CN2494432Y - LPG engine with evaporation pressure adjuster - Google Patents

Abstract

The utility model relates to an LPG engine with a vaporizer/pressure regulator, which is exclusively used for vehicle models of motorcycles, boosted vehicles, wheel chairs with three wheels, etc. The LPG engine comprises an engine cylinder end cover (1) and the vaporizer/pressure regulator connected with the engine cylinder end cover (1). The utility model is characterized in that a row of LPG pipelines (2) are arranged in the engine cylinder end cover (1); an outlet on one end of the pipeline (2) is communicated with an air inlet (12) of the vaporizer/pressure regulator. The pressure regulator is composed of a primary chamber (4a), a pressure reducing valve (10), an air flow regulating valve (9) and a secondary chamber (4b) which are successively communicated via gas pipelines. In order to ensure the engine to work normally at any climatic conditions, a group of semiconductor exothermic material (3) are arranged beside pipelines (2) in the engine cylinder head cover (1). Thus, the heated LPG goes into the vaporizer/pressure regulator, is vaporized, gasified and reduced with pressure, and goes into the engine via a mixer so as to ensure that the engine can gradually gather speed from the idle speed state to the constant-speed running state. Thereby, the performance of the whole vehicle is improved.

Description

The liquified petroleum gas engine of band evaporation pressure regulator

The utility model relates to a kind of LPG liquified petroleum gas engine, especially has the liquid phase special engine of evaporation pressure regulator.

Now, along with people to the improving constantly of environmental protection requirement, use on the referred important agenda of green energy resource.Liquefied petroleum gas (LPG) (LPG) is being subjected to people's generally favor as a kind of fuel of clean and effective, and has been applied on the various internal-combustion engines.But because the component characteristic of LPG is different from the gasoline of the various trades mark, adopt the gas phase liquefied petroleum gas (LPG) to be applied on the motor-helping car at present, just can not reach good work condition state, and then have influence on the performance of car load.

The purpose of this utility model is will provide a kind of liquid LPG can be changed into the evaporation pressure regulator of gaseous state, thereby makes the function of starting that has this pressure governor reach good running state.

The purpose of this utility model is achieved in that and is provided with a discharge opeing attitude liquefied petroleum gas pipeline 2 that in engine cylinder skull 1 liquefied gas pipeline 2 one brings out a mouthful suction port 12 that connects evaporation pressure regulator in the cylinder head cover 1.

For the ease of the petroleum liquid LNG gasifaction, on the technique scheme basis, there is one group of semiconductor heater element 3 on cylinder head cover 1 interior conduit 2 sides.

Wherein, described pressure governor is made up of the chamber 4a, reduction valve 10, air volume regulating valve 9, the 4b of secondary chamber that are located in the housing, and each device is communicated with by pipeline successively.Its working principle is, after in the liquid LPG input engine cylinder skull 1, enter evaporation pressure regulator through heating, liquid LPG enters the 4b of secondary chamber after reducing pressure via a chamber 4a, after making liquid LPG evaporation gasification and decompression, enter motor by mixer, evaporation pressure regulator can have the negative feedback closed loop system, by the flow of LPG such as control such as air volume regulating valve 9 grades, to guarantee that motor accelerates to the constant-speed operation state gradually by idling mode.

Owing to adopt such scheme, liquid LPG converts gas phase to through engine cylinder head, evaporation pressure regulator successively, feeds back to motor again, thereby has guaranteed the constant-speed operation of motor, has improved vehicle performance, has reached Expected Results.Be applicable to vehicles such as motorcycle, motor-helping car, tricycle for disabled people.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is external form figure of the present utility model.

Fig. 2 is the A-A sectional drawing of Fig. 1.

Fig. 3 is a present embodiment evaporation pressure regulator sectional drawing.

Shown in the figure there be critical piece: cylinder head cover 1, lid interior conduit 2, heater element 3, chamber 4a, the 4b of secondary chamber, diaphragm 5a, 5b, 5c, magnet 6, electromagnetic coil 7, valve 8a, 8b, modulating valve 9, reduction valve 10, spring 11, suction port 12.

As Fig. 1 external form figure of the present utility model, Fig. 2 is shown in the A-A sectional drawing of Fig. 1, in engine cylinder skull 1, make a discharge opeing attitude liquefied petroleum gas fuel channel 2 with metal pipe, at pipeline 2 one ends semiconductor heater element 3 is arranged, when vehicle launch, start function under outdoor low temperature condition, to start fast.Conduction is enough to satisfy the liquid needs that heat of LPG in the pipeline 2 for the heat in the cylinder head cover 1 behind the engine start.Originally entering in the cylinder head cover 1 is liquid LPG, and that enter evaporation pressure regulator is liquid LPG through heating.

Shown in Fig. 3 present embodiment evaporation pressure regulator sectional drawing, LPG enters the 4b of secondary chamber through evaporation pressure regulator suction port 12 from chamber 4a, reduction valve 10, a modulating valve 9 in housing, isolate chamber 4a, the 4b of secondary chamber one time by diaphragm 5a, 5b, 5c, by electromagnetic valve structure as: magnet 6, electromagnetic coil 7, valve 8a, 8b, spring 11 control throughputs.In this evaporation pressure regulator, LPG enters the 4b of secondary chamber by pipeline 2 suction ports 12, and this moment, LPG was by reduction valve 10 decompressions.When a room pressure surpassed default force value, diaphragm 5c drove spring 11.Make valve 8b lever move control suction port 12.LPG arrives the 4b of secondary chamber through air volume regulating valve 9.The 4b of secondary chamber is connected with mixer, and mixer is positioned on the combination apparatus, and the air-flow, the pressure sensitive that produce when motor moved.Diaphragm 5a relies on the central mobile of this induction to evaporation pressure regulator, drives the lever displacement of valve 8a, and valve 8a is opened, and LPG flows to the 4b of secondary chamber through air volume regulating valve 9 from a chamber 4a.If the air-breathing increasing in the mixer, diaphragm 5a increases to central displacement, makes more LPG flow through air volume regulating valve 9.Otherwise if the air-breathing minimizing in the mixer, diaphragm 5b goes up and produces a back pressure, and the lever that drives valve 8a is to top offset, with the flow of restriction LPG; When motor did not turn round, spring 11 acted on the lever of valve 8a, to guarantee the tightness of air volume regulating valve 9.Behind engine start, spring 11 is compressed by diaphragm 5a, and the pressure that diaphragm 5a then forms because of suction port 12 falls it is compressed.Diaphragm 5a and magnet 6 are carved with a kind of attraction force always the time, make a large amount of gas stream mistakes of LPG.

This mechanism can make motor can both work under any weather conditions.Startup electromagnetic coil 7 is housed on the evaporation pressure regulator, when the normal startup of motor is unsuccessful, can be used as necessary emergency starting.

Claims (3)

1, a kind of liquified petroleum gas engine with evaporation pressure regulator, comprise engine cylinder skull (1) and the evaporation pressure regulator that is attached thereto, it is characterized in that: be provided with a discharge opeing attitude liquefied petroleum gas pipeline (2) in engine cylinder skull (1), pipeline (2) brings out mouth and is communicated with the suction port (12) of evaporation pressure regulator.

2, the liquified petroleum gas engine of band evaporation pressure regulator according to claim 1 is characterized in that: described pressure governor is communicated with successively by gas pipeline and is formed by the chamber (4a), reduction valve (10), air volume regulating valve (9), the secondary chamber (4b) that are located in the housing.

3, motor according to claim 1 is characterized in that: on engine cylinder skull (1) interior conduit (2) side one group of semiconductor heat generating material (3) is arranged.

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