the axis of the piston, wherein the electrode center is the midpoint of a connecting line between the positive electrode and the negative electrode of the spark plug.

Furthermore, a bowl-shaped groove is formed in the top surface of the piston, and the maximum depth L2 of the groove is 5.4-5.7 mm.

Furthermore, the vertical distance L3 between the central point of the air inlet far away from the end face of one end of the engine combustion chamber and the axis of the engine combustion chamber is 80-86 mm.

Furthermore, the engine cylinder body and the engine cylinder cover are made of aluminum alloy materials.

Further, the length L1 of the fuel injector extending into the combustion chamber of the engine is 0.8-1.2 mm.

Furthermore, the air guide unit is including constructing the arch on the engine combustion chamber inner wall, the arch is located the sprayer, be close to on one side of intake duct, and to keeping away from the direction of sprayer, bellied cross-section diminishes the setting.

Compared with the prior art, the utility model discloses following advantage has:

the engine, through inciting somebody to action the tip of sprayer sets up to stretching into in the engine combustion chamber, and will the length L1 control that the sprayer stretches into in the engine combustion chamber is between 0.8mm ~ 1.2mm, can be when less to the gas flow influence in the engine combustion chamber, take away sprayer tip heat by the gas flow in the engine combustion chamber, reduce the sprayer temperature, and then reduce the oil mist temperature, weaken the detonation tendency of engine, make the burning more abundant, improve sprayer life simultaneously.

Another object of the present invention is to provide a vehicle, wherein the engine is mounted on the vehicle.

The utility model discloses a vehicle has the same beneficial effect with foretell engine, no longer gives unnecessary details here.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic diagram of an engine structure according to a first embodiment of the present invention;

fig. 2 is a bottom view of the cylinder head of the engine according to the first embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 1;

fig. 4 is an enlarged view at B in fig. 1.

Description of reference numerals:

1-engine combustion chamber, 11-cylinder cover combustion chamber, 12-air guide unit, 2-oil injector, 3-piston, 301-groove, 4-air inlet channel, 5-exhaust channel and 6-spark plug.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The present embodiment relates to an engine comprising an engine block enclosing an engine combustion chamber 1 and an engine cylinder head on which a fuel injector 2 is mounted, the end of the fuel injector 2 projecting into the engine combustion chamber 1 and on the inner wall of the engine combustion chamber 1 being provided an air guiding unit 12 which is arranged to stop on the fuel injector side, as shown in fig. 1 and 3.

The operation of the engine is schematically described as follows, it should be noted that the drawings of the present embodiment do not fully show the structure of the engine cylinder block and the engine cylinder head, the piston 3 is slidably disposed in the engine cylinder block, the cylinder head combustion chamber 11 is configured on the engine cylinder head, after the engine cylinder block is fastened with the engine cylinder head, the head space of the piston 3 and the cylinder head combustion chamber 11 form the engine combustion chamber 1, the engine cylinder head is further configured with the intake passage 4 and the exhaust passage 5, an intake valve capable of making the intake passage 4 open and close to the engine combustion chamber 1 is disposed between the intake passage 4 and the engine combustion chamber 1, an exhaust valve capable of making the exhaust passage 5 open and close to the engine combustion chamber 1 is disposed between the exhaust passage 5 and the engine combustion chamber 1, and the engine cylinder head is provided with the spark plug 6.

Initially, an exhaust valve cuts off an exhaust passage 5 and an engine combustion chamber 1, an air inlet passage 4 is communicated with the engine combustion chamber 1, external air can enter the engine combustion chamber 1 through the air inlet passage 4, meanwhile, an oil injector 2 injects oil into the engine combustion chamber 1, the oil is mixed with the air entering the engine combustion chamber 1 to form oil-gas mixed gas, and the oil-gas mixed gas can be ignited by a spark plug 6 so as to push a piston 3 to do work outwards; after the oil-gas mixed gas in the engine combustion chamber 1 is combusted, the inlet valve cuts off the air inlet passage 4 from the engine combustion chamber 1, the exhaust passage 5 is communicated with the engine combustion chamber 1, and waste gas generated by combustion of the oil-gas mixed gas is exhausted through the exhaust passage 5.

In the working process of the engine, because the air has initial kinetic energy when entering the engine combustion chamber 1 through the air inlet channel 4, the air can form tumble in the engine combustion chamber 1 through the guidance of each side wall of the engine combustion chamber 1 and the top surface of the piston 3, the tumble can improve the mixing effect of the air and the oil, the more uniform the oil and the air are mixed, the more sufficient the oil is combusted, the higher the combustion efficiency of the engine is, and the lower the pollutant discharge amount is.

In the working process of the engine, because the oil liquid at the end part of the oil injector 2 is concentrated, the combustion at the end part of the oil injector 2 is violent, so that the temperature at the end part of the oil injector 2 is high, the temperature of the oil mist sprayed by the oil injector 2 is correspondingly improved, the knocking tendency of the engine is increased, and the service life of the oil injector 2 is influenced. In this embodiment, the end of the injector 2 is arranged to extend into the engine combustion chamber 1, and partial heat at the end of the injector 2 can be taken away by the flow of air entering the engine combustion chamber 1 through the air inlet passage 4, so that the temperature at the end of the injector 2 is reduced, the temperature of oil mist can be reduced, the knocking tendency of the engine is reduced, the combustion is more sufficient, and the service life of the injector 2 is prolonged.

However, since the injector 2 extending into the engine combustion chamber 1 may block the flow path of air and may disturb the flow direction of gas in the engine combustion chamber 1, in the present embodiment, referring to fig. 1, an air guide unit 12 is provided on the inner wall of the engine combustion chamber 1 to block the injector 2. The air guide unit 12 can guide the air flow at the position, accelerate the speed of the air flow passing through the position, reduce the influence of the fuel injector 2 extending into the combustion chamber 1 of the engine on the air flow, and enable the air flow to take away part of heat at the end part of the fuel injector 2 more quickly. Specifically, in the present embodiment, referring to fig. 1 and 3, the air guide unit 12 specifically includes a protrusion configured on the inner wall of the engine combustion chamber, the protrusion being located on the side of the injector close to the intake passage 4, and the protrusion being arranged with a cross section that is gradually smaller toward the direction away from the injector 2. Preferably, one end of the protrusion, which is far away from the fuel injector 2, is in a sharp point shape, and one end of the protrusion, which is close to the fuel injector 2, is attached to the periphery of the fuel injector and is flat with the bottom surface of the fuel injector.

In the embodiment, the length L1 of the end of the fuel injector 2 extending into the engine combustion chamber 1 is set to be 0.8-1.2 mm, so that the influence of the fuel injector 2 on the air flow in the engine combustion chamber 1 can be further reduced to a low level while the heat dissipation effect of the end of the fuel injector 2 is satisfied, wherein the length L1 of the fuel injector 2 extending into the engine combustion chamber 1 may be, for example, any one of 0.8mm, 0.9mm, 1.1mm, and 1.2mm, the length L1 is preferably 1mm, and the length L1 may be any other value of 0.8-1.2 mm.

On the basis of the above, the inventor also optimizes the arrangement of the injector 2, and referring to fig. 1, the injector 2 is arranged between the exhaust passage 5 and the intake passage 4 and is inclined toward the side close to the intake passage 4; and the included angle beta between the axis of the oil injector 2 and the axis of the piston 3 is between 4 and 8 degrees; the included angle β may be, for example, any one of 4 °, 5 °, 7 °, and 8 °, and is preferably 6 °, and the included angle β may also be any other value from 4 ° to 8 °. By arranging the oil injector 2 according to the angle, the matching degree of the incident angle of oil liquid to the engine combustion chamber 1 and the flowing direction of air in the engine combustion chamber 1 can be improved, so that the oil liquid and the air are mixed more uniformly, the combustion sufficiency of the oil liquid can be improved, the heat efficiency of an engine is improved, and the emission of engine pollutants, particularly PN particle pollutants, is reduced.

Meanwhile, the inventor also improves the arrangement of the spark plug 6, referring to fig. 1, the spark plug 6 is located between the exhaust passage 5 and the intake passage 4 and is arranged to be inclined to one side close to the exhaust passage 5, and an included angle α between an axis of the spark plug 6 and an axis of the piston 3 is between 8 ° and 12 °, the included angle α may be, for example, any one of 8 °, 9 °, 11 ° and 12 °, and the included angle α is preferably 10 °, and it should be noted that the included angle α may also be any other value of 8 ° to 12 °. In the present embodiment, the electrode center of the spark plug 6 is also arranged to be located on the axis of the piston 3, and it should be noted that, referring to fig. 1 and 4, the electrode center refers to the midpoint P of the connecting line between the positive electrode and the negative electrode of the spark plug 6.

By arranging the ignition plug 6 as described above, it is possible to prevent the spark plug from being damaged due to electricityThe polar center is located on the axis of the piston 3, namely, the polar center is located at the center of the engine combustion chamber 1, because the oil-gas mixed gas is ignited at the polar center, namely, the electrode center is the center of flame, when the electrode center is arranged at the center of the engine combustion chamber 1, the flame can be spread to the peripheral side, the flame is uniform, the combustion of the oil-gas mixed gas is more sufficient, the detonation tendency of the engine can be reduced, and NO in tail gas of the engine can be reduced_x(oxynitride) and CO (carbon monoxide).

In order to reduce the power loss when the air flow collides with the top surface of the piston 3, in the present embodiment, as shown in fig. 1, a groove 301 having a bowl shape is formed on the top surface of the piston 3 so that the air flow can be guided by the side wall of the groove 301. However, the provision of the grooves 301 increases the compression depth of the piston 3 during operation, which affects the thermal efficiency of the engine, in the present embodiment, the maximum depth L2 of the grooves 301 is set to be 5.4 to 5.7mm, the depth L2 may be, for example, any one of 5.4mm, 5.5mm, 5.6mm and 5.7mm, and the depth L2 is preferably 5.5mm, and it should be noted that the depth L2 may be any other value of 5.4 to 5.7 mm. Through setting up recess 301 according to above-mentioned size, can be when reducing the air current power loss, less to the influence of the compression depth of piston 3 to can increase the tumble strength in the engine combustion chamber 1, make the combustion of the oil-gas mixture more even in the engine combustion chamber 1, can improve the thermal efficiency of engine, reduce the pollutant emission volume of engine.

In this embodiment, a vertical distance L3 between a center point of an end surface of the intake duct 4 far from the engine combustion chamber 1 and an axis of the engine combustion chamber 1 is between 80mm and 86mm, the vertical distance L3 may be, for example, any one of 80mm, 81mm, 82mm, 84mm, 85mm, and 86mm, and is preferably 83mm, and it should be noted that the vertical distance L3 may also be any other value of 80mm to 86 mm.

By setting the vertical distance L3 according to the size, compared with the prior art, the length of the air inlet channel 4 is shortened, the compactness of the engine can be improved, the air inlet pressure of the engine and the heat of air entering the engine combustion chamber 1 can be effectively reduced, and the knocking tendency of the engine can be reduced; in addition, because intake duct 4 length is shorter, just also can reduce the power loss behind the air current intake duct 4, can improve the tumble strength in the engine combustion chamber 1, make air and fluid mixture comparatively even, make the combustion of the interior gas-oil mixture of engine combustion chamber 1 more abundant, and then improve the thermal efficiency of engine, reduce the engine pollutant emission.

In this embodiment, the engine block is preferably made of an aluminum alloy, and the engine cylinder head is also preferably made of an aluminum alloy.

In summary, in the engine of the present embodiment, the end of the injector 2 is configured to extend into the engine combustion chamber 1, and the air guide unit 12 is disposed on one side of the injector, so as to reduce the temperature of the end of the injector 2, further reduce the temperature of the oil mist, reduce the knocking tendency of the engine, make the combustion more sufficient, and improve the service life of the injector 2, meanwhile, the present embodiment can improve the thermal efficiency of the engine and reduce the emission of pollutants of the engine by changing the positions of the spark plug 6 and the injector 2, and in addition, by providing the bowl-shaped groove 301 on the top surface of the engine and improving the size of the air inlet 4, the tumble strength in the engine combustion chamber 1 can be improved, the thermal efficiency of the engine can be further improved, and the emission of pollutants of the engine.

Example two

The present embodiment relates to a vehicle, on which an engine as described in the first embodiment is mounted.

The vehicle of the embodiment can reduce the fuel consumption of the vehicle and improve the fuel economy of the vehicle by installing the engine according to the first embodiment.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine comprising an engine block and an engine cylinder head enclosing an engine combustion chamber (1), on which engine cylinder head a fuel injector (2) is mounted, characterized in that: the end part of the fuel injector (2) extends into the engine combustion chamber (1), and an air guide unit which is arranged on one side of the end part in a blocking mode is arranged on the inner wall of the engine combustion chamber (1).

2. The engine of claim 1, wherein: an air inlet channel (4) and an air exhaust channel (5) which are respectively communicated with the engine combustion chamber (1) are arranged on the engine cylinder cover, and the oil injector (2) is positioned between the air inlet channel (4) and the air exhaust channel (5) and is obliquely arranged towards one side close to the air inlet channel (4); and the included angle beta between the axis of the fuel injector (2) and the axis of the piston (3) in the engine cylinder body is between 4 and 8 degrees.

3. The engine of claim 2, wherein: a spark plug (6) is arranged on the cylinder cover of the engine, and the spark plug (6) is positioned between the air inlet passage (4) and the exhaust passage (5) and is obliquely arranged towards one side close to the exhaust passage (5); and the included angle alpha between the axis of the spark plug (6) and the axis of the piston (3) is between 8 and 12 degrees.

4. The engine of claim 3, wherein: the electrode center of the spark plug (6) is positioned on the axis of the piston (3), wherein the electrode center is the midpoint (P) of a connecting line between the positive electrode and the negative electrode of the spark plug (6).

5. The engine of claim 2, wherein: the top surface of the piston (3) is provided with a bowl-shaped groove (301), and the maximum depth L2 of the groove (301) is between 5.4 and 5.7 mm.

6. The engine of claim 2, wherein: the air inlet channel (4) is far away from the central point of one end face of the engine combustion chamber (1) and the vertical distance L3 between the axes of the engine combustion chamber (1) is 80-86 mm.

7. The engine of claim 1, wherein: the engine cylinder body and the engine cylinder cover are made of aluminum alloy materials.

8. The engine of claim 1, wherein: the length L1 of the fuel injector extending into the combustion chamber of the engine is 0.8-1.2 mm.

9. The engine of claim 2, wherein: the air guide unit is in including the structure protruding on the engine combustion chamber (1) inner wall, the arch is located the tip, be close to on one side of intake duct, and to keeping away from the direction of tip, bellied cross-section diminishes the setting.

10. A vehicle, characterized in that: an engine as claimed in any one of claims 1 to 9 provided on the vehicle.