CN2327791Y

CN2327791Y - Piston with air gate for IC engine

Info

Publication number: CN2327791Y
Application number: CN 97216535
Authority: CN
Inventors: 陈俊宇
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-12
Filing date: 1997-05-12
Publication date: 1999-07-07
Anticipated expiration: 2007-05-12

Abstract

The utility model relates to a piston for IC engine. The purpose of the utility model is to provide an improved piston. The utility model has the structure of the piston that the appearance of the piston is cylindrical, piston pin holes are arranged on the side of the piston, a ring groove used to install a gas ring and an oil ring is arranged on the outside of the piston. The utility model is characterized in that the top of the piston (1) is provided with a round port, a valve (2) whose shape is as shown in figure is arranged on the round port part, the valve (2) is supported and fixed by a supporting (3) in the piston (1), and the valve (2) can slide from top to bottom in the supporting (3); a spring (4) can make the valve (2) and the piston (1) fit tightly, and can make the valve (2) reset after opened.

Description

A kind of piston that has valve that is used for internal-combustion engine

The utility model relates to a kind of piston that is used for internal-combustion engine.

Motor is the heaviest on an automobile device, it accounts for about 1/10 of complete vehicle weight, motor preferably horsepower is big, size is little, in light weight, angle from automobile, motor too heavily is too to have wasted, in addition, because motor is too heavy, the designer feels it is that it is arranged in the front of automobile or all not too suitable in the centre of automobile when general arrangement, to the technician, when seasonable the miniaturization and of motor is studied (the authoritative serial reading matter Chinese edition of Japan: motor car engine diagram 18 as an important topic, 19 pages).

The widely used motor in countries in the world is a conventional engine at present, and conventional engine is classified according to the required piston stroke number of each work cycle, is divided into four stroke engine and two stroke engine.

Four stroke engine single cylinder operational vibration is big, adopts multicylinder engine can remedy above-mentioned shortcoming, but engine cylinder number generally will make complex structure, size and quality increase (automobile construction, 6 pages of the first volumes, People's Transportation Press) when increasing.

The two stroke engine major advantage of comparing with four stroke engine is as follows: 1, bent axle whenever circles just an expansion space stroke, therefore when the swept volume of two stroke engine is identical with four stroke engine with rotating speed, its power should equal two times of four stroke engine in theory; 2, because the frequency of generation work done process is bigger, so uniform and stable is compared in the running of two stroke engine; 3, structure is simple, quality is also smaller.

Because constructional relation, the shortcoming of two stroke engine maximum is to be difficult for getting rid of waste gas cleaner in cylinder, and when ventilation, reduced effective working stroke, and some fresh inflammable mixture is discharged from company with waste gas when ventilation, therefore two stroke engine is not as four stroke engine economy (automobile construction, 7 pages of the first volumes, People's Transportation Press).And because present widely used two stroke engine has pore on cylinder sidewall, when the opening and the pore of piston ring makes piston ring breakage easily to timing, and the pore on the cylinder has also reduced effective working stroke of motor.

The purpose of this utility model is that a kind of improved piston will be provided, this piston applications is when two stroke engine, can improve the cylinder seal effectively, not be used in perforate on the cylinder sidewall, improved the effective working stroke when ventilation, make two stroke engine have more practicability, simultaneously because the intake valve mechanism of this piston is located at internal piston, be the beeline of power output part and valve, compare that the intake valve mechanism structure is simple with four stroke engine with identical sealing, can reduce the power loss in the driving process, under the situation with the output of same engine power, the total part number of motor is few, and the motor total volume is little, gross weight is light, also can save raw material and production process simultaneously, reduce production costs, and more help the layout of motor in car.

The structure of piston that the utility model proposes is such: piston profile is cylindrical, there is piston pin hole side at piston, there is the annular groove that compression ring and oil ring are installed the piston outside, it is characterized in that having circular port at the top of piston (1), shape valve (2), valve (2) as shown in the figure is installed at the circular port place supports the location by the inner support (3) of piston (1), valve (2) can slide up and down in support (3), spring (4) can make valve (2) and piston (1) fit closely, and valve (2) is resetted after unlatching.

Specific embodiment of the utility model and accompanying drawing thereof.

Fig. 2 is the sectional drawing according to the single cylinder two-stroke motor that the utility model proposes.

Describe details and working condition in detail below in conjunction with Fig. 2 according to the motor that the utility model proposes.

This motor comprises piston (1), connecting rod (5), push rod (6), push rod Returnning spring (7), bent axle (8), gas compressor (9), fuel nozzle (10), exhaust valve (11), cylinder body (12).Valve among the figure (2) and exhaust valve (11) are in the enable possition, go out a position under piston (1) is in, and push rod (6) and push rod Returnning spring (7) are located at the inside of connecting rod (5).

As shown in the figure: during ato unit, gas compressor (9) is sent into fresh air in the crankcase, when piston (1) when moving to lower dead center, cam (13) on the bent axle (8) is with push rod (6) jack-up, push rod (6) promotes valve (2), open valve (2), fresh air enters cylinder under the promotion of gas compressor, when piston (1) when moving upward, exhaust valve (11) cuts out, bent axle (8) turns over several angle, cam (13) leaves push rod (6), push rod (6) is got back to lower position under the effect of Returnning spring (7), valve (2) is also closed under the effect of valve spring (4) thereupon, piston (1) continues to move upward and finishes compression stroke, when piston (1) during near top dead center, fuel nozzle sprays into cylinder with fuel, fuel combustion (compression ignition engine) or by the inflammable mixture in the spark ignitor cylinder (spark-ignition engine), produce high temperature and high pressure gas, promote the descending work done of piston (1), when piston (1) moves downward near lower dead center, exhaust valve (11) is opened, waste gas in the cylinder carries out free exhaust by the pressure of waste gas, then, bent axle (8) forwards predetermined angle to, cam (13) promotes push rod (6) and moves upward, push rod (6) jack-up valve (2), valve (2) is opened, and the live gas in the crankcase enters cylinder under the promotion of gas compressor (9), residual gas in the cylinder is forced to discharge, simultaneously, live gas is full of cylinder, and piston (1) begins to move upward, exhaust valve (11) cuts out, bent axle this moment (8) rotates predetermined angle, and push rod (6) resets, and valve (2) is closed, piston (1) continues to move upward, and motor repeats above-mentioned circulation.

Fig. 1 is the sectional arrangement drawing of the piston that the utility model proposes;

Fig. 2 is the drawing in side sectional elevation according to the motor that the utility model proposes.

Claims

1, a kind of piston that has valve that is used for internal-combustion engine, this piston profile is cylindrical, there is piston pin hole side at piston, there is the annular groove that compression ring and oil ring are installed the piston outside, and it is characterized in that circular port is arranged at piston (1) top, is installed with valve (2) at the circular port place, valve (2) supports the location by the inner support (3) of piston (1), valve can slide up and down in support (3), and spring (4) can make valve (2) and piston (1) fit closely, and valve (2) is resetted after unlatching.

2, piston according to claim 1 is characterized in that having circular port at piston (1) top, and at the circular port place valve (2) is installed.

3, piston according to claim 2 is characterized in that in piston (1) open top, and at opening valve (2) is installed.

4, piston according to claim 1 is characterized in that valve (2) can opening and closing.