CN2390016Y

CN2390016Y - Intake device of flat suction single carburetter for 750 motorcycle

Info

Publication number: CN2390016Y
Application number: CN 99246562
Authority: CN
Inventors: 张敬国; 孙伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-24
Filing date: 1999-09-24
Publication date: 2000-08-02
Anticipated expiration: 2009-09-24

Abstract

The utility model provides an intake device of a single carburetor for a 750 motorcycle. The device is provided with a Y-shaped air inlet pipe between the carburetor and the air inlet of a cylinder, the air inlet pipe is provided with one air inlet and two connecting ports, and the middle part of the air inlet pipe is provided with a cylindrical rotational flow chamber. The device can be used for eliminating the phenomena of two cylinders which can not work synchronously due to two carburetors and improving the fuel economy of the motorcycle.

Description

750 motorcycle flat-absorpting type list carburetor air devices

The utility model relates to supply or its constituent element of general combustion engine ignition mixture, especially for the flat-absorpting type list carburetor air device of 750 motorcycles.

750 motorcycle prototype vehicles adopt the duplex carburettor air inlet system, and every cylinder uses a Carburetor, is directly installed on the cylinder body by thermal insulating pad, though compact structure, also there are many shortcomings in arrangement convenience, mainly shows: 1. the location arrangements of Carburetor is unreasonable.Because the Carburetor mounting point is very near from cylinder body; atomizing that the inflammable mixture that forms by Carburetor during air inlet does not come and abundant; just enter cylinder; because inflammable mixture is from being formed into the whole process time of burning short (high speed time＜0.01 second); fuel particles bigger in the inflammable mixture also is not able to do in time and air mixing, and combustion process just finishes, and causes fuel oil fully not burn; black smoke from exhaust, fuel economy descends.Simultaneously, burn, make motor send identical power, must strengthen the delivery volume of fuel oil, reduced fuel economy again owing to there being the part fuel oil can not participate in forming mixed gas.2. adopt the duplex carburettor fuel feeding that two cylinder workings are difficult to synchronously.750 motorcycles adopt two Carburetor fuel feeding, and this just involves the consistency problem of two cylinder workings.Because there is error during fabrication in Carburetor, add that the degree of wear of two Carburetors is also different at work, therefore, in the motor practical work process, two cylinders that are difficult to adjustment are all synchronous fully under various operating modes, and the power that two cylinders are produced does not at work wait like this, the generation phenomenon of disputing over trifles, influenced the normal performance of motorcycle power, fuel consumption increases, and Economy descends.Defective at the existence of 750 motorcycles, domestic many producers and engineers and technicians have done corresponding improvement design to it, have to adopt to make two Carburetors give a cylinder fuel feeding simultaneously connecting tube, also have and adopt vertical single Carburetor fuel feeding, all received effect preferably.But, adopt and connecting tube still can not eradicate the defective that had existed already; Adopt vertical Carburetor fuel feeding,, redesign, produce novel Carburetor, expend great amount of manpower, financial resources and material resources, cause economic loss, influenced the performance of whole economic efficiency though can tackle the problem at its root.

The purpose of this utility model provides the existing general Carburetor of a kind of employing, can solve the problem of motor two cylinder synchronous workings well, can also save 750 motorcycle flat-absorpting type list carburetor air devices of oil consumption.

For achieving the above object, the technical solution adopted in the utility model is as follows: these 750 motorcycle flat-absorpting type list carburetor air devices, comprise Carburetor, have the organ pipe that advances of " people " font between Carburetor and cylinder suction port, this suction tude has a suction port and two connection mouths.

In order to strengthen the gasification of fuel oil effect, have columniform eddy flow chamber at the middle part of suction tude.

After adopting above technological scheme, strengthened distance between Carburetor and cylinder body to strengthen fuel atomization effect.After distance between Carburetor and cylinder strengthens, prolonged time that inflammable mixture enters cylinder, make inflammable mixture before entering cylinder, having an opportunity to absorb heat from the external world further atomizes, also can make bigger fuel particles before entering cylinder, smashed by high velocity air, make the quality of inflammable mixture that further raising arranged, improved the fuel economy of motorcycle.Adopt a Carburetor fuel feeding, can eliminate because of two Carburetor foozles and adjust the improper two cylinder working asynchrony phenomenons that cause, and be convenient to adjust and safeguard.The strong eddy current that utilizes suction tude eddy flow chamber to be produced has further been strengthened the atomizing effect of fuel oil, reduces fuel consumption.Establish an eddy flow chamber at Carburetor and two suction tude joints, inflammable mixture from Carburetor is by tangentially entering the eddy flow chamber, form strong eddy current, bigger fuel particles is thrown to the eddy flow cavity wall in the mixed gas, form the very thin oil film of one deck, taken away by air-flow again after the oil film heat absorption evaporation, refinement fuel particles, improved mixed gas quality.Simultaneously,, played the effect of pneumatic supercharging, improved charging efficiency, increased engine output, reduced fuel consumption rate because the eddy flow chamber when not air inlet of cylinder, can utilize air-flow inertia to store a certain amount of inflammable mixture.

Further specify the utility model below in conjunction with drawings and Examples:

Fig. 1 is an an embodiment's of the present utility model structure principle chart;

Fig. 2 is the plan view of the suction tude among the embodiment of the utility model Fig. 1;

Fig. 3 is the plan view of the suction tude among the embodiment of the utility model Fig. 1.

As shown in Figure 1,750 motorcycle flat-absorpting type list carburetor air devices described in the utility model comprise Carburetor 1, have the suction tude 2 of " people " font between Carburetor 1 and cylinder suction port, and this suction tude 2 has a suction port and two connection mouths.Suction tude 2 is bolted to connection between two cylinders of motor, and two connection mouths are connected with the suction port of two cylinders respectively by flange plate 4, and the suction port of suction tude 2 is connected with the trunnion of Carburetor 1.As Fig. 2, shown in Figure 3, the middle part of suction tude 2 has columniform eddy flow chamber 3.

During work, the suction port of the mixed gas that is sucked by Carburetor 1 by suction tude 2 is by tangentially entering eddy flow chamber 3, form strong eddy current, bigger fuel particles is thrown to the eddy flow cavity wall in the mixed gas, forms the thin oil film of one deck, taken away by air-flow again after the oil film heat absorption evaporation, refinement fuel particles, simultaneously, the eddy flow of mixed gas further makes mixed gas mix more fully again, improve the quality of mixed gas, fallen at the end fuel consume.The work done of 750 motorcycle engines is 1-0-2-0 in proper order, promptly after the cylinder work done, change 180 ° of crank angles again, because the intake advance angle of 750 motorcycles and close the angle late and be respectively 76 ° and 92 °, so can not produce two cylinder air inlet overlapping phenomenons, that is to say that a cylinder air inlet can not influence another cylinder.Owing to be provided with eddy flow chamber 3, when not air inlet of cylinder, can utilize air-flow inertia to store a certain amount of inflammable mixture, played the effect of pneumatic supercharging, improved charging efficiency, increased the output power of motor, fuel consume has fallen at the end.

When reality is used, can use the higher used Carburetor of homemade minicar of class to replace the former carburetor side of 750 motorcycles, this Carburetor Perfect in shape and function, existing startup enrichment-system, accelerating unit, vacuum controlled economizer and antiafterburn valve are arranged again, and be the twin-choke structure, outroaring the pipe diameter is 25 millimeters, basic identical with 750 motorcycle carburetors, just idle metering jet, primary air metering-orifice and main jet and 750 motorcycles have discrepancy slightly, as long as do suitably to adjust according to the concrete condition of 750 motorcycles, just can satisfy usage requirement.

Claims

1, a kind of 750 motorcycle flat-absorpting type list carburetor air devices comprise Carburetor (1), and it is characterized in that: have the suction tude (2) of " people " font between Carburetor (1) and cylinder suction port, this suction tude (2) has a suction port and two connection mouths.

2,750 motorcycle flat-absorpting type list carburetor air devices according to claim 1, it is characterized in that: the middle part of suction tude (2) has columniform eddy flow chamber (3).