CN200961547Y - Intake concentrator of gasoline engine - Google Patents

Abstract

The utility model discloses an air inlet concentrator of the petrol engine, comprising an air inlet pipe, a connection head having a spraying hole, a connection pipe and a cumulative cavity; wherein the volume of the cumulative cavity is 0.7 to 1.6 times as much as the displacement of the engine, the inner diameter of the connection pipe is phi6 to phi12mm, the length of the connection pipe is 90 to 600mm, and the aperture of the spraying hole of the connection head is phi2 to phi5mm. The utility model has simple structure and small connection caliber. Under the situation of not modifying the engine, the utility model improves the charging efficiency and the oil-gas mixed quality, and under the operation of excessively accelerating or decelerating, the utility model can timely adjust the air-fuel ratio of the mixed gas, thereby improving power, oil consumption, discharging and accelerating capabilities of the engine in the range of the whole operation and playing a role of cumulating. The utility model is applicable for all the motorcycle engines which have 600ml below displacement and employ the carburetor mode. The power torque can be enhanced by 5 to 10%, the oil consumption can be reduced by 10% above, and the discharging of the tail gas can be decreased by 20% above.

Description

Gasoline engine inlet-air energy-gathering device

Technical field

The utility model belongs to the petrol engine technical field, specifically, relates to a kind of gasoline engine inlet-air energy-gathering device.

Background technique

At present, petrol engine is in service in work: 1, along with the motion of piston and valve, mixed gas fluid between Carburetor and cylinder head in the suction tude is violent pressure oscillations and the state of the pulsation that recoils back and forth, according to the flow of pulsating fluid necessarily less than the attribute of voltage stabilizing fluid, weaken the charging efficiency of motor largely, limited effective performance of engine power thus.2, the oil slick thickness set up on the suction tude tube wall of fuel oil is along with variations such as the flow velocity of mixed gas fluid, pressure, temperature and change, this oil slick thickness keeps dynamic steady state during steady working condition, but when variable working condition is is particularly added and subtracted throttle, the variation of air flue fluid pressure is ahead of engine speed, variation of temperature, the dynamic steady state of this oil slick thickness will be broken, and lean out influences acceleration when causing open out, waste fuel oil and discharging variation thicken when subtracting throttle.The gasoline air mixture ratio that this variable working condition exists is down crossed rare or the overrich problem, can be observed checking when the behavior method discharging test of Carburetor motorcycle.

Once there were some to set up the design of resonant cavity or power increasing device in the motorcycle engine gas handling system before this, as Chinese patent ZL 03209364.0 (notification number is CN 2641306) in disclosed a kind of motorcycle air inlet resonator on September 15th, 2004, this air inlet resonator is communicated with successively by suction tude, connecting head, connecting tube resonant cavity and forms, the caliber of connecting tube is the 50-70% of suction tude caliber, the length of connecting tube is 20-30 times of suction tude caliber, the internal diameter size of connecting head equates with the connecting tube caliber that roughly the volume of resonant cavity is 0.5-1.5L.This design is unilateral from improving the angle of motor peak power moment of torsion, adopts bigger resonant cavity volume and passage bore thereof.Though can improve motor peak power and moment of torsion like this, but only be applicable to the indivedual operating modes under the high rotating speed of full throttle, it has also brought the problem of startability, acceleration performance and the deterioration of middle low speed torque of motor simultaneously, and the serious phenomenon of blowing out especially very easily takes place when subtracting throttle.Behind current high environmental protection emission request Carburetor matching optimization, these negative effects more very.So these designs all fail to obtain effective practical application.In addition, some designs such as electrically controlled gas supplementing device etc. are arranged also, because of cost height, fault point increase, to causes such as motor and Carburetor coherence request height, its sizable application is restricted.

The model utility content

It is a kind of under the prerequisite of not sacrificing petrol engine startability, acceleration performance and low speed torque that technical problem to be solved in the utility model is to provide, can stabilize the gasoline engine inlet-air energy-gathering device of suction tude internal pressure pulsation spike, raising charging efficiency, reduce oil consumption to increase power, and under the acceleration and deceleration dynamic operation condition, the gasoline air mixture ratio that enters cylinder is carried out follow-up adjustment, with the unfavorable factor that this variation that remedies oil slick thickness brings, improve petrolic acceleration performance and exhaust emissions.

The technical solution of the utility model is as follows: a kind of gasoline engine inlet-air energy-gathering device, the connecting head, connecting tube and the cumulative chamber that comprise suction tude, band spray orifice, its key is: the volume in described cumulative chamber is 0.7-1.6 a times of engine displacement, the internal diameter of connecting tube is φ 6-φ 12mm, length is 90-600mm, and the spray orifice aperture of connecting head is φ 2-φ 5mm.

Connection between each parts of the utility model is same as the prior art, and promptly suction tude, connecting head, connecting tube and cumulative chamber communicate successively.During use, concussion along with mixture pressure in the suction tude, when the spray orifice mouth pressure is lower than the cumulative cavity pressure in the suction tude, intracavity gas is jet in suction tude by connecting tube and spray orifice, otherwise the cumulative chamber is air-breathing from suction tude, has stabilized the pressure oscillations spike in the suction tude thus as far as possible and slows down and come the back reflective pulsation, improve charging efficiency, improve engine power and moment of torsion.Under dynamic operation condition, at the initial stage when open out, it is big that the suction tude internal pressure becomes, and the cumulative chamber is air-breathing further to become big to slow down pressure, alleviated thus that to thicken the mixed gas that causes rare partially because of the air flue oil film.At initial stage when subtracting throttle, the suction tude internal pressure negative pressure that diminishes increases suddenly, and the cumulative chamber is jet to suction tude, has slowed down that to be taken away the mixed gas that causes dense partially because of the air flue oil film.Simultaneously, the spray orifice of connecting head adopts the aperture of φ 2-φ 5mm size, along with the ejection or the suction of cumulative intracavity gas, also the mixed gas in the suction tude has been played the flow-disturbing effect, has improved the mixing and burning quality of oil gas.Through match test, the volume in cumulative chamber be engine displacement 0.7-1.6 doubly, too small then DeGrain is excessively then easily blown out; The connecting tube internal diameter is φ 6-φ 12mm, and length is 90-600mm, too small then DeGrain, excessive then can be to quickening and startability have a negative impact.

Characteristics such as beneficial effect: the utlity model has simple and ingenious structure, it is obvious that engine performance is improved effect, and the reliability height is convenient to install and is adjusted, and is cheap for manufacturing cost.By adopting the principle in air inlet cumulative chamber, choose reasonable cumulative chamber volume, spray orifice aperture and be connected caliber are under the situation that engine design does not make improvements, stabilize the mixture pressure concussion in the suction tude, increase aeration quantity and intake efficiency, disturbance oil gas mixes, and improves mixed effect; Follow-up adjustment is optimized the gasoline air mixture ratio under the acceleration and deceleration operating mode, thereby improves power, oil consumption, discharging and the acceleration performance of motor in full operating mode scope, has played cumulative action.Through test, the power moment of torsion can improve 5-10%, and oil consumption can reduce more than 10%, and exhaust emissions can reduce more than 20%.

The utility model is applicable to that following all of 600ml discharge capacity adopt the motorcycle engine of Carburetor mode fuel feeding.

Description of drawings

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

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1, the utility model is made of the parts such as connecting head 4, connecting tube 5 and cumulative chamber 7 of suction tude 2, band spray orifice, wherein two of suction tude 2 is connected with engine cylinder head 3 with Carburetor 1 respectively, and the oil-gas mixer in the Carburetor 1 can be entered in the engine cylinder head 3 by suction tude 2.Have by-pass hole on the wall of suction tude 2, the connecting head 4 of band spray orifice is installed in this by-pass hole; Described cumulative chamber 7 is installed on one's body motor or the motorcycle, connect with connecting tube 5 between cumulative chamber 7 and the connecting head 4, the two ends of connecting tube 5 with pipe clamp 6 chuckings with anti-gas-leak.Wherein, the volume in cumulative chamber 7 is 0.7-1.6 a times of engine displacement, and the internal diameter of connecting tube 5 is φ 6-φ 12mm, and connecting tube 5 length are 90-600mm, and the spray orifice aperture of connecting head 4 is φ 2-φ 5mm.

Claims (1)

1, a kind of gasoline engine inlet-air energy-gathering device, the connecting head (4), connecting tube (5) and cumulative chamber (7) that comprise suction tude (2), band spray orifice, it is characterized in that: the volume in described cumulative chamber (7) is 0.7-1.6 a times of engine displacement, the internal diameter of connecting tube (5) is φ 6-φ 12mm, length is 90-600mm, and the spray orifice aperture of connecting head (4) is φ 2-φ 5mm.

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