Hybrid power bus power series-parallel combination control safety backup device

Abstract

The utility model discloses a power series-parallel combined control safety backup device of a hybrid power bus, and belongs to the technical field of power series-parallel combined control. The system mainly comprises a logic control structure, the logic control structure is composed of two fuses, a driving motor clutch electromagnetic valve, a pressure switch, a standby driving motor clutch electromagnetic valve and a vehicle control unit, one fuse is connected with the vehicle control unit, and the other fuse is connected with the pressure switch. The driving motor clutch electromagnetic valve, the pressure switch and the standby driving motor clutch electromagnetic valve are all electrically connected with the other fuse and the whole vehicle controller, and the driving motor clutch electromagnetic valve, the pressure switch and the standby driving motor clutch electromagnetic valve are connected in parallel. According to the power series-parallel combined control safety backup device for the hybrid power bus, the effect of maintaining normal running of the bus is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of power series-parallel combined control, and more specifically, to a power series-parallel combined control safety backup device for a hybrid power passenger car. Background Art

[0002] Plug-in hybrid buses are an important component of new energy buses. Compared with traditional fuel vehicles, environmental protection and energy saving are its two major advantages. The "dual-motor dual-clutch hybrid system" is a type of hybrid power, mainly composed of engine + clutch + TM motor + clutch + ISG motor + controller and other components. The structural characteristics of this system can work in both series and parallel working modes. According to the different working modes of the vehicle (flat road start, slope start, low and medium speed, high speed, brake energy recovery, parking power generation, etc.), the vehicle control system controls the clutch engagement and separation to achieve combined control of the power output of the engine, TM motor, and ISG motor, stabilize the engine speed, adjust the power output form of the vehicle power system, and achieve decoupling of the engine working point from the road conditions, ensuring that the engine works near the high-efficiency zone. The dual-motor dual-clutch hybrid solution combines the advantages of pure electric, extended-range, ordinary hybrid, and plug-in hybrid, with good power, economy, and comfort.

[0003] At present, the power output control mode of the "dual-motor dual-clutch hybrid system" is as follows: the vehicle control unit (VCU) issues instructions according to the vehicle driving conditions, controls the on and off of the single solenoid valve to control the inlet and outlet of the compressed air at the clutch sub-pump end and the movement of the piston push rod, and controls the engagement and disengagement of the clutch, thereby realizing different power output modes (low-speed single TM motor pure electric mode, high-speed single ISG motor pure electric mode, dual-motor pure electric mode, series hybrid mode, parallel hybrid mode, low-speed single motor recovery mode, high-speed single motor recovery mode, dual-motor recovery mode). Because the clutch between the engine and TM motor and the TM motor and the ISG motor in this hybrid system needs to be frequently separated and engaged according to the instructions of the vehicle control unit (VCU) (the clutch control solenoid valve between the TM motor and the ISG motor has a higher operating frequency), coupled with insufficient cleaning and maintenance of the air path and differences in the quality of the solenoid valve itself, the solenoid valve often fails, causing the vehicle to break down and affect the normal use of the customer's vehicle.

[0004] Therefore, it is necessary to provide a hybrid bus power parallel-parallel combined control safety backup device to solve the above problems. Utility Model Content

[0005] Based on the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide a hybrid bus power hybrid combined control safety backup device to achieve the effect of maintaining normal driving of the vehicle.

[0006] The technical solution adopted by the present application to solve its technical problems is: a hybrid bus power hybrid control safety backup device, including a logic control structure, which is composed of a fuse, a drive motor clutch solenoid valve, a pressure switch, a spare drive motor clutch solenoid valve and a vehicle controller. Two fuses are provided, one of which is connected to the vehicle controller, and the drive motor clutch solenoid valve, the pressure switch and the spare drive motor clutch solenoid valve are all electrically connected to the other fuse and the vehicle controller, and the drive motor clutch solenoid valve, the pressure switch and the spare drive motor clutch solenoid valve are connected in parallel.

[0007] Furthermore, it also includes a control air pipeline structure, the control air pipeline structure includes an air storage cylinder, the air storage cylinder is connected to a compressed air filter, the compressed air filter is connected to two drive motor clutch solenoid valves, one of the drive motor clutch solenoid valves is connected to an exhaust port muffler and an engine and ISG motor clutch separation cylinder, and one of the pressure switches is arranged between the drive motor clutch solenoid valve and the engine and ISG motor clutch separation cylinder;

[0008] Another of the drive motor clutch solenoid valves is connected to the TM motor and ISG motor clutch and separation cylinder, another of the pressure switches is arranged between the drive motor clutch solenoid valve and the TM motor and ISG motor clutch and separation cylinder, and the backup drive motor clutch solenoid valve is connected in parallel with the drive motor clutch solenoid valve.

[0009] Furthermore, the two drive motor clutch solenoid valves are both two-position three-way.

[0010] Furthermore, the gas storage cylinder is connected to an overall gas source.

[0011] Furthermore, the fuses are all electrically connected to a power source.

[0012] Furthermore, the vehicle controller is grounded.

[0013] Furthermore, the pipe diameter in the control air pipe structure is not less than 9 mm and the pressure resistance is greater than 1.5 MPa.

[0014] The beneficial effects of the utility model are:

[0015] When the drive motor clutch solenoid valve works normally, the standby drive motor clutch solenoid valve does not work. If the drive motor clutch solenoid valve fails, the standby drive motor clutch solenoid valve receives the working signal, replaces the drive motor clutch solenoid valve, connects the air pipeline, and works. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the logical control structure of the vehicle controller (VCU) in this application;

[0018] Figure 2 This is a schematic diagram of the control air pipeline structure in this application;

[0019] In the figure:

[0020] 1. Logic control structure; 11. Fuse; 12. Drive motor clutch solenoid valve; 13. Pressure switch; 14. Spare drive motor clutch solenoid valve; 15. Vehicle controller

[0021] 2. Control air pipeline structure; 21. Air storage cylinder; 22. Compressed air filter; 23. Exhaust port muffler; 24. Engine and ISG motor clutch and separation cylinder; 25. TM motor and ISG motor clutch and separation cylinder. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0024] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0025] At present, the power output control mode of the "dual-motor dual-clutch hybrid system" is as follows: the vehicle control unit (VCU) issues instructions according to the vehicle driving conditions, controls the on and off of the single solenoid valve to control the inlet and outlet of the compressed air at the clutch sub-pump end and the movement of the piston push rod, and controls the engagement and disengagement of the clutch, thereby realizing different power output modes (low-speed single TM motor pure electric mode, high-speed single ISG motor pure electric mode, dual-motor pure electric mode, series hybrid mode, parallel hybrid mode, low-speed single motor recovery mode, high-speed single motor recovery mode, dual-motor recovery mode). Because the clutch between the engine and TM motor and the TM motor and the ISG motor in this hybrid system needs to be frequently separated and engaged according to the instructions of the vehicle control unit (VCU) (the clutch control solenoid valve between the TM motor and the ISG motor has a higher operating frequency), coupled with insufficient cleaning and maintenance of the air path and differences in the quality of the solenoid valve itself, the solenoid valve often fails, causing the vehicle to break down and affect the normal use of the customer's vehicle.

[0026] Solenoid valve failure can lead to the following consequences:

[0027] 1. When the vehicle is started from the parking state, if the solenoid valve fails and the two clutches cannot be separated, the power transmission chain (engine to axle) is in a fully connected state, resulting in the low-speed single TM motor pure electric mode cannot start the vehicle, and the vehicle cannot be driven;

[0028] 2. When the vehicle speed is below 30km / h (a certain designed energy-saving speed) and the power battery is low, if the clutch control solenoid valve fails, the vehicle will automatically shut down because the clutch between the TM motor and the ISG motor cannot be separated;

[0029] 3. When the vehicle is driving at a high speed of more than 30km / h (a certain designed energy-saving speed), if the clutch control solenoid valve fails, the vehicle can drive normally. If the vehicle slows down to below 30km / h, it will automatically shut down.

[0030] like Figure 1-2 As shown, the present application provides a hybrid bus power parallel-parallel combined control safety backup device, including a logic control structure 1 and a control air pipeline structure 2.

[0031] The logic control structure 1 is composed of a fuse 11, a drive motor clutch solenoid valve 12, a pressure switch 13 (pipeline pressure signal monitoring), a backup drive motor clutch solenoid valve 14 and a vehicle controller 15 (VCU).

[0032] Two fuses 11 are provided, and both fuses 11 are electrically connected to the power supply. One of the fuses 11 is connected to the vehicle controller 15. The drive motor clutch solenoid valve 12, the pressure switch 13 and the spare drive motor clutch solenoid valve 14 are all electrically connected to the other fuse 11 and the vehicle controller 15, and the drive motor clutch solenoid valve 12, the pressure switch 13 and the spare drive motor clutch solenoid valve 14 are connected in parallel. At the same time, the vehicle controller 15 is grounded.

[0033] The control air pipeline structure 2 includes an air storage cylinder 21, which is connected to an integral air source and a compressed air filter 22. The compressed air filter 22 is connected to two drive motor clutch solenoid valves 12, and both drive motor clutch solenoid valves 12 are two-position three-way.

[0034] One of the drive motor clutch solenoid valves 12 is connected to an exhaust port muffler 23 and an engine and ISG motor clutch separation cylinder 24. A pressure switch 13 is arranged between the drive motor clutch solenoid valve 12 and the engine and ISG motor clutch separation cylinder 24.

[0035] Another drive motor clutch solenoid valve 12 is connected to the TM motor and ISG motor clutch separation cylinder 24. Another pressure switch 13 is arranged between the drive motor clutch solenoid valve 12 and the TM motor and ISG motor clutch separation cylinder 24. The spare drive motor clutch solenoid valve 14 is connected in parallel with the drive motor clutch solenoid valve 12.

[0036] The pipe diameter in the control air pipe structure 2 is not less than 9mm and the pressure resistance is greater than 1.5Mpa.

[0037] When the vehicle controller 15 sends a working signal to the drive motor clutch solenoid valve 12, under normal circumstances, the drive motor clutch solenoid valve 12 starts to work, the control air pipeline structure 2 is ventilated, and the pressure switch 13 is turned on to send a working signal to the vehicle controller 15, and the vehicle controller 15 determines that the system is working normally;

[0038] When the drive motor clutch solenoid valve 15 fails, the control air pipeline structure 2 is not ventilated, the pressure switch 13 is not connected, and no working signal is sent to the vehicle controller 15. The vehicle controller 15 determines that the system is not working properly and sends a working signal to the standby drive motor clutch solenoid valve 14 to take over the work.

[0039] When the drive motor clutch solenoid valve 12 works normally, the standby drive motor clutch solenoid valve 14 does not participate in the work. If the drive motor clutch solenoid valve 12 fails, the standby drive motor clutch solenoid valve 14 receives the working signal, replaces the drive motor clutch solenoid valve 12, connects the air pipeline, and participates in the work.

[0040] Specific working mode performance of the vehicle:

[0041] (1) When the vehicle is stationary in READY mode, if the drive motor solenoid valve fails, the instrument will report a clutch disengagement failure, and the standby drive motor clutch solenoid valve will be activated at the same time, and the vehicle will return to normal and enter the ready-to-drive state;

[0042] (2) When the vehicle is driving at a low speed (below 30 km / h, not in parallel, pure electric drive), the instrument reports a clutch separation failure if the drive motor solenoid valve fails, and the backup drive motor clutch solenoid valve is activated at the same time. The vehicle will feel a certain jerk during the conversion process, and then the vehicle will resume normal driving;

[0043] (3) When the vehicle is traveling at high speed (above 30 km / h, parallel drive), the instrument does not report a clutch separation fault if the drive motor solenoid valve fails. When the vehicle decelerates to below 30 km / h, the instrument reports a clutch separation fault and the vehicle body feels a slight jerk. At the same time, the backup drive motor clutch solenoid valve is activated and the vehicle resumes normal driving.

[0044] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0047] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0048] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hybrid bus power parallel-parallel combined control safety backup device, characterized in that: The invention comprises a logic control structure (1), wherein the logic control structure (1) is composed of a fuse (11), a drive motor clutch solenoid valve (12), a pressure switch (13), a spare drive motor clutch solenoid valve (14) and a vehicle controller (15), wherein two fuses (11) are provided, one of which is connected to the vehicle controller (15), and the drive motor clutch solenoid valve (12), the pressure switch (13) and the spare drive motor clutch solenoid valve (14) are all electrically connected to the other fuse (11) and the vehicle controller (15), and the drive motor clutch solenoid valve (12), the pressure switch (13) and the spare drive motor clutch solenoid valve (14) are connected in parallel.

2. A hybrid bus power parallel-parallel combined control safety backup device according to claim 1, characterized in that: The control air pipeline structure (2) further comprises an air storage cylinder (21), the air storage cylinder (21) being connected to a compressed air filter (22), the compressed air filter (22) being connected to two drive motor clutch solenoid valves (12), one of the drive motor clutch solenoid valves (12) being connected to an exhaust port muffler (23) and an engine and ISG motor clutch separation cylinder (24), and one of the pressure switches (13) being arranged between the drive motor clutch solenoid valve (12) and the engine and ISG motor clutch separation cylinder (24); Another of the drive motor clutch solenoid valves (12) is connected to a TM motor and ISG motor clutch separation cylinder (24), another of the pressure switches (13) is arranged between the drive motor clutch solenoid valve (12) and the TM motor and ISG motor clutch separation cylinder (24), and the backup drive motor clutch solenoid valve (14) is connected in parallel with the drive motor clutch solenoid valve (12).

3. A hybrid bus power parallel-parallel combined control safety backup device according to claim 2, characterized in that: The two drive motor clutch solenoid valves (12) are both two-position three-way.

4. A hybrid bus power parallel-parallel combined control safety backup device according to claim 2, characterized in that: The gas storage cylinder (21) is connected to an overall gas source.

5. A hybrid bus power parallel-parallel combined control safety backup device according to claim 1, characterized in that: The fuses (11) are all electrically connected to a power source.

6. A hybrid bus power parallel-parallel combined control safety backup device according to claim 1, characterized in that: The vehicle controller (15) is grounded.

7. A hybrid bus power parallel-parallel combined control safety backup device according to claim 2, characterized in that: The pipe diameter in the control air pipe structure (2) is not less than 9 mm and the pressure resistance is greater than 1.5 MPa.

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