CN207609647U - Double-clutch automatic gearbox hydraulic oil supply system and motor vehicle - Google Patents

Abstract

The utility model discloses a hydraulic oil supply system of a dual-clutch automatic transmission and a motor vehicle. The hydraulic oil supply system of the dual-clutch automatic transmission includes an oil source; a high-pressure circuit, and the high-pressure circuit includes a main oil circuit, a high-pressure pump and an electronic pump. The high-pressure pump and the electronic pump are arranged in parallel on the main oil circuit; a low-pressure circuit, the low-pressure circuit includes a low-pressure pump output oil circuit, a low-pressure pump and an electromagnetic reversing valve arranged on the low-pressure pump output oil circuit; and a circuit oil circuit; the low-pressure pump and the high-pressure pump are connected in series to form a main oil pump, and are driven by a common drive unit, and the electromagnetic reversing valve has three switching positions. The motor vehicle includes the above-mentioned dual-clutch automatic transmission hydraulic oil supply system. The utility model has the advantages of less loss, less manufacturing difficulty, and lower cost.

Description

Dual-clutch automatic transmission hydraulic oil supply system and motor vehicle

technical field

The utility model relates to the technical field of dual-clutch transmissions for automobiles, in particular to a hydraulic oil supply system of a dual-clutch automatic transmission and a motor vehicle.

Background technique

Traditional dual-clutch automatic transmission hydraulic oil supply system is usually supplied to the entire hydraulic system by a single quantitative mechanical pump. The driving unit of the pump is usually the engine. When the speed increases, the excess flow of the system will be wasted, causing great In order to reduce energy consumption, a variable displacement pump appeared later, which can adjust the output flow to a certain extent, and a quantitative mechanical pump is connected in parallel with an electronic pump to realize the reduction of the main pump through the auxiliary pressure building of the electronic pump. Displacement and increase the start-stop function to reduce energy consumption, but still can not meet the increasingly stringent fuel consumption requirements, until the emergence of the high-pressure circuit and low-pressure circuit separate supply device to truly realize the distribution of hydraulic power on demand, greatly reducing the energy consumption.

Patent document CN 105090134 A discloses a hydraulic supply device for an automatic or automated transmission of a motor vehicle, especially a dual clutch transmission, which has a high-pressure circuit with a pressure accumulator and which is supplied by means of a high-pressure pump a low-pressure circuit fed by a low-pressure pump, wherein the high-pressure pump and the low-pressure pump are driven by a common drive unit; a valve arranged downstream of the high-pressure pump, which has three switching positions, wherein In a first switching position, the high-pressure circuit can be supplied by means of the high-pressure pump, and in a second switching position, the outlet side of the high-pressure pump is connected to a container or to the inlet side of the high-pressure pump, : The valve has a third switching position in which the high-pressure circuit is connected to the container. However, in actual practice, the pressure of the high-pressure circuit of the oil supply device is relatively high and is usually several times the conventional pressure of the dual-clutch hydraulic system, and the high-pressure pump needs to be supplied by the accumulator of the high-pressure circuit, so the sealing of the entire hydraulic system The requirements are relatively high, and the strength and precision of related components are relatively high, so the manufacturing cost and industrialization of the system are relatively difficult. Few domestic suppliers can complete the relevant key parts. The high-pressure pump and the above-mentioned The low-pressure pump is driven by a common drive unit, and the preferred drive unit is a motor. Due to the high pressure of the high-pressure circuit, the total hydraulic power of the double-pump mechanism is not low, and the required motor power is relatively large, and the working time is long, making it difficult to manufacture the motor. big.

Utility model content

The utility model provides a hydraulic oil supply system of a dual-clutch automatic transmission and a motor vehicle, so that the hydraulic oil supply system of the dual-clutch automatic transmission has less loss and energy efficiency, is less difficult to manufacture, lower in cost, and is easier to realize industrialization. The pressure of the high-pressure circuit of the structure is relatively low, and The sealing requirements are relatively low, which can reduce the manufacturing cost and difficulty of the entire transmission hydraulic system.

The utility model realizes above-mentioned object through following technical scheme:

A hydraulic oil supply system for a dual-clutch automatic transmission, comprising:

Oil source;

A high-pressure circuit, the high-pressure circuit includes a main oil circuit, a high-pressure pump and an electronic pump, and the high-pressure pump is arranged on the main oil circuit in parallel with the electronic pump;

A low-pressure circuit, the low-pressure circuit includes a low-pressure pump output oil circuit, a low-pressure pump and an electromagnetic reversing valve arranged on the low-pressure pump output oil circuit; and

circuit oil circuit;

It is characterized in that: the low-pressure pump and the high-pressure pump are connected in series to form the main oil pump, and are driven by a common drive unit; the electromagnetic reversing valve has three switch positions, and the first switch position realizes the supply to the low-pressure circuit by means of the low-pressure pump In the second switch position, the low-pressure pump is connected to the oil return circuit to realize oil return. In the third switch position, an auxiliary pressure-building oil circuit is arranged between the low-pressure pump and the high-pressure circuit.

Further, a first output one-way valve, a second output one-way valve and a third output one-way valve are respectively provided on the outlet sides of the high-pressure pump, the electronic pump and the low-pressure pump.

Further, an oil suction filter is also included, and the oil suction filter is arranged on the connecting pipe between the oil source and the inlet of the high pressure pump, low pressure pump and electronic pump.

Further, the electromagnetic reversing valve is an on-off electromagnetic valve.

Further, in the first switch position of the electromagnetic reversing valve, the output oil circuit of the low-pressure pump is connected with a lubricating oil circuit.

Further, in the second switching position of the electromagnetic reversing valve, the output oil circuit of the low-pressure pump is connected to the oil return circuit, and the oil return circuit is connected to the oil inlets of the low-pressure pump and the high-pressure pump.

Further, in the third switch position of the electromagnetic reversing valve, the output oil circuit of the low-pressure pump is connected to the auxiliary pressure-building oil circuit, and the output oil circuit of the low-pressure pump is connected to the main oil circuit through the auxiliary pressure-building oil circuit.

Further, the oil inlet of the electronic pump is connected to the oil inlet of the low-pressure pump and the high-pressure pump and the oil return circuit, and the outlet side of the electronic pump is connected to the main oil circuit.

Further, the high-pressure pump and the low-pressure pump are connected in series through a coupling to form a main oil pump.

The utility model also provides a motor vehicle, which includes the above-mentioned hydraulic oil supply system of the dual-clutch automatic transmission.

Now the operating principle of the utility model is described in detail:

The hydraulic oil supply system of the dual-clutch automatic transmission of the present utility model includes a mechanical pump and an electronic pump. The mechanical pump is divided into a high-pressure mechanical pump (high-pressure pump) and a low-pressure mechanical pump (low-pressure pump). Drive, the electronic pump is connected with the power supply system and control unit in the motor vehicle. The oil supply system has a high-pressure circuit, which provides pressure to realize the coupling and separation of the clutch and realize gear shifting. The high-pressure circuit is normally operated by high-pressure Mechanical pump to supply; some working conditions are auxiliary supplied by low-pressure mechanical pump and electronic pump, and the rapid oil flushing and response speed of the whole system can be realized by increasing the flow rate; some working conditions are supplied by electronic pump alone, such as start-stop work In this case, the engine is turned off when the vehicle is coasting, and the pressure required by the system is provided when the mechanical pump stops working to realize the clutch engagement and separation and to achieve gear shifting, which will greatly reduce energy consumption. In addition, the hydraulic power of the utility model is proportional to the pressure and the flow rate. The patent mentioned in the background technology reduces the energy consumption by reducing the displacement of the pump. In order to achieve the same energy efficiency, the power of the drive motor must not be too large. It is realized by increasing the system pressure, so the pressure setting of the high-pressure circuit is much higher than the pressure of the conventional system, and the displacement setting of the high-pressure pump of the utility model is relatively larger, and in some working conditions, the auxiliary pressure building can be realized by the low-pressure pump , so the lower pressure setting of the high-pressure circuit can also achieve the same energy efficiency, so the requirements for sealing are relatively low, thereby reducing the manufacturing cost and difficulty of the entire transmission hydraulic system.

The low-pressure circuit is supplied separately by the low-pressure mechanical pump. The electromagnetic reversing valve arranged downstream of the low-pressure mechanical pump has three switching positions. The switching of the switching valve can make the oil supply of the oil pump more reasonable, realize the distribution according to the demand, and greatly reduce the energy consumption. consumption. The first switch position enables the supply of the low-pressure circuit by means of the low-pressure mechanical pump for lubrication and cooling of the shafting and the clutch; in the second switch position the low-pressure mechanical pump passes through the return The oil circuit is connected to the inlet of the mechanical pump to realize oil return, and the low-pressure pump unloads and returns oil to reduce energy consumption when lubrication is not required; and the low-pressure mechanical pump is connected to the auxiliary pressure-building oil circuit at the third switch position to realize auxiliary building pressure and provide large flow to improve the response speed of the system. Therefore, the utility model has little loss and energy efficiency in actual practice.

There are one-way valves on the outlet side of both the mechanical pump and the electronic pump. The one-way valve at the outlet of the mechanical pump will have certain pressure fluctuations in the mechanical pump when the operating speed of the drive motor of the hybrid vehicle is lower than the engine speed. Affects the entire system. The setting of the check valve can avoid the impact of fluctuations on the system. The check valve at the outlet of the mechanical pump can also prevent oil from flowing back into the mechanical pump when the electronic pump is running alone. The check valve on the outlet side of the electronic pump is to prevent When the mechanical pump is running, the oil flows back into the electronic pump when the electronic pump is not running.

Description of drawings

Fig. 1 is the structural schematic diagram of the utility model.

reference sign

Oil source 1; high pressure circuit 2; main oil circuit 21; high pressure pump 22; electronic pump 23; first output check valve 24; second output check valve 25; low pressure circuit 3; low pressure pump output oil circuit 31; low pressure pump 32; electromagnetic reversing valve 33; third output one-way valve 34; lubricating oil circuit 35; circuit oil circuit 4; auxiliary pressure building oil circuit 5; oil suction filter 6.

Detailed ways

Below in conjunction with embodiment and with reference to accompanying drawing, the utility model is further described.

With reference to Fig. 1, the utility model discloses a kind of dual-clutch automatic transmission hydraulic oil supply system, and it comprises oil source 1; , the high-pressure pump and the electronic pump are arranged in parallel on the main oil circuit 21; the low-pressure circuit 3, the low-pressure circuit includes a low-pressure pump output oil circuit 31, a low-pressure pump (low-pressure mechanical pump) 32, and an electromagnetic reversing valve 33. 32 and electromagnetic reversing valve 33 are arranged on the low-pressure pump output oil circuit, as shown in the drawings, the electromagnetic reversing valve 33 is arranged on the outlet side of the low-pressure pump; and the return oil circuit 4 .

By setting the high-pressure circuit 2 and the low-pressure circuit 3 separately, the hydraulic power of the hydraulic system can be allocated on demand, which greatly reduces the displacement of the mechanical pump while ensuring energy efficiency. Compared with the traditional oil supply system, the energy consumption is greatly reduced. consumption.

Specifically, as shown in FIG. 1, the low-pressure pump 32 and the high-pressure pump 22 are connected in series to form the main oil pump of the present invention, preferably connected by a coupling and using the same pump body, driven by a common drive unit, preferably The driving unit is an engine, and when used in a hybrid vehicle, the driving unit can also be a motor. The electromagnetic reversing valve has three switching positions, the three switching positions of the electromagnetic reversing valve can realize the following operations: the first switching position realizes the supply to the low-pressure circuit 3 by means of the low-pressure pump 32, the second switching position makes the low-pressure pump 32 is connected with the oil return oil circuit 4 to realize oil return, and an auxiliary pressure building oil circuit 5 is set between the low pressure pump and the high pressure circuit 2 at the third switch position so that the low pressure pump is connected to the high pressure circuit through the auxiliary pressure building oil circuit Thereby realizing auxiliary pressure build-up and providing large flow to improve the response speed of the system. In the utility model, the electronic pump 23 is used as an auxiliary oil pump, and is connected with the power supply system and the control unit (not shown in the drawings) in the motor vehicle so as to realize auxiliary pressure building under certain working conditions. In the shutdown condition and the coasting condition, when the engine stops running, the electronic pump operates to provide the pressure required by the system to realize clutch engagement and disengagement and to achieve gear shifting, which greatly reduces energy consumption.

The outlet sides of the high-pressure pump, the electronic pump and the low-pressure pump of the present utility model are respectively provided with a first output check valve 24′, a second output check valve and a third output check valve 34′. The one-way valve at the outlet of the high-pressure pump and the low-pressure pump is set for the working condition when the operating speed of the driving motor of the hybrid electric vehicle is lower than the engine speed. At this time, there will be certain pressure fluctuations in the mechanical pump, which may even affect the entire system. The setting of the valve can avoid the impact of fluctuations on the system, and the one-way valve at the outlet of the mechanical pump can also prevent oil from flowing back into the mechanical pump when the electronic pump is running alone. The setting of the one-way valve on the outlet side of the electronic pump is to prevent the oil from flowing back into the electronic pump when the electronic pump is not running when the mechanical pump is running.

The utility model also includes an oil suction filter 6 arranged between the oil source 1 and the inlet of the high-pressure pump, the low-pressure pump and the electronic pump, so as to ensure the cleanliness of the oil source entering the pump.

The electromagnetic reversing valve of the utility model is an on-off electromagnetic valve, specifically a three-position and four-way electromagnetic reversing valve. The electromagnetic reversing valve is connected with the valve body control unit (TCU, which is not shown in the drawings), and the logic switching is carried out by the instruction issued by the valve body control unit (TCU), and the oil supply of the oil pump is more reasonable through the switching of the switch valve. , to achieve on-demand distribution, greatly reducing energy consumption.

In the first switch position of the electromagnetic reversing valve 33, the low-pressure pump output oil circuit 31 is connected with the lubricating oil circuit 35, and at the same time, the joints between the electromagnetic reversing valve and the auxiliary pressure building oil circuit 5 and the circuit oil circuit 4 are closed; In the second switch position of the reversing valve 33, the output oil circuit 31 of the low-pressure pump is connected to the oil return circuit 4, and the oil return circuit is connected to the oil inlet of the low-pressure pump and the high-pressure pump, while the electromagnetic reversing valve is connected to the lubricating oil circuit. The joint of the auxiliary pressure building oil circuit is closed; in the third switch position, the output oil circuit of the low pressure pump is connected with the auxiliary pressure building oil circuit, and the output oil circuit of the low pressure pump is connected with the main oil circuit through the auxiliary pressure building oil circuit. The connection between the valve and the lubricating oil circuit and the return oil circuit is closed.

The oil inlet of the electronic pump 23 is connected with the oil inlets of the low-pressure pump and the high-pressure pump and the oil return circuit, and the outlet side of the electronic pump is connected with the main oil circuit, so that oil recycling can be realized.

The utility model also provides a motor vehicle comprising the hydraulic oil supply system of the dual-clutch automatic transmission mentioned above.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the content of the utility model description, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. A hydraulic oil supply system for a dual-clutch automatic transmission, comprising: oil source (1); A high-pressure circuit (2), the high-pressure circuit includes a main oil circuit (21), a high-pressure pump (22) and an electronic pump (23), and the high-pressure pump (22) is arranged in parallel with the electronic pump (23) on the main oil road; A low-pressure circuit (3), the low-pressure circuit comprising a low-pressure pump output oil circuit (31), a low-pressure pump (32) and an electromagnetic reversing valve (33) arranged on the low-pressure pump output oil circuit; and Circuit oil circuit (4); It is characterized in that: the low-pressure pump and the high-pressure pump are connected in series to form the main oil pump, and are connected with a common drive unit; the electromagnetic reversing valve has three switch positions, and the low-pressure pump (32) controls the low-pressure circuit (3) supply, the second switch position medium and low pressure pump (32) is connected to the oil return circuit (4), and the third switch position is provided with an auxiliary Build pressure oil circuit (5). 2. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 1, characterized in that: the outlet sides of the high-pressure pump, the electronic pump and the low-pressure pump are respectively provided with a first output check valve (24), a second The second output one-way valve (25) and the third output one-way valve (34). 3. The dual-clutch automatic transmission hydraulic oil supply system according to claim 1, characterized in that: it also includes an oil suction filter (6), and the oil suction filter is arranged between the oil source and the high-pressure pump and low-pressure pump And on the connecting pipe between the inlet of the electronic pump. 4. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 1, characterized in that: the electromagnetic reversing valve (33) is an on-off electromagnetic valve. 5. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 1, characterized in that: in the first switch position of the electromagnetic reversing valve (33), the output oil circuit (31) of the low-pressure pump is connected to Lubricating oil passage (35) is arranged. 6. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 5, characterized in that: in the second switch position of the electromagnetic reversing valve (33), the low-pressure pump output oil circuit (31) and the oil return oil circuit (4) connection, the oil return circuit is connected with the oil inlet of the low-pressure pump and the high-pressure pump. 7. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 6, characterized in that: in the third switch position of the electromagnetic reversing valve (33), the output oil circuit (31) of the low-pressure pump is connected to the auxiliary building The pressure oil circuit (5) is connected, and the output oil circuit of the low-pressure pump is connected with the main oil circuit of the high-pressure circuit through an auxiliary pressure-building oil circuit. 8. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 1, characterized in that: the oil inlet of the electronic pump (23) is connected with the oil inlet of the low-pressure pump (32) and the high-pressure pump (22) And the oil return oil circuit (4) is connected, and the outlet side of the electronic pump is connected with the main oil circuit. 9. The hydraulic oil supply system for dual-clutch automatic transmission according to claim 1, characterized in that: the high-pressure pump (22) and the low-pressure pump (32) are connected in series through a coupling to form a main oil pump. 10. A motor vehicle, characterized in that it comprises a hydraulic oil supply system for a dual-clutch automatic transmission according to any one of the preceding claims.