WO2016152319A1 - オイルポンプ - Google Patents
オイルポンプ Download PDFInfo
- Publication number
- WO2016152319A1 WO2016152319A1 PCT/JP2016/054355 JP2016054355W WO2016152319A1 WO 2016152319 A1 WO2016152319 A1 WO 2016152319A1 JP 2016054355 W JP2016054355 W JP 2016054355W WO 2016152319 A1 WO2016152319 A1 WO 2016152319A1
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- WO
- WIPO (PCT)
- Prior art keywords
- oil pump
- pressure chamber
- opening area
- volume
- rotation axis
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2250/00—Geometry
- F04C2250/10—Geometry of the inlet or outlet
- F04C2250/102—Geometry of the inlet or outlet of the outlet
Definitions
- the present invention relates to an oil pump.
- Patent Document 1 discloses a vane-type oil pump. This type of vane-type oil pump is mounted on an automatic transmission for a vehicle and supplies hydraulic pressure for controlling the automatic transmission. There are some that are used.
- FIG. 5A and 5B are diagrams illustrating a vane type oil pump 90 according to a conventional example.
- FIG. 5A is a cross-sectional view of the oil pump 90 and
- FIG. 5B is a communication between the pressure chamber 97 and the discharge path 99. It is the figure which expanded the part (aperture 98) circumference.
- a vane-type oil pump 90 shown in FIG. 5 includes an inner rotor 94 that rotates integrally with the shaft 20, and an outer rotor 95 that surrounds the outer periphery of the inner rotor 94.
- the inner rotor 94 and the outer rotor 95 are disposed inside the main body case 91. It is accommodated in a pump chamber 920 formed in the above.
- the space formed between the outer peripheral teeth of the inner rotor 94 and the inner peripheral teeth of the outer rotor 95 is the rotational axis X while periodically increasing or decreasing the volume when the inner rotor 94 rotates. Utilizing this displacement, the oil sucked from the suction port of the oil pump 90 is pressurized and discharged from the discharge port 960.
- the volume of the space becomes the smallest, so that the oil in the space is discharged from the discharge port 960.
- a plurality of spaces in the circumferential direction around the rotation axis intermittently pass through the discharge port 960, so that pulsation occurs in the oil discharged from the discharge port 960. Therefore, if the discharge port 960 is connected to the downstream discharge path 99 as it is, the pulsation is directly transmitted to the oil flowing through the downstream oil path 100.
- a ring-shaped pressure chamber 97 is provided adjacent to the discharge port 960, and the pulsation of oil discharged from the discharge port 960 is reduced in the pressure chamber 97. After that, the oil is supplied from the downstream discharge passage 99 to the oil passage 100 through the throttle 98 of the flow control valve.
- this throttle 98 has a function of further suppressing the pulsation of oil supplied to the downstream discharge passage 99, it serves as a movement resistance of oil moving from the pressure chamber 97 toward the downstream discharge passage 99.
- a drive source for example, an engine
- the present invention An inner rotor that rotates integrally with the drive shaft around the rotation shaft; An outer rotor that is installed in a loosely fitted state in a pump chamber formed in the housing, and meshed with a tooth portion provided on the outer periphery of the inner rotor, and a tooth portion provided on the inner periphery; A space portion formed adjacent to the pump chamber in the rotation axis direction and formed in a ring shape surrounding the rotation axis as seen from the rotation axis direction; A connection path connecting the pump chamber and the space, The inside of the housing extends in parallel to the rotation axis, one end in the longitudinal direction communicates with the space portion, and the other end opens at a position farther from the pump chamber than the space portion in the rotation axis direction.
- the discharge path is formed in a circular cross-sectional shape when viewed from the rotation axis direction, and is provided at a position straddling the inner side and the outer side across the outer periphery of the space portion viewed from the rotation axis direction,
- An oil pump in which the one end of the discharge path is provided at a position extending to the middle of the space portion when viewed from the radial direction of the rotating shaft, and the discharge path and the space portion are directly communicated with each other.
- the present invention by directly communicating the space part into which the oil pressurized in the pump chamber first flows and the discharge path that guides the pressurized oil supplied into the space part to the discharge port, There is no portion between the space portion and the discharge path that becomes resistance to movement of oil flowing from the space portion into the discharge path. Therefore, the part of this discharge path is also utilized as a part of the space part, and it can be understood that the volume of the space part is increased by the amount of this discharge path.
- the volume of the space portion increases, the effect of suppressing the pulsation of the pressurized oil flowing from the pump chamber is improved accordingly. Therefore, by configuring as described above, the volume of the space that can function as the space portion can be expanded without increasing the actual volume of the space portion, so that the pulsation of the pressurized oil can be further suppressed. .
- FIG. 1 is a diagram illustrating an oil pump 1 according to an embodiment, (a) is a cross-sectional view of the oil pump 1 cut along a rotation axis X, and (b) is a diagram in (a).
- FIG. 4 is an enlarged view around the pressure chamber 34, (c) is an enlarged view of the vicinity of the communication port 36 between the pressure chamber 34 and the discharge path 35, and (d) is an enlarged view of the pressure chamber 34 and the discharge path 35.
- FIG. 6 is a reference perspective view showing a state where the communication port is viewed from the pressure chamber side.
- the main body case 2 of the oil pump 1 is configured by assembling a housing 3 and a cover 4.
- a bottomed cylindrical pump chamber 31 is formed on the surface of the housing 3 facing the cover 4. After the cover 4 is assembled to the housing 3, the cover 4 is fixed to the housing 3 with bolts B.
- a sealed space of the pump chamber 31 is formed inside the case 2.
- a through hole 32 of the shaft 20 is formed at the center of the pump chamber 31, and the through hole 32 penetrates the housing 3 in the direction of the rotation axis X.
- One end 20 a of the shaft 20 passes through the through hole 32 and is located outside the main body case 2, and the one end 20 a side of the shaft 20 is rotatably supported by the through hole 32.
- the housing 3 has a cylindrical wall portion 33 that surrounds the through holes 32 at a predetermined interval.
- a ring-shaped pressure chamber 34 that surrounds the cylindrical wall portion 33 at a predetermined interval opens at the bottom 31 a of the pump chamber 31.
- An inner rotor 22 is spline-fitted and fixed to the outer periphery of a region of the shaft 20 located in the pump chamber 31. When the shaft 20 is rotated by a rotational driving force from a driving source (not shown), the shaft 20 and the inner rotor 22 are fixed. Are configured to rotate integrally around the rotation axis X.
- a ring-shaped outer rotor 23 is located on the radially outer side of the inner rotor 22 when viewed from the direction of the rotation axis X.
- the outer rotor 23 is located on the radially outer side of the inner rotor 22 with a tooth portion (not shown) provided on the inner periphery meshing with a tooth portion (not shown) provided on the outer periphery of the inner rotor 22.
- the outer rotor 23 is installed in a loosely fitted state on the inner periphery of the pump chamber 31.
- Ring-shaped wall members 24 and 25 are attached to both sides of the inner rotor 22 and the outer rotor 23 in the shaft 20, and the inner rotor 22 and the outer rotor 23 are sandwiched between the wall members 24 and 25.
- the pump assembly 21 is configured by sandwiching the inner rotor 22 and the outer rotor 23 between the wall members 24 and 25. In this state, the inner rotor 22 and the outer rotor 23 between the wall members 24 and 25 are The wall members 24 and 25 can rotate relative to the rotation axis X.
- pressurized oil is adjusted by an inner rotor 22 and an outer rotor 23 that rotate inside the pump assembly 21, and the pressurized oil is discharged from a discharge port 241 provided in the wall member 24. It has come to be.
- one end 20a of the shaft 20 is connected to the through hole 32 of the housing 3 from the cover 4 side.
- the shaft 20 and the pump assembly 21 are assembled to the housing 3.
- a through hole 41 is formed in the cover 4 at a position aligned with the shaft 20 assembled in the housing 3. Therefore, when the cover 4 is assembled to the housing 3, the other end 20 b of the shaft 20 protrudes to the outside of the main body case 2, and the other end 20 b side of the shaft 20 is rotatably supported by the through hole 41. Has been.
- the pump assembly 21 is sandwiched between the bottom 31a of the pump chamber 31 and the cover 4, and is disposed in the pump chamber 31 in a state where movement in the rotation axis X direction is restricted.
- an oil supply port (not shown) sucked through a strainer (not shown) opens on the surface facing the pump chamber 31.
- a discharge port 241 is provided through the wall member 24 in the rotation axis X direction. Communicates with the internal space of the pump assembly 21 and the pressure chamber 34 opened to the bottom 31 a of the pump chamber 31. Therefore, the oil pressurized in the pump assembly 21 is supplied into the pressure chamber 34 through the discharge port 241.
- the pressure chamber 34 has a ring shape surrounding the rotation axis X at a predetermined interval (see FIG. 2A), and is closer to the outer diameter of the pressure chamber 34 when viewed from the axial direction of the rotation axis X. In this position, one end 35 b side of the discharge path 35 extending in the direction of the rotation axis X in the housing 3 communicates with the pressure chamber 34.
- the discharge path 35 When viewed from the axial direction of the rotation axis X, the discharge path 35 has a circular cross-sectional shape (see FIG. 2B).
- the discharge path 35 In the housing 3, the discharge path 35 is viewed from the axial direction of the rotation axis X. It is provided at a position straddling the inner side and the outer side across the outer peripheral edge 34b of the pressure chamber 34. Therefore, when viewed from the axial direction of the rotation axis X, the virtual curve Lm extending on the extension of the outer peripheral edge 34b of the pressure chamber 34 and the virtual curve Ln extending on the extension of the inner circumference of the discharge passage 35 intersect each other.
- the discharge path 35 and the pressure chamber 34 intersect (communicate) (see FIG. 2A, region R1).
- the discharge path 35 is formed in a straight line parallel to the rotation axis X when viewed from the radial direction of the rotation axis X, and the other end side of the discharge path 35.
- the connection port 35a is open at a position farther from the pump chamber 31 than the pressure chamber 34 in the axial direction of the rotation axis X.
- One end 35 b of the discharge path 35 is located on the pump chamber 31 side from the bottom 34 a of the pressure chamber 34 by a length La extending to substantially the center of the pressure chamber 34 in the rotation axis X direction. Therefore, one end 35 b of the discharge path 35 is in direct communication with the pressure chamber 34, and an opening formed at the boundary between the discharge path 35 and the pressure chamber 34 becomes a communication port 36 between the discharge path 35 and the pressure chamber 34. ing.
- the discharge path in the axial direction of the rotation axis X is such that the opening area D2 of the communication port 36 is equal to or larger than the opening area D1 of the connection port 35a on the other end side of the discharge path 35 (D2 ⁇ D1).
- An intersection amount La between the pressure chamber 34 and the pressure chamber 34 and an intersection amount Lb between the discharge passage 35 and the pressure chamber 34 in the radial direction of the rotation axis X are set.
- the pressure chamber 34 and the discharge path 35 communicate with each other via a throttle 98, and the opening area of the throttle 98 is Since D3 is narrow, this throttle 98 becomes a resistance against the oil passing through the throttle 98, and the pressure loss when the oil passes through the throttle 98 is large.
- one end 35 b of the discharge path 35 is provided at a position extending to the middle of the pressure chamber 34 when viewed from the radial direction of the rotation axis X, and the discharge path 35 is connected to the pressure chamber 34 when viewed from the rotation axis X direction. Since the discharge passage 35 and the pressure chamber 34 are directly communicated with each other with the outer peripheral edge 34b sandwiched between the inner side and the outer side, the opening area D2 of the communication port 36 is the opening area in the case of the throttle 98. It is much wider than D3.
- the resistance as in the case where the throttle 98 is present does not act on the oil moving from the pressure chamber 34 through the communication port 36 toward the discharge passage 35, and the discharge passage 35 side is connected to the pressure chamber 35. It can be used as a space that continues to 34. In this case, it can be considered that the volume of the pressure chamber 34 provided for suppressing the pulsation of the oil is increased by the volume on the discharge path 35 side, and thus the effect of suppressing the pulsation by the increased volume. Improvement can be expected.
- An oil passage 100 extending to the pressure control valve V ⁇ b> 1 located on the downstream side of the oil pump 1 is connected to the connection port 35 a of the discharge passage 35.
- the inner diameter of the oil passage 100 and the inner diameter of the discharge passage 35 are made to coincide with each other so that the flow passage cross-sectional area does not become narrow at the connection portion between the oil passage 100 and the discharge passage 35. Therefore, not only the volume in the discharge path 35 but also the volume in the oil path 100 can be utilized as the volume of the pressure chamber 34.
- FIG. 3 shows (1) the relationship between the volume (pressure chamber volume) of the pressure chamber 34 and the size of pulsation, (2) the size of the opening area D2 (communication portion opening area) of the communication port 36, and the pulsation. It is a figure explaining the relationship between large and small, and (3) the relationship between the size of the opening area D2 (communication portion opening area) of the communication port 36 and the vehicle fuel efficiency.
- the magnitude of the volume V of the pressure chamber 34 in (1) and the magnitude of the opening area D2 of the communication port 36 in (2) are related to the magnitude of pulsation as a common item. Further, the magnitude of the pulsation in (2) and the quality of the vehicle fuel efficiency in (3) are related to the magnitude of the opening area D2 (communication opening area) of the communication port 36 as a common item.
- the relationship between the opening area D2 of the communication port 36 between the pressure chamber 34 and the discharge passage 35 and the relationship between pulsation are such that the opening area D2 of the communication port 36 becomes smaller regardless of the discharge amount of the oil pump 1.
- the smaller the pulsation the larger the pulsation. This is because the smaller the opening area D2, the higher the resistance acting on the oil when passing through the communication port 36, and the increase in resistance reduces pulsation.
- the opening area D2 is increased, the resistance acting on the oil is decreased, and as a result, the effect of reducing the pulsation is reduced, and the oil pulsation is transmitted to the oil in the discharge passage 35 without being reduced.
- the inner rotor 22 is rotated by a rotational driving force transmitted from a driving source such as an engine, the load with respect to the rotation of the inner rotor 22 becomes the load with respect to the driving source as it is, so that the load of the driving source increases as the load increases.
- the fuel consumption (vehicle fuel consumption) of a vehicle equipped with a drive source deteriorates. Therefore, the fuel efficiency of the vehicle deteriorates as the opening area D2 of the communication port 36 decreases, and the improvement increases as the opening area D2 increases.
- the applicant of the present application sets the volume V (pressure chamber volume) of the pressure chamber 34 and the opening area D2 (communication opening area) of the communication port 36 in a vehicle equipped with an automatic transmission that employs the oil pump 1.
- the fuel consumption characteristics, the pulsation characteristics in the oil pump 1 and the hydraulic response in the oil pump 1 are taken into consideration. Specifically, the fuel consumption characteristics are related to the load on the oil pump 1 determined according to the opening area D2 of the communication port 36, and the pulsation characteristics are determined by the opening area D2 of the communication port 36 and the volume V of the pressure chamber 34.
- the threshold value of each characteristic is determined, and the volume V (pressure chamber) of the pressure chamber 34 is set so as to satisfy the conditions determined according to the threshold value.
- Volume) and the opening area D2 (communication opening area) of the communication port 36 are set.
- FIG. 4 is a diagram illustrating the setting of the volume V (pressure chamber volume) of the pressure chamber 34 and the opening area D2 (communication opening area) of the communication port 36.
- the volume V of the pressure chamber 34 and the communication port 36 are illustrated. It is a figure explaining the characteristic line (target fuel consumption characteristic line, target pulsation characteristic line, target hydraulic pressure response characteristic line) considered in setting of opening area D2 of this.
- the vehicle fuel consumption threshold (minimum value of fuel consumption to be achieved) is calculated based on the contribution of the oil pump among the fuel consumption targets required for the vehicle equipped with the oil pump 1. ) Has been decided. Specifically, the torque increase amount due to the load of the oil pump 1 between the idle rotation of the oil pump 1 and a predetermined number of rotations (for example, 600 to 2000 rpm) is set to an arbitrary value (for example, 0.1 Nm) or less. This threshold value is obtained as the vehicle fuel consumption threshold value (see FIG. 3, vehicle fuel consumption threshold value), and the target fuel consumption characteristic (see FIG. 4) is determined from the obtained vehicle fuel consumption threshold value.
- the fuel consumption of the vehicle fluctuates mainly according to the opening area D2 (load of the oil pump 1) of the communication port 36, and does not greatly depend on the volume V of the pressure chamber 34. Therefore, the relationship between the volume V of the pressure chamber 34 and the opening area D2 of the communication port 36 having the target fuel consumption characteristic has linearity as shown in FIG.
- the opening area D2 of the communication port 36 when the opening area D2 of the communication port 36 is reduced, the load of the oil pump 1 is increased and the fuel consumption is deteriorated. Therefore, the volume V of the pressure chamber 34 and the communication port 36 are reduced based on FIG.
- the opening area D2 it is preferable that the opening area D2 of the communication port 36 is larger when viewed from the target fuel efficiency characteristic line.
- the target fuel consumption characteristic is an upper limit value of the load torque of the oil pump 1 in a vehicle equipped with the oil pump 1.
- the hydraulic response varies according to the volume V of the region functioning as the pressure chamber 34 (in the case of FIG. 1, the pressure chamber 34, the discharge path 35, and the oil path 100), and decreases as the volume V increases.
- a volume that satisfies the condition of the following formula (1) is obtained as a hydraulic response threshold (see FIG. 3, hydraulic response threshold), and the target hydraulic response characteristic is determined from the obtained threshold.
- the volume of the pressure chamber includes the volume of the pressure chamber 34, the discharge passage 35, and the oil passage 100.
- the relationship between the target hydraulic pressure response characteristic volume V and the opening area D2 of the communication port 36 has linearity as shown in FIG.
- the pressure chamber 34 and the opening area D2 of the communication port 36 are set based on FIG. It is preferable that the pressure chamber has a smaller volume as seen from the target hydraulic response characteristic line.
- the pulsation characteristics vary depending on the volume V of the region functioning as the pressure chamber 34 (in the case of FIG. 1, the pressure chamber 34, the discharge passage 35, and the oil passage 100) and the opening area D2 of the communication port 36.
- the pulsation magnitude is determined as a threshold value so as to be a predetermined noise level (db) or less during steady travel (FIG. 3, pulsation threshold),
- the target pulsation characteristic is determined from the obtained threshold value.
- M is an expansion coefficient S2 / S1
- S1 is a cross-sectional area on the input side of the communication port 36 (cross-sectional area of the pressure chamber 34)
- S2 is a cross-sectional area on the output side of the communication port 36
- La is the intersection length of the pressure chamber 34 and the one end 35b side of the discharge path 35 in the rotation axis X direction.
- the pulsation characteristic depends on the opening area D2 of the communication port 36 and the volume V of the pressure chamber
- the relationship between the volume V of the target pulsation characteristic and the opening area D2 of the communication port 36 is a curve as shown in FIG. Will have sex.
- the contribution to the reduction of pulsation is that the volume of the pressure chamber is larger than the opening area D2 of the communication port 36. Therefore, the volume V of the pressure chamber 34 and the opening area D2 of the communication port 36 are calculated based on FIG. In the case of setting, it is preferable that the pressure chamber has a larger volume as seen from the target pulsation characteristic line.
- the pressure chambers (the pressure chamber 34, the discharge passage 35, and the oil passage 100) are arranged so as to be in the region T (the hatched region in FIG. 4) surrounded by these three characteristic lines.
- the volume and the opening area D2 of the communication port 36 are set, so that the oil pump 1 can satisfy the fuel consumption characteristics, the pulsation characteristics, and the hydraulic response.
- the target pulsation characteristic is set to an upper limit value of the pulsation (oil vibration) of the oil pump 1 calculated based on noise to be suppressed as a vehicle equipped with the oil pump 1, and the target pulsation characteristic functions as a pressure chamber. It is expressed by an equivalent curve using the volume V of the space (in the case of FIG. 1, the pressure chamber 34, the discharge passage 35, and the oil passage 100) and the opening area D2 of the communication port 36 as parameters.
- the inner rotor 22 that rotates around the rotation axis X integrally with the shaft 20 (drive shaft);
- An outer rotor 23 that is installed in a loosely fitted state in a pump chamber 31 formed in the housing 3 and meshes with a tooth portion provided on the outer periphery of the inner rotor 22 and a tooth portion provided on the inner periphery;
- a pressure chamber 34 (space part) formed adjacent to the pump chamber 31 in the rotation axis X direction and formed in a ring shape surrounding the rotation axis X when viewed from the rotation axis X direction;
- a discharge port 241 connecting the pump chamber 31 and the pressure chamber 34;
- the housing 3 extends parallel to the rotation axis X, and one end 35 b in the longitudinal direction communicates with the pressure chamber 34, and the other end is located farther from the pump chamber 31 than the pressure chamber 34 in the rotation axis X direction.
- the discharge path 35 is formed in a circular cross-sectional shape when viewed from the rotation axis X direction, and is provided at a position straddling the inner side and the outer side across the outer periphery of the pressure chamber 34 viewed from the rotation axis X direction.
- One end 35b of the discharge path 35 is provided at a position extending halfway through the pressure chamber 34 when viewed from the radial direction of the rotation axis X, and the discharge path 35 and the pressure chamber 34 are in direct communication with each other.
- the pressure chamber 34 into which the oil pressurized by the pump chamber 31 side will flow in first, and the discharge path 35 which guides the pressurized oil supplied in the pressure chamber 34 to the connection port 35a. Due to the direct communication, there is no portion (for example, a throttle) that acts as a resistance to movement of oil flowing from the pressure chamber 34 into the discharge passage 35 between the pressure chamber 34 and the discharge passage 35. Therefore, the portion of the discharge path 35 is also utilized as a part of the pressure chamber 34, and it can be understood that the volume of the pressure chamber 34 is increased by the amount of the discharge path 35.
- the volume of the pressure chamber 34 increases, the effect of suppressing the pulsation of the pressurized oil flowing from the pump chamber 31 side is improved accordingly. Therefore, by configuring as described above, the volume of the space that can function as the pressure chamber 34 can be expanded without increasing the actual volume of the pressure chamber 34, thereby further suppressing the pulsation of the pressurized oil. Can do.
- the opening area D2 of the communication port 36 between the discharge path 35 and the pressure chamber 34 is set to be equal to or larger than the opening area D1 of the connection port 35a of the discharge path 35.
- the volume of the pressure chamber 34 and the opening area D2 of the communication port 36 are: In the table (FIG. 4) using the volume of the pressure chamber 34 and the opening area D2 of the communication port 36 as parameters, A target pulsation characteristic line that defines an allowable upper limit value of pulsation, which varies depending on the volume of the pressure chamber (pressure chamber 34, discharge passage 35, oil passage 100) and the opening area D2 of the communication port 36.
- a target fuel consumption characteristic line that defines a lower limit value of an allowable fuel consumption which is a fuel consumption that changes according to the opening area D2 of the communication port 36
- a target hydraulic response characteristic line that defines the lower limit of the allowable hydraulic response which is the hydraulic response in the oil pump that changes according to the volume of the pressure chamber (the pressure chamber 34, the discharge passage 35, and the oil passage 100).
- the volume and the opening area included in the region surrounded by are set respectively.
- the oil pump 1 which satisfy
- the target pulsation characteristic is set to the oil vibration upper limit value of the oil pump calculated based on noise to be suppressed for a vehicle equipped with the oil pump 1, and the target pulsation characteristic is a space functioning as a pressure chamber (FIG. 1).
- the volume V of the pressure chamber 34, the discharge passage 35, and the oil passage 100) and the opening area D2 of the communication port 36 are represented by an equivalent curve.
- the target pulsation characteristics can be determined based on past experimental data, etc., so there is no ambiguity as in the sensory test in determining whether pulsation is acceptable. Can be judged.
- the target fuel consumption characteristic is configured to be an upper limit value of the load torque of the load torque in the vehicle equipped with the oil pump 1.
- the deterioration of the vehicle fuel consumption resulting from the discharge load (discharge load) in an oil pump can be suppressed.
- the volume V of the space functioning as a pressure chamber in the case of FIG. 1, the pressure chamber 34, the discharge passage 35, the oil passage 100
- the opening area D ⁇ b> 2 of the communication port 36 that can suppress deterioration of the vehicle fuel consumption. Since it can be set, the volume of the space and the opening area D2 of the communication port 36 can be appropriately set according to the vehicle while suppressing the deterioration of the vehicle fuel consumption.
- the case where the pressure chamber 34, the discharge passage 35, and the oil passage 100 in FIG. 1 correspond to the space functioning as the pressure chamber is illustrated.
- the space (the pressure chamber 34 and the discharge passage 35) may be set to function as a pressure chamber.
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- Rotary Pumps (AREA)
Abstract
Description
このオイルポンプ90では、インナロータ94の外周の歯部がアウタロータ95の内周の歯部との間に形成している空間が、インナロータ94の回転時に、体積を周期的に増減させながら回転軸X回りに変位することを利用して、オイルポンプ90の吸入口から吸入したオイルを加圧して、排出口960から排出させる構成となっている。
そのため、排出口960をそのまま下流側の排出路99に接続すると、下流側の油路100を通流するオイルに脈動がそのまま伝わってしまう。
従来例にかかるベーン式のオイルポンプ90では、この排出口960に隣接してリング状の圧力室97を設けて、排出口960から排出されるオイルの脈動をこの圧力室97内で低減させたのち、流量制御弁の絞り98を通って、下流側の排出路99から油路100に供給するようにしている。
駆動軸と一体に回転軸回りに回転するインナロータと、
ハウジングに形成されたポンプ室内に遊嵌状態で設置されていると共に、前記インナロータの外周に設けた歯部に、内周に設けた歯部を噛合させたアウタロータと、
前記回転軸方向で前記ポンプ室に隣接して設けられていると共に、前記回転軸方向から見て、前記回転軸を囲むリング状に形成された空間部と、
前記ポンプ室と前記空間部とを接続する接続路と、
前記ハウジング内を前記回転軸に対して平行に延びると共に、長手方向における一端が前記空間部に連絡し、他端が、前記回転軸方向で前記空間部よりも前記ポンプ室から離れた位置に開口する吐出口とされた排出路と、を有するオイルポンプにおいて、
前記排出路を、前記回転軸方向から見て円形を成す断面形状で形成すると共に、前記回転軸方向から見た前記空間部の外周を挟んで内側と外側に跨がる位置に設け、
前記排出路の前記一端を、前記回転軸の径方向から見て前記空間部の途中まで及ぶ位置に設けて、前記排出路と前記空間部とを直接連通させた、オイルポンプ。
そのため、この排出路の部分もまた空間部の一部として活用されて、空間部の容積がこの排出路の分だけ大きくなったと捉えることができる。ここで、空間部の容積が増えると、ポンプ室から流入する加圧されたオイルの脈動を抑える効果がその分だけ向上する。
よって、上記のように構成することで、空間部の実際の容積を増やすこと無く、空間部として機能できる空間の容積を広げることができるので、加圧されたオイルの脈動をより抑えることができる。
図1は、実施の形態にかかるオイルポンプ1を説明する図であり、(a)は、オイルポンプ1を回転軸Xに沿って切断した断面図であり、(b)は、(a)における圧力室34周りの拡大図であり、(c)は、圧力室34と排出路35との連通口36近傍を拡大した拡大図であり、(d)は、圧力室34と排出路35との連通口36を、圧力室34側から見た状態を示す参考斜視図である。
なお、(c)では、従来例にかかるオイルポンプ90との違いを明確にするために、従来例にかかるオイルポンプ90で存在していた部位であって、実施の形態にかかるオイルポンプ1で無くなった部位(絞り98)を交差させたハッチングで示している。
シャフト20の一端20aは、貫通孔32を貫通して、本体ケース2の外部に位置しており、シャフト20の一端20a側は、貫通孔32で回転可能に支持されている。
シャフト20におけるポンプ室31内に位置する領域の外周には、インナロータ22がスプライン嵌合して固定されており、図示しない駆動源からの回転駆動力でシャフト20が回転すると、シャフト20とインナロータ22とが、回転軸X周りに一体回転するようになっている。
実施の形態では、壁部材24、25の間にインナロータ22およびアウタロータ23を挟み込んでポンプアッセンブリ21を構成しており、この状態において、これら壁部材24、25の間のインナロータ22およびアウタロータ23は、壁部材24、25に対して、回転軸X回りに相対回転可能となっている。
また、インナロータ22およびアウタロータ23を挟んで壁部材25の反対側に位置する壁部材24では、当該壁部材24を回転軸X方向に貫通して排出口241が設けられており、この排出口241は、ポンプアッセンブリ21の内部空間と、ポンプ室31の底31aに開口する圧力室34とを連通している。
そのため、ポンプアッセンブリ21内で加圧されたオイルは、排出口241を通って圧力室34内に供給されるようになっている。
そのため、回転軸Xの軸方向から見て、圧力室34の外周縁34bの延長上を延びる仮想曲線Lmと、排出路35の内周の延長上を延びる仮想曲線Lnとが交差する位置関係で、排出路35と圧力室34とが交差(連通)している(図2の(a)、領域R1参照)。
この排出路35の一端35bは、回転軸X方向における圧力室34の略中央に及ぶ長さLa分だけ、圧力室34の底34aからポンプ室31側に位置している。そのため、排出路35の一端35bは、圧力室34と直接連通しており、この排出路35と圧力室34の境界に形成された開口が、排出路35と圧力室34の連通口36となっている。
そのため、圧力室34から連通口36を通って排出路35に向けて移動するオイルに、絞り98が存在する場合のような抵抗が作用しないようになっており、排出路35側を、圧力室34に連なる空間として活用できるようになっている。
この場合、オイルの脈動を抑えるために設けられている圧力室34の容積が、排出路35側の容積分だけ広くなったと捉えることができるので、この広くなった容積分だけ、脈動を抑える効果の向上が期待できるようになっている。
そのため、排出路35内の容積だけで無く、油路100内の容積もまた、圧力室34の容積として活用できるようになっている。
図3は、(1)圧力室34の容積(圧力室容積)の大小と、脈動の大小との関係、(2)連通口36の開口面積D2(連通部開口面積)の大小と、脈動の大小との関係、(3)連通口36の開口面積D2(連通部開口面積)の大小と、車両燃費の善し悪しとの関係を、ひとつに纏めて説明する図である。
また、オイルポンプ1の吐出量が少ない場合(固有吐出量小)と多い場合(固有吐出量)とで、上記(1)~(3)における関係性が変化するので、上記(1)の場合には、同じ圧力室34の容積であっても、オイルポンプ1の吐出量に応じて脈動の大きさに幅があり、上記(2)の場合には、同じ連通口36の開口面積D2であっても、オイルポンプ1の吐出量に応じて脈動の大きさに幅があることを示している。さらに、上記(3)の場合には、同じ連通口36の開口面積D2であっても、オイルポンプ1の吐出量に応じて車両燃費に幅があることを示している。
図3に示すように、圧力室34の容積Vと脈動との関係は、オイルポンプ1の吐出量に拘わらず、圧力室34の容積Vが大きくなるほど脈動が小さくなり、圧力室34の容積Vが小さくなるほど、脈動が大きくなる。
圧力室34の容積Vが小さくなるほど、排出口241から吐出されるオイルの脈動が収まるまで、圧力室34内にオイルを保持できないからである。
また、圧力室34と排出路35との連通口36の開口面積D2の大小の関係と、脈動との関係は、オイルポンプ1の吐出量に拘わらず、連通口36の開口面積D2が小さくなるほど脈動が小さくなり、大きくなるほど脈動が大きくなる。
開口面積D2が小さくなるほど、連通口36を通過する際にオイルに作用する抵抗が高くなり、この抵抗の高まりが脈動を低減させるからである。また、開口面積D2が大きくなると、オイルに作用する抵抗が小さくなる結果、脈動を低減させる効果が低下して、オイルの脈動が低減されずに排出路35内のオイルに伝わるからである。
連通口36の開口面積D2と車両燃費との関係は、オイルポンプ1の吐出量に拘わらず、開口面積D2が小さくなるほど車両燃費が悪化し、開口面積D2が大きくなるほど向上する。
開口面積D2が小さくなるほど、連通口36を通過するオイルに作用する抵抗が大きくなり、オイルが連通口36を通過するために必要な吐出力が大きくなる。吐出力を大きくするためには、オイルポンプ1でのインナロータ22をより高回転で回転させる必要があり、この高回転で回転させるために必要なオイルポンプ1の作動負荷(インナロータの回転に必要な負荷)が大きくなる。
ここで、インナロータ22は、エンジンなどの駆動源から伝達される回転駆動力により回転するので、インナロータ22の回転に対する負荷は、そのまま駆動源に対する負荷となるので、負荷が大きくなるほど、駆動源の負荷が大きくなって、駆動源を搭載する車両の燃費(車両燃費)が悪化する。そのため、連通口36の開口面積D2が小さくなるほど車両燃費が悪化し、開口面積D2が大きくなるほど向上する。
具体的には、燃費特性は、連通口36の開口面積D2に応じて決まるオイルポンプ1での負荷に関係があり、脈動特性は、連通口36の開口面積D2と圧力室34の容積Vに関係があり、油圧応答性は、圧力室34の容積Vに関係があるので、これら各特性の閾値を決定し、閾値に応じて決まる条件を満たすように、圧力室34の容積V(圧力室容積)と、連通口36の開口面積D2(連通口開口面積)を設定している。
図4は、圧力室34の容積V(圧力室容積)と、連通口36の開口面積D2(連通口開口面積)の設定を説明する図であり、圧力室34の容積Vと、連通口36の開口面積D2の設定に当たり考慮される特性の特性線(目標燃費特性線、目標脈動特性線、目標油圧応答特性線)を説明する図である。
実施の形態では、燃費特性に対しては、オイルポンプ1を搭載した車両に求められている燃費目標のうち、オイルポンプの寄与分に基づいて、車両燃費の閾値(達成すべき燃費の最小値)が決められている。
具体的には、オイルポンプ1のアイドル回転から所定回転数(例えば、600~2000rpm)の間のオイルポンプ1の負荷によるトルク増加量が、任意の値(例えば、0.1Nm)以下となるような閾値を、車両燃費の閾値として求め(図3、車両燃費閾値参照)、求めた車両燃費の閾値から目標燃費特性(図4参照)を決定している。
ここで、車両燃費は、主に連通口36の開口面積D2(オイルポンプ1の負荷)に応じて変動し、圧力室34の容積Vには大きく依存しない。そのため、目標燃費特性の圧力室34の容積Vおよび連通口36の開口面積D2との関係は、図4に示すような直線性を持つことになる。
また、油圧応答性は、圧力室34として機能する領域(図1の場合には、圧力室34、排出路35、油路100)の容積Vに応じて変動し、容積Vが大きくなるほど低下する。
実施の形態では、下記式(1)の条件を満たす容積を、油圧応答性の閾値として求め(図3、油圧応答性閾値参照)、求めた閾値から、目標油圧応答特性を決定している。
オイルポンプ1の単位時間当たりの吐出量Q×目標油圧立ち上がり時間T
=低温時のオイルポンプ1の吐出量(l/min)≧圧力室の容積V・・・(1)
ここで、実施の形態にかかるオイルポンプ1の場合、圧力室の容積には、圧力室34と、排出路35と、油路100の容積が含まれている。
脈動特性は、圧力室34として機能する領域(図1の場合には、圧力室34、排出路35、油路100)の容積Vと、連通口36の開口面積D2に応じて変動する。
実施の形態では、車両走行時に脈動により発生する騒音に着目し、定常走行時の所定の騒音レベル(db)以下となるような、脈動の大きさを閾値として求め(図3、脈動閾値)、求めた閾値から、目標脈動特性を決定している。
ここで、Mは、膨張率S2/S1であり、S1は、連通口36の入力側の断面積(圧力室34の断面積)であり、S2は、連通口36の出力側の断面積(排出路35の断面積)であり、Laは回転軸X方向における排出路35の一端35b側と圧力室34の交差長である。
ここで、脈動の低減に対する寄与は、圧力室の容積のほうが、連通口36の開口面積D2よりも大きいので、この図4に基づいて圧力室34の容積Vと連通口36の開口面積D2を設定する場合には、目標脈動特性線からみて、圧力室の容積が大きくなる側であることが好ましい。
(1)シャフト20(駆動軸)と一体に回転軸X回りに回転するインナロータ22と、
ハウジング3に形成されたポンプ室31内に遊嵌状態で設置されていると共に、インナロータ22の外周に設けた歯部に、内周に設けた歯部を噛合させたアウタロータ23と、
回転軸X方向でポンプ室31に隣接して設けられていると共に、回転軸X方向から見て、回転軸Xを囲むリング状に形成された圧力室34(空間部)と、
ポンプ室31と圧力室34とを接続する排出口241と、
ハウジング3内を回転軸Xに対して平行に延びると共に、長手方向における一端35bが圧力室34に連絡し、他端が、回転軸X方向で圧力室34よりもポンプ室31から離れた位置に開口する吐出口(接続口35a)とされた排出路35と、を有するオイルポンプ1において、
排出路35を、回転軸X方向から見て円形の断面形状で形成すると共に、回転軸X方向から見た圧力室34の外周を挟んで内側と外側に跨がる位置に設け、
排出路35の一端35bを、回転軸Xの径方向から見て圧力室34の途中まで及ぶ位置に設けて、排出路35と圧力室34とを直接連通させた構成とした。
そのため、この排出路35の部分もまた圧力室34の一部として活用されて、圧力室34の容積がこの排出路35の分だけ大きくなったと捉えることができる。ここで、圧力室34の容積が増えると、ポンプ室31側から流入する加圧されたオイルの脈動を抑える効果がその分だけ向上する。
よって、上記のように構成することで、圧力室34の実際の容積を増やすこと無く、圧力室34として機能できる空間の容積を広げることができるので、加圧されたオイルの脈動をより抑えることができる。
圧力室34の容積と、連通口36の開口面積D2とをパラメータとしたテーブル(図4)において、
圧力室(圧力室34と、排出路35と、油路100)の容積と連通口36の開口面積D2に応じて変化する脈動であって、許容できる脈動の上限値を規定する目標脈動特性線と、
連通口36の開口面積D2に応じて変化する燃費であって、許容できる燃費の下限値を規定する目標燃費特性線と、
圧力室(圧力室34と、排出路35と、油路100)の容積に応じて変化するオイルポンプでの油圧応答性であって、許容できる油圧応答性の下限を規定する目標油圧応答特性線とで囲まれた領域内に含まれる容積と開口面積に、それぞれ設定されている構成とした。
よって、油圧応答性が良く、かつ脈動が抑えられていると共に、オイルポンプを搭載した車両の燃費の悪化を好適に防止できるオイルポンプ1を、本体ケース2内の圧力室34および排出路35の容積や、レイアウトを大きく変更すること無く提供できるので、オイルポンプ周りのレイアウト性が悪化することを好適に防止できる。
また、圧力室34の容積と連通口36の開口面積D3を、車両毎に適正な容積および面積に設定できる。
また、車両燃費の悪化を抑制できるような圧力室として機能する空間(図1の場合には、圧力室34、排出路35、油路100)の容積Vと、連通口36の開口面積D2を設定できるので、空間の容積と連通口36の開口面積D2を、車両燃費の悪化を抑制しつつ、車両に合わせて適切に設定できる。
Claims (5)
- 駆動軸と一体に回転軸回りに回転するインナロータと、
ハウジングに形成されたポンプ室内に遊嵌状態で設置されていると共に、前記インナロータの外周に設けた歯部に、内周に設けた歯部を噛合させたアウタロータと、
前記回転軸方向で前記ポンプ室に隣接して設けられていると共に、前記回転軸方向から見て、前記回転軸を囲むリング状に形成された空間部と、
前記ポンプ室と前記空間部とを接続する接続路と、
前記ハウジング内を前記回転軸に対して平行に延びると共に、長手方向における一端が前記空間部に連絡し、他端が、前記回転軸方向で前記空間部よりも前記ポンプ室から離れた位置に開口する吐出口とされた筒状の排出路と、を有するオイルポンプにおいて、
前記ハウジングにおいて前記排出路を、前記回転軸方向から見て、前記排出路の一部が前記空間部の外周よりも内側で開口する位置に設け、
前記排出路の前記一端を、前記回転軸の径方向から見て前記空間部の途中まで及ぶ位置に設けて、前記排出路と前記空間部とを直接連通させた、オイルポンプ。 - 前記排出路と前記空間部の連通部における開口面積は、前記排出路の吐出口の開口面積と同一以上に設定されている、請求項1に記載のオイルポンプ。
- 前記空間部の容積と、前記連通部の開口面積との大きさは、
前記空間部の容積と前記連通部の開口面積とをパラメータとしたテーブルにおいて、
前記空間の容積と前記連通部の開口面積に応じて変化する脈動であって、許容できる脈動の上限値を規定する目標脈動特性線と、
前記連通部の開口面積に応じて変化する燃費であって、許容できる燃費の下限値を規定する目標燃費特性線と、
前記空間部の容積に応じて変化するオイルポンプでの油圧応答性であって、許容できる油圧応答性の下限を規定する目標油圧応答特性とで囲まれた領域内に含まれる容積と開口面積に、それぞれ設定されている構成とした、請求項1または請求項2に記載のオイルポンプ。 - 前記目標脈動特性は、オイルポンプを搭載した車両として抑えるべきノイズにより算出されたオイルポンプの油振上限値に設定されており、前記目標脈動特性は、前記空間の容積と前記連通部の開口面積をパラメータとした等価曲線で表現される、請求項3に記載のオイルポンプ。
- 前記目標燃費特性は、オイルポンプを搭載した車両における負荷トルクのオイルポンプ負担分の上限値である、請求項3または請求項4に記載のオイルポンプ。
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US15/560,674 US10662942B2 (en) | 2015-03-26 | 2016-02-16 | Oil pump |
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Application Number | Priority Date | Filing Date | Title |
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JP2015-063701 | 2015-03-26 | ||
JP2015063701A JP6381469B2 (ja) | 2015-03-26 | 2015-03-26 | オイルポンプ |
Publications (1)
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WO2016152319A1 true WO2016152319A1 (ja) | 2016-09-29 |
Family
ID=56977209
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PCT/JP2016/054355 WO2016152319A1 (ja) | 2015-03-26 | 2016-02-16 | オイルポンプ |
Country Status (6)
Country | Link |
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US (1) | US10662942B2 (ja) |
EP (1) | EP3276176A4 (ja) |
JP (1) | JP6381469B2 (ja) |
KR (1) | KR101913532B1 (ja) |
CN (1) | CN107407274B (ja) |
WO (1) | WO2016152319A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111293U (ja) * | 1980-01-29 | 1981-08-28 | ||
JPH0942165A (ja) * | 1995-07-26 | 1997-02-10 | Kayseven Co Ltd | トロコイドポンプ |
JP2014234783A (ja) * | 2013-06-04 | 2014-12-15 | 株式会社ミクニ | 流体ポンプ |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3127843A (en) * | 1960-03-22 | 1964-04-07 | Robert W Brundage | Hydraulic pump or motor |
JP3394544B2 (ja) | 1991-11-05 | 2003-04-07 | 株式会社デンソー | ギヤポンプ |
JP3576370B2 (ja) * | 1998-03-20 | 2004-10-13 | 川崎重工業株式会社 | オイルポンプ |
US6106240A (en) * | 1998-04-27 | 2000-08-22 | General Motors Corporation | Gerotor pump |
US7695259B2 (en) * | 2006-09-21 | 2010-04-13 | Eaton Corporation | Rotary fluid pressure device with modular multi-speed control mechanism |
JP5141956B2 (ja) * | 2007-12-25 | 2013-02-13 | アイシン精機株式会社 | 電動ポンプ |
WO2011016467A1 (ja) * | 2009-08-04 | 2011-02-10 | 株式会社ジェイテクト | 電動ポンプユニット |
US9624929B2 (en) * | 2012-12-21 | 2017-04-18 | Lg Innotek Co., Ltd. | Electric pump |
CN203161524U (zh) * | 2013-02-22 | 2013-08-28 | 毕晴春 | 内啮合齿轮泵 |
JP2014173587A (ja) | 2013-03-13 | 2014-09-22 | Hitachi Automotive Systems Ltd | 内接歯車ポンプ |
-
2015
- 2015-03-26 JP JP2015063701A patent/JP6381469B2/ja active Active
-
2016
- 2016-02-16 CN CN201680011617.0A patent/CN107407274B/zh active Active
- 2016-02-16 EP EP16768222.8A patent/EP3276176A4/en not_active Withdrawn
- 2016-02-16 US US15/560,674 patent/US10662942B2/en active Active
- 2016-02-16 WO PCT/JP2016/054355 patent/WO2016152319A1/ja active Application Filing
- 2016-02-16 KR KR1020177021772A patent/KR101913532B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111293U (ja) * | 1980-01-29 | 1981-08-28 | ||
JPH0942165A (ja) * | 1995-07-26 | 1997-02-10 | Kayseven Co Ltd | トロコイドポンプ |
JP2014234783A (ja) * | 2013-06-04 | 2014-12-15 | 株式会社ミクニ | 流体ポンプ |
Non-Patent Citations (1)
Title |
---|
See also references of EP3276176A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP3276176A4 (en) | 2018-04-11 |
CN107407274B (zh) | 2019-04-12 |
KR20170102941A (ko) | 2017-09-12 |
US20180106251A1 (en) | 2018-04-19 |
US10662942B2 (en) | 2020-05-26 |
JP2016183596A (ja) | 2016-10-20 |
KR101913532B1 (ko) | 2018-10-30 |
CN107407274A (zh) | 2017-11-28 |
JP6381469B2 (ja) | 2018-08-29 |
EP3276176A1 (en) | 2018-01-31 |
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