CN106969251B - A kind of flow divider and its hydraulic system of lubrication for vehicle - Google Patents
A kind of flow divider and its hydraulic system of lubrication for vehicle Download PDFInfo
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- CN106969251B CN106969251B CN201710170013.7A CN201710170013A CN106969251B CN 106969251 B CN106969251 B CN 106969251B CN 201710170013 A CN201710170013 A CN 201710170013A CN 106969251 B CN106969251 B CN 106969251B
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- lubricating oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/74—Features relating to lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/385—Central lubrication systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/18—Electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2280/00—Valves
- F16N2280/04—Variable-flow or proportional valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The present invention provides a kind of flow dividers and its hydraulic system of lubrication for vehicle gear box, are related to hydraulic device.Flow divider includes: valve body, and internal to form through portion, one end of the through portion is entrance, and the other end is and exports；Plurality of passages, respectively with the entrance and the outlet, for making lubricating oil be circulated to the lubricant oil way of the driving member；Moving member is installed in the through portion, and by the mobile a part closing made in a plurality of channel or access, the movement of the moving member is in response to the lubricating oil pressure towards the driving member；And elastic component, being installed at the moving member can push its movement to reset, and the pressure of the lubricating oil can be greater than the elastic force of the elastic component.On the one hand manufacture installation cost is reduced；On the other hand, the consumption to vehicle energy itself is reduced as far as possible.
Description
Technical Field
The invention relates to a hydraulic device, in particular to a flow dividing valve for a vehicle and a lubricating hydraulic system thereof.
Background
Hybrid vehicles are rapidly developing due to their energy-saving and environmentally friendly characteristics. Most of the conventional hybrid vehicles are driven by an internal combustion engine and an electric motor in a hybrid manner. The electric motor can be used for driving in urban and short-distance situations, the internal combustion engine can be used for driving in long-distance situations, and the internal combustion engine and the electric motor can be used for driving simultaneously when climbing a slope or needing to start quickly. Various hybrid control techniques improve the power characteristics of the vehicle, reduce engine displacement, and reduce fuel consumption and exhaust emissions.
At present, hybrid transmissions of hybrid vehicles are formed by mounting electric drive components on a conventional transmission.
Double clutch transmissions are the fastest growing type of automotive transmissions in recent years. The high-efficiency manual transmission has the high efficiency of the manual transmission, and the uninterrupted power output and comfort of the automatic transmission are realized; is a preferred structure of the modern hybrid vehicle type gearbox.
The existing hybrid drive double-clutch transmission is cooled and lubricated by an electric lubricating oil pump. For lubricating additional electrically driven components, the methods generally adopted in the prior art are: i) installing a lubricating oil pump for lubricating the electric driving part; ii) adding an electro-hydraulic control valve to control the flow of lubrication to the electrically driven component in response to the electrically driven component lubrication demand; and iii) increasing the flow of a lubricating oil pump of the original gearbox, and shunting the flow of the pump to an electric drive component for lubrication according to a fixed proportion. The measures i) and ii) above not only increase the cost, but also require redesign of the transmission controller, making the development and design more involved. The above mentioned measure iii) requires the development of a new larger electric oil pump and consumes more motor power, reducing the overall gearbox efficiency.
Disclosure of Invention
One object of the present invention is to provide a splitter valve for a hybrid vehicle transmission lubrication hydraulic system that distributes oil pump flow to electrically driven components in different proportions according to vehicle drive mode for efficient lubrication and heat dissipation of the electrically driven components without increasing the existing oil pump displacement.
It is a further object of the present invention to reduce the cost of the lubricating oil system of a hybrid dual clutch transmission.
It is a further object of the present invention to reduce the energy consumption of the lubricating oil system of a hybrid dual clutch transmission on its own during operation.
In particular, the present invention provides a flow divider valve for a vehicle, the vehicle being an electrically driven hybrid vehicle having a dual clutch transmission, the flow divider valve being adapted to regulate the flow of lubricating oil to between the dual clutch and a respective electrically driven component of the transmission, the flow divider valve being mounted at a lubricating oil circuit to the electrically driven component,
the flow divider valve includes:
the valve body is internally provided with a through part, one end of the through part is an inlet, and the other end of the through part is an outlet;
a plurality of passages respectively communicating with the inlet and the outlet for circulating lubricating oil to a lubricating oil passage of the electric drive component;
a moving member mounted within the through-portion, moving to close or open a portion of the plurality of channels, the movement of the moving member being responsive to the pressure of the lubricating oil to the electrically driven component; and
the elastic piece is arranged at the moving piece and can push the moving piece to move and reset, and the pressure of the lubricating oil can be greater than the elastic force of the elastic piece;
when the lubricating oil pressure is greater than the elastic force of the elastic part, the moving part is pushed by the lubricating oil to enable one part of the channels to be closed, and the other part of the channels keeps a passage; or,
when the lubricating oil pressure is less than the elastic force of the elastic member, the moving member is pushed by the elastic member to restore a part of the plurality of channels and maintain the passage.
Further, the flow dividing valve is also provided with a sleeve part for limiting the reciprocating movement of the moving part in the flow dividing valve along the axial direction of the sleeve part, the sleeve part is installed in the through part, the inner wall of the through part at the inlet of the flow dividing valve and the outer wall of one end of the sleeve part are provided with cavities, the lubricating oil can enter one end of the sleeve part so that the lubricating oil can push the moving part to move along the axial direction of the sleeve part, and the inner part of the other end of the sleeve part is communicated with the outlet of the through part;
the plurality of channels are a plurality of first through holes arranged on the side wall of the sleeve part, the plurality of channels are arranged in at least two groups, the at least two groups are sequentially arranged along the moving direction of the moving part, the plurality of channels can communicate the inside of the other end of the sleeve part with the through part at the cavity,
the moving part is a columnar part and is matched with the sleeve part;
preferably, each set of said plurality of channels is disposed around the circumference of said sleeve member;
preferably, the plurality of channels are arranged in two groups, one of the two groups is a first through hole and is arranged close to the other end of the sleeve member, and the other of the two groups is two first through holes arranged around the circumference of the sleeve member and is arranged far away from the other end of the sleeve member.
Further, the flow divider also has
The inlet baffle is used for limiting the moving element to move in the sleeve element and is arranged at one end of the sleeve element, and the inlet baffle is provided with a second through hole for enabling the lubricating oil to enter the sleeve element from the outside of one end of the sleeve element; and
the outlet baffle is used for limiting the moving element to move in the sleeve element and is arranged at the other end of the sleeve element, and the outlet baffle is provided with a third through hole used for communicating the other end of the sleeve element with the outlet of the flow divider;
the end part of the moving part close to the other end of the sleeve part is arranged at a distance from the inner wall of the sleeve part, so that the other part of the channels still keeps a passage when the moving part is jointed with the other end of the sleeve part;
preferably, the elastic element is a spring element which is connected with the moving element and the other end of the sleeve element;
preferably, the moving member is a stepped shaft, the diameters of the moving member are sequentially increased in a direction from the other end of the sleeve member toward one end of the sleeve member, and the moving member is a cylindrical portion having three sections;
preferably, said one end of said sleeve member is disposed towards said inlet port to facilitate the rapid ingress of said lubricating oil into said one end of said sleeve member.
Furthermore, the through part positioned at the inlet is a stepped hole with three sections of different diameters, the diameters of the stepped hole are gradually reduced from the inlet to the outlet, and the sleeve part is matched with the middle sections of the three sections of stepped holes with different diameters;
the inlet baffle is riveted and fixed with the valve body at the inlet.
Further, the electric driving component comprises a driving motor, a plurality of gears for transmitting the power of the driving motor, and a plurality of bearings for reducing friction force during the transmission of the power of the driving motor by the plurality of gears.
In addition, the invention also provides a lubricating hydraulic system with the flow dividing valve, and the lubricating hydraulic system is provided with
An oil sump for providing lubricating oil to the system;
the pump body is used for driving the lubricating oil to enter the double clutch and the electric drive component and regulating the flow of the lubricating oil entering the system, the inlet of the pump body is communicated with the oil pool, and the outlet of the pump body is respectively communicated with the double clutch and the electric drive component; and
the flow dividing valve is used for adjusting the flow of the lubricating oil flowing between the double clutch and the electric drive component, and is arranged at a communication part of the pump body for driving the lubricating oil to enter the electric drive component.
Further, the pump body is an electric hydraulic pump, is located the oil pond with intercommunication department between the pump body installs the oil absorption filter, by the pump body extremely cooler and pressure oil filter are installed in proper order to the intercommunication department of double clutch.
Furthermore, the flow divider is of a pipe head-shaped structure and is arranged at the outlet of the pump body or outside the box body of the gearbox,
preferably, the flow dividing valve is of an L-shaped pipe head structure, and the through part is an L-shaped pipeline;
preferably, the flow dividing valve is mounted at the outlet of the pump body or outside the box body of the gearbox in a threaded connection mode.
Further, the action of the pump body to increase the flow of lubricating oil into the system is responsive to the gearbox shifting event or to the engine drive of the vehicle and the temperature of the lubricating oil in the dual clutch and in the electrically driven components being above a set value.
Further, the gearbox is a seven-gear electrically driven hybrid gearbox with a double clutch.
In the process of realizing the flow dividing valve and the lubricating hydraulic system thereof, the flow dividing valve and the lubricating hydraulic system thereof only need to adjust the flow of the lubricating oil in the system, fully utilize the principles of unchanged flow area, increased flow speed and increased liquid pressure in hydrodynamics, and simultaneously combine the elastic part, the plurality of channels and the moving part to realize the flow control of the lubricating oil flowing to the electric drive part, thereby providing another brand new scheme different from the prior art. The movement of the moving part responds to the pressure of lubricating oil to the electric driving part, so that the automatic adjustment of the flow of the lubricating oil flowing to the electric driving part is realized, and compared with a complex adjustment mode in the prior art, the method greatly reduces the manufacturing and installation cost on one hand, and simultaneously reduces the research and development design of the complex adjustment mode; on the other hand, in the process of regulating the flow of the lubricating oil flowing to the electric drive component, the consumption of the energy of the vehicle is reduced as much as possible, so that the energy conservation and the environmental protection are further realized.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic cross-sectional view of the diverter valve according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a lubricated hydraulic system having the diverter valve shown in FIG. 1;
fig. 3 is a graph showing a distribution of the flow rate of the lubricating oil in the flow divider.
Detailed Description
Fig. 1 is a schematic cross-sectional view of the diverter valve according to one embodiment of the present invention. Fig. 2 is a schematic diagram of a lubricated hydraulic system having the diverter valve shown in fig. 1. Referring to fig. 2, a flow divider valve 5 for a hybrid vehicle is installed in a transmission having a dual clutch 4. The splitter valve 5 serves to distribute the flow of lubricating oil to the space between the double clutch 4 and the electrically driven part 2. The flow dividing valve 5 is installed at a lubricating oil path to the electric drive part 2. The gearbox may be a seven-gear electrically driven hybrid gearbox with a double clutch 4.
As mainly illustrated in fig. 2, the lubrication hydraulic system having the flow dividing valve 5 may include: an oil sump 11 and a pump body 13. The oil sump 11 is used to provide lubricating oil for the system. The pump body 13 is used to drive the lubricant into the double clutch 4 and the electrically driven part 2 and to regulate the flow of lubricant into the system. The inlet of which is connected to the oil sump 11 and the outlet of which is connected to the double clutch 4 and the electric drive 2, respectively. The flow divider valve 5 is mounted at the communication portion of the pump body 13 that drives the lubricating oil into the electrically driven part 2.
As mainly illustrated in fig. 1, the flow dividing valve 5 may include: a moving member 54, an elastic member 55, and a plurality of channels 51. The plurality of passages 51 are for circulating the lubricating oil to the lubricating oil passage of the electric drive component 2. The plurality of passages 51 communicate with the inlet and outlet of the flow dividing valve 5, respectively. The elastic member 55 may push the moving member 54 of the diverting valve 5 to move and return, and the pressure of the lubricating oil may be greater than the elastic force of the elastic member 55. The moving member 54 is installed in the through portion 52, and can close or pass a part of the plurality of passages 51. The movement of the moving member 54 is responsive to the pressure of the lubricating oil to the electrically driven component 2. When the pressure of the lubricating oil is greater than the elastic force of the elastic member 55, the moving member 54 is pushed by the lubricating oil so that one portion of the plurality of passages 51 is closed and the other portion of the plurality of passages 51 remains open; when the pressure of the lubricating oil is smaller than the elastic force of the elastic member 55, the moving member 54 is pushed by the elastic member 55 to restore the closed portions of the plurality of passages 51 and maintain the passage.
Continuing with fig. 1, this may be performed by communicating lubricant to the electrically driven component 2 via the diverter valve 5 (see fig. 2) when the vehicle is being driven using the drive motor. At this time, the pressure of the lubricating oil is smaller than the elastic force of the elastic member 55, and the elastic member 55 keeps the moving member 54 of the flow dividing valve 5 in the reset state. Referring to fig. 2, when the dual clutch 4 is in operation or the temperature in the transmission is too high, the pump body 13 increases the flow rate of the lubricating oil to the system, and because the outlet oil passage of the pump body 13 has a certain flow resistance, the outlet pressure of the pump body 13 increases when the flow rate increases. So that the pressure of the lubricating oil flowing to the electric drive part 2 is increased, referring to fig. 1, when the pressure of the lubricating oil is greater than the elastic force of the elastic member 55, the moving member 54 is pushed by the lubricating oil so that one portion of the plurality of passages 51 is closed while the other portion of the plurality of passages 51 remains open, referring to fig. 2, thereby reducing the flow rate of the lubricating oil to the electric drive part 2 and simultaneously increasing the flow rate of the lubricating oil to the dual clutch 4. The effect of effectively lubricating and cooling the double clutches 4 is realized.
Referring to fig. 1, in the above process, it is only necessary to adjust the flow rate of the lubricating oil in the system, and the principles of "no change in flow area, increased flow rate, and increased liquid pressure" in fluid mechanics are fully utilized, and simultaneously, in combination with the elastic member 55, the plurality of channels 51, and the moving member 54, the flow rate of the lubricating oil flowing to the electrically driven component 2 (see fig. 2) is controlled, and another completely new scheme different from the prior art is proposed. The movement of the moving member 54 is in response to the oil pump outlet pressure, so that the flow of the lubricating oil flowing to the electrically driven part 2 is automatically adjusted, and compared with a complex adjusting mode in the prior art, the flow dividing valve reduces the manufacturing and installation cost and simultaneously reduces the research and development design of the complex adjusting mode; on the other hand, in the process of adjusting the flow of the lubricating oil flowing to the electric drive component 2, the discharge capacity of the oil pump is not increased, and the energy consumption of the transmission oil pump is reduced, so that the energy conservation and the environmental protection are realized.
Continuing with fig. 1, the diverter valve 5 may further have a valve body 56, a sleeve member 57, and a plurality of passages 51. The valve body 56 has a through portion 52 therein. The through portion 52 is used to flow the lubricating oil from the inlet of the flow dividing valve 5 to the outlet thereof. The through ends of the through portion 52 are an inlet and an outlet of the flow dividing valve 5, respectively, wherein one end of the mounting sleeve 57 is the inlet and the other end is the outlet. The sleeve member 57 serves to restrict the moving member 54 from reciprocating in its interior in the axial direction of the sleeve member 57. The sleeve member 57 is fitted into the through portion 52. A cavity is provided between the inner wall of the through portion 52 at the inlet of the diverter valve 5 and the outer wall at one end of the sleeve member 57. Lubricating oil can enter one end of the sleeve member 57 so that it can urge the moving member 54 to move in the axial direction of the sleeve member 57. The other end of the sleeve member 57 is internally communicated with the outlet of the through portion 52. In this embodiment, one end of the sleeve member 57 is an inlet end near the through portion 52, and the other end is an opposite end.
Continuing with fig. 1, the plurality of channels 51 may be a first plurality of through-holes opening into the sidewall of the sleeve member 57. The plurality of channels 51 are arranged in at least two groups. At least two sets are sequentially arranged along the moving direction of the moving member 54. A plurality of passages 51 may communicate the interior of the other end of the sleeve member 57 with the through portion 52 at the cavity. The moving member 54 may be a cylindrical member that mates with the sleeve member 57.
In an embodiment not shown in the drawings of the specification, each plurality of channels 51 is arranged around the circumference of the sleeve member 57.
Preferably, the flow divider 5 has an L-shaped pipe head structure, and the penetrating portion 52 is an L-shaped pipe.
Preferably, the diverter valve 5 is mounted by means of a threaded connection at the outlet of the pump body 13 or outside the casing of the gearbox.
Continuing with fig. 1, preferably, the plurality of channels 51 may be provided in two sets, one of the sets being a first through hole and being provided adjacent the other end of the sleeve member 57. The other of the two sets is two first through holes formed around the circumference of the sleeve member 57. And is located away from the other end of the sleeve member 57. Preferably, the elastic member 55 is a spring member, which is connected to the moving member 54 and the other end of the sleeve member 57.
This may be performed such that, when the pressure of the lubricating oil is smaller than the elastic force of the elastic member 55, the elastic member 55 keeps the moving member 54 inside the sleeve member 57 at one end of the sleeve member 57. The lubricating oil enters through the inlet and flows through the plurality of passages 51 at the cavity between the outer wall of the sleeve member 57 and the through portion 52, and then flows toward the inside of the other end of the sleeve member 57 to the outlet. When the double clutch 4 is in operation or the temperature in the transmission is too high, the pump body 13 increases the flow rate of the lubricating oil to the system, so that when the pressure of the lubricating oil is greater than the elastic force of the elastic member 55, the moving member 54 is pushed by the lubricating oil and moves towards the other end of the sleeve member 57, so that at least one group of the plurality of channels 51 in at least two groups is closed, and the plurality of channels 51 in at least two groups are kept open. In this embodiment, 51B is closed and 51A maintains a passageway. Thereby reducing the flow of lubricating oil to the electric drive component 2 and at the same time increasing the flow of lubricating oil to the double clutch 4. The effect of effectively lubricating and cooling the double clutches 4 is realized.
In the above process, the sleeve 57 and the channel 51 are through holes formed in the side wall of the sleeve 57, the elastic member 55 is a spring member, and the moving member is a cylindrical member, so that the structure is simple, and the manufacturing and installation are convenient. Therefore, the flow divider greatly facilitates the design and the reconstruction of the flow divider and the subsequent manufacturing and assembly while realizing the automatic flow adjustment. Thereby greatly reducing the cost.
Continuing with fig. 1, the diverter valve 5 further has an inlet baffle 58 and an outlet baffle 53. An inlet stop 58 for limiting movement of the displacement member 54 within the sleeve member 57 is mounted at one end of the sleeve member 57. The inlet baffle 58 is provided with a second through hole 581 for allowing the lubricant to enter the interior of the sleeve member 57 from the outside. The outlet shutter 53 for restricting the movement of the moving member 54 within the sleeve member 57 is mounted at the other end of the sleeve member 57. The outlet baffle 53 is opened with a third through hole 531 for communicating the other end of the sleeve 57 with the outlet of the flow dividing valve 5. The end of the moving member 54 adjacent the other end of the sleeve member 57 is spaced from the inner wall of the sleeve member 57 so that another portion of the plurality of channels 51 remains open when the moving member 54 engages the other end of the sleeve member 57. That is, 51B of the plurality of channels 51 is closed, and 51A remains a passage.
In fig. 1, reference numeral 19 denotes a transmission case, and reference numeral 18 denotes a lubricating oil path leading to the double clutch 4.
Preferably, the moving member 54 is a stepped shaft, the diameter of the moving member 54 increases in sequence in a direction from the other end of the sleeve member 57 toward one end of the sleeve member 57, and the moving member 54 is a cylindrical portion having three stages.
Preferably, one end of the sleeve member 57 is disposed toward the inlet to facilitate the rapid entry of lubricant into the end of the sleeve member 57. It should be noted that the moving member 54 may be a spool.
The inlet baffle 58 and the outlet baffle 53 are respectively provided with a second through hole 581 and a third through hole 531, so that the moving member 54 is limited to move in the sleeve member 57, and at the same time, it can be effectively ensured that the lubricating oil can enter one end of the sleeve member 57 and push the moving member 54 to move, and when the moving member 54 moves to the other end of the sleeve member 57 and is engaged with the other end of the sleeve member 57, another part of the plurality of channels 51 still keeps a passage.
Continuing with fig. 1, further, the through portion 52 at the inlet is a stepped hole with three sections of different diameters, the diameters of the stepped hole decrease from the inlet to the outlet, and the sleeve 57 is engaged with the middle section of the stepped hole with three sections of different diameters;
an inlet baffle 58 is riveted to the valve body 56 at the inlet.
Due to the structure of the stepped hole, the positioning of the sleeve member 57 is facilitated, the sleeve member 57 is convenient to mount and fix, and the positioning is accurate. And the stepped hole is convenient to process and manufacture.
As explained in conjunction with fig. 2, further, the electric driving part 2 includes a driving motor, a plurality of gears for transmitting power of the driving motor, and a plurality of bearings for reducing friction during transmission of power of the driving motor by the plurality of gears. The lubricating oil flows to the plurality of gears through the first branch 21, and the lubricating oil flows to the plurality of bearings through the second branch 22.
Further to the description with reference to fig. 2, in this system, the pump body 13 is an electric hydraulic pump. An oil suction filter is installed at a communication part between the oil pool 11 and the pump body 13. A cooler and a pressure oil filter are sequentially arranged at the communication part from the pump body 13 to the double clutch 4.
Further to the description with reference to fig. 2, in the system, the diverter valve 5 is in a pipe head structure and is installed at the outlet of the pump body 13 or outside the box body of the gearbox.
Continuing with fig. 2, further, in this system, the action of the pump body 13 to increase the flow of lubricant into the system is responsive to the shifting of the gearbox or to the driving of the vehicle engine and to the temperature of the lubricant in the double clutch 4 and in the electrically driven part 2 being higher than a set value.
As explained in connection with fig. 3, the entire gearbox does not require a too large lubricant flow (typically less than 3L/min) when the vehicle is driven by the drive motor, but the electrically driven component 2 may require a lubricant flow of up to 1.5L/min. At this time, the pump body 13 is under low pressure, and the moving member 54 is stopped at the right position by the elastic member 55. The lubricant from the outlet of the pump body 13 flows through the plurality of passages 51 in the sleeve member 57 to the electric drive unit 2. The flow-through areas of the channels 51 are such that the flow of lubrication Q of the electrically driven component 2 is obtainedhFlow rate Q to the pump body 13pIs a predetermined ratio k1Namely:
Qh＝k1Qp Qp＜Qo
k1the lubricating large shunt ratio of the electric drive component 2 is generally 0.2-0.5.
QoThe pump flow is switched in proportion by the flow dividing valve 5, namely the flow flowing to the double clutches 4 is generally 3-10L/min.
When the gearbox is shifted or the vehicle is driven by the engine and the temperature of the lubricating oil is ultrahigh, the friction plate of the double clutch 4 needs to be cooled by a large flow (generally more than 10L/min). The gearbox control unit commands the pump body 13 to increase the flow of lubricating oil. Because the outlet oil passage of the pump body 13 has certain flow resistance, the outlet pressure of the pump body 13 is increased when the flow rate is increased. When the pump body 13 is pressurized, as shown in fig. 1, the pressure of the lubricant acting on the right end of the moving member 54 overcomes the elastic force of the elastic member 55, and the moving member 54 is moved to the left. As shown in fig. 1, the moving member 54 moved to the left closes a part of the plurality of passages 51, leaving only another part of the plurality of passages 51 to supply the flow to the electric drive part 2. Due to the reduction of the remaining passages in the plurality of channels 51, the flow rate supplied to the electric drive part 2 is greatly reduced (generally less than 0.3L/min), and most of the lubricating oil flow rate is distributed to the double clutch 4, ensuring that the double clutch 4 has sufficient lubricating and cooling flow rates without increasing the power of the pump body 13.
The flow-through areas of the channels 51 are such that the flow of lubrication Q of the electrically driven component 2 is obtainedhTo achieve the pump flow QpIs a predetermined ratio k2I.e. by
Qh＝k2Qp Qp＞Qo
Wherein k is2The proportion of the small lubricating shunt of the electric drive component 2 is generally 0.03-0.1.
The flow rate Q of the split ratio switching pump of the split valve 5oAbout 6L/min. When the flow rate of the pump body 13 is less than QoWhen this happens, the diverter valve 5 will pump about 22% of the totalThe output flow of lubricant from body 13 is distributed to the mixing element. When the output flow of the lubricating oil of the pump body 13 is more than QoIn the meantime, the splitter valve 5 only splits about 3% of the output flow of the lubricating oil to the electric drive part 2, so that the dual clutch 4 obtains about 97% of the output flow of the lubricating oil, thereby ensuring cooling and lubrication thereof.
In summary, the splitter valve can automatically select the flow rate Q of the lubricating oil supplied to the electrically driven part 2 according to the flow rate or pressure of the pump body 13h. The maximum flow supply requirements of the double clutch and the mixing component are met under the condition that the flow of the pump body 13 is not increased. The power loss caused by increasing the flow of the pump body 13 is avoided, and unnecessary electric control elements are saved.
In fig. 2, reference numerals 21 and 22 may also be hydraulic orifices for regulating the distribution of the flow of lubricating oil between the plurality of bearings and the plurality of gears.
Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications which are consistent with the principles of this invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (17)
1. A splitter valve for a vehicle, the vehicle being an electrically driven hybrid vehicle having a dual clutch transmission, the splitter valve for regulating the flow of lubricating oil to between the dual clutches and respective electrically driven components of the transmission, the splitter valve being mounted at a lubricating oil gallery leading to the electrically driven components,
the flow divider valve includes:
the valve body is internally provided with a through part, one end of the through part is an inlet, and the other end of the through part is an outlet;
a plurality of passages respectively communicating with the inlet and the outlet for circulating lubricating oil to a lubricating oil passage of the electric drive component;
a moving member mounted within the through-portion, moving to close or open a portion of the plurality of channels, the movement of the moving member being responsive to the pressure of the lubricating oil to the electrically driven component; the elastic piece is arranged at the moving piece and can push the moving piece to move and reset, and the pressure of the lubricating oil can be greater than the elastic force of the elastic piece; and
the sleeve piece is used for limiting the moving piece to reciprocate in the sleeve piece along the axial direction of the sleeve piece, the sleeve piece is installed in the through part, a cavity is formed in the inner wall of the through part at the inlet and the outer wall of one end of the sleeve piece, lubricating oil can enter one end of the sleeve piece so that the lubricating oil can push the moving piece to move along the axial direction of the sleeve piece, and the inner part of the other end of the sleeve piece is communicated with the outlet of the through part;
when the lubricating oil pressure is greater than the elastic force of the elastic part, the moving part is pushed by the lubricating oil to enable one part of the channels to be closed, and the other part of the channels keeps a passage; or,
when the lubricating oil pressure is less than the elastic force of the elastic member, the moving member is pushed by the elastic member to restore a part of the plurality of channels and maintain the passage.
2. The flow divider valve of claim 1,
the plurality of channels are a plurality of first through holes arranged on the side wall of the sleeve part, the plurality of channels are arranged in at least two groups, the at least two groups are sequentially arranged along the moving direction of the moving part, the plurality of channels can communicate the inside of the other end of the sleeve part with the through part at the cavity,
the moving member is a cylindrical member which is fitted with the sleeve member.
3. The diverter valve according to claim 1 wherein each of said plurality of passages is disposed around a circumference of said sleeve member.
4. The diverter valve according to claim 1 wherein said plurality of passages are arranged in two groups, one of said two groups being a first through hole and being disposed adjacent said other end of said sleeve member, the other of said two groups being two first through holes formed around the circumference of said sleeve member and being disposed distal said other end of said sleeve member.
5. The diverter valve according to any one of claims 1-4, further having
The inlet baffle is used for limiting the moving element to move in the sleeve element and is arranged at one end of the sleeve element, and the inlet baffle is provided with a second through hole for enabling the lubricating oil to enter the sleeve element from the outside of one end of the sleeve element; and
the outlet baffle is used for limiting the moving element to move in the sleeve element and is arranged at the other end of the sleeve element, and the outlet baffle is provided with a third through hole used for communicating the other end of the sleeve element with the outlet of the flow divider;
the end part of the moving part close to the other end of the sleeve part is arranged at a distance from the inner wall of the sleeve part, so that the other part of the channels still keeps a passage when the moving part is jointed with the other end of the sleeve part.
6. The shunt valve of claim 5, wherein said resilient member is a spring member connected to said displacement member and to the other end of said sleeve member.
7. The diverter valve according to claim 5 wherein said moving member is a stepped shaft, the diameter of said moving member increases in sequence from the other end of said sleeve member toward one end of said sleeve member, and said moving member is a cylindrical body having three segments.
8. The diverter valve according to claim 5 wherein said sleeve member end is disposed toward said inlet port to facilitate the rapid ingress of said lubricating oil into said sleeve member end.
9. The flow divider valve according to any one of claims 1-4 and 6-8, wherein said through portion at said inlet is a stepped bore having three sections of different diameters, the diameters of which decrease from said inlet to said outlet, said sleeve member engaging with intermediate sections of said three sections of stepped bores of different diameters;
the inlet baffle is riveted and fixed with the valve body at the inlet.
10. The flow divider valve according to any of claims 1-4, 6-8, wherein said electrically driven component comprises a drive motor, a plurality of gears for transmitting power of said drive motor, and a plurality of bearings for reducing friction during transmission of power of said drive motor by said plurality of gears.
11. A lubricated hydraulic system having the diverter valve of any one of claims 1 to 10, the lubricated hydraulic system having
An oil sump for providing lubricating oil to the system;
the pump body is used for driving the lubricating oil to enter the double clutch and the electric drive component and regulating the flow of the lubricating oil entering the system, the inlet of the pump body is communicated with the oil pool, and the outlet of the pump body is respectively communicated with the double clutch and the electric drive component; and
the flow dividing valve is used for adjusting the flow of the lubricating oil flowing between the double clutch and the electric drive component, and is arranged at a communication part of the pump body for driving the lubricating oil to enter the electric drive component.
12. The lubricated hydraulic system of claim 11, wherein the pump body is an electric hydraulic pump, an oil suction filter is installed at a communication part between the oil pool and the pump body, and a cooler and an oil pressing filter are sequentially installed at a communication part from the pump body to the double clutch.
13. The lubricated hydraulic system according to claim 11 or 12, wherein the diverter valve is of a tube head structure and is mounted at the outlet of the pump body or outside the gearbox housing.
14. The lubricated hydraulic system according to claim 13, wherein the flow divider is an L-shaped pipe head structure, and the through part is an L-shaped pipe.
15. The lubricated hydraulic system of claim 14, wherein the diverter valve is threadably mounted at the outlet of the pump body or outside the housing of the gearbox.
16. The lubricated hydraulic system according to any one of claims 11, 12, 14 or 15, wherein the act of the pump body increasing the flow of lubricating oil into the system is in response to the gearbox shifting event or the vehicle engine driving event and the temperature of the lubricating oil in the dual clutch and in the electrically driven components being above a set value.
17. The lubricated hydraulic system according to any one of claims 11, 12, 14, or 15, wherein the gearbox is a seven-speed electrically driven hybrid gearbox with a dual clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710170013.7A CN106969251B (en) | 2017-03-21 | 2017-03-21 | A kind of flow divider and its hydraulic system of lubrication for vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710170013.7A CN106969251B (en) | 2017-03-21 | 2017-03-21 | A kind of flow divider and its hydraulic system of lubrication for vehicle |
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| Publication Number | Publication Date |
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| CN106969251A CN106969251A (en) | 2017-07-21 |
| CN106969251B true CN106969251B (en) | 2019-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710170013.7A Active CN106969251B (en) | 2017-03-21 | 2017-03-21 | A kind of flow divider and its hydraulic system of lubrication for vehicle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10774883B2 (en) * | 2018-06-06 | 2020-09-15 | Borgwarner Inc. | Passive wet clutch lube valve with a bailing system and transmission including the same |
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| DE2921796A1 (en) * | 1978-05-30 | 1979-12-06 | Sundstrand Corp | DELAY VALVE FOR A HYDRAULIC CIRCUIT |
| US4621544A (en) * | 1984-06-28 | 1986-11-11 | Tran-Saver, Inc. | Adjustable fully automatic vacuum modulator control for automatic transmission having a vacuum modulator |
| EP0295466A2 (en) * | 1987-06-13 | 1988-12-21 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Valve for controlling the oil temperature of a drive mechanism |
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| Publication number | Publication date |
|---|---|
| CN106969251A (en) | 2017-07-21 |
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