CN110778704A

CN110778704A - Hybrid power hydraulic system and vehicle

Info

Publication number: CN110778704A
Application number: CN201911029940.2A
Authority: CN
Inventors: 宋勇; 李超; 卢玮玮; 夏广文
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-02-11
Anticipated expiration: 2039-10-25
Also published as: CN110778704B

Abstract

The invention discloses a hybrid power hydraulic system and a vehicle, wherein the system comprises a hydraulic oil supply device, a main oil way and a cooling oil way, the main oil way comprises a mechanical pump, a motor oil way, a clutch oil way and a pressure regulating oil way, and a first oil outlet of the hydraulic oil supply device is communicated with an oil inlet of the mechanical pump; the motor oil circuit comprises a gear shifting pressure valve, a gear shifting flow valve and a gear shifting reversing valve which are sequentially communicated, and the clutch oil circuit comprises a clutch operating valve and a clutch which are sequentially communicated; the pressure regulating oil way is used for regulating oil pressure in the oil way; the cooling oil path comprises an electronic pump, an electronic pump cooling switching valve, a motor cooling branch and a clutch cooling branch, wherein the clutch cooling branch comprises a clutch pressure valve and a clutch cooling valve which are sequentially communicated.

Description

Hybrid power hydraulic system and vehicle

Technical Field

The invention relates to the field of vehicle control, in particular to a hybrid power hydraulic system and a vehicle.

Background

With the environmental pollution and increasingly strict fuel consumption and emission regulations at home and abroad, various automobile companies are forced to develop power systems with ultrahigh fuel economy, and a hybrid power system which gives consideration to both fuel economy and technical maturity becomes an ideal choice at the present stage. Hybrid vehicles employ hybrid drive technology, the power sources of which include a hybrid electric machine and an engine. The hybrid driving technology is that a driving motor is added in a traditional engine gearbox power system to complete hybrid output of power of an engine and the motor.

Similar hybrid transmissions on the market typically operate with shifting and cooling performed separately, typically with oil cooling for motor cooling and electronic or clutch operators for clutch and synchronizer shifting, thus separating the shifting and clutch control from motor cooling, increasing system cost and also increasing system space.

Therefore, new technical solutions are urgently needed to solve the defects of the prior art.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a hybrid hydraulic system and a vehicle, which are designed to solve the problems of shifting and motor cooling of a parallel shaft type two-gear or multi-gear hybrid transmission.

In order to solve the technical problems, the specific technical scheme of the invention is as follows:

on one hand, the invention provides a hybrid power hydraulic system which comprises a hydraulic oil supply device, a main oil way and a cooling oil way, wherein the main oil way comprises a mechanical pump, a motor oil way, a clutch oil way and a pressure regulating oil way;

the motor oil path, the clutch oil path and the pressure regulating oil path are all communicated with an oil outlet of the mechanical pump, the motor oil path comprises a gear shifting pressure valve, a gear shifting flow valve and a gear shifting reversing valve which are sequentially communicated, the oil outlet of the gear shifting flow valve is communicated with a first motor, and the oil outlet of the gear shifting reversing valve is communicated with a second motor; the clutch oil circuit comprises a clutch operating valve and a clutch which are communicated in sequence; the pressure regulating oil path comprises a pilot pressure regulating valve and a main pressure regulating valve which are sequentially communicated, a first pressure regulating port of the main pressure regulating valve is communicated with an oil outlet of the mechanical pump, and a second pressure regulating port of the main pressure regulating valve is communicated with the cooling oil path;

the cooling oil path comprises an electronic pump, an electronic pump cooling switching valve, a motor cooling branch and a clutch cooling branch, a second oil outlet of the hydraulic oil supply device is communicated with an oil inlet of the electronic pump, an oil outlet of the electronic pump is communicated with the main oil path and the electronic pump cooling switching valve respectively, the motor cooling branch and the clutch cooling branch are communicated with an oil outlet of the electronic pump cooling switching valve, the motor cooling branch is used for cooling the first motor and the second motor, and the clutch cooling branch comprises a clutch pressure valve and a clutch cooling valve which are communicated in sequence.

Furthermore, the system also comprises a lubricating oil path, the lubricating oil path comprises a gear lubricating valve, a third oil outlet of the hydraulic oil supply device is communicated with an oil inlet of the gear lubricating valve, and an oil outlet of the gear lubricating valve is used for splashing lubricating oil to the shaft teeth.

Further, an oil outlet of the mechanical pump is also communicated with the lubricating oil path, and a third pressure regulating port of the main pressure regulating valve is communicated with the lubricating oil path.

Further, the electronic pump cooling switching valve is communicated with the main oil passage, and the opening and closing of the electronic pump cooling switching valve are controlled by the oil pressure in the main oil passage.

Further, the motor cooling branch comprises a radiator, and the radiator is communicated with the first motor cooling valve and the second motor cooling valve respectively.

Further, the radiator is also in communication with the clutch pressure valve.

Furthermore, the oil outlet of the hydraulic oil supply device, the main oil way and the cooling oil way are all provided with pressure filters, and the pressure filters are used for cleaning oil.

Furthermore, the electronic pump is connected with a control motor, and the control motor is used for controlling the electronic pump to work.

Optionally, the first motor is a TM motor, and the second motor is an ISG motor.

In another aspect, the invention further provides a vehicle, wherein the vehicle is a hybrid vehicle, and the vehicle comprises the hybrid hydraulic system provided above.

By adopting the technical scheme, the hybrid power hydraulic system and the vehicle have the following beneficial effects that:

1. according to the hybrid power hydraulic system and the vehicle, the mechanical pump and the electronic pump simultaneously provide working pressure oil for motor cooling and clutch operation and gear shifting, parts are saved, the structure is compact, and the working efficiency of the system is improved.

2. According to the hybrid power hydraulic system and the vehicle, the intelligent switching of the motor cooling oil provided by the electronic pump or the oil used by other systems such as gear shifting and the like is completed through the hydraulic control electronic pump cooling switching valve loop, and the power load of the electronic pump is reduced.

3. According to the hybrid power hydraulic system and the vehicle, the clutch cooling valve associated with the control of the clutch pressure valve is opened and closed, the supply of the clutch cooling oil is realized, and the cost is reduced

4. According to the hybrid power hydraulic system and the vehicle, the ISG gear and the TM gear are switched through the cooperative work of the gear shifting pressure valve, the gear shifting flow valve and the gear shifting reversing valve, the number of parts when ISG gears and TM gears are respectively controlled is reduced, and the cost is reduced.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of a hybrid hydraulic system according to the present invention.

In the figure: 1-hydraulic oil supply device, 2-mechanical pump, 3-shift pressure valve, 4-shift flow valve, 5-shift change valve, 6-first motor, 7-second motor, 8-clutch operation valve, 9-clutch, 10-pilot pressure regulating valve, 11-main pressure regulating valve, 12-electronic pump, 13-electronic pump cooling switching valve, 14-clutch pressure valve, 15-radiator, 16-clutch cooling valve, 17-first motor cooling valve, 18-second motor cooling valve, 19-control motor, 20-gear lubrication valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

Example 1

Hybrid transmissions typically employ an operating regime in which shifting is performed separately from cooling, e.g., electric machine cooling employs oil cooling, while clutch and synchronizer shifting operations employ electronic shifters or clutch operators. Therefore, the operation mode separates gear shifting and clutch control from motor cooling, increases system cost, increases spatial arrangement, adopts a motor actuator to complete gear shifting and clutch operation, and has low gear shifting speed and general gear shifting smoothness; to address the above-identified problems, one embodiment of the present disclosure provides a hybrid hydraulic system that addresses some of the problems associated with two-or multi-speed hybrid transmission shifting and motor cooling.

Specifically, as shown in fig. 1, the structural schematic diagram of the hybrid hydraulic system according to this embodiment is that the system is applied to a hybrid vehicle, the system includes a hydraulic oil supply device 1, a main oil path and a cooling oil path, the main oil path includes a mechanical pump 2, a motor oil path, a clutch oil path and a pressure regulating oil path, and a first oil outlet of the hydraulic oil supply device 1 is communicated with an oil inlet of the mechanical pump 2; the utility model provides a motor oil circuit, including the motor oil circuit, the clutch oil circuit with the pressure regulating oil circuit all with the oil-out intercommunication of mechanical pump 2, that is to say, the motor oil circuit the clutch oil circuit with the pressure regulating oil circuit is parallelly connected and sets up, wherein the motor oil circuit is including the pressure valve 3 of shifting that communicates in proper order, shift flow valve 4 and the switching-over valve 5 of shifting, shift flow valve 4's oil-out and first motor 6 intercommunication, shift switching-over valve 5's oil-out and second motor 7 intercommunication, shift pressure valve 3 shift flow valve 4 with switching-over valve 5 of shifting all is connected with vehicle controller, and receive controller control, as optionally, first motor 6 is the TM motor, second motor 7 is the ISG motor.

Further, the clutch oil path comprises a clutch operating valve 8 and a clutch 9 which are communicated in sequence, and the clutch operating valve 8 is also in communication with the controller; the pressure regulating oil path is used for regulating oil pressure in the oil path and comprises a pilot pressure regulating valve 10 and a main pressure regulating valve 11 which are sequentially communicated, the pilot pressure regulating valve 10 is connected with a vehicle controller and used for regulating the main pressure regulating valve 11, the pilot pressure regulating valve 10 can be a normally low electromagnetic proportion pressure regulating valve, the main pressure regulating valve 11 is used for regulating the oil pressure in the oil path according to requirements, a first pressure regulating port of the main pressure regulating valve 11 is communicated with an oil outlet of the mechanical pump 2, and a second pressure regulating port of the main pressure regulating valve 11 is communicated with the cooling oil path.

The cooling oil path comprises an electronic pump 12, an electronic pump cooling switching valve 13, a motor cooling branch and a clutch cooling branch, a second oil outlet of the hydraulic oil supply device 1 is communicated with an oil inlet of the electronic pump 12, an oil outlet of the electronic pump 12 is respectively communicated with the main oil path and the electronic pump cooling switching valve 13, the electronic pump 12 is controlled by a control motor 19 to work, the motor cooling branch and the clutch cooling branch are both communicated with an oil outlet of the electronic pump cooling switching valve 13, the motor cooling branch is used for cooling the first motor 6 and the second motor 7, the clutch cooling branch comprises a clutch pressure valve 14 and a clutch cooling valve 16 which are sequentially communicated, the electronic pump cooling switching valve 13 is communicated with the main oil path, and the opening and closing of the electronic pump cooling switching valve 13 are controlled by oil pressure in the main oil path, for example, when the oil pressure reaches a threshold value, the electronic pump cooling switching valve 13 is opened, and the first electric motor 6, the second electric motor 7, and the clutch 9 are cooled as necessary.

Further, the motor cooling branch comprises a radiator 15, the radiator 15 is respectively communicated with a first motor cooling valve 17 and a second motor cooling valve 18, and the first motor cooling valve 17 and the second motor cooling valve 18 are also connected with a vehicle controller.

Further, the clutch pressure valve 14 is also connected to a vehicle controller for regulating the oil pressure of the clutch cooling branch to control the opening and closing of the clutch cooling valve 16, and the radiator 15 is also communicated with the clutch pressure valve 14.

Of course, the system further includes a lubricating oil path, the lubricating oil path includes a gear lubricating valve 20, a third oil outlet of the hydraulic oil supply device 1 is communicated with an oil inlet of the gear lubricating valve 20, an oil outlet of the gear lubricating valve 20 is used for splashing lubricating oil to the shaft teeth, an oil outlet of the mechanical pump 2 is further communicated with the lubricating oil path, and a third pressure regulating port of the main pressure regulating valve 11 is communicated with the lubricating oil path.

In order to improve the oil quality in the oil circuit, a plurality of pressure filters are arranged in the oil circuit for cleaning the oil quality in the oil circuit, for example, the pressure filters are arranged between the hydraulic oil supply device 1 and the mechanical pump 2, on the main oil circuit, on the clutch oil circuit, on the motor oil circuit and on the pressure regulating oil circuit.

The working principle of the hybrid power hydraulic system described in the specification is as follows:

the rotating speeds of the mechanical pump 2 and the electronic pump 12 are bound to the rotating speed of the vehicle wheel, that is, the wheel rotating speed controls the operation of the mechanical pump 2 and the electronic pump 12, and specifically, the vehicle controller may acquire the information of the rotating speed of the vehicle wheel and further control the operation of the mechanical pump 2 and the electronic pump 12. In the vehicle stop state, because the vehicle has a small requirement on power output, and therefore does not need too high oil pressure, only the electronic pump 12 can be controlled to operate to provide an oil source for a gear shifting system and other oil systems of the vehicle, during the vehicle running process, the mechanical pump 2 controls the oil pressure for gear shifting and clutch operation, at low speed, the electronic pump 2 provides a cooling oil source for the ISG and TM motors, when the vehicle speed is high, such as more than 30KPH, the mechanical pump 2 provides the oil pressure for gear shifting and clutch operation, and the electronic pump 12 supplements the insufficient cooling flow of the mechanical pump 12, wherein the supplemented flow of the electronic pump 12 is adjusted according to the running work and load of the whole vehicle, specifically, the control motor 19 is controlled by the vehicle controller to drive the electronic pump 12 to operate.

The mechanical pump 2 and the electronic pump 12 can simultaneously provide working pressure oil for motor cooling and clutch operation and gear shifting by arranging the electronic pump cooling switching valve 13, specifically, when the main oil line oil pressure is greater than the preset oil pressure of the electronic pump cooling switching valve 13, a preset speed value can be taken as a reference, which is not limited herein, the electronic pump cooling switching valve 13 is opened, the electronic pump cooling oil is directly output to the radiator 15, the power consumption of the electronic pump is reduced, the radiator 15 is respectively communicated with the first motor cooling valve 17 and the second motor cooling valve 18, and when a TM motor or an ISG needs cooling oil, the corresponding control cooling valve is opened.

In some embodiments, the cooling of the clutch 9 is controlled by the clutch cooling valve 16, the clutch cooling valve 16 is controlled by controlling the oil pressure in the oil path according to the clutch pressure valve 14, when the clutch 9 starts to work, the clutch pressure valve 14 outputs pressure oil to the clutch cooling valve 16 at the same time, the clutch cooling valve 16 is opened to provide cooling flow to the clutch 9, and the radiator 15 is also communicated with the clutch pressure valve 14, so that the cooling efficiency of the clutch 9 is further increased.

In the whole system, in order to ensure the cleanness of oil, the pressure filter in each oil way can be cleaned; the gear lubrication valve 20 can also work during the running of the vehicle, so that the splashing lubrication oil is provided for the shaft teeth during the running process, the running smoothness of the vehicle is ensured, and the energy is saved.

In some embodiments, the gear shifting of the ISG and TM motors is completed through a gear shifting reversing valve, when gear shifting is required, the gear shifting pressure valve and the gear shifting flow valve are controlled through a controller to control the oil pressure and flow conditions in an oil path, and gear shifting operation is completed through the gear shifting reversing valve, so that better gear shifting quality and gear shifting speed are achieved.

Another embodiment of the present specification also provides a vehicle that is a hybrid vehicle provided with a hybrid hydraulic system as provided above.

Through the hybrid power hydraulic system and the vehicle provided by the above, the following beneficial effects can be obtained:

1) according to the hybrid power hydraulic system and the vehicle, the mechanical pump and the electronic pump simultaneously provide working pressure oil for motor cooling and clutch operation and gear shifting, parts are saved, the structure is compact, and the working efficiency of the system is improved.

2) According to the hybrid power hydraulic system and the vehicle, the intelligent switching of the motor cooling oil provided by the electronic pump or the oil used by other systems such as gear shifting and the like is completed through the hydraulic control electronic pump cooling switching valve loop, and the power load of the electronic pump is reduced.

3) According to the hybrid power hydraulic system and the vehicle, the clutch cooling valve associated with the control of the clutch pressure valve is opened and closed, the supply of the clutch cooling oil is realized, and the cost is reduced

4) According to the hybrid power hydraulic system and the vehicle, the ISG gear and the TM gear are switched through the cooperative work of the gear shifting pressure valve, the gear shifting flow valve and the gear shifting reversing valve, the number of parts when ISG gears and TM gears are respectively controlled is reduced, and the cost is reduced.

While the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention can be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A hybrid power hydraulic system is characterized by comprising a hydraulic oil supply device (1), a main oil way and a cooling oil way, wherein the main oil way comprises a mechanical pump (2), a motor oil way, a clutch oil way and a pressure regulating oil way, and a first oil outlet of the hydraulic oil supply device (1) is communicated with an oil inlet of the mechanical pump (2);

the motor oil path, the clutch oil path and the pressure regulating oil path are all communicated with an oil outlet of the mechanical pump (2), the motor oil path comprises a gear shifting pressure valve (3), a gear shifting flow valve (4) and a gear shifting reversing valve (5) which are sequentially communicated, the oil outlet of the gear shifting flow valve (4) is communicated with a first motor (6), and the oil outlet of the gear shifting reversing valve (5) is communicated with a second motor (7); the clutch oil circuit comprises a clutch operating valve (8) and a clutch (9) which are communicated in sequence; the pressure regulating oil path comprises a pilot pressure regulating valve (10) and a main pressure regulating valve (11) which are sequentially communicated, a first pressure regulating port of the main pressure regulating valve (11) is communicated with an oil outlet of the mechanical pump (2), and a second pressure regulating port of the main pressure regulating valve (11) is communicated with the cooling oil path;

the cooling oil path comprises an electronic pump (12), an electronic pump cooling switching valve (13), a motor cooling branch and a clutch cooling branch, a second oil outlet of the hydraulic oil supply device (1) is communicated with an oil inlet of the electronic pump (12), an oil outlet of the electronic pump (12) is communicated with the main oil path and the electronic pump cooling switching valve (13) respectively, the motor cooling branch and the clutch cooling branch are communicated with an oil outlet of the electronic pump cooling switching valve (13), the motor cooling branch is used for cooling the first motor (6) and the second motor (7), and the clutch cooling branch comprises a clutch pressure valve (14) and a clutch cooling valve (16) which are communicated in sequence.

2. A hybrid hydraulic system according to claim 1, characterized in that the system further comprises a lubrication oil path, the lubrication oil path comprises a gear lubrication valve (20), the third oil outlet of the hydraulic oil supply device (1) is communicated with the oil inlet of the gear lubrication valve (20), and the oil outlet of the gear lubrication valve (20) is used for splashing lubrication oil to the shaft teeth.

3. A hybrid hydraulic system according to claim 2, characterized in that the oil outlet of the mechanical pump (2) is also in communication with the lubrication oil circuit, the third pressure regulating port of the main pressure regulating valve (11) being in communication with the lubrication oil circuit.

4. A hybrid hydraulic system according to claim 1, characterized in that the electric pump cooling switching valve (13) communicates with the main oil passage, and the opening and closing of the electric pump cooling switching valve (13) is controlled by the oil pressure in the main oil passage.

5. A hybrid hydraulic system according to claim 1, characterized in that the electric machine cooling branch comprises a radiator (15), the radiator (15) being in communication with a first electric machine cooling valve (17) and a second electric machine cooling valve (18), respectively.

6. A hybrid hydraulic system according to claim 5, characterized in that the radiator (15) also communicates with the clutch pressure valve (14).

7. A hybrid hydraulic system according to claim 1, characterized in that a pressure filter is arranged on the oil outlet of the hydraulic oil supply device (1), the main oil path and the cooling oil path, and the pressure filter is used for cleaning oil.

8. A hybrid hydraulic system according to claim 1, characterized in that the electric pump (12) is connected to a control motor (19), said control motor (19) being adapted to control the operation of the electric pump (12).

9. A hybrid hydraulic system according to claim 1, characterized in that the first electric machine (6) is a TM machine and the second electric machine (7) is an ISG machine.

10. A vehicle, which is a hybrid vehicle, characterized in that it comprises a hybrid hydraulic system according to any one of claims 1 to 9.