阅读说明：本技术 一种泄油式全可变泵控制系统 (Oil drainage type fully-variable pump control system ) 是由 汤晓磊 许仲秋 刘光明 佘笑梅 于 2021-07-20 设计创作，主要内容包括：本发明提供了一种泄油式全可变泵控制系统,包括变量泵、泵出口、主油道、油底壳、比例阀；所述变量泵包括泵体、旋转销、变量滑块、变量弹簧,变量滑块的外周面与泵体空腔内壁面之间设有互不相通的平衡腔和反馈腔,平衡腔和反馈腔分列于旋转销的左右两边,平衡腔和变量弹簧位于变量滑块的同一侧；比例阀设有P口、T口、A1口、A2口,其中P口通过油路与泵出口或主油道相通,T口通过油路与油底壳相通,A1口通过油路与变量泵的平衡腔相通,A2口通过油路与变量泵的反馈腔相通；在未变量阶段,ECU控制比例阀的P口与A1口连通,A2口与T口连通,在变量阶段,ECU控制比例阀的P口与A2口连通,A1口与T口连通。上述技术方案能够避免机油泵提前变量。(The invention provides an oil drainage type fully variable pump control system, which comprises a variable pump, a pump outlet, a main oil gallery, an oil pan and a proportional valve, wherein the variable pump is connected with the pump outlet; the variable pump comprises a pump body, a rotating pin, a variable slider and a variable spring, wherein a balance cavity and a feedback cavity which are not communicated with each other are arranged between the peripheral surface of the variable slider and the inner wall surface of a cavity of the pump body, the balance cavity and the feedback cavity are respectively arranged on the left side and the right side of the rotating pin, and the balance cavity and the variable spring are positioned on the same side of the variable slider; the proportional valve is provided with a port P, a port T, a port A1 and a port A2, wherein the port P is communicated with a pump outlet or a main oil gallery through an oil way, the port T is communicated with an oil pan through an oil way, the port A1 is communicated with a balance cavity of the variable pump through an oil way, and the port A2 is communicated with a feedback cavity of the variable pump through an oil way; in the non-variable stage, the P port of the ECU controlled proportional valve is communicated with the A1 port, the A2 port is communicated with the T port, in the variable stage, the P port of the ECU controlled proportional valve is communicated with the A2 port, and the A1 port is communicated with the T port. The technical scheme can avoid the advance variable of the oil pump.)

1. The utility model provides a full variable pump control system of draining formula which characterized in that: comprises a variable pump (1), a pump outlet (2), a main oil gallery (3), an oil pan (4) and a proportional valve (5); the variable pump comprises a pump body (11), a rotating pin (12), a variable slider (13) and a variable spring (14), wherein the variable slider (13) is arranged in a cavity of the pump body (11) and can swing left and right around the rotating pin (12), a rotor cavity for accommodating a rotor and a blade is arranged in the middle of the variable slider (13), a balance cavity (15) and a feedback cavity (16) which are not communicated with each other are arranged between the peripheral surface of the variable slider (13) and the inner wall surface of the cavity of the pump body (11), the balance cavity (15) and the feedback cavity (16) are respectively arranged on the left side and the right side of the rotating pin (12), and the balance cavity (15) and the variable spring (14) are positioned on the same side of the variable slider (13); the proportional valve is provided with a port P, a port T, a port A1 and a port A2, wherein the port P is communicated with a pump outlet (2) or a main oil gallery (3) through an oil way, the port T is communicated with an oil pan (4) through an oil way, the port A1 is communicated with a balance cavity (15) of the variable pump through an oil way, and the port A2 is communicated with a feedback cavity (16) of the variable pump through an oil way; in the non-variable stage, the P port of the ECU controlled proportional valve is communicated with the A1 port, the A2 port is communicated with the T port, in the variable stage, the P port of the ECU controlled proportional valve is communicated with the A2 port, and the A1 port is communicated with the T port.

2. The oil drainage type fully variable pump control system according to claim 1, characterized in that: the proportional valve (5) comprises a valve body (51), a plunger (52), a spring (53) and a screw plug (54), a valve hole for accommodating the plunger (52) and the spring (53) is formed in the valve body (51), the T port, the A1 port and the A2 port are formed in the valve body (51) and communicated with the valve hole, and the P port is formed in the screw plug (54); a first annular oil groove (55) and a second annular oil groove (56) are formed in the outer peripheral surface of the plunger (52), a radial hole (57) communicated with the second annular oil groove (56) is further formed in the plunger (52), and an axial hole (58) communicated with the radial hole (57) is further formed in the middle of the plunger (52); in the non-variable stage, the P port of the proportional valve (5) is communicated with the A1 port through a valve hole, and the A2 port is communicated with the T port through a first annular oil groove (55) of the plunger; in the variable stage, the P port of the proportional valve (5) is communicated with the port A2 through an axial hole (58), a radial hole (57) and a second annular oil groove (56) of the plunger in sequence, and the port A1 is communicated with the port T through a first annular oil groove (55) of the plunger.

3. The oil drainage type fully variable pump control system according to claim 2, characterized in that: the periphery of the plunger (52) is designed in equal proportion.

4. The oil drainage type fully variable pump control system according to claim 2, characterized in that: the periphery of valve body (51) is equipped with two annular grooves between three hydraulic fluid ports (5) of T mouth, A1 mouth and A2 mouth, is equipped with sealing washer (59) in every annular groove, sealing washer (59) are used for cutting off between the hydraulic fluid port of difference.

Technical Field

The invention relates to a lubricating system of an internal combustion engine, in particular to a control system based on a variable displacement pump.

Background

The existing control system based on the variable displacement pump generally adopts a single-cavity feedback oil pump, because the oil pressure in a rotor cavity is easy to leak into the feedback cavity through the end surface of a variable slider, the oil pump is easy to carry out variable in advance, and the traditional solution is to arrange an oil guide groove to introduce the leaked oil pressure into an oil inlet cavity.

Disclosure of Invention

The invention aims to provide an oil drainage type fully variable pump control system, which avoids advanced variation of an oil pump.

In order to solve the technical problems, the technical scheme of the invention is as follows: an oil drainage type fully variable pump control system comprises a variable pump, a pump outlet, a main oil gallery, an oil pan and a proportional valve; the variable pump comprises a pump body, a rotating pin, a variable slider and a variable spring, wherein the variable slider is arranged in a cavity of the pump body and can swing left and right around the rotating pin; the proportional valve is provided with a port P, a port T, a port A1 and a port A2, wherein the port P is communicated with a pump outlet or a main oil gallery through an oil way, the port T is communicated with an oil pan through an oil way, the port A1 is communicated with a balance cavity of the variable pump through an oil way, and the port A2 is communicated with a feedback cavity of the variable pump through an oil way; in the non-variable stage, the P port of the ECU controlled proportional valve is communicated with the A1 port, the A2 port is communicated with the T port, in the variable stage, the P port of the ECU controlled proportional valve is communicated with the A2 port, and the A1 port is communicated with the T port.

In the technical scheme, the port P of the proportional valve is communicated with the pump outlet or the main oil passage through an oil passage, the port T is communicated with the oil pan through the oil passage, the port A1 is communicated with a balance cavity of the variable pump through the oil passage, and the port A2 is communicated with a feedback cavity of the variable pump through the oil passage; therefore, in the non-variable stage, the pressure oil of the main oil passage flows into the balance cavity through the P port and the A1 port, the pressure oil in the feedback cavity is discharged to the oil pan through the A2 port and the T port, and the pressure in the feedback cavity is always zero, so that the problem of variable advance is not caused at all; in the variable stage, pressure oil in the balance cavity is drained to the oil sump through the port A1 and the port T, and pressure oil in the main oil gallery flows into the feedback cavity through the port P and the port A2 to push the variable slider to deflect towards the variable spring side, so that the displacement of the oil pump is reduced.

In one embodiment, the proportional valve comprises a valve body, a plunger, a spring and a screw plug, a valve hole for accommodating the plunger and the spring is arranged in the valve body, the T port, the A1 port and the A2 port are arranged on the valve body and communicated with the valve hole, and the P port is arranged on the screw plug; the outer peripheral surface of the plunger is provided with a first annular oil groove and a second annular oil groove, the plunger is further provided with a radial hole communicated with the second annular oil groove, and the middle of the plunger is further provided with an axial hole communicated with the radial hole; in the non-variable stage, the P port of the proportional valve is communicated with the A1 port through the valve hole, and the A2 port is communicated with the T port through the first annular oil groove of the plunger; in the variable stage, the port P of the proportional valve is communicated with the port A2 through the axial hole, the radial hole and the second annular oil groove of the plunger in sequence, and the port A1 is communicated with the port T through the first annular oil groove of the plunger.

In one embodiment, the outer periphery of the plunger is of equal proportion design.

In one embodiment, two annular grooves are formed in the periphery of the valve body among three oil ports of the T port, the A1 port and the A2 port, and a sealing ring is arranged in each annular groove and used for separating different oil ports.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a control system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a variable displacement pump according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a proportional valve in an embodiment of the present invention in an undeformed state;

FIG. 4 is a schematic diagram of a proportional valve in an embodiment of the present invention in a variable state;

the reference signs are:

1-variable pump 2-pump outlet 3-main oil gallery

4-oil bottom shell 5-proportional valve 11-pump body

12-rotating pin 13-variable slide block 14-variable spring

15-balance chamber 16-feedback chamber 51-valve body

52-plunger 53-spring 54-screw plug

55-first annular oil groove 56-second annular oil groove 57-radial hole

58-axial hole 59-sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

As shown in fig. 1 to 4, the preferred embodiment of the present invention is: an oil drainage type fully variable pump control system comprises a variable pump 1, a pump outlet 2, a main oil gallery 3, an oil pan 4 and a proportional valve 5; the variable pump comprises a pump body 11, a rotating pin 12, a variable slider 13 and a variable spring 14, wherein the variable slider 13 is arranged in a cavity of the pump body 11 and can swing left and right around the rotating pin 12, a rotor cavity for accommodating a rotor and a blade is arranged in the middle of the variable slider 13, a balance cavity 15 and a feedback cavity 16 which are not communicated with each other are arranged between the peripheral surface of the variable slider 13 and the inner wall surface of the cavity of the pump body 11, the balance cavity 15 and the feedback cavity 16 are respectively arranged at the left side and the right side of the rotating pin 12, and the balance cavity 15 and the variable spring 14 are positioned at the same side of the variable slider 13; the proportional valve 5 is provided with a port P, a port T, a port A1 and a port A2, wherein the port P is communicated with a pump outlet 2 or a main oil gallery 3 through an oil path, the port T is communicated with an oil pan 4 through an oil path, the port A1 is communicated with a balance cavity 15 of the variable pump through an oil path, and the port A2 is communicated with a feedback cavity 16 of the variable pump through an oil path; in the non-variable stage, the port P of the ECU controlled proportional valve 5 is communicated with the port A1, the port A2 is communicated with the port T, in the variable stage, the port P of the ECU controlled proportional valve 5 is communicated with the port A2, and the port A1 is communicated with the port T.

As shown in fig. 3 and 4, the proportional valve 5 comprises a valve body 51, a plunger 52, a spring 53 and a screw plug 54, wherein a valve hole for accommodating the plunger 52 and the spring 53 is arranged in the valve body 51, the periphery of the plunger 52 is designed in equal proportion, the T port, the a1 port and the a2 port are arranged on the valve body 51 and communicated with the valve hole, and the P port is arranged on the screw plug 53; the outer peripheral surface of the plunger 52 is provided with a first annular oil groove 55 and a second annular oil groove 56, the plunger 52 is also provided with a radial hole 57 communicated with the second annular oil groove 56, and the middle of the plunger 52 is also provided with an axial hole 58 communicated with the radial hole 57; in the non-variable stage, the port P of the proportional valve 5 is communicated with the port A1 through a valve hole, and the port A2 is communicated with the port T through the first annular oil groove 55 of the plunger 52; in the variable stage, the port P of the proportional valve 5 is communicated with the port A2 through the axial hole 58, the radial hole 57 and the second annular oil groove 56 of the plunger in sequence, and the port A1 is communicated with the port T through the first annular oil groove 55 of the plunger; two annular grooves are formed in the periphery of the valve body 51 among the three oil ports of the T port, the A1 port and the A2 port, a sealing ring 59 is arranged in each annular groove, and the sealing rings 59 are used for separating different oil ports.

Because the port P of the proportional valve 5 is communicated with the pump outlet 2 or the main oil gallery 3 through an oil path, the port T is communicated with the oil pan 4 through an oil path, the port A1 is communicated with the balance cavity 15 of the variable pump through an oil path, and the port A2 is communicated with the feedback cavity 16 of the variable pump through an oil path; in this way, in the non-variable stage, the pressure oil in the main oil gallery 3 flows into the balance cavity 15 through the port P and the port A1, the pressure oil in the feedback cavity 16 leaks to the oil pan 4 through the port A2 and the port T, and the pressure in the feedback cavity is always zero, so that the problem of variable advance does not exist at all; in the variable stage, the pressure oil in the balance cavity 15 is discharged to the oil pan 4 through the port a1 and the port T, and the pressure oil in the main oil gallery 3 flows into the feedback cavity 16 through the port P and the port a2, so that the variable slider 13 is pushed to deflect towards the variable spring 14 side, and the displacement of the oil pump is reduced.

The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit and scope of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.