CN2661929Y

CN2661929Y - Rotating type valve mechanism of four-stroke internal combustion engine

Info

Publication number: CN2661929Y
Application number: CN 200320114728
Authority: CN
Inventors: 傅洪海
Original assignee: Chongqing Zongshen Technology Development and Research Co Ltd
Current assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Priority date: 2003-10-01
Filing date: 2003-10-01
Publication date: 2004-12-08
Anticipated expiration: 2013-10-01

Abstract

The utility model relates to a valve actuating mechanism for four-stroke internal combustion engine, which comprises a valve and a cylindrical rotary valve plug which is arranged inside the valve; the valve is provided with an air intake and a through hole which is communicated with a combustion chamber; the valve plug is provided with an intake passage which can be communicated with the air intake and the through hole on the valve, and an exhaust passage which is communicated with the through hole; two openings of the intake passage are arranged on a cylindrical surface of the valve plug; the two openings of the exhaust passage are arranged on the cylindrical surface and a head face of the valve plug; when a charging stroke of the internal combustion engine is started, a connection gap is arranged between the opening of the exhaust passage of the cylindrical surface of the valve plug and the through hole of the valve, so that the scavenging can be implemented fully, the requirements of high-speed operation of the internal combustion engine can be satisfied.

Description

The rotary distribution device of quartastroke engine

Technical field

The utility model relates to a kind of distribution device of quartastroke engine.

Technical background

The principle of traditional four-stroke internal combustion engine distribution mechanism is basic identical, structure is also similar, generally comprise inlet and outlet door, valve guide bushing, valve spring, camshaft, rocking arm, timing sprocket (or timing gear), timing chain (or push rod) etc., the distribution device motion of this kind structure is impacted greatly, operating noise is big, the power in-fighting is big and the raising of restriction internal-combustion engine rotational speed.

The revolution axis type distribution device of Chu Xianing has solved the above-mentioned defective of traditional combustion engine distribution device to a great extent in recent years, as the patent No. is that 92104768.1 and 02209912.3 utility model patent discloses a kind of shaft type rotary valve train, Structure of Internal-Combustion Engine with this kind distribution device is simple, component are few, operate steadily and noise little.But the distribution device of this kind structure is in the rotary valve rotary course, and suitable phrase overlap is not carried out in air inlet and exhaust, and internal-combustion engine can not be realized sufficient scavenging, has restricted the high speed operation of internal-combustion engine to a certain extent.

The model utility content

Technical problem to be solved in the utility model provides the rotary distribution device of a kind of quartastroke engine, can realize abundant scavenging in the internal combustion engine operation process, to satisfy the requirement of internal-combustion engine high speed operation.

Distribution device described in the utility model comprises valve body and is positioned at the cylindrical body rotary spool of valve body, spool is parallel with bent axle and by the bent axle driven rotary, the through hole that on valve body, offers inlet hole and be communicated with the firing chamber, offering the gas-entered passageway that can be communicated with on the spool with inlet hole on the valve body and through hole, with the exhaust passage that is communicated with through hole, two openings of gas-entered passageway are positioned on the spool cylndrical surface, two openings of exhaust passage lay respectively on spool cylndrical surface and the end face, when the air-intake of combustion engine stroke began, there were a communication gap in the exhaust passage opening and the valve hole that are positioned on the spool cylndrical surface.

Gas-entered passageway on the spool in valve core along poppet shaft to oblique perforation, the exhaust passage is communicated with the spool axial bore by the spool radial hole and forms.

Distribution device described in the utility model is because when the air-intake of combustion engine stroke begins, also there are a communication gap in the exhaust passage opening and the valve hole that are positioned on the spool cylndrical surface, exhaust passage on the spool still is communicated with the firing chamber, suitable phrase overlap is carried out in air inlet and exhaust, the mixed gas that enters in the firing chamber can squeeze the firing chamber with the burning chamber waste gas in the moment that aspirating stroke begins, thereby the requirement of internal-combustion engine high speed operation has been satisfied in fully scavenging of reality.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 is the cross-sectional schematic of a kind of concrete structure of rotary distribution device described in the utility model;

Fig. 2 is the sectional view of spool in the distribution device;

The cross-sectional schematic of A-A line among Fig. 1 when Fig. 3 begins for aspirating stroke;

The cross-sectional schematic of A-A line among Fig. 1 when Fig. 4 is compression stroke;

The cross-sectional schematic of A-A line among Fig. 1 when Fig. 5 is expansion stroke;

The cross-sectional schematic of A-A line among Fig. 1 when Fig. 6 begins for exhaust stroke.

Embodiment

As Fig. 1, shown in Figure 2, the rotary distribution device of this quartastroke engine comprises valve body 3 and is positioned at the cylindrical body rotary spool 4 of valve body 3, spool 4 is a smooth step axle, parallel with bent axle and by bent axle by timing sprocket 1 driven rotary, the through hole 5 that on valve body 3, offers inlet hole 2 and be communicated with the firing chamber, offering the gas-entered passageway 11 that can be communicated with on the spool 4 with inlet hole 2 on the valve body 3 and through hole 5, gas-entered passageway 11 in spool 4 bodies along spool 4 axial oblique perforations, two opening 6,10 are positioned on spool 4 cylndrical surface, its split shed 6 can be connected with the inlet hole 2 on the valve body 3, and another opening 10 can be connected with the through hole 5 on the valve body 3; Offering the exhaust passage 8 that can be communicated with on the spool 4 with through hole 5 on the valve body 3, exhaust passage 8 is communicated with axial bore on being opened in spool 4 and forms by being opened in radial hole on the spool 4, two opening 7,9 lays respectively on spool 4 cylndrical surface and the end face, and opening 7 can be connected with the through hole 5 on the valve body 3.Extremely shown in Figure 5 as Fig. 3, when the air-intake of combustion engine stroke begins, there is a communication gap 12 in the exhaust passage opening 7 that is positioned on spool 4 cylndrical surface with valve body 3 through holes 5, exhaust passage 8 on the spool 4 still is communicated with the firing chamber, suitable phrase overlap is carried out in air inlet and exhaust, the mixed gas that enters in the firing chamber can squeeze the firing chamber with the burning chamber waste gas in the moment that aspirating stroke begins, thus fully scavenging of reality.

Claims

1, the rotary distribution device of a kind of quartastroke engine, comprise valve body (3) and be positioned at the cylindrical body rotary spool (4) of valve body, spool is parallel with bent axle and by the bent axle driven rotary, the through hole (5) that on valve body (3), offers inlet hole (2) and be communicated with the firing chamber, on spool (4), offer the gas-entered passageway (11) that can be communicated with last inlet hole (2) of valve body (3) and through hole (5), with the exhaust passage (8) that is communicated with through hole (5), it is characterized in that: two openings (6 of gas-entered passageway (11), 10) be positioned on the spool cylndrical surface, two openings (7 of exhaust passage (8), 9) lay respectively on spool cylndrical surface and the end face, when the air-intake of combustion engine stroke began, there was a communication gap (12) in the exhaust passage opening (7) that is positioned on the spool cylndrical surface with valve hole (5).

2, distribution device according to claim 1 is characterized in that: the gas-entered passageway on the spool in valve core along poppet shaft to oblique perforation, the exhaust passage is communicated with the spool axial bore by the spool radial hole and forms.