CN2272949Y

CN2272949Y - Two-stroke cycle gasoline engine

Info

Publication number: CN2272949Y
Application number: CN 96228348
Authority: CN
Inventors: 刘治利
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-22
Filing date: 1996-07-22
Publication date: 1998-01-21
Anticipated expiration: 2006-07-22

Abstract

The utility model provides a two-stroke cycle gasoline engine, which is formed by the way that an air inlet pipe is increased in a mixture supply system of a crankcase reed valve type air inlet two-stroke engine. The air inlet pipe is communicated with an air cleaner and a scavenging port, the air inlet pipe and a mixture gas inlet pipe are connected in parallel, a throttle valve and a reed valve are arranged in the air inlet pipe, and a choke valve is arranged between the air inlet of the air inlet pipe and the air cleaner. The utility model has the advantages of large power, low oil consumption and little pollution of vent gas.

Description

A kind of novel two-stroke gasoline engine

The utility model relates to motor, especially a kind of two-stroke gasoline engine.

The two-stroke gasoline engine of prior art, be the waste gas after burning in the cylinder to be purged with the inflammable mixture in the crankcase, just incoming mixture is introduced into crankcase, when descent of piston, compressed inflammable mixture enters cylinder by scavenging port again in the crankcase, incoming mixture is by the effect of residual gas being extruded relief opening, so just exist the blending of inflammable mixture and waste gas inevitably, for realize staying residual gas less in the cylinder as far as possible, will inevitably some inflammable mixture without the burning work done just by outside the relief opening discharge machine, so cause power to descend, oil consumption is risen, and simultaneously, partially mixed gas is in waste gas blending process, generate outside the harmful matter discharge machine owing under the effect of anoxic and high-temp waste gas, decompose, thereby further increase the weight of and worsened the exhausting air pollution.

The purpose of this utility model provides the novel two-stroke gasoline engine that a kind of power is big, oil consumption is low and the exhausting air pollution is little.

The purpose of this utility model can realize by following measure: increase air intake duct in the mixed gas supply system of crankcase Reed Valve formula air inlet two-stroke machine, this air intake duct is connected with air-strainer, scavenging port, and with the mixed gas suction tude and connect, closure and Reed Valve are arranged in the air intake duct.

The purpose of this utility model also can realize between air intake duct air intlet and air-strainer chock plate being arranged by following measure.

The utility model compared with prior art has following advantage:

1, simple in structure, cost is low, and working stability is reliable;

2, combustion efficiency height, power is big, and this machine has been owing to increased air intake duct, thereby realized the multi-cavity air inlet, because two pipes air feed have simultaneously improved scavenging efficiency.Simultaneously, after fuel and air secondary were mixed, mixed gas atomizing quality better helped smooth combustion, thereby has improved the power of motor, and reduced the content of harmful in the exhausting air;

3, because scavenging is to utilize pure air that the waste gas in the cylinder is purged in earlier stage, the direct loss of generation have improved the utilization ratio of fuel and have saved oil consumption with regard to the discharge body is outer without work done thereby controlled inflammable mixture;

4, realized layered scavenging, the multi-cavity air inlet.

Fig. 1 is a structural representation of the present utility model.

Wherein: 1-air-strainer, 2-chock plate, 3-air intake duct, 4-closure, 5-spring valve, 6-cylinder cap, 7-spark plug, 8-piston, 9-cylinder, 10-cylinder sleeve, 11-relief opening, 12-connecting rod, 13-bent axle, 14-crankcase, 15-scavenging port, 16-air inlet scavenging air belt, 17-mixed gas suction tude, 18-Reed Valve, 19-Carburetor, 20-closure.

With reference to the accompanying drawings working principle of the present utility model is described further:

When piston 8 by lower dead center when top dead center moves, it is big that volume in the crankcase 14 becomes, pressure diminishes, when being lower than external atmospheric pressure, Reed Valve 5,18 in air intake duct 3 and the mixed gas suction tude 17 is inhaled simultaneously and is opened, from the inflammable mixture of Carburetor 19 with from the pure air of air intake duct 3 through air inlet scavenging air belt 16 fully mix again and form that strong eddy current unites two into one enter crankcase 14, like this, fuel oil is fully atomizing further, help smooth combustion, improve efficient, reduced pollution.

When piston 8 was moved down by top dead center, the volumes in the crankcase 14 diminished, and pressure rises, and two Reed Valves 5,18 are closed simultaneously automatically, and this moment, existing between air intake duct 3 and the mixed gas suction tude 17 did not have mixed pure air in air inlet scavenging air belt 16.Piston 8 continues descending, relief opening 11 is opened, high pressure exhaust gas is discharged automatically, cylinder 9 internal pressures are reduced, scavenging port 15 is open in succession, and compressed live gas enters cylinder 9 through scavenging port 15 in the crankcase 14, and what at first enter cylinder 9 is not have mixed pure air in air inlet scavenging air belt 16 upper ends, its waste gas in cylinder 9 carries out blending and purges outside the back discharge machine, has realized layered scavenging like this.Therefore, fundamentally solved the work done of fuel unburned and the blending that produces loss, thereby improved the utilization ratio of fuel, also reduced the harmful components in the waste gas simultaneously, reduced the exhaust emission value,, finished whole scavenging process along with the continuation of piston 8 motions.

Claims

1, a kind of novel two-stroke gasoline engine, the mixed gas supply system that comprises crankcase Reed Valve formula air inlet two-stroke machine, the air intake duct (3) that it is characterized in that and be connected in mixed gas suction tude (17) is connected with air-strainer (1), scavenging port (15), and closure (4) and Reed Valve (5) are arranged in the air intake duct (3).

2, a kind of novel two-stroke gasoline engine according to claim 1 is characterized in that between air intake duct (3) air intlet and air-strainer (1) chock plate (2) being arranged.