Multi-mode switching hybrid electromechanical coupling system and vehicle

Abstract

The present disclosure provides a hybrid electromechanical coupling system and vehicle with multi-mode switching, including an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group and a system output shaft; the engine and the generator are both coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism; the drive motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft; each brake in the brake group is arranged on the first transmission mechanism and / or the second transmission mechanism, so that the system can achieve multi-mode switching by changing the braking state of each brake, thereby meeting the requirements of different urban working conditions and different vehicle models, and can cover HEV models and PHEV models, with good platformization.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of vehicle power systems, and in particular relates to a multi-mode switching hybrid electromechanical coupling system and a vehicle. Background Art

[0002] Traditionally, the power system includes an engine (internal combustion engine) and a transmission system consisting of a transmission, a differential and a drive shaft. Its function is to provide the vehicle with the driving power required by the driving wheels.

[0003] However, the above power system has a relatively single driving mode and cannot meet the requirements of different working conditions and different vehicle models. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and to provide a hybrid electromechanical coupling system and a vehicle with multi-mode switching.

[0005] In one aspect of the present disclosure, a multi-mode switching hybrid electromechanical coupling system is provided, wherein the hybrid electromechanical coupling system includes an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group, and a system output shaft;

[0006] The engine and the generator are both coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism;

[0007] The driving motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft;

[0008] Each brake in the brake group is arranged on the first transmission mechanism and / or the second transmission mechanism, so that the system can achieve multi-mode switching by changing the braking state of each brake.

[0009] In some embodiments, the first transmission mechanism adopts a first planetary gear mechanism, and the first planetary gear mechanism includes a first sun gear, a first planet carrier and a first ring gear;

[0010] The first sun gear is connected to the output shaft of the generator, the first planet carrier is coupled to the first sun gear and the first ring gear respectively, the first planet carrier is also fixedly connected to the second transmission mechanism, and the first ring gear is connected to the output shaft of the engine.

[0011] In some embodiments, the brake group includes a first brake disposed on the first sun gear.

[0012] In some embodiments, the second transmission mechanism adopts a second planetary gear mechanism, and the second planetary gear mechanism includes a second sun gear, a second planet carrier and a second ring gear;

[0013] The second sun gear is connected to the output shaft of the drive motor, the second planet carrier is coupled to the second sun gear and the second ring gear respectively, the second planet carrier is also fixedly connected to the first planet carrier, and the second ring gear is fixedly connected to the system output shaft.

[0014] In some embodiments, the brake group further includes a second brake disposed on the first planet carrier and the second planet carrier.

[0015] In some embodiments, the brake group further includes a third brake disposed on the second sun gear.

[0016] In some embodiments, the drive motor and the generator are arranged side by side.

[0017] In some embodiments, during the multi-mode switching process, the drive motor participates in driving; and / or,

[0018] In the braking mode, the drive motor generates a drive torque and generates an induced current in the winding to charge the power battery.

[0019] In some embodiments, the braking state of the brake is changed according to the magnitude relationship between the power battery SOC value and a preset first threshold value, so that the system can achieve multi-mode switching; and / or,

[0020] According to the magnitude relationship between the vehicle speed value driven by the system and a preset second threshold value, the braking state of the brake is changed so that the system can achieve multi-mode switching.

[0021] Another aspect of the present disclosure provides a vehicle, wherein the vehicle includes the hybrid electromechanical coupling system described above.

[0022] The hybrid electromechanical coupling system and vehicle disclosed in the present invention include an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group and a system output shaft; the engine and the generator are coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism; the drive motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft, and the system output shaft is used to couple with the drive wheel; the brake in the brake group is arranged on the first transmission mechanism and / or the second transmission mechanism. In this way, the system can realize multi-mode switching by changing the braking state of the brake, so as to meet the requirements of different urban working conditions and different vehicle models, and can cover HEV models and PHEV models, with good platformization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a hybrid electromechanical coupling system according to an embodiment of the present disclosure;

[0024] Figures 2 to 6 This is a schematic diagram of a hybrid electromechanical coupling system according to another embodiment of the present disclosure operating in different modes. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, a multi-mode switching hybrid electromechanical coupling system 100 includes an engine 110, a drive motor 120, a generator 130, a first transmission mechanism 140, a second transmission mechanism 150, a brake group and a system output shaft 160.

[0027] For example, Figure 1 As shown, the engine 110 and the generator 130 are coupled to the first transmission mechanism 140, and the first transmission mechanism 140 is fixedly connected to the second transmission mechanism 150. The drive motor 120 is coupled to the second transmission mechanism 150, and the second transmission mechanism 150 is fixedly connected to the system output shaft 160, and the system output shaft 160 is used to couple with the driving wheel of the vehicle (not shown in the figure). Each brake in the brake group is arranged on the first transmission mechanism 140 and / or the second transmission mechanism 150. In this way, the system can achieve multi-mode switching by changing the braking state of each brake.

[0028] Exemplarily, the multi-mode mentioned above means that, according to the engagement state of the brakes in the brake group, the hybrid electromechanical coupling system can operate in engine direct drive mode, parallel hybrid mode, series hybrid mode, pure electric mode and brake recovery mode, etc. The switching between the various modes will be explained in detail below and will not be elaborated here.

[0029] The hybrid electromechanical coupling system of this embodiment includes an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group and a system output shaft; the engine and the generator are coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism; the drive motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft, and the system output shaft is used to couple with the drive wheel; the brake in the brake group is set on the first transmission mechanism and / or the second transmission mechanism. In this way, the system can achieve multi-mode switching by changing the braking state of the brake, so as to meet the requirements of different urban working conditions and different vehicle models, and can cover HEV models and PHEV models, with good platformization.

[0030] For example, Figure 1 As shown, the first transmission mechanism 140 adopts a first planetary gear mechanism, which includes a first sun gear 141, a first planet carrier 142 and a first ring gear 143. The second transmission mechanism 150 adopts a second planetary gear mechanism, which includes a second sun gear 151, a second planet carrier 152 and a second ring gear 153.

[0031] Specifically, Figure 1 As shown, the first sun gear 141 is connected to the output shaft of the generator 130, the first planet carrier 142 is coupled to the first sun gear 141 and the first ring gear 143 respectively, and the first ring gear is connected to the output shaft of the engine 110. The second sun gear 151 is connected to the output shaft of the drive motor 120, the second planet carrier 152 is coupled to the second sun gear 151 and the second ring gear 153 respectively, the second planet carrier 152 is also fixedly connected to the first planet carrier 142, and the second ring gear 153 is fixedly connected to the system output shaft 160.

[0032] In the hybrid electromechanical coupling system of this embodiment, the generator can increase speed and reduce torque through the first planetary gear transmission mechanism, thereby effectively reducing the size of the generator.

[0033] For example, Figure 1As shown, the brake group includes a first brake B1, a second brake B2 and a third brake B3. The first brake B1 is arranged on the first sun gear 141, and the function of the first brake B1 is to brake the generator 130, so that the system can work in the engine direct drive mode. The second brake B2 is arranged on the first planetary carrier 142 and the second planetary carrier 152, and the function of the second brake B2 is to brake the first planetary carrier 142 and the second planetary carrier 152, so that the system can work in the pure electric mode and the extended range mode. The third brake B3 is arranged on the second sun gear 151, and the function of the third brake B3 is to brake the drive motor, so that the system can work in the engine direct drive mode.

[0034] It should be noted that the number of brakes included in the brake group is not limited to Figure 1 The three brakes are shown in the figure. Those skilled in the art can also design other numbers of brakes according to actual needs. For example, the brake group can include only two brakes, or the brake group can include more than three brakes, etc. This embodiment is not limited to this.

[0035] The following will describe in detail the different working modes of the hybrid electromechanical coupling system disclosed in the present invention in conjunction with specific drawings.

[0036] like Figure 2 As shown, the hybrid electromechanical coupling system 100 operates in a pure electric mode, at which the first brake B1 is disconnected, the second brake B2 is engaged, the third brake B3 is disconnected, the engine 110 and the generator 130 are not working, and the drive motor 120 is working. The power of the drive motor 120 is finally transmitted to the system output shaft 160 through the second sun gear 151, the second planetary carrier 152 and the second ring gear 153.

[0037] like Figure 3 As shown, the hybrid electromechanical coupling system 100 operates in a series hybrid mode, at which time the first brake B1 is disconnected, the second brake B2 is engaged, the third brake B3 is disconnected, and the engine 110, the drive motor 120 and the generator 130 are all working. This mode has a total of two power transmission paths. Path 1: The power of the engine 110 is transmitted to the generator 130 by the output shaft of the engine, the first ring gear 143, the first planetary carrier 142 and the first sun gear 141 to generate electricity, and the generated electricity is used by the drive motor 120, or the electric energy is stored in the power battery of the vehicle (not shown in the figure). Path 2: The power of the drive motor 120 is transmitted to the system output shaft 160 through the second sun gear 151, the second planetary carrier 152 and the second ring gear 153.

[0038] like Figure 4As shown, the hybrid electromechanical coupling system 100 operates in the parallel hybrid mode, at which time, the first brake B1 is disconnected, the second brake B2 is disconnected, the third brake B3 is disconnected, and the engine 110, the drive motor 120 and the generator 130 are all working. This mode has a total of three power transmission paths, path 1: the power of the engine 110 is transmitted to the system output shaft 160 via the engine output shaft, the first ring gear 143, the first planetary carrier 142, the second planetary carrier 152 and the second ring gear 153. Path 2: The power of the drive motor 120 is transmitted to the system output shaft 160 via the second sun gear 151, the second planetary carrier 152 and the second ring gear 153. Path 3: The power of the engine 1100 is transmitted to the generator 130 via the engine output shaft, the first ring gear 143, the first planetary carrier 142 and the first sun gear 141 to generate electricity. Of course, in this mode, the generator 130 can also be driven, for example, the power of the generator 130 can be transmitted to the system output shaft 160 via the first sun gear 141, the first planetary carrier 142, the second planetary carrier 152, and the second ring gear 153. In addition, in this mode, the generator 130 can also idle.

[0039] like Figure 5 As shown, the hybrid electromechanical coupling system 100 operates in the engine direct drive mode, at which time, the first brake B1 is engaged, the second brake B2 is disconnected, the third brake B3 is engaged, the engine 110 is working, the drive motor 120 is locked, and the generator 130 is not working. The power of the engine 110 is transmitted to the system output shaft 160 via the output shaft of the engine, the first ring gear 143, the first planetary carrier 142, the second planetary carrier 152 and the second ring gear 153.

[0040] like Figure 6 As shown, the hybrid electromechanical coupling system 100 operates in a braking recovery mode, at which the first brake B1 is disconnected, the second brake B2 is engaged, the third brake B3 is disconnected, and the engine 110, the drive motor 120 and the generator 130 are all not working. In this mode, the power is transmitted to the drive motor 120 through the second ring gear 153, the second planetary carrier 152 and the second sun gear 151, so as to perform braking energy recovery through the drive motor 120. That is to say, in the braking mode, the drive motor 120 can generate a driving torque and generate an induced current in the winding to charge the power battery, effectively saving electric energy.

[0041] The above working modes are specifically shown in Table 1 below:

[0042] Table 1

[0043]

[0044] For example, Figure 1As shown, the driving motor 120 and the generator 130 may be arranged side by side.

[0045] Exemplarily, during the multi-mode switching process, the drive motor 120 participates in the driving. Figure 3 and Figure 4 As shown, when the system is converted from the series hybrid mode to the parallel hybrid mode, the drive motor 120 can continue to work and output power. In this way, it can be ensured that the drive wheels driven by the system output shaft 160 have no power interruption during the mode switching process, and the drive wheels can be ensured to smoothly switch between different working modes, thereby improving the user experience.

[0046] Exemplarily, in the above-mentioned multi-mode switching process, the engagement state of the brake can be changed according to the size relationship between the power battery SOC value and the preset first threshold value, so that the system can achieve multi-mode switching. Alternatively, the engagement state of the brake can be changed according to the size relationship between the vehicle speed value driven by the system and the preset second threshold value, so that the system can achieve multi-mode switching. Alternatively, the engagement state of the brake can be changed according to the size relationship between the power battery SOC value and the preset first threshold value and the size relationship between the vehicle speed value driven by the system and the preset second threshold value at the same time, so that the system can achieve multi-mode switching.

[0047] It should be noted that the first threshold is used to determine the SOC value of the power battery, and the second threshold is used to determine the speed of the vehicle. This embodiment does not limit the value range of the first threshold and the second threshold, which can usually be freely set according to the specific control strategy. Under different control strategies, the values ​​of the first threshold and the second threshold are not exactly the same. After the first threshold and the second threshold are set, the automatic judgment is made and the various modes are automatically switched according to the judgment results.

[0048] For example, Figure 1 As shown, the hybrid electromechanical coupling system 100 further includes a dual mass flywheel 170, which is disposed on the output shaft of the engine 110. Of course, in addition to this, the dual mass flywheel can also be replaced by a torsional damper, etc., and this embodiment does not limit this.

[0049] Another aspect of the present disclosure provides a vehicle, wherein the vehicle includes the hybrid electromechanical coupling system described above. For details, please refer to the above description, and this embodiment will not elaborate on this.

[0050] The vehicle of this embodiment has the hybrid electromechanical coupling system described above, which includes an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group and a system output shaft; the engine and the generator are coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism; the drive motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft, and the system output shaft is used to couple with the drive wheel; the brake in the brake group is set on the first transmission mechanism and / or the second transmission mechanism. In this way, the system can achieve multi-mode switching by changing the braking state of the brake, so as to meet the requirements of different urban working conditions and different vehicle models, and can cover HEV models and PHEV models, with good platformization.

[0051] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A multi-mode switching hybrid electromechanical coupling system, characterized in that: The hybrid electromechanical coupling system includes an engine, a drive motor, a generator, a first transmission mechanism, a second transmission mechanism, a brake group and a system output shaft; The engine and the generator are both coupled to the first transmission mechanism, and the first transmission mechanism is fixedly connected to the second transmission mechanism; The driving motor is coupled to the second transmission mechanism, and the second transmission mechanism is fixedly connected to the system output shaft; Each brake in the brake group is arranged on the first transmission mechanism and / or the second transmission mechanism, so that the system can achieve multi-mode switching by changing the braking state of each brake, and the multi-modes include engine direct drive mode, parallel hybrid mode, series hybrid mode, pure electric mode and brake recovery mode; The first transmission mechanism adopts a first planetary gear mechanism, and the first planetary gear mechanism includes a first sun gear, a first planet carrier and a first ring gear; The first sun gear is connected to the output shaft of the generator, the first planet carrier is coupled to the first sun gear and the first ring gear respectively, the first planet carrier is also fixedly connected to the second transmission mechanism, and the first ring gear is connected to the output shaft of the engine; The brake group includes a first brake, and the first brake is arranged on the first sun gear; The second transmission mechanism adopts a second planetary gear mechanism, and the second planetary gear mechanism includes a second sun gear, a second planet carrier and a second ring gear; The second sun gear is connected to the output shaft of the drive motor, the second planet carrier is coupled to the second sun gear and the second ring gear respectively, the second planet carrier is also fixedly connected to the first planet carrier, and the second ring gear is fixedly connected to the system output shaft; The brake assembly further includes a second brake, which is disposed on the first planet carrier and the second planet carrier; The brake group further includes a third brake, and the third brake is arranged on the second sun gear; During the multi-mode switching process, the driving motor participates in driving.

2. The hybrid electromechanical coupling system according to claim 1, characterized in that: The drive motor and the generator are arranged side by side.

3. The hybrid electromechanical coupling system according to claim 1 or 2, characterized in that: In the braking mode, the drive motor generates a drive torque and generates an induced current in the winding to charge the power battery.

4. The hybrid electromechanical coupling system according to claim 3, characterized in that: According to the relationship between the power battery SOC value and a preset first threshold value, the braking state of the brake is changed so that the system can achieve multi-mode switching; and / or, According to the magnitude relationship between the vehicle speed value driven by the system and a preset second threshold value, the braking state of the brake is changed so that the system can achieve multi-mode switching.

5. A vehicle, characterized in that: The vehicle comprises the hybrid electromechanical coupling system according to any one of claims 1 to 4.

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