CN104100825A - Engine oil pump with variable displacement - Google Patents
Engine oil pump with variable displacement Download PDFInfo
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- CN104100825A CN104100825A CN201310117004.3A CN201310117004A CN104100825A CN 104100825 A CN104100825 A CN 104100825A CN 201310117004 A CN201310117004 A CN 201310117004A CN 104100825 A CN104100825 A CN 104100825A
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Abstract
The invention discloses an engine oil pump with a variable displacement. The engine oil pump comprises an engine oil pump body which comprises an eccentric ring, a first chamber, a second chamber, a first throttling port and a second throttling port, wherein the first chamber and the second chamber are separated, the first chamber is communicated with an outlet oil passage of the engine oil pump, the first throttling port is connected with an inlet of the second chamber, and the second throttling port is connected with an outlet of the second chamber; when the oil pressure of the outlet oil passage is greater than a first pressure threshold, the internal oil pressure of the first chamber can force the eccentric ring to push towards the direction capable of reducing the displacement of the engine oil pump; when the oil pressure of the outlet oil passage continuously rises to be greater than a second pressure threshold, the first throttling port is opened, the first chamber is communicated with the second chamber through the first throttling port, and oil pressure for resisting the pushing of the eccentric ring is established in the second chamber. According to the engine oil pump with the variable displacement, the structure is simple and reliable, the cost is low, and meanwhile, the oil saving effect is remarkable, so that the engine oil pump can be applied to various vehicle engines.
Description
Technical field
The present invention relates to be a kind ofly applicable to Vehicular internal combustion engine, particularly suitable but be not limited to the displacement-variable oil pump of small displacement engine.
Background technique
As everyone knows, Modern Vehicle Engine nearly all adopts oil pump that lubricated and hydraulic driving are provided, and for this reason, motor also will provide part energy to carry out driving machine oil pump for this reason.Along with consumption and the demand to environmental protection of petroleum resources, society and individual are more and more higher to the requirement of automobile fuel ecomomy, reduce the energy consumption Yi Chengliaoge engine works of oil pump and of main engine factory and pay close attention to target.Displacement-variable oil pump has started to come into the market at present, thereby general single-stage displacement-variable oil pump replaces the pressure release of traditional metering pump to reduce the driving torque of oil pump when high speed to reduce discharge capacity, can receive certain energy-saving effect, but when middle low speed, can not show, and middle low speed is just in time the most frequently used operating modes of most drivers.And if discharge capacity and the pressure of low speed in reducing by force, when high speed because discharge capacity deficiency can cause oil pressure not enough, affect engine health.For this reason, occurred two-stage variable displacement oil pump on market, it has two kinds of mode of operations, can reduce rapidly discharge capacity and pressure, to reduce oil consumption during low-voltage; The safety of motor in the time of guaranteeing high speed and hot idling during high pressure mode.But two-stage variable displacement oil pump structure becomes very complicated, also will increase electrical and electronic component simultaneously, cost is very high, and reliability reduces.On the basis of two stage pump, controlled oil pump is also under development, but cost is higher, has greatly increased engine calibration content simultaneously, thereby popularization is restricted.
Publication number is that the Chinese patent application of CN102364205A discloses a kind of displacement-variable oil pump.Described stator and rotor and the oil circuit control chamber that can displacement-variable oil pump comprises eccentric setting.On described stator, establish elastic element.In oil circuit control chamber, oil pressure increases until while overcoming on elastic element precompression, stator rotation, and changed the centripetal moment between stator and rotor, discharge capacity is reduced.It is visible that to be that discharge capacity reduces the pressure that produces with elastic element linear.The oil pump of this structure has realized can variable displacement, but the defect existing is: after engine speed rises, because discharge capacity reduces too fastly, oil pump cannot continue the required oil pressure of provisioning engine.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple, low-cost, displacement-variable oil pump reliably, in realization, reduces oil pump capacity and oil duct pressure during low speed, and during high speed, discharge capacity reduces and eases up to guarantee pressure, realizes the energy that covers full operating mode and saves.
The present invention by the following technical solutions.
A displacement-variable oil pump, it comprises oil pump body, described oil pump body comprises eccentric hoop; The first chamber and the second chamber separately, described the first chamber is communicated with machine oil delivery side of pump oil circuit; And first segment head piece and second section head piece, described first segment head piece is connected with the import in described the second chamber, and described second section head piece is connected with the outlet in described the second chamber; Wherein, when the oil pressure of described outlet oil circuit is greater than the first pressure threshold, the oil pressure in described the first chamber can force described eccentric hoop to promote towards the direction that oil pump discharge capacity is reduced; When the oil pressure of described outlet oil circuit continues to rise to while being greater than the second pressure threshold, described first segment head piece is opened, described the first chamber is communicated with described the second chamber by described first segment head piece, and in described the second chamber, sets up the oil pressure that the described eccentric hoop of opposing promotes.
The first pressure threshold and the second pressure threshold can be set according to the work requirements of oil pump, and corresponding is oil pump low speed (or middle low speed) operating mode and high-speed working condition respectively.Under low speed operating mode, work in the first chamber; Under high-speed working condition, the first chamber and the second chamber acting in conjunction.
Preferably, described eccentric hoop is provided with elastic element, and described elastic element has the initializaing variable pressure of corresponding described the first pressure threshold.Preferably, described initializaing variable pressure is less than 300KPa, far below the Decompression valves cracking pressure of fixed displacement oil pump, has discharge capacity faster simultaneously and reduces speed, to reduce oil pump capacity and engine oil pressure, reduces energy consumption.
Above-mentioned displacement-variable oil pump, surpasses certain setting value at pressure, during the second pressure threshold, outlet or main oil gallery pressure are introduced to the second chamber after by throttling pressure regulation, make discharge capacity reduce Speed Reduction, to obtain high engine oil pressure when the high speed, guarantee engine health.The initial oil pressure value that the discharge capacity of this setting increases back can be determined by engine characteristics, pressure as required in piston cooling nozzle rated flow and corresponding working speed etc.
Preferably, described oil pump body also comprises the safety valve of being located on described outlet oil circuit, and when the oil pressure of described outlet oil circuit finally rises to while being greater than the 3rd pressure threshold, described safety valve is opened.
Above-mentioned displacement-variable oil pump, when pressure surpasses pressure maximum demand, safety valve is opened, and pressure release rapidly, to tackle the special operation conditions such as cold-starting, reduces energy consumption and guarantees engine health.
Preferably, described eccentric hoop extends diametrically and is provided with protuberance, and described elastic element is located between a side and described oil pump body of described protuberance, and the opposite side of described protuberance is in described the first chamber.
Preferably, described the first chamber and described the second chamber separately along the periphery of described eccentric hoop around.
Preferably, between the one end in described the first chamber and the one end in described the second chamber, by the first Sealing, separated; Between the other end in the other end in described the first chamber and described the second chamber, by the second Sealing separately, wherein said the first Sealing is also the center of rotation of described eccentric hoop.
Preferably, described first segment head piece is rectangular throttling groove, and described throttling groove is divided into the first port and the second port by described eccentric hoop, and described the first port connects described the first chamber, and described the second port connects the import in described the second chamber.
Preferably, described the first port is relative with described the second port, and when the orifice size of described the first port increases, the orifice size of described the second port reduces.
Preferably, described second section head piece is throttle orifice.
Preferably, the crankcase of described second section head piece connecting engine.
Preferably, when the oil pressure of described outlet oil circuit is greater than the second pressure threshold, the oil pressure scope in described the second chamber is 0 to 60KPa.
The displacement-variable oil pump the present invention relates to is realized motor middle and slow speed of revolution low oil pressure in the situation that not adopting solenoid electric valve, the high oil pressure of high rotating speed, and can avoid low temperature downforce too high.The present invention is simple in structure, reliable, and cost is low, and oil-saving effect is remarkable simultaneously, applicable to various vehicular engines.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art hold intelligible: these accompanying drawings are the object for illustrating only, and is not intended to protection scope of the present invention to be construed as limiting.In figure:
Fig. 1 is the assembly schematic diagram of the displacement-variable oil pump that the present invention relates to;
Fig. 2 is after the pump cover of the displacement-variable oil pump that the present invention relates to is opened, the internal structure schematic diagram of the pump housing;
Fig. 3 is the structural representation of the pump cover of the displacement-variable oil pump that the present invention relates to;
Fig. 4 is the working state figure of the displacement-variable oil pump eccentric hoop under low speed operating mode that the present invention relates to;
Fig. 5 is the working state figure of the displacement-variable oil pump eccentric hoop under high-speed working condition that the present invention relates to.
Embodiment
For helping those skilled in the art can understand definitely the claimed theme of the present invention, below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
Referring to Fig. 1, it is the assembly schematic diagram of the displacement-variable oil pump that the present invention relates to.Described displacement-variable oil pump is located in the crankcase of motor, comprises pump cover 13 and the pump housing 14, and pump cover 13 is provided with filler opening 15, and the pump housing 14 is provided with oil outlet 16, main oil gallery feedback oil duct 17 and safety valve 6.Filler opening 15 is communicated with import oil circuit, and oil outlet 16, main oil gallery feedback oil duct 17 and safety valve 6 are all located on outlet oil circuit.Machine oil enters from filler opening 15, by oil pump body, finally from oil outlet 16, flows out.According to needs are set, main oil gallery feedback oil duct 17 can feed back to control gear by oil pressure on outlet oil circuit, when oil pressure on outlet oil circuit is too high, also can carry out release by safety valve 6.Pump cover 13 also, by bolt and the pump housing 14 closures, forms hydraulic space between pump cover 13 and the pump housing 14.
Referring to Fig. 2, for after the pump cover 13 of the displacement-variable oil pump that the present invention relates to opens, the internal structure schematic diagram of the pump housing 14.In oil pump body, establish a cavity, establish eccentric hoop 1 in cavity, the gap between described eccentric hoop 1 and cavity forms the first chamber 2 and the second chamber 3, the first chamber 2 and the second chamber 3 separately along the periphery of eccentric hoop 1 around.Between the one end in the one end in the first chamber 2 and the second chamber 3, by the first Sealing 9, separated; Between the other end in the other end in the first chamber 2 and the second chamber 3, by the second Sealing 10 separately, wherein the first Sealing 9 is also the center of rotation of eccentric hoop 1.The first Sealing 9 can be arranged to roll pin, and eccentric hoop 1 untie-sell that rotates is rotated.The first feedback cavity of chamber 2 for total displacement is reduced, the second feedback cavity of chamber 3 for total displacement is increased.Here so-called " discharge capacity " refers to that the input shaft of oil pump rotates the output oil mass of a circle.So-called " total displacement " refers to the total oil mass of output of certain hour inner engine oil pump.
Eccentric hoop 1 extends and is provided with protuberance 8 diametrically, between a side of protuberance 8 and the pump housing 14, elastic element 7 is set, and is preferably the pressure adjusting spring that is provided with precompression, and the opposite side of protuberance 8 is in the first chamber 2.Oil pressure in the first chamber 2 overcomes after the precompression of pressure adjusting spring, can promote eccentric hoop 1 untie-sell that rotates and rotate.
The structural representation of the pump cover 13 of the displacement-variable oil pump relating in conjunction with the present invention shown in Fig. 3, pump cover 13 is provided with first segment head piece 4 and second section head piece 5.Preferably, first segment head piece 4 is rectangular throttling groove, and second section head piece 5 is the throttle orifice of connecting engine crankcase.Throttling groove is the import in the second chamber 3, and throttle orifice is the outlet in the second chamber 3.The second Sealing 10 is located between protuberance 8 and the pump housing 14, and the second Sealing 10 is preferably Stamping Steel Ribbon.After pump cover 13 closes, the rotation of eccentric hoop 1 can make the relative throttling groove of protuberance 8 swing.Because it is the part in the first chamber 2 that protuberance 8 has a side, when this side process throttling groove, throttling groove is opened.Throttling groove is divided into the first port 11 and the second port one 2 by eccentric hoop 1, and after throttling groove is opened, the first port 11 connects the first chamber 2, and machine oil enters throttling groove from the first chamber 2, and flows out into the second chamber 3 from the second port one 2.As seen from the figure, the first port 11 and the second port one 2 are oppositely arranged, and in the rotation process of eccentric hoop 1, the orifice size of the first port 11 increases, and the orifice size of the second port one 2 is reducing.
The oil pump body the present invention relates to is displacement-variable oil pump, is blade type oil pump in the present embodiment.In conjunction with Fig. 2 and Fig. 3, the embedded rotor 18 of eccentric hoop 1, described rotor 18 is connected with the input shaft of motor, on rotor 18, be radially provided with a plurality of blades 19, in eccentric hoop 1, be divided into a plurality of airtight cavity volumes 20, input shaft rotor driven 18 rotates, and the machine oil of entrance oil duct is inhaled into, and after transmitting, is brought into outlet oil circuit.As eccentric hoop 1 rotates, the distance between eccentric hoop 1 and rotor 18 changes, thereby has changed the volume of cavity volume 20, with having changed machine oil pump delivery.In the present embodiment, when eccentric hoop 1 is along clockwise direction rotation as shown in Figure 2, centripetal moment reduces, and can reduce machine oil pump delivery.
The operative scenario of this oil pump will be introduced in detail below, so that can understand better structural feature of the present invention, working principle and advantage thereof.
As shown in Figure 4, under general low speed operating mode, eccentric hoop 1 is by throttling groove sealing, and the second chamber 3 is identical with engine crankcase by throttle orifice, keeps substantially invariable back pressure, is not subject to the impact of oil pump import negative pressure.This operation of oil pump state is the same with general single-stage variable displacement pump, feed back oil duct 17 enter the first chamber 2 from the pressure of motor main oil gallery by main oil gallery, promotes eccentric hoop 1 towards compressing pressure adjusting spring along counter clockwise direction in figure, and oil pump offset reduces, and discharge capacity reduces.But due to the design of this oil pump pressure adjusting spring have lower variable displacement initial pressure and faster discharge capacity reduce speed, initializaing variable pressure can be less than 300KPa, therefore after oil pressure has surpassed pressure regulation power, with rotating speed, raise and only have rising, the oil pressure that oil pump only provides motor just to need, does not have too much surplus.Because work discharge capacity and the pressure of oil pump are all very little, energy-saving effect is very obvious.
As shown in Figure 5, when engine operation is during at high-speed working condition, due to the motion of eccentric hoop 1, throttling groove is opened, and machine oil enters the second chamber 3 from the first chamber 2 through throttling grooves, then flows out from throttle orifice.The size of throttling groove and throttle orifice arranges meticulously by calculation and test, can in the second chamber 3, produce certain pressure, as 0 to 60kPa, to resist the oil pressure in the first chamber 2, thereby slow down the speed that oil pump capacity reduces, while guaranteeing high speed, motor has enough oil pressure.Because throttle orifice is very little, the flow that this part is leaked is also very little, very little on the energy consumption impact that pump is total.
When engine operation is during in cold start-up operating mode, the working position of eccentric hoop 1 and motor approach at high-speed working condition, at this time because engine oil viscosity is very large, oil pressure can be lower high more a lot of than normal working temperature (as 100 degree), safety valve 6 will be opened, unnecessary machine oil is directly vented, guarantee engine health.
To enumerate the mode of some specific embodiments, illustrate in detail displacement-variable oil pump of the present invention above, these a few examples are only for explanation principle of the present invention and mode of execution thereof, but not limitation of the present invention, without departing from the spirit and scope of the present invention, those of ordinary skill in the art can also make various distortion and improvement, as changed main oil gallery feedback into exit feedback, these and other all equivalent technical solutions all should belong to category of the present invention and be limited by every claim of the present invention.
Claims (12)
1. a displacement-variable oil pump, is characterized in that comprising:
Oil pump body, described oil pump body comprises:
Eccentric hoop (1);
The first chamber (2) and the second chamber (3) separately, described the first chamber (3) is communicated with machine oil delivery side of pump oil circuit; And
First segment head piece (4) and second section head piece (5), described first segment head piece (4) is connected with the import in described the second chamber (3), and described second section head piece (5) is connected with the outlet in described the second chamber (3);
Wherein, when the oil pressure of described outlet oil circuit is greater than the first pressure threshold, the oil pressure in described the first chamber (2) can force described eccentric hoop (1) to promote towards the direction that oil pump discharge capacity is reduced; When the oil pressure of described outlet oil circuit continues to rise to while being greater than the second pressure threshold, described first segment head piece (4) is opened, described the first chamber (2) is communicated with described the second chamber (3) by described first segment head piece (4), and sets up the oil pressure that the described eccentric hoop of opposing (1) promotes in described the second chamber (3).
2. displacement-variable oil pump according to claim 1, it is characterized in that: described oil pump body also comprises the safety valve (6) of being located on described outlet oil circuit, when the oil pressure of described outlet oil circuit finally rises to while being greater than the 3rd pressure threshold, described safety valve (6) is opened.
3. displacement-variable oil pump according to claim 1, is characterized in that: described eccentric hoop (1) is provided with elastic element (7), and described elastic element (7) has the initializaing variable pressure of corresponding described the first pressure threshold.
4. displacement-variable oil pump according to claim 3, is characterized in that: described initializaing variable pressure is less than 300KPa.
5. displacement-variable oil pump according to claim 3, it is characterized in that: described eccentric hoop (1) extends diametrically and is provided with protuberance (8), described elastic element (7) is located between a side and described oil pump body of described protuberance (8), and the opposite side of described protuberance (8) is in described the first chamber (2).
6. displacement-variable oil pump according to claim 1, is characterized in that: described the first chamber (2) and described the second chamber (3) separately along the periphery of described eccentric hoop (1) around.
7. displacement-variable oil pump according to claim 1, is characterized in that: between the one end in described the first chamber (2) and the one end in described the second chamber (3), by the first Sealing (9), separated; Between the other end in the other end in described the first chamber (2) and described the second chamber (3), by the second Sealing (10) separately, wherein said the first Sealing (9) is also the center of rotation of described eccentric hoop (1).
8. displacement-variable oil pump according to claim 1, it is characterized in that: described first segment head piece (4) is rectangular throttling groove, described throttling groove is divided into the first port (11) and the second port (12) by described eccentric hoop (1), described the first port (11) connects described the first chamber (2), and described the second port (12) connects the import in described the second chamber (3).
9. displacement-variable oil pump according to claim 8, it is characterized in that: described the first port (11) is relative with described the second port (12), when the orifice size of described the first port (11) increases, the orifice size of described the second port (12) reduces.
10. displacement-variable oil pump according to claim 1, is characterized in that: described second section head piece (5) is throttle orifice.
11. displacement-variable oil pumps according to claim 1, is characterized in that: the crankcase of described second section head piece (5) connecting engine.
12. displacement-variable oil pumps according to claim 1, is characterized in that: when the oil pressure of described outlet oil circuit is greater than the second pressure threshold, the oil pressure scope in described the second chamber (3) is 0 to 60KPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117004.3A CN104100825B (en) | 2013-04-07 | 2013-04-07 | Displacement-variable oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117004.3A CN104100825B (en) | 2013-04-07 | 2013-04-07 | Displacement-variable oil pump |
Publications (2)
| Publication Number | Publication Date |
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| CN104100825A true CN104100825A (en) | 2014-10-15 |
| CN104100825B CN104100825B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310117004.3A Active CN104100825B (en) | 2013-04-07 | 2013-04-07 | Displacement-variable oil pump |
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| CN (1) | CN104100825B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106969249A (en) * | 2017-04-26 | 2017-07-21 | 奇瑞汽车股份有限公司 | A kind of vane type lubricating oil pump |
| CN107327689A (en) * | 2017-08-17 | 2017-11-07 | 湖南机油泵股份有限公司 | A kind of duplex lubricating oil pump of variable displacement |
| CN108343832A (en) * | 2017-01-23 | 2018-07-31 | 长城汽车股份有限公司 | Displacement-variable oil pump and its application method |
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| CN101566151B (en) * | 2008-04-23 | 2011-08-17 | 萱场工业株式会社 | Variable displacement vane pump |
| CN102410214A (en) * | 2011-11-03 | 2012-04-11 | 湖南机油泵股份有限公司 | Middle-section variable high-speed pressure limiting three-section pressure feedback variable-displacement vane pump and variable-displacement method |
| CN102906426A (en) * | 2010-05-28 | 2013-01-30 | 皮尔伯格泵技术有限责任公司 | Variable displacement lubricant pump |
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Patent Citations (6)
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| CN1403711A (en) * | 2001-08-31 | 2003-03-19 | 尤尼西亚Jkc控制系统株式会社 | Variable desplacement pump |
| CN101010513A (en) * | 2004-05-07 | 2007-08-01 | 特斯玛国际公司 | Vane pump using line pressure to directly regulate displacement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108343832A (en) * | 2017-01-23 | 2018-07-31 | 长城汽车股份有限公司 | Displacement-variable oil pump and its application method |
| CN106969249A (en) * | 2017-04-26 | 2017-07-21 | 奇瑞汽车股份有限公司 | A kind of vane type lubricating oil pump |
| CN107327689A (en) * | 2017-08-17 | 2017-11-07 | 湖南机油泵股份有限公司 | A kind of duplex lubricating oil pump of variable displacement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104100825B (en) | 2017-03-15 |
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