CN207673457U - A kind of symmetrical piston for automobile engine - Google Patents

Abstract

The utility model discloses a kind of symmetrical pistons for automobile engine, including piston only, compression, skirt section, head, top, slide plate, combustion chamber, meniscus, chamber；It is characterized in that：The piston only is made of skirt section, head and top, wherein head is made of head portion and head portion, is equipped with compression and oil ring groove successively from top to bottom on head, and wherein compression is arranged two, it is equipped with chamber and thread groove in head portion, two slide plates are symmetrically installed in chamber；Two second springs are symmetrically fixedly mounted on the side of the slide plate, the second fixed block is fixedly mounted at the middle part of slide plate, is set in the upper wall of chamber there are two symmetrical half-moon groove, two meniscus is arranged with above slide plate；The first fixed block is fixedly mounted on the bottom surface of the meniscus, the first spring is fixedly mounted at the middle part of the first fixed block side；The utility model realizes the self-control of compression ratio, and high combustion efficiency.

Description

A kind of symmetrical piston for automobile engine

Technical field

The utility model is related to a kind of pistons, and in particular to a kind of symmetrical piston for automobile engine.

Background technology

Compression ratio refers to the compressed degree of engine mixed gas body, with cylinder total volume and the compressed cylinder before compression The ratio between volume (i.e. combustion chamber volume).Currently, most automobiles are using so-called ' reciprocating engine ', simply, just It is to have a piston to do straight reciprocating motion again and again, and recycle endlessly always, so at this in cylinder The movement travel range for having its certain among continual impulse stroke again in cycles.For engine some cylinder, When the stroke of piston reaches minimum point, location point at this time is just known as lower dead center, and entire cylinder includes that combustion chamber is formed by appearance Product is range volume, and when piston reverses direction moves, and reaches peak position, this location point is just known as top dead centre, institute The volume of formation is the situation of entire piston motion swept volume minimum, and the compression ratio that need to be calculated is exactly this range volume With the ratio of minimum volume.The purpose of variable compression ratio is to improve the fuel economy of engine with supercharger.In engine with supercharger In, pinking in order to prevent, compression ratio is less than NA engine.In low pressure, the thermal efficiency, which reduces, makes fuel oil Economy declines.Since supercharging level rises slowly, torque rises under the conditions of low compression ratio especially in turbocharged engine Also very slow forms so-called turbo lag phenomenon.That is, engine, in low speed, pressurization lag will wait until hair Pressure charging system just plays a role after motivation accelerates to certain rotating speed.In order to solve this problem, variable compression ratio is important method. That is low pressure running on the lower load make compression ratio be increased to it is identical as NA engine compression ratio or It is more than：On the other hand, compression ratio is suitably reduced under the high load capacity operating mode of high pressure-charging.In other words, continuous with the variation of load Compression ratio is adjusted, so as to be improved the thermal efficiency in from underload to high entire condition range.But available engine Compression ratio is immutable, because combustion chamber volume and displacement are fixed parameter, has been determined in the design It is good.

Compression ratio variation in the prior art need it is artificial go to control, can not achieve self-control, efficiency of combustion bottom.

Invention content

The purpose of this utility model is to provide a kind of symmetrical piston for automobile engine, compression ratio oneself is realized I is adjusted, and high combustion efficiency.

A kind of symmetrical piston for automobile engine, including piston only, compression, skirt section, head, top, cunning Plate, combustion chamber, meniscus, chamber；It is characterized in that：The piston only is made of skirt section, head and top, in skirt section Portion is arranged with two axis pin mouths, and wherein head is made of head portion and head portion, is equipped with gas successively from top to bottom on head Annular groove and oil ring groove, wherein compression are arranged two, and the bottom surface of first compression from top to bottom is head portion and following The divisional plane in portion is equipped with chamber and thread groove in head portion, two slide plates is symmetrically installed in chamber；The side of the slide plate On two second springs are symmetrically fixedly mounted, the second fixed block is fixedly mounted at the middle part of slide plate, wherein the second fixed block Bottom surface and chamber bottom surface in same level, set in the upper wall of chamber there are two symmetrical half-moon groove, in slide plate Top is arranged with two meniscus, and wherein meniscus is inserted into half-moon groove；It is fixedly mounted on the bottom surface of the meniscus The first fixed block, wherein the first fixed block is fixedly mounted in the groove of the second fixed block, in the first fixed block side The first spring is fixedly mounted in portion.

Further, the slide plate is tiltedly mounted on the inner wall of chamber, and wherein angle of inclination is 30 ° -45 °.

Further, one end of the second spring is fixedly mounted on the inner wall of chamber.

Further, one end of first spring is fixedly mounted on the inner wall of chamber.

Further, two sliding slots are arranged on the bottom surface of the chamber upper wall.

Further, the top is equipped with combustion chamber, and wherein combustion chamber is combined the space to be formed with slide plate and meniscus and connected It connects and communicates.

Further, thread cylinder tube sheet is fixedly mounted in the upper top surface of the head portion.

Further, the thread cylinder tube sheet is threadedly coupled with the thread groove that head portion is equipped with.

The beneficial effects of the utility model are：The present apparatus is simple in sturcture, ingenious in design；The present apparatus utilizes the first fixed block It fixes on the second fixed block, makes the present apparatus when chamber pressure increases, the movement of the mobile drive meniscus of slide plate makes burning The volume of room changes, that is, changes compression ratio；Meanwhile the present apparatus utilizes the first spring and second spring again, and the present apparatus is made to burn When chamber pressure reduces, slide plate and meniscus return to initial position, realize the self-control of compression ratio；The present apparatus is started in different The compression ratio of engine is variable under machine rotating speed, and the efficiency of combustion of each operating mode engine is all higher.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of the utility model；

Fig. 3 is the sectional view of the utility model；

Fig. 4 is the head portion structural schematic diagram of the utility model；

Fig. 5 is the head portion structural schematic diagram of the utility model.

In figure, piston only 1, axis pin mouth 2, oil ring groove 3, compression 4, skirt section 5, head 6, top 7, slide plate 8, combustion chamber 9, meniscus 10, the first fixed block 11, the second fixed block 12, half-moon groove 13, the first spring 14, thread cylinder tube sheet 15, chamber 16, second spring 17, thread groove 18.

Specific implementation mode

It is the better embodiment of the utility model below, but does not therefore limit the scope of protection of the utility model.

As shown, a kind of symmetrical piston for automobile engine, including piston only 1, compression 4, skirt section 5, Head 6, top 7, slide plate 8, combustion chamber 9, meniscus 10, chamber 16；It is characterized in that：The piston only 1 is by skirt section 5, head Portion 6 and top 7 form, and are arranged with two axis pin mouths 2 at the middle part in skirt section 5, wherein head 6 is by head portion and head portion group At, it is equipped with compression 4 and oil ring groove 3 successively from top to bottom on head 6, wherein compression 4 is arranged two, and from top to bottom the The bottom surface of one compression 4 is the divisional plane of head portion and head portion, chamber 16 and thread groove 18 is equipped in head portion, in chamber Two slide plates 8 are symmetrically installed in room 16；Two second springs 17 are symmetrically fixedly mounted on the side of the slide plate 8, in cunning The second fixed block 12 is fixedly mounted in the middle part of plate 8, wherein the bottom surface of the second fixed block 12 and the bottom surface of chamber 16 are in same water In plane, is set in the upper wall of chamber 16 there are two symmetrical half-moon groove 13, two meniscus are arranged in the top of slide plate 8 10, wherein meniscus 10 is inserted into half-moon groove 13；The first fixed block 11 is fixedly mounted on the bottom surface of the meniscus 10, Wherein the first fixed block 11 is fixedly mounted in the groove of the second fixed block 12, and peace is fixed at the middle part of 11 side of the first fixed block It is filled with the first spring 14.

Further, the slide plate 8 is tiltedly mounted on the inner wall of chamber 16, and wherein angle of inclination is 30 ° -45 °；It is described One end of second spring 17 is fixedly mounted on the inner wall of chamber 16；One end of first spring 14 is fixedly mounted on chamber 16 Inner wall on, two sliding slots are arranged on the bottom surface of 16 upper wall of chamber；The top 7 is equipped with combustion chamber 9, wherein firing The space connection formed is combined with slide plate 8 and meniscus 10 and is communicated in burning room 9；Screw thread is fixedly mounted in the upper top surface of the head portion Cylinder tube sheet 15, wherein thread cylinder tube sheet 15 are threadedly coupled with the thread groove 18 that head portion is equipped with.

The utility model devises a kind of symmetrical piston for automobile engine：The present apparatus is simple in structure, and design is skilful It is wonderful；The present apparatus is fixed using the first fixed block on the second fixed block, makes the present apparatus when chamber pressure increases, the movement of slide plate The movement for driving meniscus, makes the volume of combustion chamber change, that is, changes compression ratio；Meanwhile the present apparatus again utilize the first spring and Second spring makes the present apparatus when chamber pressure reduces, and slide plate and meniscus return to initial position, realize compression ratio self It adjusts；Present apparatus compression ratio of engine under different engine speed is variable, the burning effect of each operating mode engine Rate is all higher.

Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art Member for, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the scope of protection of the utility model.

Claims (8)

1. a kind of symmetrical piston for automobile engine, including piston only, compression, skirt section, head, top, slide plate, Combustion chamber, meniscus, chamber；It is characterized in that：The piston only is made of skirt section, head and top, the middle part in skirt section Two axis pin mouths are arranged with, wherein head is made of head portion and head portion, is equipped with compression ring successively from top to bottom on head Slot and oil ring groove, wherein compression are arranged two, and the bottom surface of first compression from top to bottom is head portion and head portion Divisional plane, head portion be equipped with chamber and thread groove, two slide plates are symmetrically installed in chamber；On the side of the slide plate Two second springs symmetrically are fixedly mounted, the second fixed block is fixedly mounted at the middle part of slide plate, wherein the second fixed block Bottom surface and the bottom surface of chamber are set in the upper wall of chamber there are two symmetrical half-moon groove, in same level in the upper of slide plate Side is arranged with two meniscus, and wherein meniscus is inserted into half-moon groove；It is fixedly mounted on the bottom surface of the meniscus First fixed block, wherein the first fixed block is fixedly mounted in the groove of the second fixed block, the middle part in the first fixed block side The first spring is fixedly mounted.

2. a kind of symmetrical piston for automobile engine according to claim 1, it is characterized in that：The slide plate tilts On the inner wall of chamber, wherein angle of inclination is 30 ° -45 °.

3. a kind of symmetrical piston for automobile engine according to claim 1, it is characterized in that：The second spring One end be fixedly mounted on the inner wall of chamber.

4. a kind of symmetrical piston for automobile engine according to claim 1, it is characterized in that：First spring One end be fixedly mounted on the inner wall of chamber.

5. a kind of symmetrical piston for automobile engine according to claim 4, it is characterized in that：The chamber upper wall Bottom surface on be arranged with two sliding slots.

6. a kind of symmetrical piston for automobile engine according to claim 1, it is characterized in that：It is set on the top Combuster, wherein combustion chamber combine the space to be formed connection with slide plate and meniscus and communicate.

7. a kind of symmetrical piston for automobile engine according to claim 1, it is characterized in that：The head portion Thread cylinder tube sheet is fixedly mounted in upper top surface.

8. a kind of symmetrical piston for automobile engine according to claim 7, it is characterized in that：The thread cylinder Tube sheet is threadedly coupled with the thread groove that head portion is equipped with.