CN202441488U

CN202441488U - Miniature two-stroke gas engine

Info

Publication number: CN202441488U
Application number: CN2012200498598U
Authority: CN
Inventors: 张玉明; 陈煜林; 杨涛; 刘胜虎
Original assignee: LINYI SANHE YONGJIA POWER CO Ltd
Current assignee: SHANDONG YONGJIA POWER CO., LTD.
Priority date: 2012-02-16
Filing date: 2012-02-16
Publication date: 2012-09-19
Anticipated expiration: 2022-02-16

Abstract

The utility model discloses a small two-stroke gas engine, which belongs to the field of internal combustion engines. It solves the defect that the gas and engine oil cannot be mixed after the gas is used as fuel in the prior art for the two-stroke engine. It mainly includes crankcase, cylinder block, gasifier, and portable gas cylinder. There is a combustion chamber in the cylinder body, and the portable gas cylinder is connected to the gasifier through a gas pipe; the small two-stroke gas engine is equipped with an oil lubrication system, and the oil lubrication system The system includes oil bottle, oil pump, oil pump turbine, crankshaft worm, oil supply pipe, oil delivery pipe, oil return pipe and carburetor connecting flange, oil bottle and oil pump are installed on the engine crankcase, and carburetor connecting flange is installed On the engine block, the crankshaft worm rod is assembled on the crankshaft and meshes with the turbine of the oil pump. The oil bottle is connected to the oil pump through the oil delivery pipe. The connecting flange of the oil pump and the gasifier is connected through the oil supply pipe. There is an oil return pipe between them. The utility model is mainly used for small agricultural machinery, garden machinery and plant protection machinery.

Description

Small-sized two-stroke gas motor

Technical field

The utility model belongs to a kind of internal-combustion engine, specifically, relates in particular to small-sized two-stroke gas motor

Background technique

In fields such as graden machine, equipment for plant protection, peasant's machine, mostly supporting small two stroke engines.Gas engine has obvious superiority than fuel engine aspect discharging; Use combustion gas to compare with using traditional fuel; Gas engine is granular material discharged almost nil, and the discharging of NOx, CO and HC also significantly reduces, so combustion gas has significance aspect the air quality improving.At present, a lot of countries especially use at the automobile industry gas power all in the use of advocating this clean energy resource in a large number.

And also using traditional fuel now as the supporting small-sized two-stroke gasoline engine in fields such as graden machine, equipment for plant protection, peasant's machine.This mainly contains following two problems decision:

One, traditional small-sized two-stroke gasoline engine adopts Mixed lubrication, is stored in after promptly gasoline and machine oil mix by a certain percentage and supplies with the petrol engine use in the fuel tank.Miscella gets into crankcase lubrication in Carburetor atomizing back.And after adopting combustion gas to act as a fuel, combustion gas adopts traditional mode to mix with machine oil.

Two, small-sized two-stroke gasoline engine is mostly as field mating power such as graden machine, equipment for plant protection, peasant's machines, and these facility basically all are that family uses.This just requires must be in light weight, flexibility and reliability.But it is, very heavy no matter the combustion gas that traditional combustion gas still is present automobile to be used all is to be stored in the steel cylinder after liquefaction or the compression.

Mini four-stroke gasoline engine in the market has seldom part repacking back use combustion gas as fuel.Gaseous fuel is stored in the portable domestic gas cylinder, and this gas cylinder is in light weight, and price is low, and is easy to use.Gas cylinder fuel passes through the vaporizer supply engine through the decompression back.This gas cylinder has solved the fuel storage problem, and four stroke engine generally adopts fuel and lubricated mode of separating, and on lubricated, does not have problems.Solved fuel supply and lubricated these two problems, the Small Universal gas engine does not have great problem basically at technical elements.Therefore there is the combustion gas four of part manufacturer production to occur in general small-size power market in recent years towards motor.But as the especially supporting home-use graden machine of minitype motivation, four-stroke gasoline engine has inborn weakness, i.e. complex structure, and easy care is especially heavy a lot of than two stroke engine with the engine weight under the power.

Summary of the invention

In order to solve the above-mentioned defective that exists in the existing technology; That is: four-stroke gasoline engine complex structure, not easy care, heavy; Combustion gas adopted traditional mode to mix with machine oil after two stroke engine adopted combustion gas to act as a fuel, and the utility model provides a kind of small-sized two-stroke gas motor.

The utility model is to adopt following technological scheme to realize: a kind of small-sized two-stroke gas motor; Comprise crankcase, cylinder body, vaporizer, portable cylinder; Portable cylinder is fixed on the crankcase, is provided with the firing chamber in the cylinder body, and portable cylinder is connected through fuel tube with vaporizer; Said small-sized two-stroke gas motor is provided with the oil lubricating system; The oil lubricating system comprises oil bottle, oil pump, oil pump turbine, bent axle scroll bar, fuel supply line, transport pipe, return tube, vaporizer adpting flange; Oil bottle, oil pump are installed on the engine crankcase, and the vaporizer adpting flange is installed on the engine cylinder-body, and the bent axle scroll bar is assemblied on the bent axle; Mesh with the oil pump turbine; Oil bottle is connected through transport pipe with oil pump, and oil pump is connected through fuel supply line with the vaporizer adpting flange, also is provided with return tube between oil pump and the oil bottle.

Preferably be provided with reduction valve on the fuel tube.

Compared with prior art, the beneficial effect of the utility model is: utilize the portable domestic gas cylinder as the two-stroke motor fuel case, act as a fuel with combustion gas, solved the high problem of discharging of current two stroke engine; Adopt to separate and lubricate, it is placed apart to be about to fuel and machine oil, and machine oil is squeezed in the vaporizer adpting flange through oil pump, gets into crankcase lubrication with combustion gas mixing atomizing back there.Because motor demand to lubricant oil under different operating modes is different, oil pump can be exactly according to the demand supplying lubricating oil; Separate the lubricated uppity shortcoming of oil level of having avoided traditional two stroke engine Mixed lubrication; Efficiently solve two stroke engine idling carbon deposit phenomenon and idling and emit the blue smoke phenomenon; Oil consumption and idling pollutant reduce greatly.

Description of drawings

Fig. 1 is the plan view of the utility model;

Fig. 2 is the utility model left view;

Fig. 3 is the right elevation of the utility model;

Fig. 4 is the partial enlarged drawing A of Fig. 1;

Fig. 5 is the partial enlarged drawing B of Fig. 1.

Among the figure: 1, portable cylinder, 2, fuel tube, 3, fuel supply line, 4, vaporizer, 5, the vaporizer adpting flange; 6, silencing apparatus, 7, the bent axle scroll bar, 8, the oil pump turbine, 9, transport pipe, 10, return tube; 11, oil pump, 12, cylinder body, 13, spark plug, 14, piston; 15, bent axle, 16, oil bottle, 17, reduction valve, 18, crankcase.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Embodiment one, a kind of small-sized two-stroke gas motor; Comprise cylinder body 12, crankcase 18, vaporizer 4, portable cylinder 1; Portable cylinder 1 is fixed on the cylinder body 12, is provided with the firing chamber in the cylinder body 12, and portable cylinder 1 is connected through fuel tube 2 with vaporizer 4; Said small-sized two-stroke gas motor is provided with the oil lubricating system; The oil lubricating system comprises oil bottle 16, oil pump 11, oil pump turbine 8, bent axle scroll bar 7, fuel supply line 3, transport pipe 9, return tube 10, vaporizer adpting flange 5; Oil bottle 16, oil pump 11 are installed on the engine crankcase 18, vaporizer adpting flange 5 is installed on the engine cylinder-body 12; Bent axle scroll bar 7 is assemblied on the bent axle 15, and with 8 engagements of oil pump turbine, oil bottle 16 is connected through transport pipe 9 with oil pump 11; Oil pump 11 is connected through fuel supply line 3 with vaporizer adpting flange 5, is provided with return tube 10 between oil pump 11 and the oil bottle 16.

Embodiment two, fuel tube 2 are provided with reduction valve 17; Other is identical with embodiment one.

The working principle of the utility model is: portable gas bottle 1 provides inflammable gas, and combustion gas flow into fuel tube 2 from portable gas bottle 1 under portable gas bottle 1 self pressure and crankcase negative pressure; Because being stored in the combustion gas of portable gas bottle 1 is liquefaction, when becoming gas, can absorb a large amount of heats, fuel gas temperature is very low, can influence the machine performance of gas engine, therefore need give preheating to the combustion gas of relative low temperature.Fuel tube 2 is through the heat radiation window of motor front, and the heat of engine producing blows on the fuel tube 2, accomplishes the warm to combustion gas; Combustion gas after the preheating is through vaporizer 4, and the effect of vaporizer 4 is according to engine power and change in rotational speed corresponding combustion gas to be provided; Combustion gas is when getting into vaporizer adpting flange 5 through vaporizer 4 backs; Run into the machine oil that oil pump 11 provides; The combustion gas that under the attraction of motor negative pressure, has a powerful impact force is impacted into tiny oil droplet with the machine oil of vaporizer adpting flange 5 the insides; And these tiny oil droplets with combustion gas mixing together, forms inflammable mixture; Inflammable mixture gets in the cylinder body 12 through the intake duct on the cylinder body 12 and to motor fuel is provided.

Three air flues are arranged on the cylinder body 12 of two-stroke gas motor, i.e. intake duct, air outlet flue and scavenging air belt, these three air flues are being closed by piston certain respectively constantly.Its work cycle comprises two strokes:

1. first stroke: piston 14 moves up from lower dead center, after three air flues are closed simultaneously, get into the combustion gas of cylinder and the inflammable mixture of machine oil and is compressed; When intake duct exposed, the inflammable mixture of combustion gas and machine oil flowed into crankcase.

2. second stroke: when piston 14 was compressed near the top dead center, spark plug 13 was lighted the inflammable mixture of combustion gas and machine oil, and the combustion gas promotion piston 14 that expands moves down work done.At this moment intake duct is closed, and the inflammable mixture that is enclosed in the crankcase 18 is compressed; When piston during near lower dead center air outlet flue open, waste gas is gone out; Scavenging air belt is opened subsequently, and the inflammable mixture of preloading is driven away waste gas towards people's cylinder, and waste gas is discharged through silencing apparatus 6, carries out gas exchange process.

The lubricating structure working principle is:

Bent axle scroll bar 7 is assemblied on the bent axle 15; With 8 engagements of oil pump turbine; Bent axle 15 drives oil pump 11 work when engine running; The machine oil that is contained in oil bottle 16 gets into vaporizer adpting flange 5 through transport pipe 9, oil pump 11, fuel supply line 3, at this, gets into crankcase with the combustion gas mixing atomizing.Unnecessary machine oil flows into oil bottle 16 through return tube 10 again.The rotating speed of motor is different, and the rotating speed of oil pump 11 is also different, so the machine oil fuel delivery is also different, thereby has reached the requirement by the demand supplying lubricating oil.

Fuel tube 2 is through the heat radiation window of motor front among the embodiment one, and the heat of engine producing blows on the fuel tube 2, accomplishes the warm to combustion gas; Use reduction valve that the low temperature high pressure gas that portable gas bottle 1 comes out is reduced pressure among the embodiment two, make combustion gas become the fuel of suitable engine operation.

Claims

1. small-sized two-stroke gas motor; Comprise cylinder body (12), crankcase body (18), vaporizer (4) and portable cylinder (1); Portable cylinder (1) is fixed on the crankcase (18), and cylinder body is provided with the firing chamber in (12), and portable cylinder (1) is connected through fuel tube (2) with vaporizer (4); It is characterized in that: said small-sized two-stroke gas motor is provided with the oil lubricating system; The oil lubricating system comprises oil bottle (16), oil pump (11), oil pump turbine (8), bent axle scroll bar (7), fuel supply line (3), transport pipe (9), return tube (10) and vaporizer adpting flange (5); Oil bottle (16), oil pump (11) are installed on the engine crankshaft casing (18), vaporizer adpting flange (5) is installed on the engine cylinder-body (12); Bent axle scroll bar (7) is assemblied on the bent axle (15); Mesh with oil pump turbine (8); Oil bottle (16) is connected through transport pipe (9) with oil pump (11), and oil pump (11) is connected through fuel supply line (3) with vaporizer adpting flange (5), is provided with return tube (10) between oil pump (11) and the oil bottle (16).

2. small-sized two-stroke gas motor according to claim 1 is characterized in that: fuel tube (2) is provided with reduction valve (17).