CN87201190U

CN87201190U - Double decker piston

Info

Publication number: CN87201190U
Application number: CN 87201190
Authority: CN
Inventors: 李德华
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-03-31
Filing date: 1987-03-31
Publication date: 1987-11-25

Abstract

The utility model discloses a double-decker piston which is suitable for four-stroke internal combustion engines. The piston of the utility model is composed of an inner piston and an outer piston which have the different structures, and the inner top face lateral of the outer piston is riveted with four guiding posts which are arranged at the same intervals; the inner piston is provided with four opposed guiding sleeves which are corresponding to the four guiding posts along the length direction of the inner wall of the inner piston, and the other ends which are riveted on the inner top face of the outer piston of the four guiding posts are respectively extended into the hollow bodies of the four guiding sleeves and respectively connected with a spring of the guiding sleeve; when a crank shaft switches to an angle of 720 DEG from an angle of 540 DEG, the inner piston pushes the outer piston via the action of a spring to make the exhaust air of the cylinder total volume discharged.

Description

Double decker piston

The utility model relates to a kind of improved by two internal combustion engines Double decker piston that form, that be specially adapted to the bigger quartastroke engine of combustion chamber volume.

Internal combustion engine up moves from the bottom, turns to the volume of cylinder when descending to claim the firing chamber to top until piston motion.The volume size of firing chamber is decided by the size of displacement, and displacement is big, and combustion chamber volume is just big, otherwise just little.The size of displacement is different with the pattern of quartastroke engine, and the firing chamber provides the place that oil inflame is expanded, so it is the pith in the internal-combustion engine.But when suction valve was backed down by driving mechanism, being equivalent to remain in waste gas in the combustion chamber volume will influence the new gas of next circuit and enter, and new gas enter with the residual exhaust gases blending after, also can influence the oil inflame effect, reduce power of IC engine.

Task of the present utility model is that a kind of improved internal combustion engine will be provided, and it not only can get rid of the residual exhaust gases in the combustion chamber volume, and the new gas that can make the cylinder increase be equivalent to combustion chamber volume replenishes.

Task of the present utility model is finished as follows: with a kind of four-stroke Large Piston, make the piston of inside and outside two different structures, the inner top surface of outer piston is other to be had four equidistant guide pillars by riveting, the bottom surface has an internal diameter to connect less than the system ring of outer piston internal diameter, inner carrier along have on the inwall length direction four with guide pillar corresponding to wearing guide pin bushing, four all have steel bushing to connect to the bottom surface of wearing guide pin bushing, one spring is arranged in the steel bushing, by riveting at the other end of four other guide pillars of outer piston inner top surface all from the guide pin bushing cavity is stretched at the top of wearing guide pin bushing, connect with spring in the steel bushing respectively, the other end spring of four guide pillars connects with the bottom surface of steel bushing.When inner carrier by system ring pulling outer piston when the cylinder the topmost part down moves, suction valve is backed down by driving mechanism, new gas is inhaled in the cylinder (Fig. 3), when inner carrier moves to lower dead centre, (be equivalent to bent axle and forward 180 ° to) from 0 °, outer piston with inertia motion, replenishes so cylinder has just increased the new gas that is equivalent to combustion chamber volume until merging (Fig. 4) with the inner carrier top rapidly with the length of spring compressed in the steel bushing, intake process finishes, and compression process begins.When bent axle when 180 ° forward 360 ° to, inner carrier promotes outer piston and walks to cylinder top (Fig. 5), oil sprayer sprays into cylinder with fuel oil, and takes fire and expand, and promotes descent of piston.When bent axle when 360 ° forward 540 ° to, piston walks to the cylinder bottom and turns to motion again, outlet valve is opened by driving mechanism, the beginning exhaust, when the cylinder exhaust gas pressure reduces to a certain degree, the spring action of outer piston in steel bushing, separate (Fig. 6) with the inner carrier top, the distance of separating equals the height of combustion chamber volume, and inner carrier just passes through spring like this, guide pillar promotes the outer piston exhaust, up to outer piston being pushed into the cylinder the topmost part, exhaust finishes, and at this moment, bent axle forwards 720 ° (Fig. 7) to from 540 °, moving inertia is overcome by inner carrier by the system ring on the outer piston simultaneously, avoids the collision of outer piston and cylinder top.When inner carrier continued motion, another new circulation repeated by same order again.The utility model is easily manufactured, and cost is lower, is adopted by relevant factory and R﹠D institution easily.

Below with reference to accompanying drawing model utility is described in further detail.

Fig. 1 is the longitudinal sectional drawing of a kind of concrete structure of the utility model.

Fig. 2 is the sectional view of Fig. 1 Double decker piston along the 2-2 line.

Fig. 3 is the air-breathing figure of Double decker piston of the present utility model.

Fig. 4 is a Double decker piston inertia combined diagram of the present utility model.

Fig. 5 is Double decker piston pressurized air figure of the present utility model.

Fig. 6 is separately figure of Double decker piston of the present utility model.

Fig. 7 is that figure is finished in Double decker piston exhaust of the present utility model.

With reference to Fig. 1, an outer piston of making of steel (1) kink is on inner carrier (4), and here, the inner top surface of outer piston is other to be had four equidistant guide pillars (2) by riveting, and its bottom surface has an internal diameter to connect less than the system ring (6) of outer piston internal diameter.Inner carrier (4) can be that cast iron is done or the outside car has six spiral oil grooves, in order to the inflow and the outflow of lubricant oil.Inner carrier (4) along have on the inwall length direction four with guide pillar (2) corresponding to wearing guide pin bushing (5), four all have a steel bushing (7) to connect to the bottom surface of wearing guide pin bushing, there is a spring (8) steel bushing (7) lining, by riveting at the other end (11) of other four guide pillars (2) of outer piston (1) inner top surface all from the guide pin bushing cavity is stretched at the top of wearing guide pin bushing (5), connect with spring (8) in the steel bushing respectively.The other end spring (8) of four guide pillars connects with the bottom surface of steel bushing (7).The top margin of inner carrier (4) has two exhaust ports (3), below the center of two exhaust ports (3), a high-pressure oil pipe (10) is all arranged, the lubricant oil that high-pressure oil pipe gushes out (9), after passing exhaust port (3) and being sprayed on the inner top surface of outer piston, bullet drops on the end face of inner carrier (4), lubricant oil is after the inner carrier end face compiles, six helical oil groove mouths from inner carrier flow into respectively, at this moment, lubricant oil flows out from following notch along conduit under the effect of gravity, so just reached the double-action of outer piston in lubricated and the cooling.In the concrete structure of Fig. 1, the inner top surface of outer piston (1) is made into bigger fillet, so that outer piston pushes up the freedom that expands when being heated, thermal stress is less, also improves mechanical strength simultaneously.In order to conduct heat well, the inner carrier top also is made into corresponding fillet.

Claims

1, a kind of by two internal combustion engines Double decker piston that form, that be specially adapted to the bigger quartastroke engine of combustion chamber volume, it is characterized in that:

A, by riveting at other four guide pillars [2] of outer piston [1] inner top surface all from the guide pin bushing cavity is stretched at the top of wearing guide pin bushing [5], the spring [8] with steel bushing [7] lining connects respectively.

B, inner carrier [4] along have on the inwall length direction four corresponding with guide pillar [2] to wearing guide pin bushing [5].

C, four all have a steel bushing [7] to connect to the bottom surface of wearing guide pin bushing.

The other end spring [8] of d, four guide pillars connects with the bottom surface of steel bushing [7].

2, piston according to claim 1 is characterized in that the bottom surface of outer piston (1) has an internal diameter to connect less than the system ring (6) of outer piston internal diameter.