WO2023035389A1 - Dual-electric-motor hybrid power system, vehicle, and drive control method and device - Google Patents

Abstract

A dual-electric-motor hybrid power system, comprising an engine, a first electric motor, a second electric motor, a double-row planetary gear mechanism, a first clutch, a second clutch, a brake and an output transmission mechanism, wherein a first planetary carrier in the double-row planetary gear mechanism is connected to a second gear ring; a first gear ring is connected to a second planetary carrier; the engine is connected to a second sun gear and the second gear ring by means of different clutches; a rotor of the second electric motor is connected to the second sun gear; a rotor of the first electric motor is connected to a first sun gear; and the first sun gear is connected to the brake.

Description

A dual-motor hybrid system, vehicle, drive control method and device technical field

The present disclosure relates to but is not limited to hybrid power technology, and more specifically, relates to a dual-motor hybrid power system, a vehicle, and a drive control method and device.

Background technique

With the development of the automobile industry, new energy is the future development trend. Hybrid technology has been developed for many years and has reached a relatively mature stage. Hybrid technology well integrates the respective advantages of internal combustion engine and electric motor, which not only effectively improves the energy consumption and emission of traditional fuel vehicles, but also solves the problems of short mileage, long charging time and limited battery life of current pure electric vehicles. . Hybridization is the best choice for the current development of traditional vehicles.

For models such as micro-hybrid and mild-hybrid, the changes in traditional models are small and the development difficulty is low. For models such as strong hybrid and plug-in hybrid, it is much more complicated, with more technical routes, and is quite different from traditional models. Hybrid transmissions currently on the market mainly include Toyota Hybrid System (THS: Toyota Hybrid System), Honda's intelligent dual-clutch drive system (i-MMD: intelligent Multi-Mode Drive) system, and GM's Volt Hybrid system, Shanghai Roewe's intelligent electric drive transmission (EDU: Electric Drive Unit), BYD's dual-mode (DM: Dual Mode) system, etc. These hybrid transmissions are either complex in structure and control, high in cost, or difficult to meet the requirements in power performance.

Summary of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

An embodiment of the present disclosure provides a dual-motor hybrid system, including an engine, a first motor, a second motor, a double-row planetary gear mechanism with a first planetary gear set and a second planetary gear set, a first clutch, a second Clutches, brakes and output gearing, where:

The first planetary gear set includes a first ring gear, a first planet carrier and a first sun gear, the second planetary gear set includes a second ring gear, a second planet carrier and a second sun gear, and the first The ring gear is connected to the second planet carrier, the first planet carrier is connected to the second ring gear, the first sun gear is connected to the brake, the first ring gear and the second planet carrier are connected to the output transmission mechanism;

The crankshaft of the engine is connected to the second sun gear through the first clutch, and the crankshaft of the engine is also connected to the first planet carrier and the second ring gear through the second clutch; The first sun gear is connected; the rotor of the second motor is connected with the second sun gear; the output transmission mechanism is configured to transmit the power output by the double-row planetary gear mechanism to wheels.

An embodiment of the present disclosure also provides a vehicle, including the dual-motor hybrid power system described in any embodiment of the present disclosure.

The embodiment of the present disclosure also provides a driving control method, which is applied to the vehicle of the embodiment of the present disclosure, and the driving control method includes:

Determine the target operating mode of the two-motor hybrid system;

controlling the controlled component of the dual-motor hybrid system to be in a state corresponding to the target operating mode, so that the dual-motor hybrid system operates in the target operating mode; wherein the controlled component includes the engine , the first motor, the second motor, the first clutch, the second clutch and the brake.

An embodiment of the present disclosure also provides a drive control device, which includes a processor and a memory storing a computer program that can run on the processor, wherein, when the processor executes the computer program, any aspect of the present disclosure can be implemented. A driving control method described in an embodiment.

Other aspects will be apparent to others upon reading and understanding the drawings and detailed description.

Figure overview

FIG. 1 is a hybrid configuration diagram of a dual-motor hybrid system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a power transmission path of the dual-motor hybrid system shown in FIG. 1 in a power split mode;

Fig. 3 is a schematic diagram of the power transmission path of the hybrid driving mode of the dual-motor hybrid system shown in Fig. 1 in the first gear;

Fig. 4 is a schematic diagram of the power transmission path of the pure electric drive mode of the dual-motor hybrid system shown in Fig. 1 under the first gear;

Fig. 5 is a schematic diagram of the power transmission path of the hybrid drive mode in the second gear of the dual-motor hybrid system shown in Fig. 1;

Fig. 6 is a schematic diagram of the power transmission path of the pure electric drive mode in the second gear of the dual-motor hybrid system shown in Fig. 1;

Fig. 7 is a schematic diagram of the power transmission path of the hybrid drive mode in the third gear of the dual-motor hybrid system shown in Fig. 1;

Fig. 8 is a schematic diagram of the power transmission path of the pure electric drive mode in the third gear of the dual-motor hybrid system shown in Fig. 1;

Fig. 9 is a schematic diagram of the power transmission path of the hybrid driving mode of the dual-motor hybrid system shown in Fig. 1 in the R gear;

Fig. 10 is a schematic diagram of the power transmission path of the pure electric drive mode of the dual-motor hybrid system shown in Fig. 1 under the R gear;

Fig. 11 is a schematic diagram of the power transmission path of the dual-motor hybrid system shown in Fig. 1 in the engine starting mode and the charging mode;

FIG. 12 is a flowchart of a driving control method according to an embodiment of the present disclosure;

Fig. 13 is a schematic diagram of a drive control device according to an embodiment of the present disclosure.

1. Engine; 2. First motor; 3. First clutch; 4. Second clutch; 5. Brake; 6. First gear pair; 7. Second motor; 8. Double-row planetary gear mechanism; 81. The first Two sun gears; 82, the second planet carrier; 83, the second ring gear; 84, the first sun gear; 85, the first planet carrier; 86, the first ring gear; 91, the first transmission shaft; 92, the second Transmission shaft; 93, the third transmission shaft; 10, the second gear pair; 11, the output shaft; 12, the differential; 13, the wheels.

detail

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only part of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

In the description of the present disclosure, words such as "exemplary" or "for example" are used to mean an example, illustration or illustration. Any embodiment described in this disclosure as "exemplary" or "for example" should not be construed as better or advantageous over other embodiments. "And/or" in this article is a description of the relationship between associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A exists alone, both A and B exist, and they exist alone B these three situations. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Directional indications (such as up, down, left, right, front, back) in the embodiments of the present disclosure are only used to explain the relative positional relationship and movement between the various components in a certain posture (as shown in the drawings). conditions, etc., rather than indicating or implying that the referred structure has a particular orientation, is constructed and operates in a particular orientation, and that when that particular orientation changes, the directional indication changes accordingly. Therefore, it should not be construed as limiting the present disclosure. In addition, in the embodiments of the present disclosure, the descriptions involving "first", "second", etc. are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features . Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

In the present disclosure, unless otherwise specified and limited, the terms "connection" and "fixation" should be interpreted in a broad sense, for example, "fixation" can be fixed connection, detachable connection, or integration; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

The technical solutions of the various embodiments of the present disclosure can be combined with each other, but it is based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist. It is not within the scope of protection claimed by the present disclosure.

In this article, the clutch includes a first transmission end and a second transmission end. Clutch engagement refers to the combination between the first transmission end and the second transmission end of the clutch. Power can be transmitted from one end of the clutch to the other end. Clutch separation refers to the second transmission end of the clutch. There is separation between the first transmission end and the second transmission end, and power cannot be transmitted from one end of the clutch to the other end. In one example, the clutch may be a drum clutch with the first drive end of the clutch being an inner drum and the second drive end of the clutch being an outer drum, or the first drive end of the clutch being an outer drum and the second drive end of the clutch being an outer drum. Inner drum.

In this article, the motor can rotate forward or reversely. For the convenience of expression, when the rotation direction of the motor is not directly described, it should be understood that the motor rotates forward.

An embodiment of the present disclosure provides a dual-motor hybrid power system, and its hybrid configuration is shown in Figure 1, including three prime movers: engine 1 (indicated by ICE or internal combustion engine in the figure), the first Motor 2 (shown by P1 in the figure) and a second motor 7 (shown by P2 in the figure). The hybrid power system also includes a first clutch 3 (indicated by C1 in the figure) and a second clutch 4 (indicated by C2 in the figure). A brake 5 (represented by B1 in the figure), a double planetary gear mechanism 8 and an output transmission mechanism; the output transmission mechanism is configured to transmit the power output by the double row planetary gear mechanism to the wheels.

As shown in FIG. 1 , the double row planetary gear mechanism 8 of the embodiment of the present disclosure includes a first planetary gear set and a second planetary gear set. The first planetary gear set includes a first sun gear 84 , a first planet carrier 85 and a first ring gear 86 , and the second planetary gear set includes a second sun gear 81 , a second planet carrier 82 and a second ring gear 83 . Between the components of the double row planetary gear mechanism 8 , the first ring gear 86 is connected to the second planet carrier 82 , and the first planet carrier 85 is connected to the second ring gear 83 .

As shown in Figure 1, the first sun gear 84 is connected to the brake 5, the first ring gear 86 and the second planet carrier 82 are connected to the output transmission mechanism, and the output transmission mechanism is set to output the power of the double-row planetary gear mechanism 8 Pass to wheel 13. The crankshaft of the engine 1 is connected to the second sun gear 81 through the first clutch 3 , and the crankshaft of the engine 1 is also connected to the first planet carrier 85 and the second ring gear 83 through the second clutch 4 . The rotor of the first motor 2 is connected to the first sun gear 84 , and the rotor of the second motor 7 is connected to the second sun gear 81 .

The first motor 2 and the second motor 7 can be powered by a battery (not shown in the figure), and work in motor mode. Equipment such as a motor controller, a rectifier, and a booster can be arranged between the motor and the battery. The first motor 2 and the second motor 7 can also work in generator mode to charge the battery.

Based on the hybrid configuration shown in Figure 1, the second sun gear 81, the first sun gear 84, the second ring gear 83 and the first planet carrier 85 can be used as the power input member of the double-row planetary gear mechanism 8, the first gear The ring 86 and the second planet carrier 82 serve as power output members of the double row planetary gear mechanism 8 . Based on the hybrid configuration of this embodiment, the double row planetary gear mechanism 8 can cooperate with the first clutch 3 , the second clutch 4 and the brake 5 to realize various transmission ratios and various working modes.

In an exemplary embodiment of the present disclosure, in terms of the spatial arrangement of each component, the double-row planetary gear mechanism 8 can be arranged between the first motor 2 and the second motor 7, and the engine 1 can be arranged between the first motor 2 A side away from the second motor 7 . The brake 5 is arranged between the first motor 1 and the double row planetary gear mechanism 8 . The first clutch 3 and the second clutch 4 are arranged inside the rotor of the first motor 2 , such as at least partly located in a cavity surrounded by the rotor of the first motor 2 .

In an exemplary embodiment of the present disclosure, the output transmission mechanism includes a first gear pair 6 , an output shaft 11 , a second gear pair 10 and a differential 12 connected in sequence. But the output transmission mechanism of the present disclosure is not limited to the structure shown in this embodiment. The engine 1 , the first motor 2 , and the second motor 7 can drive the double-row planetary gear mechanism 8 , and then transmit the power output by the double-row planetary gear mechanism 8 to the wheels 13 through the output transmission mechanism. Wherein, the driving wheel of the first gear pair 6 is connected with the first ring gear 86 and the second planet carrier 82, and the driving wheel of the first gear pair 6 can be arranged on the side of the double row planetary gear mechanism 8 facing the first motor 2 or The side away from the first motor 2. The power output by the double-row planetary gear mechanism 8 is sequentially transmitted through the first gear pair 6 , the output shaft 11 , the second gear pair 10 and the differential 12 , and finally drives the wheels 13 to rotate.

In an exemplary embodiment of the present disclosure, the dual-motor hybrid system further includes a first transmission shaft 91, the rotor of the second motor 7, the second sun gear 81 and the first transmission end of the first clutch 3 are all connected to the first On a power transmission shaft 91. The second transmission end of the first clutch 3 is connected with the crankshaft of the engine 1 (other transmission components such as flywheels can be arranged between the second transmission end of the first clutch 3 and the crankshaft of the engine 1 ). When the second motor 7 works in motor mode, it drives the second sun gear 81 through the first transmission shaft 91 , and transmits power to the output transmission mechanism through the double-row planetary gear mechanism 8 . When the first clutch 3 is engaged, the engine 1 drives the second sun gear 81 through the first clutch 3 and the first transmission shaft 91 , and transmits power to the first gear pair 6 through the double-row planetary gear mechanism 8 and the output transmission mechanism.

In an exemplary embodiment of the present disclosure, the dual-motor hybrid system further includes a second transmission shaft 92, and the second ring gear 83, the first planet carrier 85 and the first transmission end of the second clutch 4 are all connected to the second On the transmission shaft 92. The second transmission end of the second clutch 4 is connected with the crankshaft of the engine 1 (other transmission members such as flywheels can be arranged between the second transmission end of the second clutch 4 and the crankshaft of the engine 1 ). When the second clutch 4 is combined, the engine 1 can drive the second ring gear 83 and the first planet carrier 85 through the second clutch 4 and the second transmission shaft 92, and transmit power to the wheels through the double-row planetary gear mechanism 8 and the output transmission mechanism. 13. In the illustrated example, the second transmission shaft 92 is configured as a hollow shaft and sleeved outside the first transmission shaft 91 .

In an exemplary embodiment of the present disclosure, the dual-motor hybrid power system further includes a third transmission shaft 93 to which the first sun gear 84 , the movable end of the brake 5 and the rotor of the first motor 2 are all connected. superior. The fixed end of the brake 5 is fixed relative to the vehicle body. When the brake 5 is combined, that is, when the fixed end and the movable end of the brake 5 are combined, both the first sun gear 84 and the rotor of the first motor 2 are fixed. When the brake 5 is separated, that is, when the fixed end and the movable end of the brake 5 are separated, the first motor 2 working in the motor mode can drive the first sun gear 84 through the third transmission shaft 93, and the first sun gear 84 can be driven by the double-row planetary gear mechanism 8 and the output transmission mechanism. The power is transmitted to the wheels 13, or part or all of the power of the engine 1 and the second motor 7 driving the double-row planetary gear mechanism 8 can also drive the first motor 2 working in generator mode through the first sun gear 84 to charge the battery. In the illustrated example, the third transmission shaft 93 is configured as a hollow shaft, sleeved on the outside of the second transmission shaft 92 and the first transmission shaft 91 .

Based on the dual-motor hybrid power system of the above-mentioned embodiments of the present disclosure, the engine 1 can be connected to different components of the double-row planetary gear mechanism 8 through different clutches to achieve different transmission ratios, so that more gears can be driven. The dual-motor hybrid power system in the embodiment of the present disclosure has a simple structure and uses a small number of clutches and brakes, which can reduce control difficulty and improve system reliability. However, it can still realize third-speed driving when working, and has good power performance. Moreover, the hybrid configuration is highly integrated, requiring little space and low cost.

An embodiment of the present disclosure also provides a vehicle, including the dual-motor hybrid power system described in any embodiment of the present disclosure.

An embodiment of the present disclosure also provides a driving control method, which is applied to a vehicle having the dual-motor hybrid system described in any embodiment of the present disclosure. As shown in FIG. 12 , the driving control method includes: Step 110, Determine the target operating mode of the dual-motor hybrid system; step 120, control the controlled components of the dual-motor hybrid system to be in a state corresponding to the target operating mode, and make the dual-motor hybrid system work at the target Working mode; wherein, the controlled components include the engine, the first motor, the second motor, the first clutch, the second clutch and the brake.

The above control method can be implemented by a drive control device electrically connected to the controlled component. As for how to determine the target operating mode of the dual-motor hybrid system, reference may be made to existing methods, which will not be repeated here. Here we will mainly talk about how to achieve the target working mode by controlling the state of the controlled components based on the hybrid configuration of the dual-motor hybrid system in the embodiment of the present disclosure.

In an exemplary embodiment of the present disclosure, the target operating mode includes a power split (PS: Power Split) mode, and the state of each controlled component corresponding to the power split mode is: the engine 1 is working, and the first motor 2 is working at In the generator mode, the second motor 7 works in the motor mode, the first clutch 3 is disengaged, the second clutch 4 is engaged, and the brake 5 is disengaged. The power transmission relationship is shown by the thick solid line in Figure 2. Among them, the engine 1 drives the first planet carrier 85 and the second ring gear 83 through the second clutch 4, and the second motor 7 drives the second sun gear 81. In the second planetary gear set, the second sun gear 81 and the second gear Ring 83 is the active part, and the second planetary carrier 82 is the passive part. The power is transmitted to the output transmission mechanism through the second planetary carrier 82. In this mode, the reduction ratio of the double row planetary gear mechanism 8 can be adjusted according to the components of the second planetary gear set. The gear ratio is fixed. In the first planetary gear set, the first planet carrier 85 is connected with the second ring gear 83, the first ring gear 86 is connected with the second planet carrier 82, and the first sun gear 84 is used as a passive part to drive and work in power generation. The first motor 2 in machine mode charges the battery. At this time, part of the power driven by the engine 1 to drive the double-row planetary gear mechanism 8 is shunted to the first motor 2 through the first sun gear 84 , and converted into electric energy and stored in the battery.

In an exemplary embodiment of the present disclosure, the target operating mode includes one or more of a pure electric driving mode in a first gear and a hybrid driving mode in a first gear.

The state of each controlled component corresponding to the hybrid driving mode in the first gear is: the engine 1 is working, the first motor 2 is not working, the second motor 7 is working in the motor mode, the first clutch 3 is engaged, the second clutch 4 is disengaged, and the brake 5 combined. The path of power transmission is shown by the thick solid line in Fig. 3 . Wherein, the engine 1 drives the second sun gear 81 through the first clutch 3, and the second motor 7 also drives the second sun gear 81. Since the first sun gear 84 is fixed by the brake 5, the first planetary gear set and the second planetary gear set Working together for transmission, the power input from the second sun gear 81 is transmitted to the wheels 13 through the double-row planetary gear mechanism 8 and the output transmission mechanism. In this mode, the speed reduction ratio of the double planetary gear mechanism can be determined according to the gear ratios of the components of the first planetary gear set and the second planetary gear set. Since power is input to the double-row planetary gear mechanism 8 from the sun gear with a small number of teeth under this mode, the reduction ratio of the double-row planetary gear mechanism 8 is relatively large, which is suitable for occasions where the speed of the vehicle is relatively slow.

The state of each controlled component corresponding to the pure electric drive mode in the first gear is: the engine 1 does not work, the first motor 2 does not work, the second motor 7 works in the motor mode, the first clutch 3 is disengaged, and the second clutch 4 is disengaged , the brake 5 is combined. The path of power transmission is shown by the thick solid line in Fig. 4 . Wherein, the second motor 7 drives the second sun gear 81. Since the first sun gear 84 is fixed by the brake 5, the first planetary gear set and the second planetary gear set work together for transmission, and the power input from the second sun gear 81 passes through The double-row planetary gear mechanism 8 and the output transmission mechanism are transmitted to the wheels 13 . Compared with the hybrid driving mode of the first gear, in this mode, the engine 1 does not provide power, but only the second electric motor 7 provides power, and the reduction ratio of the double-row planetary gear mechanism remains unchanged.

Based on the hybrid configuration of the power system in the embodiment of the present disclosure, the engine dynamic mode under the first gear can also be realized. At this time, the engine 1 is working, the second motor 7 and the first motor 2 are not working, the first clutch 3 is engaged, and the second Clutch 4 is disengaged and brake 5 is engaged. The engine 1 drives the second sun gear 81 through the first clutch 3 , and the power is transmitted to the wheels 13 through the double-row planetary gear mechanism 8 and the output transmission mechanism. Considering the conversion efficiency of the engine, in an exemplary embodiment of the present disclosure, the first gear can be operated in the pure electric driving mode, and no other modes are realized. However, in other embodiments, the above-mentioned hybrid driving mode or engine driving mode can also be realized in the first gear.

In an exemplary embodiment of the present disclosure, the target operating mode includes one or more of a hybrid driving mode in the second gear and a pure electric driving mode in the second gear.

The state of each controlled component corresponding to the hybrid drive mode under the second gear is: the engine 1 is working, the first motor 2 is not working or is working in the motor mode, the second motor 7 is working in the motor mode, the first clutch 3 is disengaged, and the second motor 2 is in the motor mode. The clutch 4 is engaged and the brake 5 is disengaged. The power transmission relationship is shown by the thick solid line in Figure 5. Among them, the engine 1 drives the first planet carrier 85 and the second ring gear 83 through the second clutch 4, and the second motor 7 drives the second sun gear 81. In the second planetary gear set, the second sun gear 81 and the second gear The ring 83 is the active part, the second planetary carrier 82 is the passive part, the power is transmitted to the output transmission mechanism through the second planetary carrier 82, and the reduction ratio of the double row planetary gear mechanism 8 can be determined according to the gear ratios of the components of the second planetary gear set . In one example, the first motor 2 does not work, the first sun gear 84 can rotate freely, and the first planetary gear set does not participate in transmission. In another example, the first motor 2 works in motor mode to drive the first sun gear 84 to rotate. At this time, the engine 1 , the second motor 7 and the first motor 2 jointly drive the wheels to provide maximum power output. The difference between this mode and the power split mode is that the state of the first electric machine 2 is different. The power split mode can also be regarded as a specific working mode under the second gear.

The state of each controlled component corresponding to the pure electric drive mode under the second gear is: the engine 1 does not work, the first motor 2 works in the generator mode or works in the motor mode, the second motor 7 works in the motor mode, and the first clutch 3 is disengaged, the second clutch 4 is disengaged, and the brake 5 is disengaged. The path of power transmission is shown by the thick solid line in Fig. 6 . Among them, the second motor 7 drives the second sun gear 81, and the first motor 2 can work in the motor mode to drive the first sun gear 84. At this time, the first planetary gear set and the second planetary gear set work together for transmission, and the power passes through the double The planetary gear mechanism 8 and the output transmission mechanism are transmitted to the wheels 13. In this mode, the first electric motor 2 can also work in generator mode, shunting a part of the power of the second electric motor 7 to charge the battery.

Based on the dual-motor hybrid power system of the embodiment of the present disclosure, the engine driving mode in the second gear can also be realized, which will not be repeated here.

In the embodiment of the present disclosure, the reduction ratio of the double-row planetary gear mechanism at the second gear is between the first gear and the third gear. It can reduce the shifting speed steps from the first gear to the third gear, and improve the shifting quality. Similar to the power split mode, through the active intervention (driving or power generation) of the first motor and/or the second motor, stepless speed regulation or graded speed regulation can be realized.

In an exemplary embodiment of the present disclosure, the target operating mode includes one or more of a hybrid driving mode in third gear, a pure electric driving mode in third gear, and an engine driving mode in third gear.

The state of each controlled component corresponding to the hybrid drive mode under the third gear is: the engine 1 works, the first motor 2 does not work or works in the motor mode or works in the generator mode, the second motor 7 works in the motor mode, and the first motor 7 works in the motor mode. The clutch 3 is engaged, the second clutch 4 is engaged, and the brake 5 is disengaged. The power transmission relationship is shown by the thick solid line in Fig. 7 . Wherein, the engine 1 drives the second sun gear 81 and the first planet carrier 85 through the first clutch 3 and the second clutch 4 respectively. The second motor 7 drives the second sun gear 81. Since the second sun gear 81 and the second ring gear 83 are connected through the first clutch 3 and the second clutch 4, the double-row planetary gear mechanism 8 is locked to become a direct gear and reduce the speed. The ratio is 1. Power is transmitted to wheel 13 from double-row planetary gear mechanism 8, output transmission mechanism.

The state of each controlled component corresponding to the pure electric drive mode under the third gear is: the engine 1 does not work, the first motor 2 does not work or works in the motor mode or works in the generator mode, the second motor 7 works in the motor mode, The first clutch 3 is engaged, the second clutch 4 is engaged, and the brake 5 is disengaged. The power transmission relationship is shown by the thick solid line in Fig. 8 . Wherein, the second motor 7 drives the second sun gear 81. Since the second sun gear 81 and the second ring gear 83 are connected through the first clutch 3 and the second clutch 4, the double-row planetary gear mechanism 8 is locked and becomes a direct gear. , the reduction ratio is 1. The power is transmitted to the wheels 13 from the double-row planetary gear mechanism 8 and the output transmission mechanism.

The state of each controlled component corresponding to the engine driving mode under the third gear is: the engine 1 is working, the first motor 2 is not working or is working in the generator mode, the second motor 7 is not working, the first clutch 3 is engaged, and the second clutch 4 is combined, and the brake 5 is separated. The power transmission relationship is shown by the thick solid line in Fig. 9 . Wherein, the engine 1 drives the second sun gear 81 and the first planet carrier 85 through the first clutch 3 and the second clutch 4 . Since the second sun gear 81 and the second ring gear 83 are connected through the first clutch 3 and the second clutch 4, the double-row planetary gear mechanism 8 is locked and becomes a direct gear with a reduction ratio of 1. The power is transmitted to the wheels 13 from the double-row planetary gear mechanism 8 and the output transmission mechanism.

In the hybrid drive mode and pure electric drive mode under the third gear, the first motor 2 can have three states, the first one is not working, and the rotor of the first motor 2 can rotate freely under the drive of the first sun gear 84; The second is that the first motor 2 works in the generator mode to charge the battery; the third is that the first motor 2 works in the motor mode to drive the first sun gear 84 to provide power for the vehicle. In practical applications, the state of the first motor 2 in each mode can be restricted according to requirements, for example, the first motor 2 is only allowed to be in one or two of the above three states.

The hybrid configuration of the dual-motor hybrid system in the embodiment of the present disclosure can realize three gears, and appropriate driving wheel torque and rotation speed can be obtained by changing the gears.

In an exemplary embodiment of the present disclosure, the target working mode includes a pure electric driving mode in R gear (ie reverse gear).

The state of each controlled component corresponding to the pure electric drive mode under the R gear is: the engine 1 does not work, the first motor 2 does not work, the second motor 7 works in the motor mode and rotates in reverse, the first clutch 3 is disengaged, the second The two clutches 4 are separated, and the brake 5 is combined. The power transmission relationship is shown by the thick solid line in Figure 10. Wherein, the second motor 7 reversely drives the second sun gear 81, which can drive the second planet carrier 82 to rotate in reverse, and the power is transmitted from the double-row planetary gear mechanism 8 and the output transmission mechanism to the wheels 13, driving the 13 wheels of the car to rotate in reverse. Realize reversing. Since the first sun gear 84 is fixed by the brake 5, the first planetary gear set and the second planetary gear set work together for transmission, and the reduction ratio of the double row planetary gear mechanism 8 can be according to the first planetary gear set and the second planetary gear set. The gear ratio of each component is determined.

Based on the hybrid configuration of the power system of the embodiment of the present disclosure, the engine starting mode and the charging mode can also be realized. Wherein, under the engine starting mode, the first clutch 3 is controlled to be combined, so that the second motor 7 is connected to the engine 1; the brake 5 is controlled to be separated from the second clutch 4, so that the double-row planetary gear mechanism 8 is in a neutral state. At this time, the first The motor 2 does not work, the second motor 7 works in the motor mode, the second motor 7 drives the engine 1 to a preset speed, and then the engine 1 injects fuel and ignites to start the engine 1 . In the charging mode, the first clutch 3 is combined, the second motor 7 is connected to the engine 1, and the brake 5 is separated from the second clutch 4, so that the double-row planetary gear mechanism 8 is in a neutral state, the engine 1 has started, and the second motor 7 is in generator mode, and the engine 1 drives the second motor 7 to generate electricity to charge the battery. The power transmission paths in both the engine start mode and the charge mode can be shown in Figure 11, but in the engine start mode, the power is transmitted from the second motor to the engine, and in the charge mode, the power is transmitted from the engine to the second motor. motor. The hybrid configuration of the power system based on the embodiments of the present disclosure can realize other working modes, for example, energy recovery mode, etc., which will not be repeated here.

An embodiment of the present disclosure also provides a drive control device, as shown in FIG. 13 , including a processor 50 and a memory 60 storing a computer program, wherein, when the processor 50 executes the computer program, any of the following aspects of the present disclosure are implemented. A driving control method described in an embodiment.

In the driving control method of the hybrid power transmission system in the embodiment of the present disclosure, there are 3 gears to choose when the vehicle is moving forward, and the torque and speed of the driving wheels can be increased by changing the gear; the second motor has a flexible working mode and can be realized by driving the vehicle alone Pure electric driving can also be used to start the engine. In the hybrid drive mode, the second electric motor can provide boost for the engine, improve the acceleration capability of the vehicle, and ensure the acceleration of the vehicle. The first electric machine can generate electricity to charge the battery. According to the driving wishes of the car owner, various gears and modes can be reasonably selected to make the engine work in a suitable high-efficiency area, reduce engine fuel consumption and improve fuel economy. The hybrid power transmission system of the embodiment of the present disclosure has excellent dynamic performance on the basis of economical efficiency, and is especially suitable for large and medium-sized sports utility vehicles (SUV: sport utility vehicles).

An embodiment of the present disclosure also provides a computer-readable storage medium, where a computer program that can run on a processor is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the above-mentioned The steps of any one of the driving control methods have all the above-mentioned beneficial effects, and will not be repeated here.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

Although the embodiments disclosed in the present disclosure are as above, the content described is only the embodiments adopted to facilitate understanding of the present disclosure, and is not intended to limit the present disclosure. Anyone skilled in the art to which this disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this disclosure, but the scope of patent protection of this disclosure must still be It shall prevail as defined in the appended claims.

Claims (15)

A two-motor hybrid system comprising an engine, a first electric machine, a second electric machine, a double row planetary gear mechanism having a first planetary gear set and a second planetary gear set, a first clutch, a second clutch, a brake and an output transmission institutions, where: The first planetary gear set includes a first ring gear, a first planet carrier and a first sun gear, the second planetary gear set includes a second ring gear, a second planet carrier and a second sun gear, and the first The ring gear is connected to the second planet carrier, the first planet carrier is connected to the second ring gear, the first sun gear is connected to the brake, the first ring gear and the second planet frame connected to the output drive mechanism; The crankshaft of the engine is connected to the second sun gear through the first clutch, and the crankshaft of the engine is also connected to the first planet carrier and the second ring gear through the second clutch; the first The rotor of the motor is connected to the first sun gear; the rotor of the second motor is connected to the second sun gear; the output transmission mechanism transmits the power output by the double-row planetary gear mechanism to wheels. The two-motor hybrid power system as claimed in claim 1, wherein: The double-row planetary gear mechanism is arranged between the first motor and the second motor, the engine is arranged on the side of the first motor away from the second motor, and the brake is arranged on the Between the first motor and the double-row planetary gear mechanism, the first clutch and the second clutch are disposed inside a rotor of the first motor. The dual-motor hybrid power system as claimed in claim 2, It also includes a first transmission shaft, the rotor of the second motor, the second sun gear and the first transmission end of the first clutch are all connected to the first transmission shaft, and the first transmission end of the first clutch is connected to the first transmission shaft. The two transmission ends are connected to the crankshaft of the engine; When the second motor works in the electric motor mode, it drives the second sun gear through the first transmission shaft; when the first clutch is engaged, the engine drives the second sun gear through the first clutch and the first transmission A shaft drives the second sun gear. The dual-motor hybrid power system as claimed in claim 3, It also includes a second transmission shaft, the second ring gear, the first planet carrier and the first transmission end of the second clutch are all connected to the second transmission shaft, and the second transmission end of the second clutch The transmission end is connected to the crankshaft of the engine; the second transmission shaft is a hollow shaft sleeved outside the first transmission shaft; When the second clutch is engaged, the engine drives the second ring gear and the first planet carrier through the second clutch and the second transmission shaft. The dual-motor hybrid power system according to claim 4, It also includes a third transmission shaft, the first sun gear, the movable end of the brake and the rotor of the first motor are all connected to the third transmission shaft, and the fixed end of the brake is fixed relative to the vehicle body; The third transmission shaft is a hollow shaft sleeved outside the second transmission shaft; When the brake is engaged, both the first sun gear and the rotor of the first motor are fixed; when the brake is disengaged, the first motor working in motor mode drives the The first sun gear, or the first sun gear drives the first motor working in generator mode to charge the battery. The two-motor hybrid power system as claimed in claim 2, wherein: The output transmission mechanism includes a first gear pair, an output shaft, a second gear pair and a differential gear connected in sequence, and the driving wheel of the first gear pair is connected with the first ring gear and the second planet carrier The driving wheel of the first gear pair is arranged on the side of the double-row planetary gear mechanism facing the first motor or on the side of the double-row planetary gear mechanism away from the first motor. A vehicle comprising the dual-motor hybrid power system as claimed in any one of claims 1 to 6. A drive control method applied to the vehicle according to claim 7, the drive control method comprising: Determine the target operating mode of the two-motor hybrid system; controlling the controlled component of the dual-motor hybrid system to be in a state corresponding to the target operating mode, so that the dual-motor hybrid system operates in the target operating mode; wherein the controlled component includes the engine , the first motor, the second motor, the first clutch, the second clutch and the brake. The driving control method according to claim 8, wherein: The target operating mode includes a power split mode, and the state of the controlled component corresponding to the power split mode is: the engine is working, the first motor is working in the generator mode, the second motor is working in the motor mode, and the first clutch is disengaged , the second clutch is engaged and the brake is disengaged. The driving control method according to claim 8, wherein: The target working mode includes one or more of the pure electric driving mode under the first gear and the hybrid driving mode under the first gear; The state of the controlled component corresponding to the pure electric drive mode under the first gear is: the engine does not work, the first motor does not work, the second motor works in the electric motor mode, the first clutch is disengaged, the second clutch is disengaged, the brake combined; The state of the controlled component corresponding to the hybrid driving mode in the first gear is: the engine is working, the first motor is not working, the second motor is working in motor mode, the first clutch is engaged, the second clutch is disengaged, and the brake is engaged. The driving control method according to claim 8, wherein: The target working mode includes one or more of the hybrid driving mode under the second gear and the pure electric driving mode under the second gear; The state of the controlled component corresponding to the hybrid drive mode under the second gear is: the engine is working, the first motor is not working or is working in the motor mode, the second motor is working in the motor mode, the first clutch is disengaged, and the second clutch combine, brake apart; The state of the controlled component corresponding to the pure electric drive mode in the second gear is: the engine does not work, the first motor works in generator mode or in motor mode, the second motor works in motor mode, and the first clutch Disengaged, second clutch disengaged, brake disengaged. The driving control method according to claim 8, wherein: The target operating mode includes one or more of the hybrid drive mode under the third gear, the pure electric drive mode under the third gear and the engine drive mode under the third gear; The state of the controlled component corresponding to the hybrid drive mode in the third gear is: the engine is working, the first motor is not working or is working in the motor mode or in the generator mode, the second motor is working in the motor mode, and the first motor is in the motor mode. The clutch is engaged, the second clutch is engaged, and the brake is released; The state of the controlled component corresponding to the pure electric drive mode in the third gear is: the engine does not work, the first motor does not work or works in the motor mode or in the generator mode, the second motor works in the motor mode, The first clutch is engaged, the second clutch is engaged, and the brake is released; The state of the controlled component corresponding to the engine driving mode under the third gear is: the engine is working, the first motor is not working or is working in generator mode, the second motor is not working, the first clutch is engaged, and the second clutch is engaged , the brakes are disengaged. The driving control method according to claim 8, wherein: The target operating mode includes a pure electric drive mode under the R gear; The state of the controlled component corresponding to the pure electric drive mode under the R gear is: the engine does not work, the first motor does not work, the second motor works in the motor mode and rotates in reverse, the first clutch is disengaged, the second The clutch disengages and the brake engages. The driving control method according to claim 8, wherein: The target operating mode includes a starting engine mode and a charging mode; The states of the controlled components corresponding to the starting engine mode are: the first clutch is engaged, the second clutch is disengaged, the brake is disengaged, the first motor is not working, and the second motor is working in the motor mode to start the engine; The state corresponding to the charging mode of the controlled component is: the first clutch is engaged, the second clutch is disengaged, the brake is disengaged, the first motor is not working, and the engine is working to drive the second motor working in generator mode to charge the battery . A drive control device, comprising a processor and a memory storing a computer program, wherein the drive control method according to any one of claims 8 to 14 is implemented when the processor executes the computer program.

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