Two-oil-way hydraulic torque converter control oil way for automatic transmission

Abstract

The utility model discloses a two-oil-way hydraulic torque converter control oil way for an automatic transmission, and belongs to the technical field of transmission oil ways. The main pressure source is communicated with the main pressure regulating valve, the main pressure regulating valve is communicated with the TC regulating valve, the TC regulating valve is communicated with the TC control valve, and the TC control valve is communicated with the hydraulic torque converter, the lock-up clutch valve and the cooler; the main oil pressure electromagnetic valve is communicated with the acting surface of the main pressure regulating valve and the acting surface of the TC regulating valve; the SLU electromagnetic valve is communicated with the acting surface of the lock-up clutch valve and the acting surface of the TC control valve; a secondary pressure source is in communication with the lockup clutch valve. The oil drainage hole of the lock-up clutch valve is closed under the hydraulic working condition and communicated with an oil drainage way of the lock-up clutch valve under the locking working condition, the oil drainage pressure regulating function is achieved, and oil way decoupling control is achieved. Before the TC pressure hydraulic power is reversed, the side pressure of the hydraulic oil way and the locking oil way is in smooth transition, the rotating speed of the turbine is not jittered during sliding unlocking separation, and the gear shifting feeling is good.

Description

Technical Field

[0001] The utility model relates to a two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission, belonging to the technical field of transmission oil circuits. Background Art

[0002] In an automatic transmission, the torque converter uses the characteristics of fluid to achieve the hydraulic torque conversion function, and controls it through oil pressure to achieve the purpose of speed change and torque increase. The core components of the torque converter include the pump wheel and the turbine, and the power is transmitted between the two through the fluid. In order to achieve more flexible transmission control, a controllable clutch is usually installed between the pump wheel and the turbine. When the driving condition of the car reaches the set target, the clutch can lock the pump wheel and the turbine into one, forming a locked state, and realize direct mechanical transmission; under other conditions, the pump wheel and the turbine achieve speed change and torque increase through hydraulic transmission.

[0003] In the control system of the torque converter, the design of the control oil circuit directly affects the overall performance of the automatic transmission. In particular, the lock-up side oil circuit of the torque converter is connected to the oil outlet of the lock-up clutch valve and the oil circuit of the TC control valve. This design is designed to be compatible with the sufficiency of the flow under hydraulic conditions and the pressure regulation and oil drain requirements of the lock-up clutch valve under lock-up conditions.

[0004] To achieve the above functions, a 0.8mm small hole and a one-way valve are set at the oil drain hole of the lockup clutch valve. This design not only ensures sufficient flow under hydraulic conditions, but also meets the pressure regulation and oil drain requirements of the lockup clutch valve under lockup conditions. However, although the current oil circuit control system can realize the switching control of the automatic transmission hydraulic conditions and lockup conditions, under some low-torque sliding unlocking conditions, unlocking shock may occur due to the small pressure difference between the lockup side pressure and the separation side pressure during rapid switching.

[0005] Unlocking shock not only affects driving comfort, but may also have an adverse effect on the service life of the transmission. Therefore, it is necessary to further optimize and improve the existing torque converter control oil circuit to reduce or eliminate the unlocking shock phenomenon and improve the overall performance of the automatic transmission. Utility Model Content

[0006] In order to solve the problems existing in the background technology, the utility model provides a two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission, including a main pressure oil circuit, a TC oil supply circuit, a secondary pressure oil supply circuit, a cooling oil circuit, a main oil pressure solenoid valve control oil circuit, a TC regulating oil circuit, a cooling oil circuit, a locking clutch valve output pressure oil circuit, a separation side pressure oil circuit, a locking pressure oil circuit, an SLU solenoid valve control oil circuit, a main pressure source, a main oil pressure solenoid valve, an SLU solenoid valve, a secondary pressure source, a locking clutch valve, a TC control valve, a cooler, a TC regulating valve and a main pressure regulating valve;

[0008] The main pressure source is connected to the main pressure regulating valve through the main pressure oil circuit, the main pressure regulating valve is connected to the TC regulating valve through the TC oil supply circuit, the TC regulating valve is connected to the TC control valve through the TC regulating oil circuit, the TC control valve is connected to the torque converter through the separation side pressure oil circuit and the locking pressure oil circuit, the TC control valve is connected to the locking clutch valve through the locking clutch valve output pressure oil circuit and the separation side pressure oil circuit, and the TC control valve is connected to the cooler through the cooling oil circuit and the cooling oil circuit;

[0009] The main oil pressure solenoid valve is connected to the working surface of the main pressure regulating valve and the working surface of the TC regulating valve through the main oil pressure solenoid valve control oil circuit;

[0010] The SLU solenoid valve is connected to the working surface of the lockup clutch valve and the working surface of the TC control valve through the SLU solenoid valve control oil circuit;

[0011] The secondary pressure source is connected to the lockup clutch valve via a secondary pressure oil supply path.

[0012] A one-way valve is provided on the TC regulating oil circuit.

[0013] The main pressure regulating valve is connected to the oil drain circuit.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model decouples the lockup clutch valve oil leakage circuit and the lockup pressure circuit respectively through the TC control valve, that is, by controlling the TC control valve, the lockup clutch valve oil leakage hole is closed under the hydraulic condition, and is connected with the lockup clutch valve oil leakage circuit under the lockup condition, so as to realize the oil leakage pressure regulation function; the lockup pressure circuit is the TC return circuit under the hydraulic condition, and becomes the lockup side circuit under the lockup condition, so as to realize the oil circuit decoupling control. By controlling the oil circuit decoupling design, before the TC pressure hydraulic reversal, the pressure of the hydraulic oil circuit and the lockup oil circuit side is smoothly transferred, the turbine speed does not shake when the sliding unlocking separation occurs, and the shifting feeling is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0017] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] The torque converter is the core component of the AT transmission, and its main function is to reduce shock and increase torque. To ensure the efficiency of the automatic transmission, it is necessary to switch the torque converter between the hydraulic operating condition and the locking operating condition according to the actual operating conditions. The two-oil circuit torque converter is divided into a hydraulic oil circuit and a locking oil circuit.

[0019] A two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission, comprising a main pressure oil circuit 1, a TC oil supply circuit 3, a secondary pressure oil supply circuit 4, a cooling oil circuit 5, a main oil pressure solenoid valve control oil circuit 6, a TC regulating oil circuit 7, a cooling oil circuit 8, a locking clutch valve output pressure oil circuit 9, a separation side pressure oil circuit 10, a locking pressure oil circuit 11, an SLU solenoid valve control oil circuit 12, a main pressure source 13, a main oil pressure solenoid valve 14, an SLU solenoid valve 15, a secondary pressure source 16, a locking clutch valve 17, a TC control valve 19, a cooler 21, a TC regulating valve 22 and a main pressure regulating valve 23;

[0020] The main pressure source 13 is supplied by an oil pump, the main pressure source 13 is connected to the main pressure regulating valve 23 through the main pressure oil circuit 1, the main pressure regulating valve 23 is connected to the TC regulating valve 22 through the TC oil supply circuit 3, the TC regulating valve 22 is connected to the TC control valve 19 through the TC regulating oil circuit 7, the TC control valve 19 is connected to the torque converter 18 through the separation side pressure oil circuit (16r pressure oil circuit) 10 and the locking pressure oil circuit (1613 pressure oil circuit) 11, the TC control valve 19 is connected to the lockup clutch valve 17 through the locking clutch valve output pressure oil circuit 9 and the separation side pressure oil circuit (16r pressure oil circuit) 10, and the TC control valve 19 is connected to the cooler 21 through the cooling oil circuit 8 and the cooling oil circuit 5;

[0021] By controlling the current of the main oil pressure solenoid valve 14, different linear pressures are output. The main oil pressure solenoid valve 14 is connected with the working surface of the main pressure regulating valve 23 and the working surface of the TC regulating valve 22 through the main oil pressure solenoid valve control oil circuit 6. The main pressure regulating valve 23 adjusts the stable oil pressure as the system main pressure; the TC regulating valve 22 adjusts the input pressure to the torque converter 18 as the stable pressure input of the TC control through the action of the main oil pressure solenoid valve 14 control pressure.

[0022] The TCU controls the SLU solenoid valve 15 according to the working conditions required by the vehicle. The SLU solenoid valve 15 outputs a linear pressure according to the control current signal. The SLU solenoid valve 15 is connected to the working surface of the lockup clutch valve 17 and the working surface of the TC control valve 19 through the SLU solenoid valve control oil circuit 12. The output pressure of the SLU solenoid valve 15 switches the lockup clutch valve 17 and the TC control valve 19 to adjust the oil circuit direction and pressure.

[0023] The TC control valve 19 is a two-position six-way valve. The output linear pressure is controlled by the SLU solenoid valve 15 to act on the working surface of the TC control valve 19. The TC control valve 19 switches to realize the oil flow direction switching between the hydraulic working condition and the locking working condition.

[0024] The secondary pressure source 16 is connected to the lock-up clutch valve 17 via the secondary pressure oil supply passage 4 .

[0025] The TC regulating oil circuit 7 is provided with a one-way valve 20 .

[0026] The main pressure regulating valve 23 is connected to the oil drain circuit 2 .

[0027] The utility model discloses a working method for controlling the hydraulic working condition of the oil circuits by using a two-oil circuit hydraulic torque converter for an automatic transmission, the method comprising the following steps:

[0028] S1: The SLU solenoid valve 15 is in the power-off state, and the lock-up clutch valve 17 does not operate;

[0029] S2: The main pressure source 13 provides hydraulic oil, and the hydraulic oil enters the main pressure regulating valve 23 through the main pressure oil circuit 1;

[0030] S3: Hydraulic oil from the autonomous pressure regulating valve 23 enters the TC regulating valve 22 through the TC oil supply line 3;

[0031] S4: The hydraulic oil enters the TC control valve 19 from the TC regulating valve 22 through the TC regulating oil circuit 7;

[0032] S5: The hydraulic oil flows from the TC control valve 19 through the release side pressure oil circuit 10 and enters the lock-up clutch valve 17 and the torque converter 18 at the same time;

[0033] S6: One path of hydraulic oil returns from the torque converter 18 to the TC control valve 19 through the locking pressure oil path 11. The hydraulic oil passes through the cooling oil path 8 and the cooling oil path 5 from the TC control valve 19 and enters the cooler 21;

[0034] At the same time, another hydraulic oil returns to the TC control valve 19 from the locking clutch valve 17 through the locking clutch valve output pressure oil circuit 9. Under hydraulic working conditions, the locking clutch valve output pressure oil circuit 9 is not connected to other oil circuits after passing through the TC control valve 19.

[0035] The utility model discloses a working method for controlling an oil circuit locking condition of a two-oil circuit hydraulic torque converter for an automatic transmission, the method comprising the following steps:

[0036] S1: The SLU solenoid valve 15 is in the energized state, so that there is oil pressure in the SLU solenoid valve control oil circuit 12 acting on the working surface of the TC control valve 19 and the working surface of the lockup clutch valve 17;

[0037] S2: TC control valve 19 and lock-up clutch valve 17 are switched;

[0038] S3: The main pressure source 13 provides main pressure hydraulic oil, and the main pressure hydraulic oil enters the main pressure regulating valve 23 through the main pressure oil circuit 1;

[0039] S4: The main pressure hydraulic oil flows from the self-pressure regulating valve 23 to the TC regulating valve 22 through the TC oil supply line 3;

[0040] S5: The main pressure hydraulic oil enters the TC control valve 19 from the TC regulating valve 22 through the TC regulating oil circuit 7;

[0041] S6: The main pressure hydraulic oil passes through the cooling oil circuit 8 and the cooling oil circuit 5 from the TC control valve 19 and enters the cooler 21;

[0042] S7: The secondary pressure source 16 provides secondary pressure hydraulic oil, which enters the locking clutch valve 17 through the secondary pressure oil supply line 4; the secondary pressure source 16 supplies pressure to the locking clutch valve 17;

[0043] S8: The secondary pressure hydraulic oil enters the TC control valve 19 from the locking clutch valve 17 through the locking clutch valve output pressure oil circuit 9;

[0044] S9: The secondary pressure hydraulic oil flows from the TC control valve 19 through the locking pressure oil circuit 11 to the locking chamber of the torque converter 18. Under the action of the locking pressure of the locking pressure oil circuit 11, the torque converter 18 locks the turbine and pump wheel of the torque converter 18 to form a direct connection, thereby realizing the locking control of the torque converter.

[0045] The locking clutch valve 17 is a two-position three-way pressure valve. The current of the SLU solenoid valve 15 controls the output pressure of the SLU solenoid valve control oil circuit 12, which acts on the action surface of the locking clutch valve 17. The valve core moves to connect the secondary pressure supply oil circuit 4 with the locking clutch valve output pressure oil circuit 9. The output pressure end surface of the locking clutch valve 17 is designed with a surface difference. Since the output pressure of the locking clutch valve 17 is equal to the surface difference pressure and the spring force, according to this principle, the locking clutch valve 17 outputs a stable controllable pressure, and according to the required working torque of the whole machine, the precise control of the torque converter locking is realized;

[0046] S10: The hydraulic oil of the torque converter 18 enters the oil drain hole of the TC control valve 19 through the separation side pressure oil circuit 10.

[0047] The oil drain end of the lockup clutch valve 17 is converted into oil drain through the TC control valve 19, and the lockup pressure oil circuit 11 is connected to the separation side pressure oil circuit 10. The lockup clutch valve output pressure oil circuit 9 does not directly lock the pressure oil circuit 11, but is connected to the lockup pressure oil circuit 11 after being decoupled by the TC control valve 19, that is, the lockup pressure oil circuit 11 and the oil drain circuit of the lockup clutch valve 17 are both decoupled through the TC control valve 19.

[0048] After the oil outlet pressure of the lockup clutch valve 17 is connected with the TC control valve 19, the oil circuit is connected with the locking pressure oil circuit 11 through the TC control valve 19. Under hydraulic conditions, the TC control valve 19 disconnects the oil outlet pressure of the lockup clutch valve 17 from the pressure of the locking pressure oil circuit 11, and cancels the 0.8mm small hole and the one-way valve at the position of the lockup clutch valve oil drain hole. The oil drain oil circuit is connected with the TC control valve 19. Through the oil circuit design, the lockup clutch valve 17 oil drain oil circuit and the locking pressure oil circuit 11 are decoupled through the TC control valve 19 respectively, that is, by controlling the TC control valve 19, the lockup clutch valve oil drain hole is closed under hydraulic conditions, and is connected with the oil drain under locking conditions, thereby realizing the oil drain pressure regulating function; the locking pressure oil circuit 11 is the TC return oil circuit under hydraulic conditions, and becomes the locking side oil circuit under locking conditions, thereby realizing oil circuit decoupling control.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent conditions of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission, characterized in that: It comprises a main pressure oil circuit (1), a TC oil supply circuit (3), a secondary pressure oil supply circuit (4), a cooling oil circuit (5), a main oil pressure solenoid valve control oil circuit (6), a TC regulating oil circuit (7), a cooling oil circuit (8), a locking clutch valve output pressure oil circuit (9), a separation side pressure oil circuit (10), a locking pressure oil circuit (11), an SLU solenoid valve control oil circuit (12), a main pressure source (13), a main oil pressure solenoid valve (14), an SLU solenoid valve (15), a secondary pressure source (16), a locking clutch valve (17), a TC control valve (19), a cooler (21), a TC regulating valve (22) and a main pressure regulating valve (23); The main pressure source (13) is connected to the main pressure regulating valve (23) through the main pressure oil circuit (1), the main pressure regulating valve (23) is connected to the TC regulating valve (22) through the TC oil supply circuit (3), the TC regulating valve (22) is connected to the TC control valve (19) through the TC regulating oil circuit (7), the TC control valve (19) is connected to the torque converter (18) through the separation side pressure oil circuit (10) and the locking pressure oil circuit (11), the TC control valve (19) is connected to the lockup clutch valve (17) through the locking clutch valve output pressure oil circuit (9) and the separation side pressure oil circuit (10), and the TC control valve (19) is connected to the cooler (21) through the cooling oil circuit (8) and the cooling oil circuit (5); The main oil pressure solenoid valve (14) is connected to the working surface of the main pressure regulating valve (23) and the working surface of the TC regulating valve (22) through the main oil pressure solenoid valve control oil circuit (6); The SLU solenoid valve (15) is connected to the working surface of the lockup clutch valve (17) and the working surface of the TC control valve (19) through the SLU solenoid valve control oil circuit (12); The secondary pressure source (16) is connected to the lockup clutch valve (17) via the secondary pressure oil supply line (4).

2. The two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission according to claim 1, characterized in that: The TC regulating oil circuit (7) is provided with a one-way valve (20).

3. The two-oil-circuit hydraulic torque converter control oil circuit for an automatic transmission according to claim 1, characterized in that: The main pressure regulating valve (23) is connected to the oil drain circuit (2).

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