CN203906682U - Power transmission system for hybrid power automobile - Google Patents

Abstract

The utility model provides a power transmission system of a hybrid electric vehicle, which comprises a motor, an engine, a first shaft and a second shaft arranged in parallel, the first shaft is connected with the engine through a clutch, and the second shaft is connected with the engine through an electronic clutch. The electric motor is connected, and the first shaft constant mesh gear, the sixth-speed driven gear of the first shaft, the fifth- and sixth-speed synchronizer, the fifth-speed driven gear of the first shaft, and the fourth Gear driven gear, synchronizer for third and fourth gears on the first shaft, third gear driven gear on the first shaft, motor driven gear, motor driving gear arranged in sequence on the second shaft away from the motor, third gear driving gear on the second shaft Gears, second shaft fourth gear driving gear, second shaft fifth gear driving gear, second shaft sixth gear driving gear, second shaft constant mesh gear. The utility model omits the first gear, the second gear and the reverse gear, reduces the space modification of the transmission, and effectively saves the cost.

Description

HEV Powertrain

technical field

The invention relates to an automobile transmission system, in particular to a hybrid electric vehicle power transmission system.

Background technique

In recent years, due to the shortage of energy sources and the enhancement of public awareness of environmental protection, safety, energy saving and environmental protection have become the themes of today's automobile development. Due to technical constraints, it is difficult to fully promote environmentally friendly electric vehicles or fuel cell vehicles in a short period of time, so technically more mature hybrid vehicles are currently an ideal choice.

In the existing hybrid technology, most of the drive devices of hybrid electric vehicles using planetary gear trains are very complicated in structure, difficult to process and assemble, and cannot meet the multi-gear requirements of vehicles on complex road surfaces. The functions it can realize are not directly proportional to the technology and cost input of development and production, so it cannot be applied to automobiles in terms of structure or production.

Chinese invention patent application CN102328573A discloses a hybrid power transmission system based on a planetary gear train, including an engine, a sun gear, a planetary gear, a planet carrier, a ring gear, a generator, and an electric motor. Although because the power output of the invention directly adopts gear meshing, the reliability of the transmission is improved and the stability is high. However, it only has one set of planetary gear trains, which cannot meet the requirements of multi-gears in multi-working conditions. Moreover, it has a large change to the traditional transmission, which increases the cost of research and development.

Contents of the invention

In order to solve the deficiencies of the prior art, the utility model provides a power transmission system of a hybrid electric vehicle, which saves the first gear, the second gear and the reverse gear while minimizing the modification of the original transmission, and reduces the number of gears in the transmission. Space, but also effectively save the cost of modification.

The power transmission system of a hybrid electric vehicle includes an electric motor, an engine, a first shaft and a second shaft arranged in parallel, the first shaft is connected to the engine through a clutch, the second shaft is connected to the motor through an electronic clutch, and the first shaft The constant mesh gear of the first shaft, the sixth-speed driven gear of the first shaft, the fifth- and sixth-speed synchronizer, the fifth-speed driven gear of the first shaft, the fourth-speed driven gear of the first shaft, and the first Shaft 3rd and 4th gear synchronizer, 1st shaft 3rd gear driven gear, motor driven gear, motor driving gear set in sequence away from the motor on the 2nd shaft, 2nd shaft 3rd gear driving gear, 2nd shaft 4th gear The driving gear, the fifth-speed driving gear of the second shaft, the sixth-speed driving gear of the second shaft, the constant meshing gear of the second shaft, the constant meshing gear of the first shaft, the sixth-speed driven gear of the first shaft, the fifth- and sixth-speed synchronizers, The fifth-speed driven gear of the first shaft, the fourth-speed driven gear of the first shaft, the third-fourth gear synchronizer of the first shaft, the third-speed driven gear of the first shaft, and the driven gear of the motor are respectively connected with the driving gear of the motor and the third gear of the second shaft. Gear driving gear, second shaft fourth gear driving gear, second shaft fifth gear driving gear, second shaft sixth gear driving gear, second shaft constant mesh gear meshing.

Preferably, the motor is arranged coaxially with the second shaft.

The technical solution described in the utility model has the following beneficial effects:

1. Using the electric motor as the power device in the starting gear can save the first gear, second gear and reverse gear, and directly transmit the power output by the motor to the differential through the first shaft, reducing the space for parts.

2. The gear structure of the third, fourth, fifth and sixth gears of the original transmission is retained, and the structural change is small, saving the cost of modification.

3. Due to the cancellation of the reverse gear, the original three-shaft structure is changed to a two-shaft structure, which saves the space of the transmission and ensures the convenience of the vehicle layout.

Description of drawings

Fig. 1 is a structural diagram of a power transmission system of a hybrid electric vehicle according to the present invention.

In the picture:

1-First shaft constant mesh gear, 2-First shaft sixth gear driven gear, 3-Five and sixth gear synchronizer, 4-First shaft fifth gear driven gear, 5-First shaft fourth gear driven gear, 6-first shaft third and fourth gear synchronizer, 7-first shaft third gear driven gear, 8-motor driven gear, 9-first shaft, 10-clutch, 11-second shaft, 12-second shaft Constant meshing gear, 13-second shaft sixth-speed driving gear, 14-second shaft fifth-speed driving gear, 15-second second shaft fourth-speed driving gear, 16-second shaft third-speed driving gear, 17-motor driving gear, 18 - Electronic clutch.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

As shown in Figure 1, the hybrid electric vehicle power transmission system described in the utility model includes a motor, an engine, a first shaft 9 and a second shaft 11 arranged in parallel, and the first shaft 9 is connected with the engine through a clutch 10, The second shaft 11 is connected to the motor through an electronic clutch 18, and the first shaft constant mesh gear 1, the first shaft sixth-speed driven gear 2, and the fifth- and sixth-speed synchronizers are sequentially arranged on the first shaft 9 in the direction away from the engine 3. The first shaft fifth gear driven gear 4, the first shaft fourth gear driven gear 5, the first shaft third and fourth gear synchronizer 6, the first shaft third gear driven gear 7, and the motor driven gear 8. The motor driving gear 17, the third gear driving gear 16 of the second shaft, the fourth gear driving gear 15 of the second shaft, the fifth gear driving gear 14 of the second shaft, the sixth gear driving gear of the second shaft, and the driving gear 17 of the second shaft arranged in sequence away from the motor direction on the second shaft 11 13. The second shaft constant meshing gear 12, the first shaft constant meshing gear 1, the first shaft sixth gear driven gear 2, the fifth and sixth gear synchronizer 3, the first shaft fifth gear driven gear 4, the first shaft The fourth-speed driven gear 5, the first shaft third and fourth-speed synchronizer 6, the first shaft third-speed driven gear 7, the motor driven gear 8 are respectively connected with the motor driving gear 17, the second shaft third-speed driving gear 16, the second Axis four-speed driving gear 15, second shaft five-speed driving gear 14, second shaft six-speed driving gear 13, and second shaft constant meshing gear 12 mesh.

The utility model completely cancels the original first-gear gear and second-gear gear, and uses the electric motor as the power device when the vehicle starts. In terms of specific structure, the output end of the motor is equipped with an electronic clutch 18 controlled by the ECU to automatically control the power on and off of the motor. The power output by the motor passes through the driving gear 17 of the motor, the driven gear 8 of the motor, and finally the torque is output by the first shaft 9 .

In the case of starting and low speed, driving in pure electric mode, the ECU controls the electronic clutch 18 to be in a combined state, that is, the electric motor provides the driving force, and the power is transmitted from the motor rotor, through the motor driving gear 17 and the motor driven gear 8 to the The output shaft, and ultimately drives the wheels to turn.

When reversing, only the electric motor needs to be reversed, and its power transmission route is the same as that of low-speed starting, so the use of reverse gear is omitted, and the cost and size of the entire transmission are reduced.

When driving at high speed, the pure engine mode is used. At this time, the ECU controls the clutch to be in a disconnected state, and only the engine provides power. Taking the fifth gear as an example, the power of the engine passes through the clutch 10, the first shaft constant mesh gear 1, the The two-axis constant meshing gear 12 is transmitted to the fifth-speed driven gear 4 of the first shaft through the fifth-speed driving gear 14 of the second shaft, and is transmitted to the first shaft 9 through the fifth- and sixth-speed synchronizer 3, and is transferred by the first shaft 9 torque output.

When accelerating rapidly, or the maximum torque of the engine cannot meet the requirements of the current working conditions, the engine and the electric motor provide power at the same time. Taking the third gear as an example, the specific description is as follows: the engine starts, the clutch 10 is combined, the power is passed by the engine through the clutch 10, the first shaft constant mesh gear 1, the second shaft constant mesh gear 12, the second shaft third gear driving gear 16, and the second shaft constant mesh gear 16. One shaft third gear driven gear 7, and then the power is transmitted to the first shaft 9 through the third and fourth gear synchronizer 6 for output. At the same time, the ECU controls the electronic clutch 18 to be in the engaged state, and the electric motor continues to provide power according to the pure electric mode, and the two powers are coupled on the first shaft 9 for output.

In the case of braking, the clutch 10 is in the disconnected state, the engine is not working, and the ECU controls the electronic clutch 18 to be in the engaged state. At this time, the motor is in the state of generating electricity, and the kinetic energy is transmitted from the first shaft 9 to the driven gear 8 of the motor. The driving gear of the motor 17, drive the motor to generate electricity by the motor driving gear 17.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (2)

1. hybrid electric vehicle power transmission system, comprises motor, motor, the first axle (9) be arrangeding in parallel, the second axle (11), described the first axle (9) is connected with motor by clutch (10), described the second axle (11) is connected with motor by electric clutch (18), the first axle constant mesh gear (1) setting gradually on the first axle (9) is gone up away from motor direction, the first six grades, axle driven gear (2), five or six grades of synchronizers (3), the first five grades, axle driven gear (4), the first axle fourth gear driven gear (5), the first axle three fourth gear synchronizers (6), the first axle third gear driven gear (7), motor driven gear (8), the motor driving gear (17) setting gradually on the second axle (11) is gone up away from motor direction, the second axle third speed drive gear (16), the second axle fourth gear driving gear (15), the second five grades, axle driving gear (14), the second six grades, axle driving gear (13), the second axle constant mesh gear (12), described the first axle constant mesh gear (1), the first six grades, axle driven gear (2), five or six grades of synchronizers (3), the first five grades, axle driven gear (4), the first axle fourth gear driven gear (5), the first axle three fourth gear synchronizers (6), the first axle third gear driven gear (7), motor driven gear (8) respectively with motor driving gear (17), the second axle third speed drive gear (16), the second axle fourth gear driving gear (15), the second five grades, axle driving gear (14), the second six grades, axle driving gear (13), the second axle constant mesh gear (12) engagement.

2. hybrid electric vehicle power transmission system according to claim 1, is characterized in that, described motor and the second axle (11) coaxially arrange.