A plug-in hybrid system

Abstract

The present invention discloses a plug-in hybrid power system. A plug-in hybrid power system includes: a first power mechanism, a second power mechanism and a transmission shaft system. The first power mechanism is an engine power mechanism, and the motor driven gear of the second power mechanism is loosely mounted on the first intermediate shaft of the transmission shaft system, and can be selected by the synchronizer on the first intermediate shaft to output the power of the drive motor via the motor shaft, the motor driving gear, the motor driven gear, and the first intermediate shaft. The drive motor realizes power drive in the first gear or reverse gear. A plug-in hybrid power system of the present invention solves the problem of a narrow engine efficient working area caused by a large transmission ratio between the first gear and the second gear, and at the same time has a simple structure and improves the smoothness of gear shifting.

Description

Technical Field

[0001] The invention relates to a hybrid power system, in particular to a plug-in hybrid power system. Background Art

[0002] The plug-in hybrid system of a hybrid vehicle has a drive motor arranged between the clutch and the power input, which means that the drive motor is inserted into the transmission on the basis of DCT. It should usually have functions such as power mode switching and matching the engine with the drive motor. The plug-in hybrid system of the prior art has a certain difference in transmission ratios between multiple gears to match, especially the large difference in transmission ratio between the first gear and the second gear. In the gear arrangement, considering the large transmission ratio between the first gear and the second gear, it is difficult to design the transmission ratio range of the highest and lowest gears too large, resulting in a narrow efficient working area of ​​the engine; at the same time, it is necessary to arrange the first gear and reverse gear transmission gears, and the reverse gear is often close to the first gear transmission ratio, which brings certain difficulties to the arrangement plan, and often needs to sacrifice cost and power to meet the performance requirements of the whole vehicle. Summary of the invention

[0003] The present invention discloses a plug-in hybrid power system, which solves the problem of a narrow engine efficient working area caused by a large transmission ratio between the first gear and the second gear, and has a simple structure and improves the smoothness of gear shifting.

[0004] The present invention also discloses a car using a plug-in hybrid power system, which solves the problem of a narrow engine efficient working area caused by a large transmission ratio between the first gear and the second gear, and has a simple structure and improves the smoothness of gear shifting.

[0005] A plug-in hybrid power system disclosed in the present invention comprises: a first power mechanism, a second power mechanism and a transmission shaft system;

[0006] The first power mechanism includes an engine and a crankshaft driven by the engine;

[0007] The second power mechanism comprises a driving motor, a motor shaft, a motor driving gear and a motor passive gear meshing with the motor driving gear;

[0008] The transmission shaft system includes a first clutch, a second clutch, an outer input shaft, an inner input shaft, a first intermediate shaft and a second intermediate shaft; the first clutch is fixedly connected to the inner input shaft; the second clutch is fixedly connected to the outer input shaft, and the outer input shaft is sleeved outside the inner input shaft;

[0009] The crankshaft inputs the power of the engine into the inner input shaft and the outer input shaft respectively through the first clutch and the second clutch;

[0010] Driving gears are arranged on the outer input shaft and the inner input shaft, and the driving gears are correspondingly meshed with the driven gears on the first intermediate shaft and the second intermediate shaft;

[0011] The motor driven gear of the second power mechanism is loosely mounted on the first intermediate shaft, and can be selected by the synchronizer on the first intermediate shaft to output the power of the drive motor via the motor shaft, the motor driving gear, the motor driven gear, and the first intermediate shaft; and the drive motor realizes power drive of the first gear or reverse gear.

[0012] Furthermore, the inner input shaft is fixedly connected to the fifth gear driving gear and the third gear driving gear in sequence from left to right;

[0013] The external input shaft 8 is fixed with the second and fourth gear driving gears and the sixth gear driving gear in sequence from left to right;

[0014] The first intermediate shaft is provided with a first constant meshing gear, a second gear driven gear, a second gear motor synchronizer and a motor driven gear in sequence from left to right; wherein the first constant meshing gear and the second gear motor synchronizer are fixed on the first intermediate shaft, and the second gear driven gear and the motor driven gear are loosely sleeved on the first intermediate shaft; the second gear motor synchronizer can switch to select the second gear driven gear or the motor driven gear;

[0015] The second intermediate shaft is provided with a second constant mesh gear, a fourth gear driven gear, a fourth and sixth gear synchronizer, a sixth gear driven gear, a fifth gear driven gear, a third and fifth gear synchronizer and a third gear driven gear in sequence from left to right; the second constant mesh gear, the fourth and sixth gear synchronizer and the third and fifth gear synchronizer are fixed on the second intermediate shaft; the fourth gear driven gear, the sixth gear driven gear, the fifth gear driven gear and the third gear driven gear are idle on the second intermediate shaft; the fourth and sixth gear synchronizer can switch to select a fourth gear driven gear or a sixth gear driven gear; the third and fifth gear synchronizer can switch to select a fifth gear driven gear or a third gear driven gear.

[0016] Furthermore, the fifth-speed driving gear meshes with the fifth-speed passive gear; the third-speed driving gear meshes with the third-speed passive gear;

[0017] The second and fourth gear driving gears are meshed with the second gear driven gear and the fourth gear driven gear respectively; the sixth gear driving gear is meshed with the sixth gear driven gear.

[0018] Furthermore, the outer input shaft and the inner input shaft are coaxial with the crankshaft of the engine, and the first intermediate shaft, the second intermediate shaft, the crankshaft of the engine, and the motor shaft of the drive motor are arranged in parallel and are not coaxial with each other.

[0019] Furthermore, the first clutch and the second clutch are both wet clutches.

[0020] The technical effects of the present invention are:

[0021] 1) Eliminating the first gear and reverse gear and using the drive motor directly as the first gear and reverse gear can reduce the number of first gear and reverse gear, avoiding the defect that the transmission ratio range between the first gear and the second gear makes the spatial structure difficult to arrange, while reducing costs and making the structure easier to arrange.

[0022] 2) The drive motor has the characteristic of being able to output a large torque smoothly even during the low-speed starting phase, which can make up for the shortcomings of the engine's unstable idling speed, small low-speed torque and easy stalling, making the vehicle's working performance reliable. The drive motor can output a large torque at a low speed, which can further improve the vehicle's acceleration performance from 0 to 100 km / h.

[0023] 3) The first clutch and the second clutch are wet clutches, which ensure smooth power switching between the two gears, reduce gear shift shock, and avoid gear shift power interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1 The present invention discloses a plug-in hybrid power system, comprising: a first power mechanism, a second power mechanism and a transmission shaft system.

[0027] The first power mechanism includes an engine 1 and a crankshaft 2 driven by the engine.

[0028] The second power mechanism includes a driving motor 3 , a motor shaft 4 , a motor driving gear 25 , and a motor driven gear 26 meshing with the motor driving gear 25 .

[0029] The transmission shaft system includes a first clutch 5, a second clutch 6, an outer input shaft 7, an inner input shaft 8, a first intermediate shaft 13 and a second intermediate shaft 17. The first clutch 5 is fixedly connected to the inner input shaft 8, the second clutch 6 is fixedly connected to the outer input shaft 7, and the outer input shaft 7 is sleeved outside the inner input shaft 8.

[0030] The crankshaft 2 inputs the power of the engine 1 into the inner input shaft 8 and the outer input shaft 7 through the first clutch 5 and the second clutch 6 respectively.

[0031] The inner input shaft 8 is fixedly connected to the fifth gear driving gear 9 and the third gear driving gear 10 in sequence from left to right;

[0032] The outer input shaft 7 is fixedly provided with the second and fourth gear driving gears 11 and the sixth gear driving gear 12 in sequence from left to right;

[0033] The first intermediate shaft 13 is sequentially arranged with the first constant mesh gear 14, the second gear driven gear 15, the second gear motor synchronizer 16 and the motor driven gear 26 from left to right. Among them, the first constant mesh gear 14 and the second gear motor synchronizer 16 are fixed on the first intermediate shaft 13, and the second gear driven gear 15 and the motor driven gear 26 are loosely sleeved on the first intermediate shaft. The second gear motor synchronizer 16 can switch to select the second gear driven gear 15 or the motor driven gear 26.

[0034] The second intermediate shaft 17 is sequentially arranged from left to right with a second constant mesh gear 18, a fourth gear driven gear 19, a fourth and sixth gear synchronizer 21, a sixth gear driven gear 20, a fifth gear driven gear 22, a third and fifth gear synchronizer 24, and a third gear driven gear 23. The second constant mesh gear 18, the fourth and sixth gear synchronizer 21, and the third and fifth gear synchronizer 24 are fixed on the second intermediate shaft 17. The fourth gear driven gear 19, the sixth gear driven gear 20, the fifth gear driven gear 22, and the third gear driven gear 23 are loosely mounted on the second intermediate shaft 17. The fourth and sixth gear synchronizer 21 can switch to select the fourth gear driven gear 19 or the sixth gear driven gear 20. The third and fifth gear synchronizer 24 can switch to select the fifth gear driven gear 22 or the third gear driven gear 23.

[0035] The fifth-gear driving gear 9 meshes with the fifth-gear driven gear 22 , and the third-gear driving gear 10 meshes with the third-gear driven gear 23 .

[0036] The second and fourth gear driving gears 11 mesh with the second gear driven gear 15 and the fourth gear driven gear 19 respectively, and the sixth gear driving gear 12 meshes with the sixth gear driven gear 20 .

[0037] The outer input shaft 7 and the inner input shaft 8 are coaxial with the crankshaft 2 of the engine 1 , and the first intermediate shaft 13 , the second intermediate shaft 17 , the crankshaft 2 of the engine 1 , and the motor shaft 4 of the drive motor 3 are arranged in parallel and are not coaxial with each other.

[0038] The first clutch 5 and the second clutch 6 are both wet clutches.

[0039] Here’s how it works:

[0040] 1. Power transmission route of pure electric working mode:

[0041] First gear power transmission route: the drive motor 3 is working and rotating forward, the engine 1 is not working, the first clutch 5 and the second clutch 6 are both disconnected, and the second gear motor synchronizer 16 is combined with the idle motor driven gear 26; the power is transmitted to the motor driving gear 25, the motor driven gear 26, the second gear motor synchronizer 16, the first intermediate shaft 13, the first constant mesh gear 14 in sequence through the motor shaft 4 of the drive motor 3, and finally the power is transmitted through the first constant mesh gear 14.

[0042] Reverse gear power transmission route: the drive motor 3 works and reverses, the engine 1 does not work, the first clutch 5 and the second clutch 6 are both disconnected, and the second gear motor synchronizer 16 is combined with the idle motor driven gear 26; the power is transmitted to the motor driving gear 25, the motor driven gear 26, the second gear motor synchronizer 16, the first intermediate shaft 13, the first constant mesh gear 14 in sequence through the motor shaft 4 of the drive motor 3, and finally the power is transmitted through the first constant mesh gear 14.

[0043] (II) Power transmission route in pure engine mode:

[0044] 1) Second gear power transmission route: the drive motor 3 is not working, the engine 1 is working, the first clutch 5 is disconnected, the second clutch 6 is engaged, and the second gear motor synchronizer 16 is engaged with the idle second gear driven gear 15; the power is transmitted to the second clutch 6, the external input shaft 7, the second and fourth gear driving gears 11, the second gear driven gear 15, the second gear motor synchronizer 16, the first intermediate shaft 13, the first constant mesh gear 14 in sequence through the crankshaft 2 of the engine 1, and finally the power is transmitted through the first constant mesh gear 14.

[0045] 2) Third gear power transmission route: the drive motor 3 is not working, the engine 1 is working, the first clutch 5 is engaged, the second clutch 6 is disconnected, and the third-fifth gear synchronizer 24 is engaged with the idle third-gear driven gear 23; the power is transmitted to the first clutch 5, the inner input shaft 8, the third-gear driving gear 10, the third-gear driven gear 23, the third-fifth gear synchronizer 24, the second intermediate shaft 17, the second constant mesh gear 18 in sequence through the crankshaft 2 of the engine 1, and finally the power is transmitted through the second constant mesh gear 18.

[0046] 3) Fourth gear power transmission route: the drive motor 3 is not working, the engine 1 is working, the first clutch 5 is disconnected, the second clutch 6 is engaged, and the fourth and sixth gear synchronizer 21 is engaged with the idle fourth gear driven gear 19; the power is transmitted to the second clutch 6, the external input shaft 7, the second and fourth gear driving gears 11, the fourth gear driven gear 19, the fourth and sixth gear synchronizer 21, the second intermediate shaft 17, the second constant mesh gear 18 in sequence through the crankshaft 2 of the engine 1, and finally the power is transmitted through the second constant mesh gear 18.

[0047] 4) Five-speed power transmission route: the drive motor 3 is not working, the engine 1 is working, the first clutch 5 is engaged, the second clutch 6 is disconnected, and the third-fifth gear synchronizer 24 is engaged with the idle fifth-gear driven gear 22; the power is transmitted to the first clutch 5, the inner input shaft 8, the fifth-gear driving gear 9, the fifth-gear driven gear 22, the third-fifth gear synchronizer 24, the second intermediate shaft 17, the second constant mesh gear 18 in sequence through the crankshaft 2 of the engine 1, and finally the power is transmitted through the second constant mesh gear 18.

[0048] 5) Sixth-gear power transmission route: the drive motor 3 is not working, the engine 1 is working, the first clutch 5 is disconnected, the second clutch 6 is engaged, and the fourth-sixth-gear synchronizer 21 is engaged with the idle sixth-gear driven gear 20; the power is transmitted to the second clutch 6, the external input shaft 7, the sixth-gear driving gear 12, the sixth-gear driven gear 20, the fourth-sixth-gear synchronizer 21, the second intermediate shaft 17, the second constant mesh gear 18 in sequence through the crankshaft 2 of the engine 1, and finally the power is transmitted through the second constant mesh gear 18.

[0049] (III) Hybrid power transmission route:

[0050] The powertrain has a hybrid power mode only in the third, fourth, fifth and sixth gears. In this mode, there is power from both the engine 1 and the drive motor 3. In the four gears listed in this mode, the power transmission route of the engine 1 is the same as that of the pure engine mode. The second-gear motor synchronizer 16 is combined with the idle motor driven gear 26, and the power transmission route of the drive motor 3 is the same, which is transmitted in sequence through the motor shaft 4 to the motor driving gear 25, the motor driven gear 26, the second-gear motor synchronizer 16, the first intermediate shaft 13, and the first constant mesh gear 14, and finally the power is transmitted through the first constant mesh gear 14.

[0051] Energy recovery: When the vehicle decelerates or goes downhill, the drive motor 3 changes to the power generation state, the second-gear motor synchronizer 16 is combined with the empty motor passive gear 26, and the whole vehicle transmits power to the first constant meshing gear 14, the first intermediate shaft 13, the second-gear motor synchronizer 16, the motor passive gear 26, the motor driving gear 25, and the motor shaft 4 through the wheels. Finally, the drive motor 3 is driven by the rotation of the motor shaft 4 to generate electricity, thereby realizing energy recovery.

Claims

1. A plug-in hybrid system, characterized in that: It includes a first power mechanism, a second power mechanism and a transmission shaft system; The first power mechanism comprises an engine (1) and a crankshaft (2) driven by the engine; The second power mechanism comprises a driving motor (3), a motor shaft (4), a motor driving gear (25), and a motor driven gear (26) meshing with the motor driving gear (25); The transmission shaft system comprises a first clutch (5), a second clutch (6), an outer input shaft (7), an inner input shaft (8), a first intermediate shaft (13) and a second intermediate shaft (17); the first clutch (5) is fixedly connected to the inner input shaft (8); the second clutch (6) is fixedly connected to the outer input shaft (7), and the outer input shaft (7) is sleeved outside the inner input shaft (8); The crankshaft (2) inputs the power of the engine (1) into the inner input shaft (8) and the outer input shaft (7) respectively through the first clutch (5) and the second clutch (6); The outer input shaft (7) and the inner input shaft (8) are provided with driving gears, and the driving gears are correspondingly meshed with the driven gears on the first intermediate shaft (13) and the second intermediate shaft (17); The inner input shaft (8) is fixedly connected to the fifth gear driving gear (9) and the third gear driving gear (10) in sequence from left to right; The external input shaft (7) is fixedly provided with second and fourth gear driving gears (11) and a sixth gear driving gear (12) in sequence from left to right; The first intermediate shaft (13) is provided with a first constant mesh gear (14), a second gear driven gear (15), a second gear motor synchronizer (16) and a motor driven gear (26) in sequence from left to right; wherein the first constant mesh gear (14) and the second gear motor synchronizer (16) are fixed on the first intermediate shaft (13), and the second gear driven gear (15) and the motor driven gear (26) are loosely sleeved on the first intermediate shaft; and the second gear motor synchronizer (16) can switch to select the second gear driven gear (15) or the motor driven gear (26); The second intermediate shaft (17) is provided with a second constant mesh gear (18), a fourth gear driven gear (19), a fourth and sixth gear synchronizer (21), a sixth gear driven gear (20), a fifth gear driven gear (22), a third and fifth gear synchronizer (24) and a third gear driven gear (23) in sequence from left to right; the second constant mesh gear (18), the fourth and sixth gear synchronizer (21) and the third and fifth gear synchronizer (24) are fixed on the second intermediate shaft (17); the fourth gear driven gear (19), the sixth gear driven gear (20), the fifth gear driven gear (22) and the third gear driven gear (23) are loosely sleeved on the second intermediate shaft (17); the fourth and sixth gear synchronizer (21) can switch to select the fourth gear driven gear (19) or the sixth gear driven gear (20); the third and fifth gear synchronizer (24) can switch to select the fifth gear driven gear (22) or the third gear driven gear (23); The second and fourth gear driving gears (11) are respectively meshed with the second gear driven gear (15) and the fourth gear driven gear (19); the fifth gear driving gear (9) is meshed with the fifth gear driven gear (22); the third gear driving gear (10) is meshed with the third gear driven gear (23); and the sixth gear driving gear (12) is meshed with the sixth gear driven gear (20); The motor driven gear (26) of the second power mechanism is loosely mounted on the first intermediate shaft (13), and can be selected by the synchronizer on the first intermediate shaft to output the power of the drive motor (3) via the motor shaft (4), the motor driving gear (25), the motor driven gear (26), and the first intermediate shaft; and the drive motor (3) realizes power drive in the first gear or reverse gear.

2. A plug-in hybrid system according to claim 1, characterized in that: The outer input shaft (7) and the inner input shaft (8) are coaxial with the crankshaft (2) of the engine (1); the first intermediate shaft (13), the second intermediate shaft (17), the crankshaft (2) of the engine (1), and the motor shaft (4) of the drive motor (3) are arranged in parallel and are not coaxial with each other.

3. A plug-in hybrid system as claimed in claim 1, characterized in that: The first clutch (5) and the second clutch (6) are both wet clutches.

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