Power system of hybrid electric vehicle and hybrid electric vehicle

Abstract

The utility model provides a power system of a hybrid electric vehicle, which relates to the technical field of power and comprises an input shaft, an output shaft, a first-gear gear set, a second-gear gear set and a third-gear gear set. The input part of the first-gear gear set and the input part of the third-gear gear set are connected with the input shaft through the first gear shifting mechanism, and the output part of the first-gear gear set and the output part of the third-gear gear set are connected with the output shaft; or the input part of the first-gear gear set and the input part of the third-gear gear set are connected with the input shaft, and the output part of the first-gear gear set and the output part of the third-gear gear set are connected with the output shaft through the first gear shifting mechanism; the first gear shifting mechanism, the second gear shifting mechanism and the third gear shifting mechanism of the power system replace an original double-clutch component, and the power transmission strategy is adjusted, so that the working mode of the power system of the hybrid electric vehicle is improved, and the power economy and the gear shifting smoothness are optimized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power technology field, more specifically, it relates to a kind of power system of hybrid electric vehicle and hybrid electric vehicle. BACKGROUND

[0002] Current pure electric vehicle endurance mileage is short, charging time is long and battery pack cost is difficult to reduce in short time, so hybrid power system emerges as the times require, as the key technology in the transition process from traditional fuel vehicle to new pure electric vehicle, hybrid power system can make up for each other, make up for the deficiency of internal combustion engine system and pure electric system.So hybrid electric vehicle emerges as the times require and is widely respected, major car companies are actively developing hybrid electric vehicle, improve the power performance and fuel economy of whole vehicle, reduce carbon emissions.

[0003] The power system of existing hybrid electric vehicle is generally developed based on traditional double clutch component, when driving motor does not participate in driving, engine and generator can only be driven through fixed set of transmission mechanism, motor can be used for power generation or driving;Double clutch component BOM cost is higher;Double clutch component drag resistance is larger, cause power loss;High-speed cruise stage operation mode is single, three power sources must participate in driving, not conducive to improve fuel economy. UTILITY MODEL CONTENTS

[0004] The utility model aims at the prior art deficiency, provide a kind of power system of hybrid electric vehicle and hybrid electric vehicle to solve the problems, such as the cost of the power system of existing hybrid electric vehicle is higher, power loss is larger and high-speed cruise stage operation mode is single in the above background art.

[0005] To achieve the above object, the utility model provides a kind of power system of hybrid electric vehicle, the power system includes:

[0006] Input shaft, output shaft, first gear group, second gear group and third gear group;

[0007] First shift mechanism, the input of the first gear group and the input of the third gear group are connected with the input shaft through first shift mechanism, the output of the first gear group and the output of the third gear group are connected with the output shaft, or the input of the first gear group and the input of the third gear group are connected with the input shaft, the output of the first gear group and the output of the third gear group are connected with the output shaft through first shift mechanism;

[0008] Second shift mechanism, the input shaft is connected with the input of the second gear group through second shift mechanism;

[0009] a third shift mechanism, the output shaft and the output part of the second gear set are connected through the third shift mechanism;

[0010] an engine and a clutch, the output end of the engine is connected with the input shaft through the clutch;

[0011] a first motor and a second motor, the output end of the first motor is connected with the input shaft, and the output end of the second motor is connected with the second gear set;

[0012] a battery pack, the first motor and the second motor are electrically connected with the battery pack.

[0013] Preferably, the first gear set comprises a first driving gear and a first driven gear, the first driving gear is the input part of the first gear set, the first driven gear is the output part of the first gear set, and the first driving gear and the first driven gear are meshed and connected.

[0014] Preferably, the second gear set comprises a second driving gear and a second driven gear, the second driving gear is the input part of the second gear set, the second driven gear is the output part of the second gear set, and the second driving gear and the second driven gear are meshed and connected.

[0015] Preferably, the third gear set comprises a third driving gear and a third driven gear, the third driving gear is the input part of the third gear set, the third driven gear is the output part of the third gear set, and the third driving gear and the third driven gear are meshed and connected.

[0016] Preferably, the first motor is arranged on one side of the input shaft, and the power system of the hybrid electric vehicle further comprises a first driving gear and a first driven gear, the output end of the first motor is connected with the first driving gear, the first driven gear is connected with the input shaft, and the first driving gear and the first driven gear are meshed and connected.

[0017] Preferably, the second motor is arranged on one side of the input shaft, and the power system of the hybrid electric vehicle further comprises a second driving gear, the output end of the second motor is meshed and connected with the second driving gear, and the second driving gear is meshed and connected with the second driving gear.

[0018] Preferably, the power system of the hybrid vehicle further comprises a third driving gear and a third driven gear, the third driving gear is connected with the output shaft, and the third driven gear is connected with a wheel assembly of the vehicle.

[0019] Preferably, the second driving gear is a single gear or a double gear.

[0020] Preferably, the double gear comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are coaxially connected, the first transmission gear is connected with the second driving gear, the first transmission gear is in meshing connection with the second driving gear, and the second transmission gear is in meshing connection with the second driven gear.

[0021] A hybrid vehicle comprises a power system of the hybrid vehicle.

[0022] The power system of the hybrid vehicle has the beneficial effects that: the input part of the first gear set and the input part of the third gear set are connected with the input shaft through the first gear shifting mechanism, the output part of the first gear set and the output part of the third gear set are connected with the output shaft, the input shaft is connected with the input part of the second gear set through the second gear shifting mechanism, the output shaft is connected with the output part of the second gear set through the third gear shifting mechanism, or the input part of the first gear set and the input part of the third gear set are connected with the input shaft, and the output part of the first gear set and the output part of the third gear set are connected with the input shaft through the first gear shifting mechanism; the first gear shifting mechanism, the second gear shifting mechanism and the third gear shifting mechanism of the power system replace the original double clutch component, the power transmission strategy is adjusted, the working mode of the power system of the hybrid vehicle is improved, and the power economy and gear shifting smoothness are optimized.

[0023] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and wherein exemplary embodiments of the present application are shown.

[0025] Figure 1 Fig. 1 shows a structure schematic diagram of a power system of a hybrid vehicle according to an embodiment of the present application, wherein a first gear shifting mechanism of the power system is arranged on an input shaft;

[0026] Figure 2A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a pure electric mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0027] Figure 3 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a series extended range mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0028] Figure 4 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a parking charging mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0029] Figure 5 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a driving charging mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0030] Figure 6 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in an engine direct drive mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0031] Figure 7 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a parallel driving mode circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0032] Figure 8 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a brake energy recovery circuit schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0033] Figure 9 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a double gear structure schematic diagram when the first gear shifting mechanism is arranged on an input shaft according to an embodiment of the present application;

[0034] Figure 10 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a structure schematic diagram when the first gear shifting mechanism is arranged on an output shaft according to an embodiment of the present application;

[0035] Figure 11 A first gear shifting mechanism of a power system of a hybrid electric vehicle is shown in a pure electric mode circuit schematic diagram when the first gear shifting mechanism is arranged on an output shaft according to an embodiment of the present application;

[0036] Figure 12A line schematic view of a series range extending mode when a first gear shifting mechanism of a power system of a hybrid electric vehicle is arranged on an output shaft according to an embodiment of the present application is shown;

[0037] Figure 13 A line schematic view of a parking charging mode when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown;

[0038] Figure 14 A line schematic view of a driving charging mode when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown;

[0039] Figure 15 A line schematic view of an engine direct drive mode when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown;

[0040] Figure 16 A line schematic view of a parallel driving mode when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown;

[0041] Figure 17 A line schematic view of a brake energy recovery when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown;

[0042] Figure 18 A schematic view of a double gear structure when the first gear shifting mechanism of the power system of the hybrid electric vehicle is arranged on the output shaft according to an embodiment of the present application is shown.

[0043] BRIEF DESCRIPTION OF REFERENCE NUMERALS:

[0044] 1, input shaft; 2, output shaft; 3, first gear set; 31, first driving gear; 32, first driven gear; 4, second gear set; 41, second driving gear; 411, first transmission gear; 412, second transmission gear; 42, second driven gear; 5, third gear set; 51, third driving gear; 52, third driven gear; 6, first gear shifting mechanism; 7, second gear shifting mechanism; 8, third gear shifting mechanism; 9, engine; 10, clutch; 11, first motor; 12, second motor; 13, battery pack; 14, first driving transmission gear; 15, first driven transmission gear; 16, second driving transmission gear; 17, third driving transmission gear; 18, third driven transmission gear.

[0045] 19, first pure electric transmission line; 20, second pure electric transmission line; 21, series range extending transmission line; 22, series range extending charging line; 23, parking charging line; 24, driving charging line; 25, driving transmission line; 26, engine direct drive transmission line; 27, first parallel drive transmission line; 28, second parallel drive transmission line; 29, third parallel drive transmission line; 30, first brake energy recovery line; 31, second brake energy recovery line. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application will be fully conveyed to those skilled in the art.

[0047] As shown in Figure 1 and Figure 10 The power system of the hybrid electric vehicle comprises:

[0048] an input shaft 1, an output shaft 2, a first gear set 3, a second gear set 4, and a third gear set 5;

[0049] a first gear shifting mechanism 6, the input of the first gear set 3 and the input of the third gear set 5 are connected to the input shaft 1 through the first gear shifting mechanism 6, or the output of the first gear set 3 and the output of the third gear set 4 are connected to the output shaft 2, or the input of the first gear set 3 and the input of the third gear set 5 are connected to the input shaft 1, and the output of the first gear set 3 and the output of the third gear set 5 are connected to the output shaft 2 through the first gear shifting mechanism 6;

[0050] a second gear shifting mechanism 7, the input shaft 1 is connected to the input of the second gear set 4 through the second gear shifting mechanism 7;

[0051] a third gear shifting mechanism 8, the output shaft 2 is connected to the output of the second gear set 4 through the third gear shifting mechanism 8;

[0052] an engine 9 and a clutch 10, the output end of the engine 9 is connected to the input shaft 1 through the clutch 10;

[0053] a first motor 11 and a second motor 12, the output end of the first motor 11 is connected to the input shaft 1, and the output end of the second motor 12 is connected to the second gear set 4;

[0054] a battery pack 13, the first motor 11 and the second motor 12 are electrically connected to the battery pack 13.

[0055] Specifically, to solve the problems of high cost, large power loss and single operation mode in high-speed cruising stage of the existing power system of hybrid electric vehicle, the utility model provides a kind of power system of hybrid electric vehicle, the input portion of the first gear group 3 of the power system and the input portion of the third gear group 5 are connected with input shaft 1 through first shift mechanism 6, the output portion of the first gear group 3 and the output portion of the third gear group 5 are connected with output shaft 2, input shaft 1 is connected with the input portion of the second gear group 4 through second shift mechanism 7, and output shaft 2 is connected with the output portion of the second gear group 4 through third shift mechanism 8, or the input portion of the first gear group 3 and the input portion of the third gear group 5 are connected with input shaft 1, and the output portion of the first gear group 3 and the output portion of the third gear group 5 are connected with input shaft 1 through first shift mechanism 6;The first shift mechanism 6, the second shift mechanism 7 and the third shift mechanism 8 of the power system replace the original double clutch component, adjust the power transmission strategy, thereby improving the working mode of the power system of hybrid electric vehicle, and optimizing the power economy and shift smoothness.

[0056] When the input portion of the first gear group 3 and the input portion of the third gear group 5 of the power system are connected with input shaft 1 through first shift mechanism 6, multiple working modes are realized.

[0057] When the output portion of the first gear group 3 and the output portion of the third gear group 5 of the power system are connected with output shaft 2 through first shift mechanism 6, multiple working modes are also realized.

[0058] Preferably, the first gear group 3 includes a first driving gear 31 and a first driven gear 32, the first driving gear 31 is the input portion of the first gear group 3, the first driven gear 32 is the output portion of the first gear group 3, and the first driving gear 31 and the first driven gear 32 are meshed and connected.

[0059] Specifically, when the first shift mechanism 6 is actuated, the first driving gear 31 is disconnected or connected with input shaft 1, or the first driven gear 32 is disconnected or connected with output shaft 2.

[0060] Preferably, the second gear group 4 includes a second driving gear 41 and a second driven gear 42, the second driving gear 41 is the input portion of the second gear group 4, the second driven gear 42 is the output portion of the second gear group 4, and the second driving gear 41 and the second driven gear 42 are meshed and connected.

[0061] Specifically, when the second shift mechanism 7 is actuated, the second driving gear 41 is disconnected or connected with the input shaft 1.

[0062] Preferably, the third gear set 5 comprises a third driving gear 51 and a third driven gear 52, the third driving gear 51 is the input of the third gear set 5, the third driven gear 52 is the output of the third gear set 5, and the third driving gear 51 and the third driven gear 52 are meshed.

[0063] Specifically, when the first shift mechanism 6 is actuated, the third driving gear 51 is disconnected or connected with the input shaft 1, or the third driven gear 52 is disconnected or connected with the output shaft 2.

[0064] Preferably, the first motor 11 is arranged on one side of the input shaft 1, and the power system of the hybrid vehicle further comprises a first driving gear 14 and a first driven gear 15, the output of the first motor 11 is connected with the first driving gear 14, the first driven gear 15 is connected with the input shaft 1, and the first driving gear 14 and the first driven gear 15 are meshed.

[0065] Specifically, the first motor 11 can increase the speed ratio and the output torque through the first driving gear 14 and the first driven gear 15, and the first motor 11 is arranged on one side of the input shaft 1, so as to shorten the axial length of the power system and save installation space.

[0066] Preferably, the second motor 12 is arranged on one side of the input shaft 1, and the power system of the hybrid vehicle further comprises a second driving gear 16, the output of the second motor 12 is meshed with the second driving gear 16, and the second driving gear 16 is meshed with the second driving gear 41.

[0067] Specifically, the second motor 12 is arranged on one side of the input shaft 1, so as to shorten the axial length of the power system and save installation space.

[0068] Preferably, the power system of the hybrid vehicle further comprises a third driving gear 17 and a third driven gear 18, the third driving gear 17 is connected with the output shaft 2, and the third driven gear 18 is connected with the wheel assembly 19 of the vehicle.

[0069] Specifically, the third driving gear 17 and the third driven gear 18 are used to realize the connection between the output shaft 2 and the wheel assembly 19.

[0070] Preferably, the second driving gear 41 is a single gear or a double gear.

[0071] Specifically, the second drive gear 41 is replaced by a double gear, which can increase the speed ratio of the second motor 12 and the output shaft 2, thereby increasing the output torque.

[0072] As shown in Figure 9 and Figure 18 Preferably, the double gear includes a first transmission gear 411 and a second transmission gear 412, the first transmission gear 411 and the second transmission gear 412 are coaxially connected, the first transmission gear 411 is in meshing connection with the second drive gear 16, and the second transmission gear 412 is in meshing connection with the second driven gear 42.

[0073] A hybrid vehicle includes a power system of the hybrid vehicle.

[0074] Embodiment 1

[0075] The input part of the first gear set 3 and the input part of the third drive gear set 5 are connected with the input shaft 1 through the first shift mechanism 6, realizing multiple working modes, of which nine working modes are listed as follows, which specifically include:

[0076] As shown in Figure 2 , the pure electric mode is two kinds:

[0077] The first kind is that the third shift mechanism 8 is shifted to engage the second driven gear 42 with the output shaft 2, the second motor 12 is driven by pure electricity, and the power transmission line is the first pure electric transmission line 19 as shown in Figure 2 .

[0078] The second kind is that the first shift mechanism 6 is shifted to engage the third drive gear 51 with the input shaft 1, the third shift mechanism 8 is shifted to engage the second driven gear 42 with the output shaft 2, the first motor 11 and the second motor 12 are driven by pure electricity in parallel, and the power transmission line is the first pure electric transmission line 19 and the second pure electric transmission line 20 as shown in Figure 2 .

[0079] As shown in Figure 3 , the series extension mode is one kind:

[0080] The clutch 10 is engaged, the first motor 11 acts as a generator, the first motor 11 is connected with the engine 9 to charge the battery pack 13, the third shift mechanism 8 is shifted to engage the second driven gear 42 with the output shaft 2, and the second motor 12 is driven alone, and the power transmission line is the series extension transmission line 21 as shown in Figure 3 , and the charging line is the series extension charging line 22 as shown in Figure 3 .

[0081] As shown in Figure 4 , the parking charging mode is one kind:

[0082] When the vehicle is in parking and charging mode, the vehicle speed is 0, clutch 10 is engaged, and engine 9 and first motor 11 combine to form a charging system to charge battery pack 13. The charging circuit is as follows: Figure 4 Parking charging line 23 in the middle.

[0083] like Figure 5 As shown, there is one charging mode while driving:

[0084] When the vehicle is charging, it can drive normally. The vehicle's drive can come from the engine 9, the second motor 12, or both in parallel. Simultaneously, the engine 9 and the first motor 11 combine to form a charging system to charge the battery pack 13. Preferably, the clutch 10 engages, and the first shift mechanism 6 shifts to the third active gear 51, which engages with the input shaft 1. The charging circuit is as follows... Figure 5 The vehicle charging line 24 in the middle, the power transmission line is as follows Figure 5 The vehicle transmission line 25 in the middle.

[0085] like Figure 6 As shown, there is one type of engine direct drive mode:

[0086] When the engine is in direct drive mode, because the first motor is in position P2, the clutch 10 must be engaged, and the first shift mechanism 6 must be shifted to engage the third active gear 51 with the input shaft 1. At this time, the engine 9 and the first motor 11 are coaxially connected. This operating mode is generally for high-speed cruising, and power is usually output through the third gear set 5. The power transmission circuit is as follows: Figure 6 The engine direct drive transmission line 26 in the middle.

[0087] like Figure 7 As shown, there are three parallel drive modes:

[0088] The first method involves the clutch 10 engaging, the first shifting mechanism 6 shifting to the third active gear 51, which engages with the input shaft 1. The engine 9 and the first motor 11 are driven in parallel, with the first motor 11 providing electric output. The power transmission circuit is as follows: Figure 7 The first parallel drive transmission line 27 and the second parallel drive transmission line 28 in the middle;

[0089] The second method involves clutch 10 engaging, first shift mechanism 6 shifting to the third driving gear 51 engaging with input shaft 1, and third shift mechanism 8 shifting to the second driven gear 42 engaging with output shaft 2. Engine 9 and second motor 12 are driven in parallel, with the second motor 12 providing electric output. The power transmission circuit is as follows: Figure 7 The first parallel drive transmission line 27 and the third parallel drive transmission line 29 in the middle;

[0090] The third is that the clutch 10 is engaged, the first shift mechanism 6 is shifted to the third driving gear 51 combined with the input shaft 1, the third shift mechanism 8 is shifted to the second driven gear 42 combined with the output shaft 2, the engine 9, the first motor 11 and the second motor 12 are three powers in parallel driving, driving the first motor 11 and the second motor 12 electrically output, and the power transmission line is as shown in the first parallel driving transmission line 27, the second parallel driving transmission line 28 and the third parallel driving transmission line 29 in FIG. Figure 7 .

[0091] As shown in FIG. Figure 8 , in addition to a plurality of working modes, a plurality of brake energy recovery functions are also included, and two brake energy recovery functions are listed as follows:

[0092] The first is single motor brake energy recovery, low speed braking, the second motor 12 applies a power generation negative torque to charge the battery pack 13, and the brake energy recovery line is as shown in the first brake energy recovery line 30 in FIG. Figure 8 .

[0093] The second is double motor energy recovery, high speed braking, the braking force is large, the first motor 11 and the second motor 12 jointly apply a power generation negative torque to charge the battery pack 13 respectively, and the brake energy recovery line is as shown in the first brake energy recovery line 30 and the second brake energy recovery line 31 in FIG. Figure 8 .

[0094] Embodiment 2

[0095] The output part of the first gear set 3 and the output part of the third gear set 5 are connected with the output shaft 2 through the first shift mechanism 6, realizing a plurality of working modes, and nine working modes are listed as follows, which specifically include:

[0096] As shown in FIG. Figure 11 , there are two pure electric modes:

[0097] The first is that the third shift mechanism 8 is shifted to the second driven gear 42 combined with the output shaft 2, the second motor 12 is pure electric driving, and the power transmission line is as shown in the first pure electric transmission line 19 in FIG. Figure 11 .

[0098] The second is that the first shift mechanism 6 is shifted to the third driven gear 52 combined with the output shaft 2, the third shift mechanism 8 is shifted to the second driven gear 42 combined with the output shaft 2, the first motor 11 and the second motor 12 are parallel pure electric driving, and the power transmission line is as shown in the first pure electric transmission line 19 and the second pure electric transmission line 20 in FIG. Figure 11 .

[0099] As shown in FIG. Figure 12 , there is one series range increasing mode:

[0100] Clutch 10 is engaged, first motor 11 acts as a generator, first motor 11 is connected with engine 9, charges battery pack 13, third gear shift mechanism 8 is shifted to the second driven gear 42 engaged with output shaft 2, second motor 12 is driven alone, power transmission line is as shown in Figure 3 , series extended transmission line 21, charging line is as shown in Figure 12 , series extended charging line 22.

[0101] As shown in Figure 13 , parking charging mode 1:

[0102] Parking charging state, the vehicle speed is 0, clutch 10 is engaged, engine 9 and first motor 11 are combined into a charging system, charging battery pack 13, charging line is as shown in Figure 13 , parking charging line 23.

[0103] As shown in Figure 14 , driving charging mode 1:

[0104] Driving charging state, the vehicle is normally driven, the driving of the vehicle can come from engine 9, second motor 12 or both simultaneously in parallel driving, at the same time, engine 9 and first motor 11 are combined into a charging system, charging battery pack 13, preferably clutch 10 is engaged, first gear shift mechanism 6 is shifted to the third driven gear 52 engaged with output shaft 2, charging line is as shown in Figure 14 , driving charging line 24, power transmission line is as shown in Figure 5 , driving transmission line 25.

[0105] As shown in Figure 15 , engine direct drive mode 1:

[0106] Engine direct drive, because the first motor is in P2 position, clutch 10 must be engaged, and first gear shift mechanism 6 is shifted to the third driven gear 52 engaged with output shaft 2, at this time, engine 9 and first motor 11 are coaxially connected, this working mode is generally high-speed cruising condition, usually through the third gear set 5 to output power, power transmission line is as shown in Figure 15 , engine direct drive transmission line 26.

[0107] As shown in Figure 16 , parallel driving mode 3:

[0108] The first is that clutch 10 is engaged, first gear shift mechanism 6 is shifted to the third driven gear 52 engaged with output shaft 2, engine 9 and first motor 11 are driven in parallel, drive first motor 11 electric output, power transmission line is as shown in Figure 16 , first parallel driving transmission line 27 and second parallel driving transmission line 28;

[0109] The second is that the clutch 10 is engaged, the first shift mechanism 6 is shifted to the third driven gear 52 combined with the output shaft 2, the third shift mechanism 8 is shifted to the second driven gear 42 combined with the output shaft 2, the engine 9 and the second motor 12 are driven in parallel, the second motor 12 is driven to output electricity, and the power transmission line is as shown in the first parallel driving transmission line 27 and the third parallel driving transmission line 29 in the following figure: Figure 16

[0110] The third is that the clutch 10 is engaged, the first shift mechanism 6 is shifted to the third driven gear 52 combined with the output shaft 2, the third shift mechanism 8 is shifted to the second driven gear 42 combined with the output shaft 2, the engine 9, the first motor 11 and the second motor 12 are driven in parallel, the first motor 11 and the second motor 12 are driven to output electricity, and the power transmission line is as shown in the first parallel driving transmission line 27, the first parallel driving transmission line 28 and the third parallel driving transmission line 29 in the following figure: Figure 16

[0111] As shown in the following figure: Figure 17 In addition to the multiple working modes, the brake energy recovery function is also included, and two brake energy recovery functions are listed as follows:

[0112] The first is single motor brake energy recovery, low speed braking, the second motor 12 applies a power generation negative torque to charge the power battery pack 13, and the brake energy recovery line is as shown in the first brake energy recovery line 30 in the following figure: Figure 17

[0113] The second is double motor energy recovery, high speed braking, the braking force is large, the first motor 11 and the second motor 12 jointly apply a power generation negative torque to charge the battery pack 13 respectively, and the brake energy recovery line is as shown in the first brake energy recovery line 30 and the second brake energy recovery line 31 in the following figure: Figure 17

[0114] In summary, when the power system of the hybrid electric vehicle of the utility model is implemented on the hybrid electric vehicle, the power of the engine 9, the first motor 11 and the second motor 12 can be output to the wheel assembly 19 through the first gear set 3, the second gear set 4 and the third gear set 5 respectively by controlling the gearbox.

[0115] ​​​​When the first shift mechanism 6 is arranged on the input shaft 1, the engine 9 is hard connected with the input shaft 1; the input shaft 1 is hard connected with the first driving gear 31, the second driving gear 41 and the third driving gear 51; the input shaft 1 is always engaged with the first driven gear 15, the first shift mechanism 6 and the second shift mechanism 7; the output shaft 2 is hard connected with the second driven gear 42; the output shaft 2 is always engaged with the first driven gear 32, the third driven gear 52 and the third shift mechanism 8; the second driving gear 16 on the second motor 12 is always engaged with the second driving gear 41; the first driving gear 31 and the third driving gear 51 are engaged with or disconnected from the input shaft 1 by shifting the first shift mechanism 6; the second driving gear 42 is engaged with or disconnected from the input shaft 1 by shifting the second shift mechanism 7; the second driven gear 42 is engaged with or disconnected from the output shaft 2 by shifting the third shift mechanism 8; the output shaft 2 is always engaged with the driving wheel of the wheel assembly 19.

[0116] When the first shift mechanism 6 is arranged on the output shaft 2, the engine 9 is hard connected with the input shaft 1; the input shaft 1 is hard connected with the second driving gear 41; the input shaft 1 is always engaged with the first driving gear 31, the first driving gear 31, the third driving gear 51 and the second shift mechanism 7; the output shaft 2 is hard connected with the first driven gear 32, the second driven gear 42 and the third driven gear 52, and the output shaft 2 is always engaged with the first shift mechanism 6 and the third shift mechanism 8; the second driving gear 16 on the second motor 12 is always engaged with the second driving gear 41; the first driven gear 32 and the third driven gear 52 are engaged with or disconnected from the output shaft 2 by shifting the first shift mechanism 6; the second driving gear 41 is engaged with or disconnected from the input shaft 1 by shifting the second shift mechanism 7; the second driven gear 42 is engaged with or disconnected from the output shaft 2 by shifting the third shift mechanism 8; the output shaft 2 is always engaged with the driving wheel of the wheel assembly 19.

[0117] The above has described the embodiments of the present application, the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A power system of a hybrid vehicle, characterized by comprising: The power system comprises: an input shaft, an output shaft, a first gear set, a second gear set and a third gear set; a first shift mechanism, the input part of the first gear set and the input part of the third gear set are connected with the input shaft through the first shift mechanism, the output part of the first gear set and the output part of the third gear set are connected with the output shaft, or the input part of the first gear set and the input part of the third gear set are connected with the input shaft, the output part of the first gear set and the output part of the third gear set are connected with the output shaft through the first shift mechanism; a second shift mechanism, the input shaft is connected with the input part of the second gear set through the second shift mechanism; a third shift mechanism, the output shaft is connected with the output part of the second gear set through the third shift mechanism; an engine and a clutch, the output end of the engine is connected with the input shaft through the clutch; a first motor and a second motor, the output end of the first motor is connected with the input shaft, the output end of the second motor is connected with the second gear set; a battery pack, the first motor and the second motor are electrically connected with the battery pack.

2. The powertrain system of claim 1, wherein, The first gear set comprises a first driving gear and a first driven gear, the first driving gear is the input part of the first gear set, the first driven gear is the output part of the first gear set, and the first driving gear and the first driven gear are meshed and connected.

3. The powertrain system of claim 1, wherein The second gear set comprises a second driving gear and a second driven gear, the second driving gear is the input part of the second gear set, the second driven gear is the output part of the second gear set, and the second driving gear and the second driven gear are meshed and connected.

4. The powertrain system of claim 1, wherein The third gear set comprises a third driving gear and a third driven gear, the third driving gear is the input part of the third gear set, the third driven gear is the output part of the third gear set, and the third driving gear and the third driven gear are meshed and connected.

5. The powertrain system of claim 1, wherein The first motor is arranged on one side of the input shaft, and the power system of the hybrid electric vehicle further comprises a first driving gear and a first driven gear, the output end of the first motor is connected with the first driving gear, the first driven gear is connected with the input shaft, and the first driving gear and the first driven gear are meshed and connected.

6. The powertrain system of claim 3, wherein The second motor is arranged on one side of the input shaft, and the power system of the hybrid electric vehicle further comprises a second driving gear, the output end of the second motor is meshed and connected with the second driving gear, and the second driving gear is meshed and connected with the second driving gear.

7. The powertrain system of claim 1, wherein The power system of the hybrid electric vehicle further comprises a third driving gear and a third driven gear, the third driving gear is connected with the output shaft, and the third driven gear is connected with the wheel assembly of the vehicle.

8. The powertrain system of claim 6, wherein, The second driving gear is a single gear or a double gear.

9. The powertrain system of claim 8, wherein, The double gear comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are coaxially connected, the first transmission gear is in meshing connection with the second driving gear, and the second transmission gear is in meshing connection with the second driven gear.

10. A hybrid vehicle characterized by comprising: A power system of a hybrid vehicle comprising a power system according to any one of claims 1-9.

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