CN103912487A - Oil pump for vehicle - Google Patents
Oil pump for vehicle Download PDFInfo
- Publication number
- CN103912487A CN103912487A CN201310711958.7A CN201310711958A CN103912487A CN 103912487 A CN103912487 A CN 103912487A CN 201310711958 A CN201310711958 A CN 201310711958A CN 103912487 A CN103912487 A CN 103912487A
- Authority
- CN
- China
- Prior art keywords
- oil
- motor
- solenoid valve
- oil pump
- room
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0238—Rotary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0246—Adjustable pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The oil pump for a vehicle may include a housing forming an outer wall of the oil pump, an outer ring to control a pumping volume of an oil, a first chamber for storing a pumped oil and connected to an engine to supply the oil to the engine, a second chamber selectively communicated to the first chamber to store the pumped oil, a rotor moving along a radial direction to pump the oil and rotating at the same time, an elastic member for controlling an operation pressure of the oil to maintain a working moment of the outer ring, and a solenoid valve for selectively communicating the first chamber with the second chamber.
Description
The cross reference of related application
The application requires the preference of No. 10-2012-0157472nd, the korean patent application submitted to December 28 in 2012, and the full content of this application is incorporated into this all objects for quoting by this.
Technical field
The present invention relates to a kind of oil pump for vehicle.More specifically, the present invention relates to a kind of oil pump for vehicle that uses ON/OFF solenoid valve.
Background technique
Conventionally, operated by the moment of torsion of chain or gear transmission by bent axle or camshaft for the oil pump of vehicle.Oil pump sucks the oil in food tray, is the oily supercharging sucking and the each friction member that supplies lubrication oil to motor.Pump performance embodies by fuel delivery and charge oil pressure.In addition, oil pump is divided into outer gear type and internal gear type.In outside gear-type, often use involute tooth, and in internal gear type, often use trochoid curves.
Regulator is set so that the hydraulic pressure of lubricated portion is remained in prespecified range at oil pump place.In addition, oil viscosity changes according to oil temperature, and fuel delivery and engine speed are proportional.Therefore, regulator is suitably controlled for lubricated hydraulic pressure by temperature.Regulator chamber is arranged on regulator place in order to store oil.
Regulator chamber can be provided with at least one solenoid valve, and this solenoid valve setting is in order to control the oily amount and the pressure that are transferred to motor from oil pump.Solenoid valve is adapted to and is optionally communicated with regulator chamber and other regulator chamber.
But in the situation that proportional control solenoid valve uses as solenoid valve, the composition of oil pump may complexity and the manufacture cost of oil pump may increase.In addition,, because proportional control solenoid valve needs accurately to control, therefore additionally increased the difficulty of controlling.Meanwhile, guarantee that the durability of the exquisite parts that comprise at proportional control solenoid valve place may be more difficult.
The information that is disclosed in this background technique part is only intended to deepen the understanding to general background technique of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been prior art known in those skilled in the art.
Summary of the invention
The present invention is devoted to provide the oil pump for vehicle of the advantage with simple structure.In addition, the present invention is devoted to provide a kind of like this oil pump for vehicle, and it has advantages of easy control fuel delivery and supplies oil pressure.
Can comprise according to the oil pump for vehicle of All aspects of of the present invention: shell, described shell forms the outer wall of described oil pump; Outer shroud, the pump output of described outer shroud control oil; The first Room, described the first Room is for storing the oil of institute's pumping and being connected to motor oil is supplied to described motor; The second Room, described the second Room is optionally communicated to the oil of described the first Room with the pumping of storage institute; Rotor, described rotor moves with pump oil and is rotated simultaneously along radial direction; Resilient member, described resilient member is used for control operation pressure to keep the work moment of described outer shroud; And solenoid valve, described solenoid valve is for being optionally communicated with described the first Room with described the second Room.
Described solenoid valve can be ON/OFF solenoid valve, and this ON/OFF solenoid operated is with two step opening/closings.
Described oil pump may further include: electronic control unit, and described electronic control unit receives engine speed and described engine speed and desired speed is compared; And temperature transducer, oil temperature described in described temperature sensor senses in motor and by the communication about described oil temperature to described electronic control unit, described in wherein said electronic control unit control solenoid valve with according to described engine speed and by described temperature sensor senses to described oil temperature and opening/closing.
Described solenoid valve can be controlled respectively on each region at least two regions, and described two regions are divided according to the oil temperature in described motor.
Can on each region at least two regions, be determined for the engine speed that operates described solenoid valve, described two regions are divided according to the oil temperature in described motor.
If described engine speed is slower than the desired speed of described motor, described solenoid valve stays open, and if described engine speed arrives the described closed electromagnetic valve of desired speed of described motor.
On region in the time that the oil temperature of described motor is relatively low, can be relatively high for the predetermined engine speed of closing described solenoid valve, and on region in the time that the oil temperature of described motor is relatively high, can be relatively low for the predetermined engine speed of closing described solenoid valve.
By including accompanying drawing herein in and being used from subsequently the embodiment of explanation some principle of the present invention with accompanying drawing one, other feature and advantage that method and apparatus of the present invention has will more specifically become clear or be illustrated.
Accompanying drawing explanation
Fig. 1 is according to the schematic diagram of the exemplary oil pump for vehicle of the present invention.
Fig. 2 illustrates the rotating speed of motor and from according to the plotted curve for the relation between oil pressure of the exemplary oil pump for vehicle of the present invention.
Embodiment
With detailed reference to each embodiment of the present invention, the example of these embodiments is shown in the accompanying drawings and is described below below.Although the present invention will combine and be described with exemplary, should recognize, this specification is not intended to limit the invention to those exemplary.On the contrary, the present invention is intended to not only cover these exemplary, and covers various selection forms, modification, the equivalent form of value and other embodiment that can be included within the spirit and scope of the present invention that limited by claims.
Fig. 1 is according to the schematic diagram of the oil pump for vehicle of each embodiment of the present invention.As shown in Figure 1, comprise shell 10, outer shroud 11, the first Room 14, the second Room 15, rotor 12, blade 18, interior ring 19, resilient member 13 and solenoid valve 50 for the oil pump 1 of vehicle.
Shell 10 is the casees that form the outer wall of oil pump 1.One end of outer shroud 11 is rotationally attached to shell 10 by pivot pin 3.In addition, the pumping capacity of oil pump 1 is determined around the rotation of pivot pin 3 according to outer shroud 11.
The first Room 14 and the second Room 15 are the oily spaces for storing 1 pumping of oil pump.In addition, the first Room 14 and the second Room 15 be adapted to the hydraulic pressure of control oil pump 1 and be formed on shell 10 and outer shroud 11 between.
In the time that oil pump 1 operates by the rotation of bent axle or camshaft, rotor 12 rotations are also radially moved.Thus, oil is pumped by the operation of rotor 12.Blade 18 rotates by the rotation of rotor 12.In addition, the pumping capacity of oil pump 1 can change according to the quantity of blade 18.
Interior ring 19 is arranged in the inner side place of outer shroud 11, and the radius of the radius ratio outer shroud 11 of interior ring 19 is short.In addition, interior ring 19 contacts one end of blade 18; The inner circumference of the other end of blade 18 and outer shroud 11 contacts with each other all the time.
Resilient member 13 is arranged in a side place of outer shroud 11.In addition, resilient member 13 control operation pressure are stably to keep the work moment of outer shroud 11.
Some parts of oil pump 1 including shell 10, outer shroud 11, the first Room 14, the second Room 15, rotor 12, blade 18, interior ring 19 and resilient member 13 are well known in the art, therefore will omit its concrete description.
Solenoid valve 50 is set in order to optionally the first Room 14 is communicated with the second Room 15.In addition, oilhole 16 and oil duct 17 are formed on shell 10 places.
Oilhole 16 is for being adapted to the hole that the first Room 14 is communicated with solenoid valve 50.In addition, oil duct 17 is for being adapted to the passage that solenoid valve 50 is communicated with the second Room 15.That is solenoid valve 50 optionally opens or closes between oilhole 16 and oil duct 17, thereby optionally oilhole 16 is communicated with oil duct 17.
Here, solenoid valve 50 is ON/OFF solenoid valve, and this ON/OFF solenoid operated is to open and close with two steps.For example, in the time of power supply, solenoid valve 50 is operating as and opens, and when electric power is not operating as and closes for seasonable solenoid valve 50, or solenoid valve 50 is operating as and cuts out when power supply, when electric power the seasonable solenoid valve 50 of confession be operating as and open.
Comprise temperature transducer 30 and electronic control unit 20 according to the oil pump 1 of each embodiment of the present invention, and oil pump 1 is connected with motor 40.In addition, oil is supplied to motor 40 by oil pump 1.Here, thus motor 40 is connected with oil pump 1 and receives from the oil of the first Room 14.
Temperature transducer 30 is connected with motor 40 and solenoid valve 50, and responds to the oily temperature in inflow engine 40.
Electronic control unit 20 is controlled the opening/closing of solenoid valve 50.In addition, electronic control unit 20 is connected with temperature transducer 30, thereby receives the information about oil temperature from temperature transducer 30.Electronic control unit 20 bases are received from the information about oil temperature of temperature transducer 30 and the rotating speed of motor 40 is controlled solenoid valve 50.Here, electronic control unit 20 can be the universal electric control unit (ECU: electronic control unit) of the various control gear of monitoring vehicle electronic equipment.
It is all well known to those skilled in the art that the method for detection motor 40 rotating speeds and electronic control unit 20 are preserved about the method for the information of detected motor 40 rotating speeds, therefore will omit its detailed description.
Hereinafter, the rotating speed based on motor 40 is described in detail to the operation of oil pump 1.
Solenoid valve 50 is opened at the low-speed region of motor 40.That is the first Room 14 and the second Room 15 communicate with each other.Here, the situation when low-speed region of motor 40 refers to that rotating speed when motor 40 is less than or equal to setting speed, setting speed can pre-determine.In addition,, when in the time that the low-speed region solenoid valve 50 of motor 40 is opened, oil is filled in the first Room 14 and the second Room 15.
Oil pump 1 is controlled in each region, and each region is divided into master control region and secondary control region along with the rotating speed increase of motor 40.In addition, electronic control unit 20 is determined the rotating speed of motor 40, and controls solenoid valve 50.
Solenoid valve 50 is opened in master control region.The oil mass of discharging from oil pump 1 and oil pressure increase along with the increase of motor 40 rotating speeds, and oil pressure puts on the first Room 14 and the second Room 15.In addition the oil pressure that, puts on the first Room 14 and the second Room 15 increases and exceedes the predetermined pressure in resilient member 13 places.In addition, outer shroud 11 passes through the increased oil pressure that exceedes resilient member 13 predetermined pressures and rotates in a counter-clockwise direction in the accompanying drawings.Therefore, outer shroud 11 diminishes with respect to the offset at oil pump 1 center, and the oil mass of discharging from oil pump 1 diminishes.Here, along with the oil mass of discharging from oil pump 1 reduce can improve oil consumption.
Secondary control region is that the rotating speed of motor 40 compared with master control region becomes region faster.Solenoid valve 50 cuts out in secondary control region.That is, do not flow in the second Room 15 through the oil of oil-through hole 16, solenoid valve 50 and oil duct 17.In addition the oil pressure that, only puts on the first Room 14 is lower than the predetermined pressure in resilient member 13 places.Therefore, outer shroud 11 is rotation in a clockwise direction in the accompanying drawings, and outer shroud 11 is large with respect to the eccentric quantitative change at oil pump 1 center.That is the oil mass of discharging from oil pump 1 increases, and oil pressure in motor 40 uprises.
When in the rotating speed of motor 40 period after secondary changes, become faster time, the rotating speed of the increase of the oil mass of discharging from oil pump 1 and motor 40 is proportional.
Meanwhile, when motor 40 speed are when slack-off, oil pump 1 carries out inverse operation.That is, in the time that motor 40 speed accelerate, sequentially operate the period after oil pump 1 changes according to the low-speed region of motor 40, master control region, secondary control region and secondary, and when motor 40 speed are when slack-off, the low-speed region of period, secondary control region, master control region and motor after oil pump 1 changes according to secondary sequentially operates.
Fig. 2 illustrates the rotating speed of motor and from according to the plotted curve for the relation between oil pressure of the oil pump for vehicle of each embodiment of the present invention.As shown in Figure 2, according to ordinary curve L1, exist a region oil pressure too high, described ordinary curve L1 shows for the relation between oil pressure and motor 40 rotating speeds.Here be the oily pressure that is supplied to motor 40 from oil pump 1 for oil pressure.
The oil pressure that supplies of oil pump 1 can be by the operation of oil pump 1 according to being optimized control about the figure L2 that supplies oil pressure and motor 40 rotating speeds.Especially, within the rotating ratio master control region of motor 40 fast period, between figure L2 of the present invention and ordinary curve L1, there is clear and definite difference or essence difference.Here can improve oil consumption due to the difference between figure L2 of the present invention and ordinary curve L1.
The starting point Ps in the starting point Pf in master control region and secondary control region determines according to the desired speed of motor 40, and is predetermined for the rotating speed of determining the motor 40 that master control region and secondary control region start.In addition, along with accelerating and improved oil consumption for motor 40 rotating speeds of determining the startup of secondary control region.But because the gap between motor 40 rotating speeds for starting master control region and secondary control region is larger, in motor 40, the state of low on fuel may be longer.That is, the durability possible deviation of motor 40.
Therefore, can consider that the durability of motor 40 and oil consumption are intended for determining the rotating speed of the motor 40 that master control region and secondary control region start.
Electronic control unit 20 carries out the logic control of solenoid valve 50 according to oil temperature.In addition change according to oil temperature for the rotating speed of the motor 40 that starts secondary control region.Electronic control unit 20 is controlled solenoid valve 50 by dividing the state of engine low temperature and the state of engine high-temperature.
The state of engine low temperature is the situation that the oil in motor 40 has low temperature, and the state of engine low temperature can be that the oil temperature of motor 40 is lower than the state of 80 ℃.In addition, under the state of engine low temperature, because oil temperature is lower, oil pressure uprises naturally.The heat load of the parts that in addition, comprise motor 40 is relatively low under the state of engine low temperature.
Under the state of engine low temperature, can be confirmed as relatively high speed for motor 40 rotating speeds that start secondary control region.For example, under the state of engine low temperature, be confirmed as 3000rpm for motor 40 rotating speeds that start secondary control region.
The state of engine high-temperature is the situation that the oil in motor 40 has high temperature, and the state of engine high-temperature can be that the oil temperature of motor 40 is greater than or equal to the state of 80 ℃.In addition, under the state of engine high-temperature due to relatively high compared with the state of oil temperature and engine low temperature, oil pressure nature step-down.In addition, comprise that the heat load of parts of motor 40 is relatively high under the state of engine high-temperature.
Under the state of engine low temperature, can be confirmed as relatively low speed for motor 40 rotating speeds that start secondary control region.For example, under the state of engine high-temperature, be confirmed as 2000rpm for motor 40 rotating speeds that start secondary control region.
Meanwhile, further segmented for the region of determining oil temperature, and can on each segmentation region, be scheduled to for motor 40 rotating speeds that start secondary control region.For example, for determine oil temperature that the region of oil temperature can be divided into motor 40 lower than the oil temperature of the region of 50 ℃, motor 40 greater than or equal to 50 ℃ and lower than the oil temperature of the region of 100 ℃ and motor 40 region greater than or equal to 100 ℃, and on each region, can be defined as respectively 3000rpm, 2500rpm and 2000rpm for motor 40 rotating speeds that start secondary control region.
As mentioned above, if for determining the region of oil temperature and being determined for motor 40 rotating speeds that start secondary control region, for start that motor 40 rotating speeds in secondary control region can be determined in advance high as much as possible and can improve oil consumption, can significantly improve in some cases oil consumption.Meanwhile, can further segment for the region of determining oil temperature.
According to each embodiment of the present invention, can easily control fuel delivery and charge oil pressure by use ON/OFF solenoid valve 50, thereby optionally be communicated with the first Room 14 and the second Room 15.In addition, there is the ON/OFF solenoid valve 50 of simple controlling method by utilization, need temperature transducer 30 and remove pressure transducer, thus can simplify oil pump 1 structure, reduce the manufacture cost of oil pump 1 and improve simultaneously the durability of oil pump 1.
Explain and accurately limit claims for convenient, term " inner side " or " outside " etc. are used to describe with reference to the position of these features shown in accompanying drawing the feature of exemplary.
The description above concrete exemplary of the present invention being presented is for the purpose of illustration and description.Description above does not want to become milli exhaustively, neither want the present invention to be restricted to disclosed precise forms, and obviously, be all possible according to a lot of changes of above-mentioned instruction and variation.Selecting exemplary and being described is in order to explain certain principles of the present invention and practical application thereof, thereby makes others skilled in the art can realize and utilize various exemplary of the present invention and different choice form and modification.Scope of the present invention is intended to be limited by appended claims and the equivalent form of value thereof.
Claims (7)
1. for an oil pump for vehicle, comprising:
Shell, described shell forms the outer wall of described oil pump;
Outer shroud, described outer shroud control pump oil mass;
The first Room, described the first Room is for storing the oil of institute's pumping and being connected to motor oil is supplied to described motor;
The second Room, described the second Room is optionally communicated to the oil of described the first Room with the pumping of storage institute;
Rotor, described rotor moves in order to pump oil and is rotated simultaneously along radial direction;
Resilient member, described resilient member is used for control operation pressure to keep the work moment of described outer shroud; And
Solenoid valve, described solenoid valve is for being optionally communicated with described the first Room with described the second Room.
2. the oil pump for vehicle according to claim 1, wherein said solenoid valve is ON/OFF solenoid valve, this ON/OFF solenoid operated is with two step opening/closings.
3. the oil pump for vehicle according to claim 1, further comprises:
Electronic control unit, described electronic control unit receives engine speed and described engine speed and desired speed is compared; With
Temperature transducer, the oil temperature described in described temperature sensor senses in motor and by the communication about described oil temperature to described electronic control unit,
Described in wherein said electronic control unit control solenoid valve with according to described engine speed and by described temperature sensor senses to described oil temperature and opening/closing.
4. the oil pump for vehicle according to claim 3, wherein said solenoid valve is controlled respectively on each region at least two regions, and described two regions are divided according to the oil temperature in described motor.
5. the oil pump for vehicle according to claim 4, is wherein determined on each region at least two regions for the engine speed that operates described solenoid valve, described two regions are divided according to the oil temperature in described motor.
6. the oil pump for vehicle according to claim 5, if wherein described engine speed is slower than the desired speed of described motor, described solenoid valve stays open, and if described engine speed arrives the described closed electromagnetic valve of desired speed of described motor.
7. the oil pump for vehicle according to claim 6, wherein on the region in the time that the oil temperature of described motor is relatively low, relatively high for closing the predetermined engine speed of described solenoid valve, and on region in the time that the oil temperature of described motor is relatively high, relatively low for closing the predetermined engine speed of described solenoid valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120157472 | 2012-12-28 | ||
| KR10-2012-0157472 | 2012-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103912487A true CN103912487A (en) | 2014-07-09 |
Family
ID=50928587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310711958.7A Pending CN103912487A (en) | 2012-12-28 | 2013-12-20 | Oil pump for vehicle |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20140182541A1 (en) |
| CN (1) | CN103912487A (en) |
| DE (1) | DE102013114268A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412759A (en) * | 2017-02-10 | 2018-08-17 | 通用汽车环球科技运作有限责任公司 | Oil pump for engine with electronic hydraulic control device |
| CN110894831A (en) * | 2018-09-12 | 2020-03-20 | 通用汽车环球科技运作有限责任公司 | Variable displacement pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9771935B2 (en) * | 2014-09-04 | 2017-09-26 | Stackpole International Engineered Products, Ltd. | Variable displacement vane pump with thermo-compensation |
| US11905948B2 (en) * | 2015-06-19 | 2024-02-20 | Hitachi Astemo, Ltd. | Variable displacement oil pump including swing member |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9181803B2 (en) * | 2004-12-22 | 2015-11-10 | Magna Powertrain Inc. | Vane pump with multiple control chambers |
| US20070224067A1 (en) * | 2006-03-27 | 2007-09-27 | Manfred Arnold | Variable displacement sliding vane pump |
| CN101978167B (en) * | 2008-08-01 | 2014-02-26 | 爱信精机株式会社 | Oil pump |
| JP5174720B2 (en) * | 2009-03-09 | 2013-04-03 | 日立オートモティブシステムズ株式会社 | Variable displacement pump |
| JP5564450B2 (en) * | 2011-02-17 | 2014-07-30 | 日立オートモティブシステムズ株式会社 | Oil pump |
| US9121335B2 (en) * | 2011-05-13 | 2015-09-01 | Ford Global Technologies, Llc | System and method for an engine comprising a liquid cooling system and oil supply |
| JP5620882B2 (en) * | 2011-05-23 | 2014-11-05 | 日立オートモティブシステムズ株式会社 | Variable displacement pump |
| JP5711628B2 (en) * | 2011-07-28 | 2015-05-07 | 日立オートモティブシステムズステアリング株式会社 | Solenoid valves, solenoids and variable displacement pumps |
| JP5688003B2 (en) * | 2011-12-21 | 2015-03-25 | 日立オートモティブシステムズ株式会社 | Variable displacement oil pump |
-
2013
- 2013-12-05 US US14/098,506 patent/US20140182541A1/en not_active Abandoned
- 2013-12-18 DE DE102013114268.0A patent/DE102013114268A1/en not_active Withdrawn
- 2013-12-20 CN CN201310711958.7A patent/CN103912487A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412759A (en) * | 2017-02-10 | 2018-08-17 | 通用汽车环球科技运作有限责任公司 | Oil pump for engine with electronic hydraulic control device |
| CN110894831A (en) * | 2018-09-12 | 2020-03-20 | 通用汽车环球科技运作有限责任公司 | Variable displacement pump |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140182541A1 (en) | 2014-07-03 |
| DE102013114268A1 (en) | 2014-07-03 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140709 |