CN213176225U

CN213176225U - Cooling control oil way, cooling and lubricating hydraulic circuit and vehicle

Info

Publication number: CN213176225U
Application number: CN202021524946.5U
Authority: CN
Inventors: 王燕; 史伟奇
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-05-11
Anticipated expiration: 2030-07-27

Abstract

The utility model relates to a cooling oil circuit technical field discloses a cooling control oil circuit, cooling lubrication hydraulic circuit and vehicle. In the cooling control oil way, a first control valve and an oil pump are arranged on the first oil way; the other end of the second oil way is connected to an oil path section of the first oil way, which is positioned between the oil pump and the other end of the first oil way, and a second control valve is arranged on the second oil way; one end of the bypass oil path is connected to an oil path section of the first oil path between the oil pump and the first control valve, and a third control valve is arranged on the bypass oil path; when the oil pump executes one of positive rotation and reverse rotation, the first control valve is opened, and the second control valve and the third control valve are closed; when the oil pump performs the other of the normal rotation and the reverse rotation, the first control valve is closed, and the second control valve and the third control valve are opened. The cooling control oil passage can supply cooling oil to the cooling oil passage to ensure cooling during both forward and reverse rotation of the oil pump, and can cool the drive motor well without starting the engine, for example, during the EV mode.

Description

Cooling control oil way, cooling and lubricating hydraulic circuit and vehicle

Technical Field

The utility model relates to a cooling oil circuit technical field specifically relates to a cooling control oil circuit, a cooling lubrication hydraulic circuit and a vehicle.

Background

The current hybrid vehicle type has an HEV (hybrid electric) mode and an EV (electric only) mode, and the cooling of the motor is performed in an oil cooling manner. The cooling and lubrication hydraulic circuit typically employs a dual mechanical pump scheme, where one mechanical pump is engaged with the engine for cooling and clutch control, and the other mechanical pump is engaged with the wheel side gears for cooling and lubrication.

When the vehicle is in HEV mode and in reverse gear, the drive motor drives the vehicle, at which time a mechanical pump engaged with the engine pumps oil to provide a cooling flow to the drive motor and generator for cooling. When the vehicle is in an EV mode and is in reverse gear, the driving motor drives the vehicle, the mechanical pump meshed with the wheel-side gear is not started, the engine is not started, and therefore the mechanical pump meshed with the engine cannot pump oil, at the moment, the driving motor cools off no cooling oil when in reverse gear, if the driving motor is in the working condition for a long time, the risk of burning out the driving motor exists, therefore, the engine needs to be frequently started to drive the mechanical pump meshed with the engine to pump oil so as to cool the driving motor, however, oil consumption can be increased due to frequent starting of the engine, and the comfort of the vehicle can be reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cooling control oil circuit, this cooling control oil circuit can both provide the cooling oil in order to ensure the cooling to the cooling oil duct when the oil pump is just reversing, for example, when this cooling control oil circuit is used to the hybrid vehicle type, when the EV mode, does not start the engine and also can carry out good cooling to driving motor.

In order to achieve the above object, the utility model provides a cooling control oil circuit, this cooling control oil circuit includes: one end of the first oil way is used for being communicated with an oil source, the other end of the first oil way is used for being communicated with a cooling oil duct, and the first oil way is provided with a first control valve and an oil pump which can rotate positively and negatively, wherein the first control valve and the oil pump are arranged at intervals in the direction from one end of the first oil way to the other end of the first oil way; one end of the second oil way is used for being communicated with an oil source, the other end of the second oil way is connected to an oil section of the first oil way, which is positioned between the oil pump and the other end of the first oil way, and a second control valve is arranged on the second oil way; one end of the bypass oil path is connected to an oil section of the first oil path between the oil pump and the first control valve, the other end of the bypass oil path is used for communicating a cooling oil path, and a third control valve is arranged on the bypass oil path; wherein, when the oil pump performs one of normal rotation and reverse rotation, the first control valve is opened, and the second control valve and the third control valve are closed; when the oil pump performs the other of the normal rotation and the reverse rotation, the first control valve is closed, and the second control valve and the third control valve are opened.

In the technical scheme, when the oil pump performs one of forward rotation and reverse rotation, the first control valve is opened, the second control valve and the third control valve are closed, and at the moment, cooling oil pumped by the oil pump can be conveyed to a cooling oil passage through the first oil passage, for example, the cooling oil passage of the driving motor is cooled; when the oil pump executes the other one of forward rotation and reverse rotation, the first control valve is closed, the second control valve and the third control valve are opened, and at the moment, the oil pump can pump cooling oil to the cooling oil duct through the second oil passage, a part of the first oil passage and the bypass oil passage, so that the oil pump can pump the cooling oil to the cooling oil duct to ensure cooling when the oil pump, such as a mechanical pump, rotates forward and reverse.

Further, the other end of the first oil passage and the other end of the bypass oil passage join and form a single oil outlet port for communicating the cooling oil passages.

Further, the cooling control oil path includes a three-way joint, wherein the other end of the first oil path and the other end of the bypass oil path are respectively connected to respective corresponding ports of the three-way joint.

Further, at least one of the first control valve, the second control valve, and the third control valve is an oil inlet check valve.

Further, the oil pump is a mechanical pump.

Still further, the oil pump is a mechanical pump for driving connection with a wheel-side gear.

Further, the cooling control oil passage is formed as a cooling control oil passage module.

In addition, the other end of the first oil path and the other end of the bypass oil path are used for communicating a cooling oil path of a driving motor of the vehicle.

Additionally, the utility model provides a cooling and lubrication hydraulic circuit, including driving motor, wheel limit gear, cooling oil duct and above arbitrary the cooling control oil circuit, wherein, the other end of first oil circuit with the other end of other branch oil circuit with the cooling oil duct intercommunication, driving motor's cooling oil circuit with cooling oil duct intercommunication, wherein, driving motor is used for the rotation of wheel of drive vehicle, wheel limit gear is used for rotating under the drive of wheel, wheel limit gear with oil pump power transmission connects

Additionally, the utility model provides a vehicle, the vehicle is provided with above the cooling and lubrication hydraulic circuit.

Drawings

Fig. 1 is a schematic diagram of a cooling control oil circuit according to an embodiment of the present invention.

Description of the reference numerals

1-a first oil way, 2-a second oil way, 3-a bypass oil way, 4-an oil source, 5-a cooling oil way, 6-a first control valve, 7-an oil pump, 8-a second control valve, 9-a third control valve and 10-a three-way joint.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Referring to fig. 1, the cooling control oil circuit provided by the present invention includes a first oil circuit 1, a second oil circuit 2 and a bypass oil circuit 3, wherein one end of the first oil circuit 1 is used for communicating with an oil source 4, the other end of the first oil circuit 1 is used for communicating with a cooling oil circuit 5, and the first oil circuit 1 is provided with a first control valve 6 and an oil pump 7 capable of rotating forward and backward, which are arranged at intervals in a direction from one end of the first oil circuit to the other end; one end of the second oil way 2 is used for being communicated with an oil source 4, the other end of the second oil way 2 is connected to an oil section, located between the oil pump 7 and the other end of the first oil way 1, and a second control valve 8 is arranged on the second oil way 2; one end of the bypass oil path 3 is connected to an oil path section of the first oil path 1 between the oil pump 7 and the first control valve 6, the other end of the bypass oil path 3 is used for communicating the cooling oil path 5, and the bypass oil path 3 is provided with a third control valve 9; wherein, when the oil pump 7 performs one of the normal rotation and the reverse rotation, the first control valve 6 is opened, and the second control valve 8 and the third control valve 9 are closed; when the oil pump performs the other of the normal rotation and the reverse rotation, the first control valve 6 is closed, and the second control valve 8 and the third control valve 9 are opened.

In the cooling control oil passage, when the oil pump 7 performs one of normal rotation and reverse rotation, the first control valve 6 is opened, and the second control valve 8 and the third control valve 9 are closed, and at this time, the cooling oil pumped by the oil pump 7 can be delivered to the cooling oil passage 5 through the first oil passage 1, as indicated by a dotted arrow in fig. 1, for example, the cooling oil passage of the drive motor is cooled; and when the oil pump 7 performs the other one of the forward rotation and the reverse rotation, the first control valve 6 is closed, and the second control valve 8 and the third control valve 9 are opened, at this time, the oil pump 7 can pump cooling oil to the cooling oil duct 5 through the second oil path 2, a part of the first oil path 1 and the bypass oil path 3, as shown by the implementation arrow in fig. 1, so that the oil pump 7 can pump the cooling oil to the cooling oil duct 5 to ensure cooling when, for example, the mechanical pump is rotating forward and backward, when the cooling control oil path is applied to a hybrid vehicle type, in an EV mode, the cooling oil can be pumped to the cooling oil duct of the driving motor through the forward rotation and the reverse rotation of the oil pump 7 to perform cooling regardless of the driving motor driving the vehicle to advance or reverse the vehicle to reverse, and therefore, the oil consumption of the vehicle is reduced, and the comfort is improved.

In addition, the other end of the first oil path 1 and the other end of the bypass oil path 3 may be separately disposed, so that, in practical use, only the other end of the first oil path 1 and the other end of the bypass oil path 3 need to be respectively communicated with the cooling oil passage 5. Or, as shown in fig. 1, the other end of the first oil path 1 and the other end of the bypass oil path 3 are merged to form a single oil outlet port for communicating with the cooling oil path 5, so that a single oil outlet port is formed, and in practical use, the oil outlet port only needs to be conveniently and quickly communicated with the cooling oil path 5.

Of course, the other end of the first oil passage 1 and the other end of the bypass oil passage 3 may be merged in various ways, for example, in one way, the other end of the first oil passage 1 and the other end of the bypass oil passage 3 may be directly integrated to form a Y-shaped structure. Or, as shown in fig. 1, in another mode, the cooling control oil path includes a three-way joint 10, where the other end of the first oil path 1 and the other end of the bypass oil path 3 are respectively connected to respective corresponding ports of the three-way joint 10, so that the third port of the three-way joint 10 is used as an oil outlet port, and in actual use, only the third port of the three-way joint needs to be communicated with the cooling oil path 5.

In addition, the first control valve 6, the second control valve 8 and the third control valve 9 may be manual valves, for example, in applications where manual operation is possible, the first control valve 6, the second control valve 8 and the third control valve 9 may open and close the respective control valves according to actual requirements. Alternatively, the first control valve 6, the second control valve 8 and the third control valve 9 may be electronic control valves such as solenoid valves, and the control unit may control the opening and closing of the respective control valves according to the requirements, for example, the control unit of the vehicle may control the opening and closing of the respective control valves according to the forward and reverse rotations of the driving motor. Alternatively, at least one of the first control valve 6, the second control valve 8 and the third control valve 9 is an oil inlet check valve, for example, the first control valve 6, the second control valve 8 and the third control valve 9 are oil inlet check valves, so that the opening and closing of each control valve can be realized by using the oil pressure difference between the two sides of the oil inlet check valve, for example, when the oil pump 7 rotates forward to supply cooling oil through a dotted arrow, as shown by the plus sign and the minus sign of the dotted line, the first control valve 6 is opened, the second control valve 8 and the third control valve 9 are closed, and when the oil pump 7 rotates backward to supply cooling oil through a solid arrow, as shown by the plus sign and the minus sign of the solid line, the first control valve 6 is closed, and the second control valve 8 and the third control valve 9 are opened.

In addition, the oil pump 7 may be an electronic pump, and the forward and reverse rotation of the oil pump 7 may be controlled by a control unit, for example. Alternatively, the oil pump 7 is a mechanical pump, and in this case, the mechanical pump can control the forward and reverse rotation by driving a motor. For example, the power transmission connection can be realized with a driving motor of the vehicle, when the driving motor drives the vehicle to move forward, the driving motor simultaneously drives the mechanical pump to rotate forward, and when the driving motor drives the vehicle to reverse, the driving motor rotates reversely to drive the mechanical pump to rotate reversely.

Alternatively, the mechanical pump may be a separate mechanical pump. Alternatively, the oil pump 7 is a mechanical pump for driving connection with a wheel-side gear. That is, a cooling oil path of a mechanical pump drivingly connected to the wheel-side gear is used to supply the cooling liquid to the drive motor when the drive motor is rotating in the forward and reverse directions.

In addition, the cooling control oil path may have a pipeline structure as shown in fig. 1, or the cooling control oil path may be formed as a cooling control oil path module, and in actual use, only one end of the first control valve 6 and the second control valve 8 may be communicated with the oil source 4, and the other end of the first control valve 6 and the second control valve 8 may be communicated with the cooling oil path 5.

In addition, the cooling control oil passage may be used in any application requiring cooling, for example, in one embodiment, the other end of the first oil passage 1 and the other end of the bypass oil passage 3 are used to communicate with a cooling oil passage 5 of a drive motor of a vehicle. For example, when the driving motor is driven forward to drive the vehicle to move forward, the mechanical pump is driven to rotate forward to provide cooling oil to the driving motor along the arrow of the dotted line, and when the driving motor is driven to rotate backward to drive the vehicle to move backward, the mechanical pump is driven to rotate backward to provide cooling oil to the driving motor along the arrow of the solid line.

Furthermore, the utility model provides a cooling and lubrication hydraulic circuit, this cooling and lubrication hydraulic circuit include driving motor, wheel limit gear, cooling oil duct 5 and above arbitrary the cooling control oil circuit, wherein, the other end of first oil circuit 1 and the other end and the cooling oil duct 5 intercommunication of other branch oil circuit 3, driving motor's cooling oil circuit and cooling oil duct intercommunication, wherein, driving motor is used for the rotation of wheel of drive vehicle, wheel limit gear is used for rotating under the drive of wheel, and wheel limit gear and 7 power transmission of oil pump are connected. Thus, after the cooling and lubricating hydraulic circuit is applied to a vehicle, the driving motor can drive the wheel to rotate so as to drive the vehicle, the wheel can drive the wheel-side gear to rotate forwards and backwards through the forward and reverse rotation of the wheel, and meanwhile, the wheel-side gear drives the oil pump 7 to rotate forwards and backwards, so that cooling and lubricating can be provided for the driving motor when the vehicle moves forwards and reverses.

In addition, the cooling gallery 5 may be in communication with any oil passage where cooling oil is required to flow.

Furthermore, the utility model provides a vehicle, this vehicle be provided with above arbitrary the cooling and lubrication hydraulic circuit. For example, in one embodiment, when the vehicle is a hybrid vehicle, such as a two-motor hybrid vehicle, having an HEV (hybrid electric) mode in which the drive motor drives the vehicle when the vehicle is in a reverse gear state, and an EV (electric only) mode in which a mechanical pump engaged with the engine pumps oil to provide a cooling flow to the drive motor and the generator for cooling. In the EV mode, the engine may not be started, at this time, the mechanical pump engaged with the engine stops pumping oil, at this time, the driving motor drives the vehicle to advance and reverse, at this time, the forward and reverse rotation of the driving motor drives the mechanical pump in transmission connection with the wheel-side gear to rotate forward and reverse, as shown by a dotted arrow and a solid arrow in fig. 1, the cooling oil can be supplied to the driving motor (or to the generator of the vehicle if necessary) to cool, so that frequent starting of the engine in the EV mode is avoided, oil consumption is reduced, and comfort of the vehicle is improved.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. A cooling control oil passage, characterized by comprising:

the cooling system comprises a first oil way (1), wherein one end of the first oil way (1) is used for being communicated with an oil source (4), the other end of the first oil way (1) is used for being communicated with a cooling oil channel (5), and a first control valve (6) and an oil pump (7) capable of rotating forwards and reversely are arranged on the first oil way (1) at intervals in the direction from one end of the first oil way to the other end of the first oil way;

one end of the second oil way (2) is used for being communicated with an oil source (4), the other end of the second oil way (2) is connected to an oil section of the first oil way (1) between the oil pump (7) and the other end of the first oil way (1), and a second control valve (8) is arranged on the second oil way (2);

one end of the bypass oil way (3) is connected to an oil section of the first oil way (1) between the oil pump (7) and the first control valve (6), the other end of the bypass oil way (3) is used for being communicated with a cooling oil duct (5), and a third control valve (9) is arranged on the bypass oil way (3);

wherein, when the oil pump (7) performs one of normal rotation and reverse rotation, the first control valve (6) is opened, and the second control valve (8) and the third control valve (9) are closed; when the oil pump performs the other of the normal rotation and the reverse rotation, the first control valve (6) is closed, and the second control valve (8) and the third control valve (9) are opened.

2. The cooling control oil passage according to claim 1, characterized in that the other end of the first oil passage (1) and the other end of the bypass oil passage (3) merge and form a single oil outlet port for communicating with a cooling oil passage (5).

3. The cooling control oil passage according to claim 2, characterized by comprising a three-way joint (10), wherein the other end of the first oil passage (1) and the other end of the bypass oil passage (3) are respectively connected to respective corresponding ports of the three-way joint (10).

4. The cooling control circuit according to claim 1, characterized in that at least one of the first control valve (6), the second control valve (8), and the third control valve (9) is an oil-intake check valve.

5. The cooling control oil circuit according to claim 1, characterized in that the oil pump (7) is a mechanical pump.

6. Cooling control oil circuit according to claim 5, characterized in that the oil pump (7) is a mechanical pump for a wheel-side gear transmission connection.

7. The cooling control oil passage according to claim 1, characterized in that the cooling control oil passage is formed as a cooling control oil passage module.

8. The cooling control oil passage according to any one of claims 1 to 7, characterized in that the other end of the first oil passage (1) and the other end of the bypass oil passage (3) are used to communicate with a cooling oil passage (5) of a drive motor of a vehicle.

9. A cooling and lubricating hydraulic circuit, characterized by comprising a driving motor, a wheel-side gear, a cooling oil channel (5) and the cooling control oil channel of any one of claims 1-8, wherein the other end of the first oil channel (1) and the other end of the bypass oil channel (3) are communicated with the cooling oil channel (5), and the cooling oil channel of the driving motor is communicated with the cooling oil channel, wherein the driving motor is used for driving wheels of a vehicle to rotate, the wheel-side gear is used for rotating under the driving of the wheels, and the wheel-side gear is in power transmission connection with the oil pump (7).

10. A vehicle characterized in that it is provided with a cooling and lubricating hydraulic circuit according to claim 9.