CN202357849U - Hybrid driving device - Google Patents

Abstract

The utility model provides a hybrid driving device, which belongs to the technical field of automobile driving. It solves the problems of complex structure of the drive device in the prior art, large size of the drive motor, large and difficult arrangement space and high cost. The hybrid driving device includes an engine, and also includes a BSG arranged at the front end of the engine, a front drive shaft for connecting the front wheels, a reduction mechanism for transmitting engine power, and an energy storage device electrically connected to the BSG. The BSG is used to provide large The starting torque directly drives the engine to the high-efficiency zone, the engine output shaft is connected to the reduction mechanism, the reduction mechanism is connected to the front drive shaft gear, and the energy storage device is also connected to two hub motors respectively arranged on the rear wheels. The device has a simple structure, requires little modification to traditional vehicles, can achieve energy saving and emission reduction, and reduces costs.

Description

A hybrid drive

technical field

The utility model belongs to the technical field of automobile driving and relates to a hybrid driving device.

Background technique

At present, under the general environment of advocating energy saving and emission reduction, hybrid electric vehicles not only maintain the advantages of ultra-low emissions of pure electric vehicles, but also give full play to the advantages of high specific energy of traditional internal combustion engine vehicles, and perform excellently in energy conservation and environmental protection. All countries in the world are competing to research and develop new vehicles, which will become the development trend of the automobile industry.

For traditional cars, the fuel economy and emission performance of the internal combustion engine are not good when starting, accelerating, climbing and other heavy loads. The engine is used to meet the starting, accelerating, climbing and other working conditions, and the auxiliary device is used to assist at high speeds. Engine driving requires the engine to have a large backup power, and the car is often driven on flat roads, so too much backup power will inevitably lead to waste of energy, and the energy wasted by the engine idling also accounts for most of the fuel consumption of the engine , the results show that the useful power of traditional engine-driven vehicles is less than half. In order to improve the fuel economy and emission performance of traditional vehicles, it is necessary to develop hybrid vehicles.

BSG is an acronym for micro-hybrid system. BSG technology is mainly used in short-term idling conditions such as traffic jams, parking idling and other traffic lights.

Chinese patent literature discloses a hybrid drive system with the patent number 200810141756. As shown in Figure 1, the system includes an engine, a first clutch, a first motor, a second motor, a second clutch, an energy storage device, and a speed reduction mechanism, the engine is connected with the speed reduction mechanism through the first clutch, and the energy storage device is connected to the speed reduction mechanism. The first motor is electrically connected with the second motor respectively, the second motor is connected with the reduction mechanism, and the engine is connected with the first motor through the second clutch. According to the required power of the drive system and the energy storage state of the energy storage device, the system controls the drive system to be in the pure electric working condition, series working condition, hybrid working condition, three power source working condition, engine working condition, etc., but this system still exists The following disadvantages: 1. The system uses two clutches and two motors, the structure is complex, the driving motor has a large size, and the layout space is large and difficult; 2. The system has high requirements on the performance of the driving motor, which increases the manufacturing cost. 3. Energy transfer means that the energy storage device transmits electric energy to the drive motor, and the drive motor then transmits the drive force to the wheels. During the whole process, the mechanical efficiency is low and the mechanical loss is large.

Contents of the invention

The utility model aims at the above-mentioned problems in the existing technology, and proposes a hybrid driving device. The device has a simple structure, little modification to the traditional vehicle, and can achieve energy saving, emission reduction and cost reduction.

The utility model is realized through the following technical solutions: a hybrid driving device, including an engine, characterized in that it also includes a BSG arranged at the front end of the engine, a front drive shaft for connecting the front wheels, and a deceleration unit for transmitting engine power. The mechanism and the energy storage device electrically connected with the BSG, the BSG is used to provide a large starting torque to drive the engine directly to the high efficiency area, the output shaft of the engine is connected to the reduction mechanism, and the reduction mechanism is connected to the front drive shaft gear , the energy storage device is also connected with two hub motors respectively arranged on the rear wheels.

When starting at idle speed, the starting torque provided by BSG directly drags the speed of the engine to the speed in the high-efficiency zone, thereby reducing the fuel consumption of the engine at idle speed; when driving normally, the power provided by the engine directly drives the front drive shaft to rotate, thereby driving When the car is running; when there is a heavy load such as acceleration or climbing, the engine and the hub motor run at the same time to provide power. On the one hand, the engine power is transmitted to the reduction mechanism to drive the drive shaft to rotate, thereby driving the front wheels to rotate; on the other hand, the hub motor works to drive the rear wheels to rotate. , to achieve four-wheel drive. Thereby ensuring that the engine always works in the high efficiency zone.

In the above hybrid drive device, the BSG includes an integrated starter/generator and a controller connected to the integrated starter/generator, and the controller is connected to an energy storage device. When the car is running normally, the engine drives the integrated starter/generator to charge the energy storage device. When encountering a traffic jam or a red light, the engine stops working, and the energy storage device releases a momentary high current through the controller, and the integrated starter/generator is started to drive the engine to idle speed in a short time.

In the aforementioned hybrid drive device, the integrated starter/generator is connected to the generator through a gear transmission mechanism. The integrated starter/generator drives the engine to rotate through the combination of gears.

In the aforementioned hybrid drive device, the rear wheels are connected through a rear drive shaft. Here, the power of the two wheels of the rear wheel is mutually matched so that the two wheels rotate on the same straight line at the same speed.

In the above hybrid driving device, the energy storage device is a power battery pack. Due to the need to repeatedly provide stable high-voltage current to the BSG motor during the driving process of the car, the performance of this power battery pack is higher than that of ordinary batteries.

Compared with the prior art, the utility model has the following advantages:

1. The utility model forms a hybrid drive device through the combination of BSG, engine and hub motor, which can realize the best capacity output matching according to the actual situation of automobile operation. The device has a simple structure, little modification to traditional vehicles, and can achieve energy saving Reduce emissions and reduce costs;

2. The utility model directly drives the rear wheel to run by installing the hub motor on the rear wheel, which reduces the transmission mechanism and improves the transmission efficiency;

3. The utility model realizes the idle start and stop function of the engine by connecting the integrated starter/generator of the BSG with the gear of the engine, and has a simple structure;

Description of drawings

Fig. 1 is the structural block diagram of the hybrid drive system whose application number is CN200810141756;

Fig. 2 is a structural representation of the utility model;

In the figure 1, energy storage device; 2, engine; 3, deceleration mechanism; 4, gear transmission mechanism; 5, BSG; 51, integrated starter/generator; 52, controller; 6, front wheel; 61, front drive Shaft; 7, hub motor; 71, rear drive shaft.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 2, this hybrid driving device comprises engine 2, also comprises the BSG 5 that is arranged on the front end of engine 2, is used to connect the front drive shaft 61 of front wheel, is used to transmit the speed reduction mechanism 3 of engine 2 power and with BSG 5 electrically connected energy storage device 1 . The BSG 5 includes an integrated starter/generator 51 and a controller 52 connected to the integrated starter/generator 51, and the controller 52 is connected to the energy storage device 1, and the integrated starter/generator 51 and the generator pass through the gear transmission mechanism 4 Connected, BSG 5 is used to provide large starting torque to drag engine 2 directly to the high efficiency zone. The engine 2 output shaft is connected with the reduction mechanism 3, and the reduction mechanism 3 is connected with the front drive shaft 61 gears. The energy storage device 1 is a power battery pack, and the energy storage device 1 is also connected with two in-wheel motors 7 respectively arranged on the rear wheels, and the rear wheels are connected through a rear drive shaft 71 .

The working principle of the hybrid drive is as follows:

When the controller 52 in the BSG 5 detects that the current vehicle is starting at idle speed, the engine 2 stops working, and the controller 52 controls the power battery pack to release a momentary high current, allowing the integrated starter/generator 51 to provide the starting torque to pass through in a short time. The gear transmission mechanism 4 directly drags the speed of the engine 2 to the speed of the high-efficiency zone, thereby reducing the fuel consumption of the engine 2 at idle speed; when the car is running normally, the engine 2 provides power to the reduction mechanism 3 to directly drive the front drive shaft 61 rotates to drive the car to run, while the controller 52 controls the engine 2 to drive the integrated starter/generator 51 to charge the energy storage device 1; when accelerating or climbing a large load, the engine 2 and the hub motor 7 run simultaneously to provide power. On the one hand, the power of the engine 2 is transmitted to the speed reduction mechanism 3 to drive the front drive shaft 61 to rotate, thereby driving the front wheel 6 to rotate, and on the other hand, the hub motor 7 works to drive the rear drive shaft 71 to rotate to realize four-wheel drive. Therefore, it is ensured that the engine 2 always works in the high-efficiency zone.

The BSG 5 technology adds a controller 52 to the traditional engine 2 technology, and the power storage function of the power battery pack is stronger than the traditional one. When the car is running normally, the integrated starter/generator 51 in the BSG5 is the same as the traditional generator, and the engine 2 drives the integrated starter/generator 51 to charge the power battery pack. When encountering a traffic jam or a red light, the engine 2 stops working, and the power battery pack releases a momentary high current through the controller 52, and the integrated starter/generator 51 is started in a short time to drive the engine 2 to an idle state. The time takes about 0.4 seconds. BSG 5 is simple in technology and less costly, but the effect is significant. Under the premise of mass production, it only costs about 1,000 yuan to install BSG 5 on existing passenger cars, and BSG 5 technology can reduce fuel consumption by 5%-10% and reduce carbon dioxide emissions by about 10%. Thereby, the purpose of energy saving, emission reduction and cost reduction can be achieved with little modification to the traditional car.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this paper uses more energy storage device 1, engine 2, reduction mechanism 3, gear transmission mechanism 4, BSG 5, integrated starter/generator 51, 52, controller; front wheel 6, front drive shaft 61, wheel hub Motor 7, rear drive shaft 71 and other terms, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (5)

1. A hybrid driving device, comprising an engine (2), is characterized in that it also includes a BSG (5) arranged at the front end of the engine (2), a front drive shaft (61) for connecting the front wheels, and a front drive shaft (61) for transmitting The deceleration mechanism (3) powered by the engine (2) and the energy storage device (1) electrically connected to the BSG (5), the BSG (5) is used to provide a large starting torque to drag the engine (2) directly to the high In the efficiency zone, the output shaft of the engine (2) is connected to the reduction mechanism (3), the reduction mechanism (3) is connected to the front drive shaft (61) gear, and the energy storage device (1) is also connected to the Two hub motors (7) on the rear wheels. 2. The hybrid drive device according to claim 1, characterized in that the BSG (5) includes an integrated starter/generator (51) and a controller connected to the integrated starter/generator (51) (52), the controller (52) is connected to the energy storage device (1). 3. The hybrid drive device according to claim 2, characterized in that, the integrated starter/generator (51) is connected to the generator through a gear transmission mechanism (4), and the integrated starter/generator ( 51) drive the engine (2) to rotate by the combination of gears. 4. The hybrid driving device according to claim 1, 2 or 3, characterized in that the rear wheels are connected through a rear drive shaft (71). 5. The hybrid driving device according to claim 4, characterized in that, the energy storage device (1) is a power battery pack. the

Images