CN109099155B - DCT transmission double-pump system, control method and automobile - Google Patents
DCT transmission double-pump system, control method and automobile Download PDFInfo
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- CN109099155B CN109099155B CN201811168229.0A CN201811168229A CN109099155B CN 109099155 B CN109099155 B CN 109099155B CN 201811168229 A CN201811168229 A CN 201811168229A CN 109099155 B CN109099155 B CN 109099155B
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4165—Control of cooling or lubricating
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
- F16H61/4096—Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
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- Mechanical Engineering (AREA)
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to a double-pump system of a DCT (dual clutch transmission), a control method and an automobile, aiming at solving the problem of high energy consumption loss caused by one mechanical oil pump in the prior art. The DCT transmission dual pump system includes: a controller; a drive motor connected to the controller; the high-pressure oil pump is driven by the driving motor in a forward rotation mode, and the low-pressure oil pump is driven by the driving motor in a reverse rotation mode; the high-pressure control oil circuit and the energy accumulator are supplied by the high-pressure oil pump, and the energy accumulator is connected with the controller; a low-pressure lubricating oil path supplied by a low-pressure oil pump; the controller is used for controlling the driving motor to rotate forwards when the current operation working condition of the DCT is determined to be a gear switching working condition, so that the high-pressure oil pump supplies oil to the high-pressure control oil way and the energy accumulator; and the driving motor is controlled to rotate reversely when the current running working condition of the DCT is determined to be a driving working condition with a gear, so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil way, and the energy accumulator is controlled to supply oil to the high-pressure control oil way.
Description
Technical Field
The invention relates to the technical field of transmission control, in particular to a dual-pump system of a DCT (dual clutch transmission), a control method and an automobile.
Background
In the development process of automobiles, the demands of users are always the strongest power for the continuous improvement of automobile technology. With the development of the current society, the requirements of users on the dynamic property, the fuel economy, the safety and the comfort of automobiles are further improved, so that higher requirements are put on the performances of various parts and assemblies of automobiles including transmissions. The DCT hydraulic system of the transmission is taken as one of main energy consumption sources of the transmission, and the energy consumption situation of the DCT hydraulic system is always the focus of the design and development of the transmission. However, the problem is that the DCT transmission generally provides oil for the hydraulic system through a mechanical oil pump, and in order to make the mechanical oil pump meet the use requirement of the transmission at a low rotation speed, a large displacement oil pump is usually required to be designed. When the rotating speed is high, the flow of the oil pump is larger than the use requirement of the system, and more oil enters the oil tank through the oil return system, so that the energy consumption loss of the transmission is increased. In addition, the hydraulic system requirements of the transmission can be divided into high-pressure low-flow requirements of a gear shifting and unidirectional rotating clutch and low-pressure high-flow requirements of cooling and lubricating, and a mechanical oil pump inevitably generates high-pressure and high-flow working conditions in order to meet the requirements of the two systems, so that the energy consumption is further increased.
Disclosure of Invention
The invention aims to provide a DCT (dual clutch transmission) transmission double-pump system, a control method and an automobile, and aims to solve the problem of high energy consumption loss caused by one mechanical oil pump in the prior art.
The technical scheme of the invention is as follows:
the invention provides a dual pump system of a DCT transmission, comprising: a controller;
the driving motor is connected with the controller;
the high-pressure oil pump is driven by the driving motor in a forward rotation mode, and the low-pressure oil pump is driven by the driving motor in a reverse rotation mode;
the high-pressure oil pump is used for supplying power to the high-pressure control oil path and the energy accumulator, the energy accumulator is communicated with the high-pressure control oil path, and the energy accumulator is connected with the controller;
a low-pressure lubrication oil path supplied by the low-pressure oil pump;
the controller is used for controlling the driving motor to rotate forwards when the current operation working condition of the DCT is determined to be a gear switching working condition according to the power parameters of the vehicle, so that the high-pressure oil pump supplies oil to the high-pressure control oil way and the energy accumulator; and the driving motor is controlled to rotate reversely when the current operation working condition of the DCT is determined to be a driving working condition with a gear according to the power parameters of the vehicle, so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil way, and the energy accumulator is controlled to supply oil to the high-pressure control oil way.
Preferably, the oil pump displacement of the high-pressure oil pump is smaller than the oil pump displacement of the low-pressure oil pump;
the controller is specifically used for controlling the driving motor to rotate positively at a first rotating speed when the current operation working condition of the DCT is determined to be a gear switching working condition according to the power parameters of the vehicle; and controlling the driving motor to reversely rotate at a second rotating speed which is greater than the first rotating speed when the current operating condition of the DCT is determined to be a gear-in running condition according to the power parameters of the vehicle.
Preferably, the driving motor is a bidirectional rotating motor, a first one-way clutch is arranged between the driving shaft of the high-pressure oil pump and the output shaft at one side of the driving motor, and a second one-way clutch is arranged between the driving shaft of the low-pressure oil pump and the output shaft at the other side of the driving motor;
when the controller controls the driving motor to rotate forwards, the first one-way clutch rotates in a one-way mode to drive the high-pressure oil pump, and the high-pressure oil pump supplies oil to the high-pressure control oil way and the energy accumulator; the second one-way clutch is locked in a one-way mode, so that the low-pressure oil pump stops supplying oil to the low-pressure lubricating oil way;
when the controller controls the driving motor to rotate reversely, the first one-way clutch is locked in a one-way mode, so that the high-pressure oil pump stops supplying oil to the high-pressure control oil way and the energy accumulator; and the second one-way clutch rotates in a one-way mode to drive the low-pressure oil pump, so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil way.
Preferably, the outlet end of the high-pressure oil pump is provided with a first check valve, and the outlet end of the low-pressure oil pump is provided with a second check valve.
Preferably, the low-pressure oil pump and the high-pressure oil pump are supplied with oil through an oil pan respectively; or the low-pressure oil pump and the high-pressure oil pump are supplied with oil through the same oil pan.
Preferably, the high-pressure oil pump and the low-pressure oil pump are electronic oil pumps, the oil pressure range of the high-pressure oil pump is 40-60bar, and the oil pressure range of the low-pressure oil pump is 0-5 bar.
According to another aspect of the invention, the invention also provides an automobile comprising the DCT transmission dual-pump system.
According to another aspect of the present invention, the present invention further provides a control method of a DCT transmission dual-pump system, applied to the DCT transmission dual-pump control system described above, the method including:
acquiring power parameters of a vehicle;
determining the current operation condition of the DCT according to the power parameter of the vehicle;
if the current operation working condition is that the DCT is in a gear switching working condition, controlling the driving motor to rotate forward to enable the high-pressure oil pump to supply oil to the high-pressure control oil way and the energy accumulator;
and if the current operation working condition is that the DCT is in a driving working condition with a gear, controlling the driving motor to rotate reversely, so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil way, and controlling the energy accumulator to supply oil to the high-pressure control oil way.
Preferably, the step of controlling the driving motor to rotate forward to supply oil to the high-pressure control oil path and the accumulator by the high-pressure oil pump includes:
controlling the driving motor to rotate forwards at a first rotating speed, so that the high-pressure oil pump supplies oil to the high-pressure control oil way and the energy accumulator;
the step of controlling the driving motor to rotate reversely to enable the low-pressure oil pump to supply oil to the low-pressure lubricating oil way comprises the following steps:
controlling the driving motor to rotate reversely at a second rotating speed, so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil way; the first rotational speed is less than the second rotational speed.
Preferably, the power parameters of the vehicle include: the current vehicle speed and accelerator pedal opening of the vehicle.
The invention has the beneficial effects that:
two oil pumps with different discharge capacities are designed to respectively supply oil to the high-pressure control circuit and the low-pressure lubricating oil circuit, so that the oil pumps can be controlled to pump oil according to the requirements of the high-pressure control oil circuit and the low-pressure lubricating oil circuit; meanwhile, the high-pressure oil pump and the low-pressure oil pump are driven by a driving motor in forward rotation or reverse rotation, so that the maximum oil consumption of the whole system is reduced to the sum of the product of the maximum pressure requirement and the minimum flow of the high-pressure control oil way and the product of the minimum pressure requirement and the maximum flow of the low-pressure lubricating oil way, the fuel economy performance of the transmission can be greatly improved, and the oil consumption of the system is reduced.
Drawings
FIG. 1 is a block diagram of a DCT transmission dual pump system of the present invention;
FIG. 2 is a flow chart of a control method of the DCT transmission dual pump system of the present invention;
description of reference numerals: 1. a drive motor; 2. a high-pressure oil pump; 3. a low pressure oil pump; 4. a high-pressure control oil path; 5. an accumulator; 6. a low pressure lubrication circuit; 7. a first one-way clutch; 8. a second one-way clutch; 9. a first check valve; 10. a second one-way valve; 11. a first oil pan; 12. a second oil pan; 13. a first filter; 14. a second filter.
Detailed Description
Referring to fig. 1, the present invention provides a DCT transmission dual pump system comprising: a controller; a drive motor 1 connected to the controller; a high-pressure oil pump 2 driven by the driving motor 1 in a forward rotation manner and a low-pressure oil pump 3 driven by the driving motor 1 in a reverse rotation manner; the high-pressure oil pump 2 is used for supplying power to the high-pressure control oil path 4 and the energy accumulator 5, the energy accumulator 5 is communicated with the high-pressure control oil path 4, and the energy accumulator 5 is connected with the controller; a low-pressure lubrication oil passage 6 supplied by the low-pressure oil pump 3; the controller is used for controlling the driving motor 1 to rotate forwards when the current operation working condition of the DCT is determined to be a gear switching working condition according to the power parameters of the vehicle, so that the high-pressure oil pump 2 supplies oil to the high-pressure control oil way 4 and the energy accumulator 5; and the driving motor 1 is controlled to rotate reversely when the current operation working condition of the DCT is determined to be a driving working condition with a gear according to the power parameters of the vehicle, so that the low-pressure oil pump 3 supplies oil to the low-pressure lubricating oil way 6, and the energy accumulator 5 is controlled to supply oil to the high-pressure control oil way 4.
The power parameters of the vehicle comprise the current vehicle speed and the opening degree of an accelerator pedal of the vehicle, the controller can be a transmission control unit TCU, a corresponding relation table among the current vehicle speed, the opening degree of the accelerator pedal and the current operation condition of the transmission is stored in the controller in a pre-selection mode, and the current operation condition can be determined by searching information corresponding to the current vehicle speed and the opening degree of the accelerator pedal in the corresponding relation table. The accumulator 5 is an energy storage device in the hydropneumatic system, and is used for storing the high-pressure oil pumped by the high-pressure oil pump 2. Because the energy accumulator 5 and the high-pressure control oil way 4 are arranged in parallel, one path of high-pressure oil pumped by the high-pressure oil pump 2 enters the energy accumulator 5 for storage, and the other path of high-pressure oil flows into the high-pressure control oil way 4 for providing the oil quantity required by gear switching of the DCT, therefore, when the driving motor 1 positively rotates to drive the low-pressure oil pump 3 so that the high-pressure oil pump 2 cannot be driven, the high-pressure hydraulic oil stored by the energy accumulator 5 is supplied to meet the normal working requirement of the system.
In the application, the low-pressure oil pump 3 and the high-pressure oil pump 2 are both electronic pumps, the oil pressure range of the low-pressure oil pump 3 is 0-5bar, and the oil pressure range of the high-pressure oil pump 2 is 40-60 bar. In order to reduce the oil consumption of the system, the oil pump displacement of the high-pressure oil pump 2 is smaller than that of the low-pressure oil pump 3; the controller is specifically used for controlling the driving motor 1 to rotate positively at a first rotating speed when the current operation condition of the DCT is determined to be a gear switching condition according to the power parameters of the vehicle; and when the current operation condition of the DCT is determined to be a belt gear running condition according to the power parameters of the vehicle, controlling the driving motor 1 to reversely rotate at a second rotating speed which is greater than the first rotating speed. The driving motor 1 drives the low-pressure oil pump 3 at a higher forward rotation speed, and can provide large-flow hydraulic oil required by the low-pressure lubricating oil circuit 6; the drive motor 1 drives the high-pressure oil pump 2 at a low reverse rotation speed, and can supply a small flow of hydraulic oil required by the high-pressure control oil passage 4.
Further, in order to realize that the driving motor 1 can not drive the high-pressure oil pump 2 and the low-pressure oil pump 3 at the same time, in the embodiment of the present invention, referring to fig. 1, the driving motor 1 is a bidirectional rotating motor, a first one-way clutch 7 is arranged between the driving shaft of the high-pressure oil pump 2 and one-side output shaft of the driving motor 1, and a second one-way clutch 8 is arranged between the driving shaft of the low-pressure oil pump 3 and the other-side output shaft of the driving motor 1; when the controller controls the driving motor 1 to rotate forwards, the first one-way clutch 7 rotates in a one-way mode to drive the high-pressure oil pump 2, so that the high-pressure oil pump 2 supplies oil to the high-pressure control oil way 4 and the energy accumulator 5; the second one-way clutch 8 is locked in one way, so that the low-pressure oil pump 3 stops supplying oil to the low-pressure lubricating oil way 6; when the controller controls the driving motor 1 to rotate reversely, the first one-way clutch 7 is locked in one way, so that the high-pressure oil pump 2 stops supplying oil to the high-pressure control oil path 4 and the energy accumulator 5; the second one-way clutch 8 rotates in one direction to drive the low-pressure oil pump 3, so that the low-pressure oil pump 3 supplies oil to the low-pressure lubricating oil way 6.
Wherein, the first one-way clutch 7 and the second one-way clutch 8 are composed of an outer race, an inner race, sprags, and the like. The principle of one-way locking or one-way rotation realized by the two is that when the inner race is fixed and the outer race rotates clockwise, the wedge block is not locked, and the outer race can rotate freely; when the outer race rotates counterclockwise, the sprags lock and the outer race cannot rotate. A driving shaft of the high-pressure oil pump 2 is connected with an outer race of the first one-way clutch 7, and an output shaft at one side of the driving motor 1 is connected with the inner race of the first one-way clutch 7; the drive shaft of the low-pressure oil pump 3 is connected to the outer race of the second one-way clutch 8, and the other-side output shaft of the drive motor 1 is connected to the outer race of the second one-way clutch 7. Since the driving motor 1 is a bidirectional rotating motor, a command is sent to the driving motor through the controller, so that the bidirectional rotating motor rotates forwards or backwards, and then the first one-way clutch 7 or the second one-way clutch 8 works.
In order to prevent the hydraulic oil from flowing back, as shown in fig. 1, a first check valve 9 is disposed at the outlet end of the high-pressure oil pump 2, and a second check valve 10 is disposed at the outlet end of the low-pressure oil pump 3. Wherein the first check valve 9 and the second check valve 10 are arranged to ensure that high-pressure oil in the high-pressure control oil passage 4 and the accumulator 5 does not flow back to the high-pressure oil pump 2 and that low-pressure oil in the low-pressure lubrication oil passage 6 does not flow back to the low-pressure oil pump 3.
Further, as shown in fig. 1, the low-pressure oil pump 3 and the high-pressure oil pump 2 are respectively supplied with oil through an oil pan, wherein the low-pressure oil pump 3 is connected into the second oil pan 12 through the second filter 14, and the high-pressure oil pump 2 is connected into the first oil pan 11 through the first filter 13; alternatively, in the present application, the low-pressure oil pump and the high-pressure oil pump may also be supplied with oil through the same oil pan.
For the transmission, the low-pressure lubrication oil path 6 requires hydraulic oil with small oil pressure and large flow, the high-pressure control oil path 4 requires hydraulic oil with large oil pressure and small flow, and for a single mechanical oil pump which needs to pump oil for both the high-pressure control oil path 4 and the low-pressure lubrication oil path 6 in the prior art, the maximum power consumption of the single mechanical oil pump is in direct proportion to the product of the maximum pressure requirement of the high-pressure control oil path 4 and the maximum flow requirement of the low-pressure lubrication oil path 6 in the hydraulic system. And in this application, low-pressure oil pump 3 is the design of big discharge capacity, and high-pressure oil pump 2 is the design of little discharge capacity, and low-pressure oil pump 3's discharge capacity is greater than high-pressure oil pump 2's discharge capacity, like this, can avoid the big consumption operating mode point of the maximum pressure of oil pump and maximum flow product. When the system needs high flow, the low-pressure oil pump 3 can pump out high-flow hydraulic oil required by the low-pressure lubricating oil circuit 6 by improving the forward rotation speed of the driving motor 1; when the system requires low flow, the high-pressure oil pump 2 can pump out the small-flow hydraulic oil required by the high-pressure control oil circuit 4 by reducing the reverse rotation speed of the driving motor 1. For the system provided by the invention, the maximum energy consumption of the system is reduced to the sum of the product of the maximum pressure requirement and the minimum flow of the high-pressure control oil circuit 4 and the product of the minimum pressure requirement and the maximum flow of the low-pressure lubricating oil circuit 6. Therefore, two oil pumps with different displacement are reasonably designed to respectively supply oil to the high-pressure control oil path 4 and the low-pressure lubricating oil path 6, and energy loss caused by one mechanical oil pump can be reduced. In addition, since the driving motor 1 only needs to drive one oil pump in one rotation direction, the oil consumption can be further reduced. In conclusion, the invention can greatly improve the fuel economy performance of the transmission and reduce the oil consumption of the system.
According to another aspect of the invention, the invention also provides an automobile comprising the DCT transmission dual-pump system.
Referring to fig. 2, according to another aspect of the present invention, the present invention further provides a control method of a DCT transmission dual pump system, applied to the DCT transmission dual pump control system described above, the method including:
And 2, determining the current operation condition of the DCT according to the power parameter of the vehicle.
The power parameters of the vehicle comprise the current vehicle speed and the opening degree of an accelerator pedal of the vehicle, the controller can be a transmission control unit TCU, a corresponding relation table among the current vehicle speed, the opening degree of the accelerator pedal and the current operation condition of the transmission is stored in the controller in a pre-selection mode, and the current operation condition can be determined by searching information corresponding to the current vehicle speed and the opening degree of the accelerator pedal in the corresponding relation table.
And 3, if the current operation working condition is that the DCT is in a gear switching working condition, controlling the driving motor 1 to rotate forwards, and enabling the high-pressure oil pump 2 to supply oil to the high-pressure control oil way 4 and the energy accumulator 5. In the process of driving the motor 1 to rotate forwards, the first one-way clutch 7 conducts connection between the high-pressure oil pump 2 and the high-pressure control oil way 4 and the energy accumulator 5, so that the high-pressure oil pump 2 supplies oil to the high-pressure oil pump and the energy accumulator; in this process, the second one-way clutch 8 disconnects the low-pressure oil pump 3 from the low-pressure lubrication oil passage 6, and at this time, the low-pressure oil pump 3 no longer supplies oil to the low-pressure lubrication oil passage 6. Since the DCT transmission has a short time (as short as several seconds) in the shift state, the low-pressure lubrication oil passage 6 can be kept in a lubrication state without supplying oil to the low-pressure lubrication oil passage 6 during the short time.
Specifically, step 3 includes:
and controlling the driving motor 1 to rotate forwards at a first rotating speed, so that the high-pressure oil pump 2 supplies oil to the high-pressure control oil way 4 and the energy accumulator 5.
And 4, if the current operation working condition is that the DCT is in a running working condition with a gear, controlling the driving motor 1 to reversely rotate, so that the low-pressure oil pump 3 supplies oil to the low-pressure lubricating oil way 6, and controlling the energy accumulator 5 to supply oil to the high-pressure control oil way 4.
Specifically, step 4 includes:
controlling the driving motor 1 to rotate reversely at a second rotating speed, so that the low-pressure oil pump 3 supplies oil to the low-pressure lubricating oil path 6; the first rotational speed is less than the second rotational speed. When the driving motor 1 rotates reversely at the second rotation speed, the driving motor 1 cannot pump oil at the driving high-pressure oil pump 2, and in the process, high-pressure oil meeting the flow demand and the pressure demand of the high-pressure oil is supplied to the high-pressure control oil passage 6 of the driving motor 1 through the high-pressure oil stored in the accumulator 5.
According to the control method of the DCT transmission double-pump system, the controller controls the two oil pumps with different displacement volumes to respectively supply oil to the high-pressure control circuit 4 and the low-pressure lubricating oil circuit 6, and the oil pumps can be controlled to pump oil according to the requirements of the high-pressure control oil circuit 4 and the low-pressure lubricating oil circuit 6; meanwhile, the controller controls one driving motor 1 to rotate forwards or reversely to drive the high-pressure oil pump 2 and the low-pressure oil pump 3, so that the maximum oil consumption of the whole system is reduced to the sum of the product of the maximum pressure requirement and the minimum flow of the high-pressure control oil way 4 and the product of the minimum pressure requirement and the maximum flow of the low-pressure lubricating oil way 6, the fuel economy performance of the transmission can be greatly improved, and the oil consumption of the system is reduced.
Claims (9)
1. A DCT transmission dual pump system, comprising: a controller;
a drive motor (1) connected to the controller;
a high-pressure oil pump (2) driven by the driving motor (1) in a forward rotation manner and a low-pressure oil pump (3) driven by the driving motor (1) in a reverse rotation manner;
the high-pressure oil pump is characterized by comprising a high-pressure control oil way (4) and an energy accumulator (5), wherein the high-pressure control oil way (4) is supplied by the high-pressure oil pump (2), the energy accumulator (5) is communicated with the high-pressure control oil way (4), and the energy accumulator (5) is connected with the controller;
a low-pressure lubrication oil path (6) supplied by the low-pressure oil pump (3);
the controller is used for controlling the driving motor (1) to rotate forwards when the current operation working condition of the DCT is determined to be a gear switching working condition according to the power parameters of the vehicle, so that the high-pressure oil pump (2) supplies oil to the high-pressure control oil way (4) and the energy accumulator (5); the driving motor (1) is controlled to rotate reversely when the current operation working condition of the DCT is determined to be a driving working condition with a gear according to the power parameters of the vehicle, so that the low-pressure oil pump (3) supplies oil to the low-pressure lubricating oil way (6), and the energy accumulator (5) is controlled to supply oil to the high-pressure control oil way (4); the oil pump displacement of the high-pressure oil pump (2) is smaller than that of the low-pressure oil pump (3);
the controller is specifically used for controlling the driving motor (1) to rotate positively at a first rotating speed when the current operation condition of the DCT is determined to be a gear switching condition according to the power parameters of the vehicle; and controlling the driving motor (1) to reversely rotate at a second rotating speed which is greater than the first rotating speed when the current operating condition of the DCT is determined to be a gear-in running condition according to the power parameters of the vehicle.
2. The DCT transmission twin-pump system according to claim 1, characterized in that the drive motor (1) is a bidirectional rotary motor, a first one-way clutch (7) is provided between the drive shaft of the high-pressure oil pump (2) and one-side output shaft of the drive motor (1), and a second one-way clutch (8) is provided between the drive shaft of the low-pressure oil pump (3) and the other-side output shaft of the drive motor (1);
when the controller controls the driving motor (1) to rotate forwards, the first one-way clutch (7) rotates in a one-way mode to drive the high-pressure oil pump (2), so that the high-pressure oil pump (2) supplies oil to the high-pressure control oil way (4) and the energy accumulator (5); the second one-way clutch (8) is locked in one way, so that the low-pressure oil pump (3) stops supplying oil to the low-pressure lubricating oil way (6);
when the controller controls the driving motor (1) to rotate reversely, the first one-way clutch (7) is locked in one way, so that the high-pressure oil pump (2) stops supplying oil to the high-pressure control oil way (4) and the energy accumulator (5); and the second one-way clutch (8) rotates in one direction to drive the low-pressure oil pump (3) so that the low-pressure oil pump (3) supplies oil to the low-pressure lubricating oil way (6).
3. The DCT transmission twin-pump system as recited in claim 1, characterized in that the outlet end of the high-pressure oil pump (2) is provided with a first check valve (9) and the outlet end of the low-pressure oil pump (3) is provided with a second check valve (10).
4. The DCT transmission twin pump system as recited in claim 1, characterized in that the low pressure oil pump (3) and the high pressure oil pump (2) are each supplied with oil through an oil pan; or the low-pressure oil pump and the high-pressure oil pump are supplied with oil through the same oil pan.
5. The DCT transmission twin-pump system according to claim 1, characterized in that the high-pressure oil pump (2) and the low-pressure oil pump (3) are electronic oil pumps, the oil pressure range of the high-pressure oil pump (2) is 40-60bar, and the oil pressure range of the low-pressure oil pump (3) is 0-5 bar.
6. An automobile comprising a DCT transmission dual pump system as claimed in any of claims 1 to 5.
7. A control method of a DCT transmission dual pump system applied to the DCT transmission dual pump system according to any one of claims 1 to 5, characterized by comprising:
acquiring power parameters of a vehicle;
determining the current operation condition of the DCT according to the power parameter of the vehicle;
if the current operation working condition is that the DCT is in a gear switching working condition, controlling the driving motor (1) to rotate forwards, and enabling the high-pressure oil pump (2) to supply oil to the high-pressure control oil way (4) and the energy accumulator (5);
and if the current operation working condition is that the DCT is in a driving working condition with a gear, controlling the driving motor (1) to rotate reversely, so that the low-pressure oil pump (3) supplies oil to the low-pressure lubricating oil way (6), and controlling the energy accumulator (5) to supply oil to the high-pressure control oil way (4).
8. The control method according to claim 7, wherein the step of controlling the drive motor (1) to rotate forward so that the high-pressure oil pump (2) supplies oil to the high-pressure control oil passage (4) and the accumulator (5) includes:
controlling the driving motor (1) to rotate forwards at a first rotating speed, so that the high-pressure oil pump (2) supplies oil to the high-pressure control oil way (4) and the energy accumulator (5);
the step of controlling the driving motor (1) to rotate reversely to enable the low-pressure oil pump (3) to supply oil to the low-pressure lubricating oil way (6) comprises the following steps:
controlling the driving motor (1) to rotate reversely at a second rotating speed, so that the low-pressure oil pump (3) supplies oil to the low-pressure lubricating oil way (6); the first rotational speed is less than the second rotational speed.
9. The method of claim 7, wherein the power parameters of the vehicle comprise: the current vehicle speed and accelerator pedal opening of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168229.0A CN109099155B (en) | 2018-10-08 | 2018-10-08 | DCT transmission double-pump system, control method and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168229.0A CN109099155B (en) | 2018-10-08 | 2018-10-08 | DCT transmission double-pump system, control method and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109099155A CN109099155A (en) | 2018-12-28 |
| CN109099155B true CN109099155B (en) | 2021-04-06 |
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| CN109340074B (en) * | 2018-10-18 | 2023-07-07 | 中国海洋石油集团有限公司 | Hydraulic control system |
| CN111981115A (en) * | 2019-05-23 | 2020-11-24 | 广州汽车集团股份有限公司 | Hydraulic system and automatic transmission and automobile with same |
| CN114060500B (en) * | 2021-12-03 | 2024-06-28 | 安徽江淮汽车集团股份有限公司 | Automatic lubricating oil regulating and controlling system and method for DCT (discrete cosine transform) speed changer |
| CN115574078A (en) * | 2022-12-08 | 2023-01-06 | 盛瑞传动股份有限公司 | Oil path control device, oil path system and vehicle |
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| JP4825363B2 (en) * | 2001-05-15 | 2011-11-30 | カヤバ工業株式会社 | Fluid pressure transmission device |
| CN102953787B (en) * | 2012-11-28 | 2015-04-01 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| KR20150071486A (en) * | 2013-12-18 | 2015-06-26 | 현대자동차주식회사 | Electric oil pump control system for automatic transmission and method thereof |
| DE102014209856A1 (en) * | 2014-05-23 | 2015-11-26 | Volkswagen Aktiengesellschaft | Hydraulic supply device |
| CN206608537U (en) * | 2017-03-07 | 2017-11-03 | 浙江众孚动力研发有限公司 | Double pump system for double clutch gearboxes |
| CN107387598B (en) * | 2017-08-24 | 2023-06-20 | 中国第一汽车股份有限公司 | Efficient oil source system of automatic transmission |
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