CN111516478A - Transmission system of vehicle and vehicle - Google Patents
Transmission system of vehicle and vehicle Download PDFInfo
- Publication number
- CN111516478A CN111516478A CN202010208218.1A CN202010208218A CN111516478A CN 111516478 A CN111516478 A CN 111516478A CN 202010208218 A CN202010208218 A CN 202010208218A CN 111516478 A CN111516478 A CN 111516478A
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- Prior art keywords
- transmission assembly
- driving device
- vehicle
- transmission
- engine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
- B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention belongs to the technical field of motor vehicles, and particularly relates to a transmission system of a vehicle and the vehicle. The transmission system of the vehicle comprises an engine, a variable pump and a controller, wherein the variable pump is connected with a first transmission assembly through a second transmission assembly and is respectively connected with two driving devices; the controller is respectively connected with the variable pump, the first driving device and the second driving device; the first transmission assembly is connected with the fifth transmission assembly, the first driving device is connected with the fifth transmission assembly through the sixth transmission assembly, and the second driving device is connected with the fourth transmission assembly through the third transmission assembly. According to the scheme, the variable pump, the first driving device, the second driving device and the engine are used in a mixed mode, the first driving device is controlled to adjust output torque and the second driving device is controlled to adjust rotating speed through transmission of the transmission assemblies, coupling of the rotating speed and the torque is achieved, stepless speed change is achieved, and the engine can work in a highest-efficiency area under different rotating speeds.
Description
Technical Field
The invention belongs to the technical field of motor vehicles, and particularly relates to a transmission system of a vehicle and the vehicle.
Background
At present, the engine of the traditional vehicle can not work at the highest efficiency point at each working condition point, the pure electric vehicle is limited by the battery endurance mileage, and the battery motor of the gasoline-electric hybrid vehicle is expensive and has low power density.
In the prior art, no matter the gearbox is a multi-gear gearbox or an AT gearbox or other traditional power systems, although the labor intensity of a driver is reduced, the engine cannot always work in an economic oil consumption area, so that the oil consumption is high, the energy recovery cannot be realized, and the energy waste is generated.
Disclosure of Invention
The invention aims to at least solve the problem that the existing transmission system can not enable an engine to always work in an economic oil consumption area, so that the oil consumption is higher. The purpose is realized by the following technical scheme:
a first aspect of the invention proposes a transmission system of a vehicle, wherein the transmission system comprises:
the engine is connected with the first transmission assembly;
the variable pump is connected with the first transmission assembly through a second transmission assembly, and is respectively connected with the first driving device and the second driving device and used for providing power for the first driving device and the second driving device;
the controller is respectively connected with the variable pump, the first driving device and the second driving device;
the first transmission assembly is connected with the fifth transmission assembly, the first driving device is connected with the fifth transmission assembly through the sixth transmission assembly, the second driving device is connected with the fourth transmission assembly through the third transmission assembly, the fourth transmission assembly is connected with the fifth transmission assembly, and the fifth transmission assembly is connected with a transmission shaft of a vehicle.
According to the transmission system of the vehicle, the variable pump, the first driving device, the second driving device and the engine are used in a mixed mode, the hybrid power transmission system is achieved, transmission of all transmission assemblies is achieved, the first driving device is controlled to adjust output torque, the second driving device is controlled to adjust rotating speed, coupling of the rotating speed and the torque is achieved, stepless speed change is achieved, the engine can work in a highest-efficiency area under different rotating speeds, and the purpose of reducing oil consumption is achieved.
In addition, the transmission system of the vehicle according to the present invention may further have the following additional technical features:
in some embodiments of the invention, a first switch is provided between the variable displacement pump and the second transmission assembly.
In some embodiments of the present invention, a second switching member is disposed between the first transmission assembly and the fifth transmission assembly.
In some embodiments of the present invention, a brake is disposed on the fourth transmission assembly, and the brake is used for braking the fourth transmission assembly and the third transmission assembly.
In some embodiments of the invention, the transmission system further comprises a first accumulator connected to the variable displacement pump, the first drive device and the second drive device via a conduit, respectively.
In some embodiments of the present invention, a control valve is disposed on a pipeline connecting the first accumulator and the first and second driving devices, and the control valve is connected to the controller.
In some embodiments of the invention, the drive system further comprises a second accumulator connected to the first drive device by a conduit.
In some embodiments of the invention, the first and second drive means are both variable or fixed displacement motors.
In some embodiments of the present invention, the first, second, third, fourth and sixth transmission assemblies are all gears or gear sets; and/or
The fifth transmission assembly is a planetary gear set.
In another aspect of the invention, a vehicle is also proposed, wherein the vehicle comprises the transmission system of the vehicle.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings.
In the drawings:
fig. 1 schematically shows a flow chart of a transmission system of a vehicle according to an embodiment of the invention.
1: an engine; 2: a variable displacement pump; 3: a first driving device; 4: a second driving device; 5: a controller; 6: a first transmission assembly; 7: a second transmission assembly; 8: a third transmission assembly; 9: a fourth transmission assembly; 10: a fifth transmission assembly; 11: a sixth transmission assembly; 12: a first clutch; 13-a second clutch; 14: a brake; 15: a first accumulator; 16: a second accumulator; 17: and (4) controlling the valve.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, the transmission system of the vehicle in the present embodiment includes:
the engine 1, the engine 1 is connected with the first transmission assembly 6;
the variable pump 2 is connected with the first transmission assembly 6 through the second transmission assembly 7, and the variable pump 2 is respectively connected with the first driving device 3 and the second driving device 4 and used for providing power for the first driving device 3 and the second driving device 4;
the controller 5 is connected with the variable pump 2, the first driving device 3 and the second driving device 4 respectively;
the first transmission assembly 6 is connected with a fifth transmission assembly 10, the first driving device 3 is connected with the fifth transmission assembly 10 through a sixth transmission assembly 11, the second driving device 4 is connected with a fourth transmission assembly 9 through a third transmission assembly 8, the fourth transmission assembly 9 is connected with the fifth transmission assembly 10, and the fifth transmission assembly 10 is connected with a transmission shaft of a vehicle.
According to the transmission system of the vehicle, the variable pump 2, the first driving device 3, the second driving device 4 and the engine 1 are used in a mixed mode to achieve a hybrid power transmission system, transmission of all transmission components is achieved, the first driving device 3 is controlled to adjust output torque, the second driving device 4 is controlled to adjust rotating speed, coupling of the rotating speed and the torque is achieved, stepless speed change is achieved, the engine 1 can work in a highest-efficiency area under different rotating speeds, and the purpose of reducing oil consumption is achieved.
It should be noted that the first transmission assembly 6, the second transmission assembly 7, the third transmission assembly 8, the fourth transmission assembly 9 and the sixth transmission assembly 11 are all gears or gear sets; and/or the fifth transmission assembly 10 is a planetary gear set, wherein the gear may be a duplicate gear, the transmission ratio of the gear set may be designed according to actual needs, in addition, the planetary gear set adopted by the fifth transmission assembly 10 may be a single planetary row or a double planetary row, and may be a combination of a sun gear, a planet carrier, a gear, a ring gear, and the like, the first driving device 3 and the second driving device 4 are both variable motors or fixed-displacement motors, and of course, other driving sources may also be adopted, which is not described herein in detail.
As shown in fig. 1, in some embodiments of the present invention, a first switching member is provided between the variable displacement pump 2 and the second transmission assembly 7.
The first switching member may be a first clutch 12, and the second transmission assembly 7 is connected to or disconnected from the variable displacement pump 2 by controlling the first clutch 12, thereby selecting a desired operation mode.
As shown in fig. 1, in some embodiments of the present invention, a second switching member is disposed between the first transmission assembly 6 and the fifth transmission assembly 10.
The second switching member may be a second clutch 13, and the second clutch 13 is controlled to connect or disconnect the engine 1 and the fifth transmission assembly 10, that is, the planetary gear and the first transmission assembly 6, so as to select a desired operation mode.
As shown in fig. 1, in some embodiments of the present invention, a brake 14 is disposed on the fourth transmission assembly 9, and the brake 14 is used for braking the fourth transmission assembly 9 and the third transmission assembly 8. The fourth transmission assembly 9 is braked by the brake 14, so that the connection or disconnection between the third transmission assembly 8 and the fourth transmission assembly 9 can be controlled, and a required working mode can be selected, wherein the fourth transmission assembly 9 can select a duplicate gear to facilitate the connection with the fifth transmission assembly 10.
As shown in fig. 1, in some embodiments of the present invention, the transmission system further includes a first accumulator 15, the first accumulator 15 is connected to the variable pump 2, the first driving device 3 and the second driving device 4 through pipelines, and both the first driving device 3 and the second driving device 4 are variable motors or fixed displacement motors.
In some embodiments of the invention, as shown in fig. 1, the first accumulator 15 is connected to the first and second driving devices 3 and 4 via a control valve 17, and the control valve 17 is connected to the controller 5. The control valve 17 enables flow to and from the hydraulic line.
In some embodiments of the invention, as shown in fig. 1, the transmission system further comprises a second accumulator 16, the second accumulator 16 being connected to the first drive means 3 via a line.
By arranging the first energy accumulator 15 and the second energy accumulator 16, high-low pressure energy of a hydraulic system in a vehicle can be recovered, high-low pressure fluctuation of the system can be prevented, and the purpose of recovering high-low pressure energy can be achieved, wherein the first energy accumulator 15 can be a high-pressure energy accumulator, and the second energy accumulator 16 can be a low-pressure energy accumulator.
As shown in fig. 1, the following operation modes are selected by way of example to illustrate the operation principle of the present invention:
when the vehicle is in a parking state, if the energy stored by the high-pressure energy accumulator is sufficient, namely the energy reaches a preset energy value, controlling the engine 1 to be closed; if the energy stored in the high-pressure energy accumulator is off the specified line, namely below the preset energy value, the second clutch 13 is controlled to be disconnected, the first clutch 12 is combined, and the engine 1 drives the first transmission assembly 6 (gear) to drive the second transmission assembly 7 (gear), so that the variable pump 2 is driven to supplement energy to the high-pressure energy accumulator;
when the vehicle is in a starting state, the first clutch 12 and the second clutch 13 are controlled to be disconnected, the brake 14 brakes, the high-pressure energy accumulator drives the first driving device 3 (variable motor), the first driving device 3 (variable motor) drives the sixth transmission assembly 11 (gear), the sixth transmission assembly 11 drives the gear ring of the fifth transmission assembly 10 (planetary gear set), the vehicle starts, and meanwhile, the low-pressure energy accumulator absorbs certain pressure fluctuation, so that the starting process of the vehicle is stable;
when the vehicle runs at a low speed (the engine 1 and the variable pump 2 are connected in series, namely a hydraulic system), the second clutch 13 is controlled to be disconnected, the first clutch 12 is closed, the engine 1 drives the second transmission assembly 7 (a gear) to drive the variable pump 2 through the first transmission assembly 6 (the gear), the variable pump 2 respectively drives the first driving device 3 (a variable motor) to drive the planetary gear set and the second driving device 4 (the variable motor) to drive the planetary gear set, the gear ring is driven through the planet carrier, and the vehicle runs under the condition of low speed and large torque;
when the vehicle runs at a normal speed (a series-parallel mode), the first clutch 12 and the second clutch 13 are combined, the brake 14 is released, at the moment, the power of the engine 1 is divided, one part of the power is transmitted to a gear ring through the fifth transmission assembly 10, namely a planet carrier, to drive the vehicle to run, the other part of the power drives the variable pump 2 through the first transmission assembly 6 and the second transmission assembly 7, one part of the energy of the variable pump 2 drives the second driving device 4 to drive a sun gear of the fifth transmission assembly 10 to realize rotation speed coupling, the stepless speed change function of the driving system is realized, the other part of the energy of the variable pump 2 drives the first driving device 3 (a variable motor) to drive the gear ring of the planetary gear set to realize torque coupling, and when the power provided by the engine 1 is greater than the power required by the vehicle to run, the high-pressure energy accumulator recovers part of the.
When the vehicle runs at the highest speed (driven in a series-parallel mode), the steering directions of the two variable motors are changed to drive the sun wheel to change, so that the maximum speed of the vehicle is realized, meanwhile, the high-voltage energy accumulator provides energy for the two variable motors, and the speed is adjusted by adjusting the rotating speed of the second driving device 4 (variable motor), so that the purpose of stepless speed change is realized.
When the vehicle is selected to be driven in a hybrid parallel mode, the first clutch 12 and the second clutch 13 are closed, the brake 14 is braked, the power flow of the engine 1 is divided into two parts, one part drives the variable pump 2 through the first transmission assembly 6 and the second transmission assembly 7, the variable pump 2 drives the first driving device 3 to drive the gear ring of the planetary gear set, the other part of the power of the engine 1 directly drives the gear ring, and the gear ring drives the planet carrier, so that torque coupling is realized, and the vehicle is driven to run at high speed.
When the vehicle is in pure mechanical drive, the first clutch 12 is controlled to be disconnected, the second clutch 13 is controlled to be closed, the brake 14 brakes, the engine 1 drives the planet carrier, the planet carrier drives the gear ring to drive the vehicle to run, the working condition is pure mechanical drive, and the requirement of the running speed of the vehicle is met when the engine 1 works in an optimal economic oil consumption area.
When the vehicle is in a deceleration or braking state, the first clutch 12 and the second clutch 13 are controlled to be disconnected, the two variable motors respectively supplement energy to the energy accumulator, and the energy accumulator realizes energy recovery.
When the vehicle selects reversing, the engine 1 is controlled to be closed, the first clutch 12 and the second clutch 13 are disconnected, the brake 14 brakes, the high-pressure energy accumulator drives the first driving device 3 (variable displacement motor), the first driving device 3 drives the sixth transmission assembly 11 (gear), and then the fifth transmission assembly 10 (planetary gear set) is driven, reversing is achieved, and oil consumption is saved.
Embodiments of another aspect of the present application also present a vehicle, wherein the vehicle comprises a driveline of the vehicle as described above. The embodiment has the transmission system in any of the above embodiments, and therefore, the beneficial effects of the transmission system are not described herein again.
In summary, in the transmission system of the vehicle of the present invention, the hybrid transmission system is realized by the hybrid use of the variable displacement pump, the first driving device, the second driving device and the engine, the transmission of each transmission assembly is performed, the first driving device is controlled to adjust the output torque, the second driving device is controlled to adjust the rotation speed, the coupling of the rotation speed and the torque is realized, the stepless speed change is achieved, and the engine can work in the highest efficiency region at different rotation speeds, in addition, various working modes can be selected and switched in the arrangement of the clutch and the brake, and meanwhile, the energy recovery and release are realized through the energy accumulator, the working mode of the hybrid transmission system is adjusted, so that the engine always works in the high efficiency region, and the purpose of reducing the oil consumption is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A transmission system of a vehicle, characterized by comprising:
the engine is connected with the first transmission assembly;
the variable pump is connected with the first transmission assembly through a second transmission assembly, and is respectively connected with a first driving device and a second driving device and used for providing power for the first driving device and the second driving device;
the controller is respectively connected with the variable pump, the first driving device and the second driving device;
the first transmission assembly is connected with the fifth transmission assembly, the first driving device is connected with the fifth transmission assembly through the sixth transmission assembly, the second driving device is connected with the fourth transmission assembly through the third transmission assembly, the fourth transmission assembly is connected with the fifth transmission assembly, and the fifth transmission assembly is connected with a transmission shaft of a vehicle.
2. The vehicle driveline of claim 1, wherein a first switch is disposed between the variable displacement pump and the second transmission assembly.
3. The transmission system of a vehicle according to claim 1, characterized in that a second switching member is provided between the first transmission assembly and the fifth transmission assembly.
4. The vehicle driveline of claim 1, wherein a brake is provided on the fourth transmission assembly for braking the fourth transmission assembly and the third transmission assembly.
5. The vehicle driveline of claim 1, further comprising a first accumulator connected by conduits to the variable displacement pump, the first drive device, and the second drive device, respectively.
6. The vehicle driveline of claim 5, wherein a control valve is provided on a conduit connecting the first accumulator to the first drive means and the second drive means, the control valve being connected to the controller.
7. A transmission system of a vehicle according to any one of claims 1 to 6, characterised by further comprising a second accumulator connected to the first drive means by a conduit.
8. The vehicle driveline of claim 1, wherein the first drive and second drive are both variable or fixed displacement motors.
9. The vehicle driveline of claim 1, wherein the first, second, third, fourth and sixth transmission assemblies are each a gear or gear set; and/or
The fifth transmission assembly is a planetary gear set.
10. A vehicle characterized by comprising the transmission system of the vehicle of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208218.1A CN111516478A (en) | 2020-03-23 | 2020-03-23 | Transmission system of vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208218.1A CN111516478A (en) | 2020-03-23 | 2020-03-23 | Transmission system of vehicle and vehicle |
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| CN111516478A true CN111516478A (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010208218.1A Pending CN111516478A (en) | 2020-03-23 | 2020-03-23 | Transmission system of vehicle and vehicle |
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Application publication date: 20200811 |
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