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Coaxial coupling driving system of double planetary gear systems and double motors

A technology of planetary gear train and coaxial coupling, applied in the field of double planetary gear train dual motor coaxial coupling drive system, can solve the problems of difficult optimization of efficiency, difficult use requirements, high manufacturing cost, etc., to reduce the frequency of combination and separation , realize the synchronous combination of speed and easy industrialization

Active Publication Date: 2016-12-07
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hybrid hybrid systems, such as the most representative THS (Toyota Hybrid System) of Toyota Motor Corporation, THS2 (second generation Toyota Hybrid System) hybrid system, General Motors' EP ( electric parallel), AHS2 (second-generation advanced hybrid system) system, the structure of the power synthesis mechanism is complicated, and the manufacturing cost is high
[0005] After searching the literature of the prior art, it was found that a Chinese patent with the announcement number CN201021118Y and the patent name "Parallel Hybrid Vehicle" mainly includes an engine, which is mechanically connected to an electric motor through a clutch. The electric motor is mechanically connected to a drive axle, and the engine is mechanically connected to a generator, and the engine is electrically connected to the battery pack through a power generation controller. In addition, the motor is also connected to the battery pack through a drive controller. The shortcoming is: in the pure electric drive mode, the operating point of the motor is strongly coupled with the operating point of the vehicle, and the motor speed is fixed at a certain speed, and its efficiency is difficult to optimize; in the hybrid drive mode, when the vehicle is running In the process, the optimal control of the speed regulation of the engine cannot be realized, and it is difficult to further improve the energy efficiency of the system; the motor torque is required to be large, the volume and weight of the motor are large, and the system cost is also high, otherwise the low-speed dynamic performance of the vehicle is not good. To solve this problem, a drive axle with a reduction ratio requires a higher-speed motor and has reliability risks; it is difficult to meet the requirements of different regions, making this system mainly suitable for urban vehicles

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  • Coaxial coupling driving system of double planetary gear systems and double motors
  • Coaxial coupling driving system of double planetary gear systems and double motors
  • Coaxial coupling driving system of double planetary gear systems and double motors

Examples

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Embodiment 1

[0065] like figure 1 As shown, the four-mode dual-planetary gear coaxially coupled continuously variable hybrid hybrid drive system (Embodiment 1) of the present invention includes: an engine 1, a clutch 2, a first motor 3, a first planetary gear train 4, a second A synchronizer 71, a second motor 5, a second synchronizer 72, a second planetary gear train 6, an output shaft 15, an energy storage device 11 and a motor control device 12, the first planetary gear train includes an inner ring gear, a planetary gear carrier and sun gear, the second planetary gear train includes an inner ring gear, a planet carrier and a sun gear, the engine 1 is connected with the rotor 31 of the first motor 2 through the clutch 2, and the rotor 31 of the first motor is connected with the first planetary gear The rotor 51 of the second motor is connected to the sun gear 43 of the first planetary gear train through the first synchronizer 71, and the sun gear of the second planetary gear train throug...

Embodiment 2

[0085] like Figure 5 As shown, the second embodiment (five-mode dual-planetary gear train coaxially coupled continuously variable speed hybrid hybrid drive system) is basically the same as the first embodiment, the difference is that the five-mode dual-planetary gear of the second embodiment In order to further realize the direct drive mode of the engine 1, the gear train coaxially coupled continuously variable hybrid drive system further includes a brake locking device 14, and the brake locking device 14 is used for the sun protection of the first planetary gear train 4. The wheel 43 performs control of brake lock and brake lock release, and one end of the brake lock device 14 is connected to the sun gear 43 of the planetary gear train 4 and the other end is connected to the case. The hybrid power system electronic control unit set in the second embodiment, on the basis of the hybrid power system electronic control unit described in the second embodiment, adds a control circ...

Embodiment 3

[0089] like Image 6 As shown, the third embodiment (double-mode double-planetary gear train double-motor coaxially coupled pure electric drive system) is realized by canceling the connection between the engine 1, the clutch 2, and the clutch 2 and the first motor 3 in the first example. of. With the single-motor pure electric drive mode and the dual-motor pure electric drive mode in the first embodiment, the beneficial effects are:

[0090] (1) Avoid long-term high-speed operation of the second motor 5, which can improve the reliability of the system;

[0091] (2) Through the coupling and stepless speed change of the first planetary gear train 4, the overall operating efficiency of the first motor 3 and the second motor 5 can be optimized;

[0092] (3) Due to the automatic switching of the different states of the first synchronizer 71 and the second synchronizer 72, the first motor 1 and the second motor 5 use smaller torques, and can also achieve power performance equivale...

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Abstract

The invention provides a coaxial coupling driving system of double planetary gear systems and double motors. The coaxial coupling driving system comprises the double motors, the double planetary gear systems and the like. Each planetary gear system comprises a gear ring, a planetary carrier and a sun wheel. A rotor of the first motor is connected with the gear ring of the first planetary gear system. A rotor of the second motor is connected with the sun wheel of the first planetary gear system and the sun wheel of the second planetary gear system through synchronizers correspondingly. The planetary carriers of the two planetary gear systems are connected with an output shaft. The gear ring of the second planetary gear system is connected with a shell. The output shaft is connected with the input end of a deceleration differential. The output end of the deceleration differential is connected with two wheels through two half shafts. A motor control device is connected with an energy storage device and conducts electric power transmission. The motor control device is further connected with the first motor and the second motor and outputs a control command. The coaxial coupling driving system has the characteristic that the vehicle dynamic property, the energy consumption economical efficiency, the geographical adaptability and the application adaptability are better.

Description

technical field [0001] The present invention relates to the technical field of drive systems, in particular to a double planetary gear train double motor coaxial coupling drive system. Background technique [0002] The new energy and electrification of automobile power has become the focus and hot spot of global development. [0003] Existing electric vehicles generally use a single-motor pure electric drive scheme. The motor operating point is strongly coupled with the vehicle operating point, and the electric drive efficiency is difficult to optimize, which shortens the cruising range of the vehicle on a single charge. Since the torque increase of a single motor will affect the system cost, some vehicles adopt the scheme of decelerating and increasing the torque of the motor with a large speed ratio, but this scheme has the reliability risk caused by the long-term high-speed operation of the motor. [0004] The hybrid hybrid system has great performance advantages over t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K6/365B60K6/38B60K6/26B60K6/28
CPCB60K6/26B60K6/28B60K6/365B60K6/38Y02T10/62
Inventor 杨林鄢挺周维羌嘉曦
Owner SHANGHAI JIAO TONG UNIV
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