CN103802654A - Single-motor hybrid driving device - Google Patents

Abstract

The invention discloses a single-motor hybrid driving device, which includes an internal combustion engine, an electric motor/generator, and a power conversion device. The power conversion device includes a power input end and a power output end. The input end is connected, the motor/generator is arranged on the power input end or the power output end of the power conversion device, and the power conversion device also includes a planetary gear mechanism and a continuously variable transmission mechanism, and the planetary gear mechanism includes a sun gear, The planetary gear carrier and the ring gear, the input end and the output end of the continuously variable transmission mechanism are respectively connected with any two of the sun gear, the planetary gear carrier and the ring gear; the present invention can realize various functions of the hybrid electric vehicle , and can better meet the fuel economy and power requirements of hybrid vehicles, and is especially suitable for severe hybrid vehicles including plug-in hybrid vehicles.

Description

Single Motor Hybrid Drive

technical field

The invention belongs to the field of hybrid driving devices, and in particular relates to a single-motor hybrid driving device.

Background technique

Energy saving and emission reduction has become the development theme of the automobile industry, and the voice of launching pure electric vehicles is increasing day by day. However, due to the constraints of technology, policy and many other factors, the current pure electric vehicle industry is still unable to achieve full marketization. Under such circumstances, the hybrid electric vehicle, which combines the advantages of pure electric vehicles and traditional internal combustion engine vehicles, has gradually increased its market share due to its outstanding performance in energy saving and environmental protection, and its industrial development technology has also become increasingly mature.

According to the different power sources in the hybrid system, the hybrid drive device is mainly divided into two categories: a dual-motor solution hybrid drive device and a single-motor solution hybrid drive device.

Hybrid drive with dual motor concept:

Toyota's Prius is a hybrid vehicle that entered the market earlier and is currently the most successful hybrid vehicle on the market. Toyota Prius adopts a hybrid drive device with a dual-motor scheme, in which the internal combustion engine is connected to the planetary gear carrier, and the power is transmitted to the ring gear and the sun gear through the planetary gear. The axle is connected to the No. 1 motor/generator. The power split mechanism composed of the planetary gear mechanism divides the output power of the internal combustion engine, part of which is directly transmitted to the drive shaft, and the other part is supplied to the motor or battery pack through the No. 1 electric motor/generator, which is controlled by the multi-energy energy management system. Group charging, or used to drive the second motor/generator to increase the driving force of the car.

Hybrid drive for single-motor concept

Another successful hybrid model on the market, the Honda CR-Z, uses the Honda IMA hybrid system. The hybrid power system uses the internal combustion engine and the motor/generator torque superposition method for power mixing. The output of the internal combustion engine is directly connected to the motor/generator rotor through the clutch, and the battery pack acts on the motor/generator rotor through the controller. The power superposition of the two is Realized at the output shaft, the transmission is still single-shaft input. The system is a constant-speed power superposition system, with the internal combustion engine as the main power and the electric/generator as the auxiliary power.

The internal combustion engine in the hybrid driving device of the dual-motor scheme has high working efficiency, but the structure is complicated. The single-motor solution does not require major changes to the traditional car, but the working efficiency of the internal combustion engine is still far behind that of the dual-motor solution.

Therefore, the market is in urgent need of a hybrid driving device with a simple structure and a higher efficiency single-motor solution.

Contents of the invention

In view of this, the object of the present invention is to provide a single-motor hybrid driving device with high efficiency to overcome the defect of low efficiency of single-motor hybrid driving devices in the prior art.

The purpose of the present invention is achieved through the following technical solutions:

A single-motor hybrid driving device, including an internal combustion engine, a motor/generator, and a power conversion device, the power conversion device includes a power input end and a power output end, and the internal combustion engine is connected to the power input end of the power conversion device through a clutch, The motor/generator is arranged on the power input end or the power output end of the power conversion device, and the power conversion device also includes a planetary gear mechanism and a continuously variable transmission mechanism, and the planetary gear mechanism includes a sun gear, a planetary gear carrier and The ring gear, the input end and the output end of the continuously variable transmission mechanism are respectively connected to any two of the sun gear, the planetary gear carrier and the ring gear;

Further, a shock absorber for shock absorption is also arranged between the internal combustion engine and the clutch;

Further, the shock absorber arranged between the internal combustion engine and the clutch is a dual-mass flywheel.

The beneficial effects of the present invention are: the single-motor hybrid driving device of the present invention connects the input end and the output end of the continuously variable transmission mechanism to respectively connect two elements in the three elements of the planetary gear mechanism to form a new speed change mechanism, thereby changing the power The output speed and torque of the conversion device, the present invention can provide a large speed ratio variation range and make the speed ratio continuously stepless change, when the internal combustion engine and the electric motor/generator work together, the speed ratio of the power conversion device can be continuously and steplessly changed The speed of the internal combustion engine can be adapted to the change of the required speed, and the torque can be adjusted by the electric motor/generator to make the output torque of the drive device meet the required torque, so that the required torque can be completed without changing the working area of the internal combustion engine. Speed adaptation.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from It is taught in the practice of the present invention. The objects and other advantages of the invention may be realized and attained by the following specification.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention;

FIG. 3 is a schematic structural view of Embodiment 3 of the present invention;

FIG. 4 is a schematic structural view of Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 6 of the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 7 of the present invention;

Fig. 8 is a schematic structural diagram of Embodiment 8 of the present invention;

Among the figure, 10, internal combustion engine, 20, electric motor/generator, 30, planetary gear mechanism, 31, sun gear, 32 planetary gear carrier, 33, ring gear, 40, continuously variable transmission mechanism, 60, drive axle device, 70, Power input shaft, 80, power output shaft, c1, clutch.

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

Embodiment one:

As shown in Figure 1, the single-motor hybrid driving device of the present embodiment includes an internal combustion engine 10, a motor/generator 20 and a power conversion device, and the power conversion device includes a power input shaft 70 and a power output shaft 80, and the internal combustion engine 10 The clutch c1 is connected to the power input shaft 70 of the power conversion device, the motor/generator 20 is arranged on the power input shaft 70 of the power conversion device, and the power conversion device also includes a planetary gear mechanism 30 and a continuously variable transmission mechanism 40 , the planetary gear mechanism 30 includes a sun gear 31, a planetary gear carrier 32 and a ring gear 33, the input end of the continuously variable transmission mechanism 40 is connected with the planetary gear carrier 32, and its output end is connected with the ring gear 33; in this implementation , the power input shaft 70 of the power conversion device is in drive connection with the planetary gear carrier 32 , and its power output shaft 80 is connected with the sun gear 31 , and finally, the power output shaft 80 of the power conversion device transmits power to the transaxle device 60 .

The parking working condition of this embodiment: when the vehicle is stationary, if the storage battery does not need to be charged, the internal combustion engine 10 is in an off state; when the storage battery needs the internal combustion engine 10 to start charging, the internal combustion engine 10 will start to drive the electric/generator 20 in generator mode Work.

The vehicle starting condition of this embodiment: when starting the vehicle under light load and throttle closed state, only the motor/generator 20 is running, the internal combustion engine 10 is not running, and the vehicle starting is powered only by electricity.

The starting condition of the internal combustion engine in this embodiment: when the vehicle speed reaches a certain speed, the internal combustion engine 10 is started by means of the motor/generator 20 .

Low-speed driving condition in this embodiment: In the low-speed driving condition, the motor/generator 20 provides power, and the internal combustion engine 10 does not work.

The high-speed acceleration condition of this embodiment: In the high-speed acceleration condition, the internal combustion engine 10 and the motor/generator 20 jointly drive the vehicle, and the motor/generator 20 works as a motor.

The high-speed cruising condition of this embodiment: under the high-speed cruising condition, the internal combustion engine 10 and the motor/generator 20 work simultaneously, and the motor/generator 20 works as a generator.

The reversing working condition of this embodiment: when the vehicle is reversing, the motor/generator 20 works, and the internal combustion engine 10 is turned off.

The deceleration or braking working condition of this embodiment: under the decelerating or braking working condition, the internal combustion engine 10 is turned off, and the motor/generator 20 works as a generator at this time, converting mechanical energy into electrical energy to the greatest extent, and storing it in the storage battery .

The drive system of the hybrid electric vehicle of the present invention improves the fuel economy when driving at low speed (low power demand) by driving the motor/generator 20 for high-efficiency pure electric driving. The working mode of the internal combustion engine is adopted when the medium power is required. At the same time, the power conversion device composed of the continuously variable transmission mechanism 40 and the planetary gear mechanism 30 can expand the range of the speed ratio and make the speed ratio change continuously, so that the internal combustion engine can operate according to the best economic law. matching, so that the fuel efficiency of the internal combustion engine 10 is always relatively high. When the internal combustion engine 10 is working, if the power of the battery is lower than a certain lower limit, it is considered to let the motor/generator 20 work in the power generation state, while increasing the load rate of the internal combustion engine, the relative balance of the battery power is maintained, so that the overall efficiency of the power system of the vehicle can be optimized. . When high power is required, the motor/generator 20 provides auxiliary power while the internal combustion engine 10 is working, which better meets the power performance requirements of the vehicle.

Generally speaking, the drive system of the hybrid electric vehicle of the present invention is simple in structure, can realize various functions of the hybrid electric vehicle, and can better meet the requirements of the hybrid electric vehicle on fuel economy and power, and is especially suitable for use including plug-in A severe hybrid of an electric hybrid vehicle.

Embodiment 2: As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that the motor/generator 20 is arranged on the power output shaft 80 of the power conversion device, thereby forming a two-shaft parallel hybrid system, and implementing Example 1 Setting the motor/generator 20 on the power input shaft 70 of the power conversion device is a single-shaft parallel hybrid power system, and both methods can well achieve the purpose of the present invention.

The specific structures of embodiments three to eight are referred to accompanying drawings 3-8. These embodiments are specific implementations slightly changed according to different situations. The effects of the technical solutions and the inventive ideas are essentially the same, so they are all within the protection scope of the present invention. Inside.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims (3)

1. A single-motor hybrid driving device, comprising an internal combustion engine, an electric generator/generator and a power conversion device, the power conversion device comprising a power input end and a power output end, and the internal combustion engine passing through a clutch and the power input end of the power conversion device connected, the motor/generator is set on the power input end or the power output end of the power conversion device, and it is characterized in that: the power conversion device also includes a planetary gear mechanism and a continuously variable transmission mechanism, and the planetary gear mechanism includes a sun The input end and the output end of the continuously variable transmission mechanism are respectively connected to any two of the sun gear, the planetary gear carrier and the ring gear. 2. The single-motor hybrid driving device according to claim 1, characterized in that: a shock absorber for shock absorption is further arranged between the internal combustion engine and the clutch. 3. The single-motor hybrid driving device according to claim 2, characterized in that: the shock absorber provided between the internal combustion engine and the clutch is a dual-mass flywheel.

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